<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:e9ea0f38-5b2b-444e-9dc4-161d2db50c79,g:bac201de-36b5-40bc-bdc0-05e884deb632-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.aa.com/role/Cover" xlink:type="simple" xlink:href="aal-20231231.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_06f338e1-21c1-47ed-abfe-2a33f3db662f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentInformationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentInformationTable_06f338e1-21c1-47ed-abfe-2a33f3db662f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2de86de1-b7a4-4873-b238-a1871b67304e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_06f338e1-21c1-47ed-abfe-2a33f3db662f" xlink:to="loc_dei_LegalEntityAxis_2de86de1-b7a4-4873-b238-a1871b67304e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2de86de1-b7a4-4873-b238-a1871b67304e_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2de86de1-b7a4-4873-b238-a1871b67304e" xlink:to="loc_dei_EntityDomain_2de86de1-b7a4-4873-b238-a1871b67304e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e92a3faa-cc04-4381-8b4c-9cc1f530cfb3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2de86de1-b7a4-4873-b238-a1871b67304e" xlink:to="loc_dei_EntityDomain_e92a3faa-cc04-4381-8b4c-9cc1f530cfb3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_15453693-19b5-4227-99c6-d48f4ed9b3fa" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e92a3faa-cc04-4381-8b4c-9cc1f530cfb3" xlink:to="loc_aal_AmericanAirlinesIncMember_15453693-19b5-4227-99c6-d48f4ed9b3fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_96def8c7-a350-423c-92b3-2bc75043d1c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_06f338e1-21c1-47ed-abfe-2a33f3db662f" xlink:to="loc_us-gaap_StatementClassOfStockAxis_96def8c7-a350-423c-92b3-2bc75043d1c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_96def8c7-a350-423c-92b3-2bc75043d1c2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_96def8c7-a350-423c-92b3-2bc75043d1c2" xlink:to="loc_us-gaap_ClassOfStockDomain_96def8c7-a350-423c-92b3-2bc75043d1c2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_2d044acc-654a-492a-8cbc-7248f1123e88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_96def8c7-a350-423c-92b3-2bc75043d1c2" xlink:to="loc_us-gaap_ClassOfStockDomain_2d044acc-654a-492a-8cbc-7248f1123e88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_2859564b-d38b-4a66-9c83-ca9d7c6b9783" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2d044acc-654a-492a-8cbc-7248f1123e88" xlink:to="loc_us-gaap_CommonStockMember_2859564b-d38b-4a66-9c83-ca9d7c6b9783" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_1d55ec55-bb63-4473-91ef-9dc9027e0338" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_2d044acc-654a-492a-8cbc-7248f1123e88" xlink:to="loc_us-gaap_WarrantMember_1d55ec55-bb63-4473-91ef-9dc9027e0338" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_28e0313a-51fe-4b6b-8a30-6545a67028e0" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentType_28e0313a-51fe-4b6b-8a30-6545a67028e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_73c7c883-cc13-4c88-a5c1-a1eb9907b7ab" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_AmendmentFlag_73c7c883-cc13-4c88-a5c1-a1eb9907b7ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_8caabb1f-f851-4a7f-9165-ffe7f4e766cc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentAnnualReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentAnnualReport_8caabb1f-f851-4a7f-9165-ffe7f4e766cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_c8ccab5e-0548-48fa-914a-3da102610477" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentPeriodEndDate_c8ccab5e-0548-48fa-914a-3da102610477" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_8322e985-cabd-4728-a7a7-b4f0fca85d09" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentTransitionReport_8322e985-cabd-4728-a7a7-b4f0fca85d09" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_c0b935b9-9df3-4a30-8446-7f929d95dbc7" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityFileNumber_c0b935b9-9df3-4a30-8446-7f929d95dbc7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_8794e130-2d60-410b-afa7-4b80775a5593" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityRegistrantName_8794e130-2d60-410b-afa7-4b80775a5593" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_c2e9af4a-cef8-4c07-9c06-4fec308ac4dc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityCentralIndexKey_c2e9af4a-cef8-4c07-9c06-4fec308ac4dc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_db4b3512-a4bc-42ce-b173-7dd81a6f11f3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_CurrentFiscalYearEndDate_db4b3512-a4bc-42ce-b173-7dd81a6f11f3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_6bd3bc8b-36ad-453d-be97-2d592951eb5d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentFiscalYearFocus_6bd3bc8b-36ad-453d-be97-2d592951eb5d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_885f7bc4-24fc-4fbf-bc69-df23e3b33c00" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentFiscalPeriodFocus_885f7bc4-24fc-4fbf-bc69-df23e3b33c00" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_28254d3a-e9b3-4540-8dc6-b75d4f27c2fc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityIncorporationStateCountryCode_28254d3a-e9b3-4540-8dc6-b75d4f27c2fc" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_5b94cc82-54e7-4803-9d89-d6f2e6985c1a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityTaxIdentificationNumber_5b94cc82-54e7-4803-9d89-d6f2e6985c1a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_03305db6-48a8-4320-bd15-4f3dc53c0542" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityAddressAddressLine1_03305db6-48a8-4320-bd15-4f3dc53c0542" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_54921110-5ad1-408c-a540-73bb8215a0a7" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityAddressCityOrTown_54921110-5ad1-408c-a540-73bb8215a0a7" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_4988810a-8ecf-4589-aeee-b843805871d5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityAddressStateOrProvince_4988810a-8ecf-4589-aeee-b843805871d5" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_5121e4f6-11ba-4fcf-b6fc-91b805cd3370" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityAddressPostalZipCode_5121e4f6-11ba-4fcf-b6fc-91b805cd3370" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_19f0c5b6-e106-4caf-8591-217d7c11729d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_CityAreaCode_19f0c5b6-e106-4caf-8591-217d7c11729d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_143833ce-494c-4abb-9559-22dab3049a1b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_LocalPhoneNumber_143833ce-494c-4abb-9559-22dab3049a1b" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_d570b1e3-42fb-439c-b3b9-aab2c556b1ee" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_Security12bTitle_d570b1e3-42fb-439c-b3b9-aab2c556b1ee" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_095b1af9-d751-4734-af23-2e1982f8df18" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_TradingSymbol_095b1af9-d751-4734-af23-2e1982f8df18" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_07cdee83-1e9f-42c6-936f-26e4e08debb2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_SecurityExchangeName_07cdee83-1e9f-42c6-936f-26e4e08debb2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_e5a2dd43-6d1d-4ffe-8808-a1399da32609" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityWellKnownSeasonedIssuer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_e5a2dd43-6d1d-4ffe-8808-a1399da32609" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_5739c9cb-5cdb-4fe2-b366-15cccabb5bc3" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityVoluntaryFilers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityVoluntaryFilers_5739c9cb-5cdb-4fe2-b366-15cccabb5bc3" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_2520547b-c483-44de-a4c9-82ab63fd39b9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityCurrentReportingStatus_2520547b-c483-44de-a4c9-82ab63fd39b9" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_63f808b8-e01b-47de-9a63-1cb3dbf72892" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityInteractiveDataCurrent_63f808b8-e01b-47de-9a63-1cb3dbf72892" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_380b72f8-6d71-41f1-8490-2914b0cfce34" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityFilerCategory_380b72f8-6d71-41f1-8490-2914b0cfce34" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_cbfcd021-6ebf-41a9-99f1-af45824bca8a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntitySmallBusiness_cbfcd021-6ebf-41a9-99f1-af45824bca8a" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_fc94df46-5a05-424a-992c-d5e361293e36" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityEmergingGrowthCompany_fc94df46-5a05-424a-992c-d5e361293e36" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_ae631802-b480-4de0-8a44-180bce282650" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_IcfrAuditorAttestationFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_IcfrAuditorAttestationFlag_ae631802-b480-4de0-8a44-180bce282650" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFinStmtErrorCorrectionFlag_aef8a37c-3f99-47cf-b38c-0ee23b7ef65e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentFinStmtErrorCorrectionFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentFinStmtErrorCorrectionFlag_aef8a37c-3f99-47cf-b38c-0ee23b7ef65e" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_d3bc5cad-75c9-486d-9881-2bb3fe5679fd" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityShellCompany_d3bc5cad-75c9-486d-9881-2bb3fe5679fd" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_f35c748d-2bb3-4120-9dfb-aa238180fac4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_f35c748d-2bb3-4120-9dfb-aa238180fac4" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityPublicFloat_802e8360-7b51-425d-86fc-e48f75cd45dc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityPublicFloat"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_EntityPublicFloat_802e8360-7b51-425d-86fc-e48f75cd45dc" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock_232c796e-324c-469c-87ff-2778e613cd3f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_1c028c4a-1cdb-40c1-b556-4ce5d73ac09e" xlink:to="loc_dei_DocumentsIncorporatedByReferenceTextBlock_232c796e-324c-469c-87ff-2778e613cd3f" xlink:type="arc" order="34"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/AuditInformation" xlink:type="simple" xlink:href="aal-20231231.xsd#AuditInformation"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/AuditInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorLineItems_ad75a965-31c0-4e26-a2f5-241121da11f4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorTable_f7734be0-2860-46fc-972a-c55449d39e68" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_AuditorLineItems_ad75a965-31c0-4e26-a2f5-241121da11f4" xlink:to="loc_dei_AuditorTable_f7734be0-2860-46fc-972a-c55449d39e68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2f858dd1-dad3-44de-b5d3-3399e6f3d996" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_AuditorTable_f7734be0-2860-46fc-972a-c55449d39e68" xlink:to="loc_dei_LegalEntityAxis_2f858dd1-dad3-44de-b5d3-3399e6f3d996" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2f858dd1-dad3-44de-b5d3-3399e6f3d996_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2f858dd1-dad3-44de-b5d3-3399e6f3d996" xlink:to="loc_dei_EntityDomain_2f858dd1-dad3-44de-b5d3-3399e6f3d996_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c4949675-fdbf-4485-a7a2-e368ecda1734" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2f858dd1-dad3-44de-b5d3-3399e6f3d996" xlink:to="loc_dei_EntityDomain_c4949675-fdbf-4485-a7a2-e368ecda1734" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_2a074794-6a91-454b-a66e-dc5d03a3c3a5" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_c4949675-fdbf-4485-a7a2-e368ecda1734" xlink:to="loc_aal_AmericanAirlinesIncMember_2a074794-6a91-454b-a66e-dc5d03a3c3a5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorName_4287f96a-daf2-4ad1-abf4-9d4713c80749" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AuditorLineItems_ad75a965-31c0-4e26-a2f5-241121da11f4" xlink:to="loc_dei_AuditorName_4287f96a-daf2-4ad1-abf4-9d4713c80749" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorLocation_12552644-f0af-4930-bd41-5df24ebe7f74" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorLocation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AuditorLineItems_ad75a965-31c0-4e26-a2f5-241121da11f4" xlink:to="loc_dei_AuditorLocation_12552644-f0af-4930-bd41-5df24ebe7f74" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AuditorFirmId_e542a2c5-e375-4531-a2c6-f848c906d21f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_AuditorFirmId"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_AuditorLineItems_ad75a965-31c0-4e26-a2f5-241121da11f4" xlink:to="loc_dei_AuditorFirmId_e542a2c5-e375-4531-a2c6-f848c906d21f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofOperationsAmericanAirlinesGroupInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofOperationsAmericanAirlinesGroupInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofOperationsAmericanAirlinesGroupInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ee940b42-7891-405f-b62d-ce0825c54321" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_StatementTable_ee940b42-7891-405f-b62d-ce0825c54321" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_dbf0641f-e17f-4824-9f5e-f2ba87b377e0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ee940b42-7891-405f-b62d-ce0825c54321" xlink:to="loc_srt_ProductOrServiceAxis_dbf0641f-e17f-4824-9f5e-f2ba87b377e0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_dbf0641f-e17f-4824-9f5e-f2ba87b377e0_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_dbf0641f-e17f-4824-9f5e-f2ba87b377e0" xlink:to="loc_srt_ProductsAndServicesDomain_dbf0641f-e17f-4824-9f5e-f2ba87b377e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4150da7e-da40-4dbf-baf2-d14a0c5ea5cd" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_dbf0641f-e17f-4824-9f5e-f2ba87b377e0" xlink:to="loc_srt_ProductsAndServicesDomain_4150da7e-da40-4dbf-baf2-d14a0c5ea5cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassengerMember_9bb6e5b8-4146-4d02-8bfd-09e6c6fd3dc9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PassengerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4150da7e-da40-4dbf-baf2-d14a0c5ea5cd" xlink:to="loc_us-gaap_PassengerMember_9bb6e5b8-4146-4d02-8bfd-09e6c6fd3dc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CargoAndFreightMember_d5092b32-5275-4c86-a528-28caa281b83b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CargoAndFreightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4150da7e-da40-4dbf-baf2-d14a0c5ea5cd" xlink:to="loc_us-gaap_CargoAndFreightMember_d5092b32-5275-4c86-a528-28caa281b83b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_f10dc82c-4a51-415f-8bfd-8cf0ff757424" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4150da7e-da40-4dbf-baf2-d14a0c5ea5cd" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_f10dc82c-4a51-415f-8bfd-8cf0ff757424" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_d74e6c8b-3525-4fe5-af32-cca0e6961a60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_RevenuesAbstract_d74e6c8b-3525-4fe5-af32-cca0e6961a60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_941863db-4276-4155-96ac-fcba0af3f615" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_d74e6c8b-3525-4fe5-af32-cca0e6961a60" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_941863db-4276-4155-96ac-fcba0af3f615" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FuelCosts_4d1be488-e5ac-4463-a79e-c207eab1ded6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FuelCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_FuelCosts_4d1be488-e5ac-4463-a79e-c207eab1ded6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_d9c78150-d8fc-4777-bc47-2750c4514b64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_LaborAndRelatedExpense_d9c78150-d8fc-4777-bc47-2750c4514b64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_d74ce3a8-baa9-4324-a174-e11e3e3d6c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_d74ce3a8-baa9-4324-a174-e11e3e3d6c5f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_848435dc-d0e3-400f-9744-2a938a2bbdd8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AircraftMaintenanceMaterialsAndRepairs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_848435dc-d0e3-400f-9744-2a938a2bbdd8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandingFeesAndOtherRentals_be3bc7f9-979b-4844-ab70-2e0f4cf533b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LandingFeesAndOtherRentals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_LandingFeesAndOtherRentals_be3bc7f9-979b-4844-ab70-2e0f4cf533b8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AircraftRental_0cd97279-bf94-4338-8408-1b3619941aa0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AircraftRental"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_AircraftRental_0cd97279-bf94-4338-8408-1b3619941aa0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_38891eaa-1d6b-4260-a01d-c71c99f44029" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_SellingAndMarketingExpense_38891eaa-1d6b-4260-a01d-c71c99f44029" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_8cb4563e-1032-4506-89c7-02a5c7e5bd9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_DepreciationAndAmortization_8cb4563e-1032-4506-89c7-02a5c7e5bd9b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestructuringAndOtherExpenseIncomeMainline_70d5f7ee-b8e5-4ab1-bdbb-5adf3c4fc7fb" xlink:href="aal-20231231.xsd#aal_RestructuringAndOtherExpenseIncomeMainline"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_aal_RestructuringAndOtherExpenseIncomeMainline_70d5f7ee-b8e5-4ab1-bdbb-5adf3c4fc7fb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_c8798448-888b-4971-8a86-3eed2de6891e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_c8798448-888b-4971-8a86-3eed2de6891e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_cab72c90-2194-45a6-bc7e-6c54997cbaa4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_2a757eaf-c510-4878-b3e7-9db8790270f8" xlink:to="loc_us-gaap_CostsAndExpenses_cab72c90-2194-45a6-bc7e-6c54997cbaa4" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_9f540f2a-228f-4de3-becf-cb23b0b4883c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_OperatingIncomeLoss_9f540f2a-228f-4de3-becf-cb23b0b4883c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_5797ce9f-d222-47ea-8b2d-aefd1e4ff32f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:to="loc_us-gaap_InvestmentIncomeInterest_5797ce9f-d222-47ea-8b2d-aefd1e4ff32f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_b8b4c7b8-9812-4b84-9bc2-fc96fc952f99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:to="loc_us-gaap_InterestExpense_b8b4c7b8-9812-4b84-9bc2-fc96fc952f99" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_ce80a1ce-6753-4fd0-9537-b92bb2acdfec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_ce80a1ce-6753-4fd0-9537-b92bb2acdfec" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_25926e37-f15d-4c29-9961-e4e025f5efad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_76bfae75-a1d5-4c4e-b859-6ade22b19557" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_25926e37-f15d-4c29-9961-e4e025f5efad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_695e015f-0a00-4e40-9b81-277771833f07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_695e015f-0a00-4e40-9b81-277771833f07" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_57f4b642-a6e5-442b-b1e0-a686d8656a16" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_57f4b642-a6e5-442b-b1e0-a686d8656a16" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_68fdfe00-a235-4efe-8e23-44825b6c0d66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_NetIncomeLoss_68fdfe00-a235-4efe-8e23-44825b6c0d66" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareAbstract_c52971fd-7cb8-4003-95ca-c8d2b647cc3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_EarningsPerShareAbstract_c52971fd-7cb8-4003-95ca-c8d2b647cc3e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_4d800718-1fe0-4f7c-9575-4074f9465e63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_c52971fd-7cb8-4003-95ca-c8d2b647cc3e" xlink:to="loc_us-gaap_EarningsPerShareBasic_4d800718-1fe0-4f7c-9575-4074f9465e63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_61556747-fa13-43da-b159-c81bde6133ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_c52971fd-7cb8-4003-95ca-c8d2b647cc3e" xlink:to="loc_us-gaap_EarningsPerShareDiluted_61556747-fa13-43da-b159-c81bde6133ef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_99d3379e-885b-4b0e-b3eb-e7836c524d77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_61bf8cca-0453-4ca6-a84e-bfb9c58a38af" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_99d3379e-885b-4b0e-b3eb-e7836c524d77" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2d641e85-f306-48e8-9bb9-13889e04a843" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_99d3379e-885b-4b0e-b3eb-e7836c524d77" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_2d641e85-f306-48e8-9bb9-13889e04a843" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_758d6348-8d4f-4c8d-9877-9a45bb2b7022" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_99d3379e-885b-4b0e-b3eb-e7836c524d77" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_758d6348-8d4f-4c8d-9877-9a45bb2b7022" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofOperationsAmericanAirlinesInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofOperationsAmericanAirlinesInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofOperationsAmericanAirlinesInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_ac1239db-62e8-4b6a-96c6-518dc69ad411" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_StatementTable_ac1239db-62e8-4b6a-96c6-518dc69ad411" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ac1239db-62e8-4b6a-96c6-518dc69ad411" xlink:to="loc_dei_LegalEntityAxis_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4" xlink:to="loc_dei_EntityDomain_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3bac8ece-f8de-4a15-909b-02dba5a9fb61" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ef0a8d27-6047-42d3-a559-84ec0f4f1ba4" xlink:to="loc_dei_EntityDomain_3bac8ece-f8de-4a15-909b-02dba5a9fb61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_110b4d4a-338a-4fd8-a0b7-47773a9d97bc" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3bac8ece-f8de-4a15-909b-02dba5a9fb61" xlink:to="loc_aal_AmericanAirlinesIncMember_110b4d4a-338a-4fd8-a0b7-47773a9d97bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_a8526e76-863a-4d29-b27e-5cae622f30f6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_ac1239db-62e8-4b6a-96c6-518dc69ad411" xlink:to="loc_srt_ProductOrServiceAxis_a8526e76-863a-4d29-b27e-5cae622f30f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_a8526e76-863a-4d29-b27e-5cae622f30f6_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_a8526e76-863a-4d29-b27e-5cae622f30f6" xlink:to="loc_srt_ProductsAndServicesDomain_a8526e76-863a-4d29-b27e-5cae622f30f6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3a28dd5b-e944-4632-8cf5-ac7a7345d55f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_a8526e76-863a-4d29-b27e-5cae622f30f6" xlink:to="loc_srt_ProductsAndServicesDomain_3a28dd5b-e944-4632-8cf5-ac7a7345d55f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassengerMember_9f8a3677-628b-46da-af4a-c9a1afd2f568" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PassengerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3a28dd5b-e944-4632-8cf5-ac7a7345d55f" xlink:to="loc_us-gaap_PassengerMember_9f8a3677-628b-46da-af4a-c9a1afd2f568" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CargoAndFreightMember_5272f139-6642-4203-ae33-7804b927f373" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CargoAndFreightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3a28dd5b-e944-4632-8cf5-ac7a7345d55f" xlink:to="loc_us-gaap_CargoAndFreightMember_5272f139-6642-4203-ae33-7804b927f373" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_4ad44ab7-bab1-4a37-809f-1bf31d5d9e73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3a28dd5b-e944-4632-8cf5-ac7a7345d55f" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_4ad44ab7-bab1-4a37-809f-1bf31d5d9e73" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_1b61d683-6dad-4cd0-87e2-4b55fda8c2d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_RevenuesAbstract_1b61d683-6dad-4cd0-87e2-4b55fda8c2d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e0cd4571-a968-468e-9da8-46f46ab82bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_1b61d683-6dad-4cd0-87e2-4b55fda8c2d7" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_e0cd4571-a968-468e-9da8-46f46ab82bcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FuelCosts_6dfaad3c-2626-4b53-8522-3e500244f78e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FuelCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_FuelCosts_6dfaad3c-2626-4b53-8522-3e500244f78e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_857ec80c-2389-42d1-ae0e-5d61a532c284" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_LaborAndRelatedExpense_857ec80c-2389-42d1-ae0e-5d61a532c284" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_df6748a9-65ca-4ae9-a20a-d356e9373ccf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_df6748a9-65ca-4ae9-a20a-d356e9373ccf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_1869c6e6-b9fb-457e-b266-831219d3decc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AircraftMaintenanceMaterialsAndRepairs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_1869c6e6-b9fb-457e-b266-831219d3decc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandingFeesAndOtherRentals_523c9db3-7b36-4f68-90fa-7a59d0b005df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LandingFeesAndOtherRentals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_LandingFeesAndOtherRentals_523c9db3-7b36-4f68-90fa-7a59d0b005df" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AircraftRental_36a64c41-912e-4b05-a0cf-ff3156006c19" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AircraftRental"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_AircraftRental_36a64c41-912e-4b05-a0cf-ff3156006c19" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_974a7e5d-9053-4341-8948-2d549c0e1873" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_SellingAndMarketingExpense_974a7e5d-9053-4341-8948-2d549c0e1873" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_ea4d5672-4a7e-422c-aea7-23c978ecac96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_DepreciationAndAmortization_ea4d5672-4a7e-422c-aea7-23c978ecac96" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestructuringAndOtherExpenseIncomeMainline_540c65e7-8724-459a-89e3-1b929cda8ce0" xlink:href="aal-20231231.xsd#aal_RestructuringAndOtherExpenseIncomeMainline"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_aal_RestructuringAndOtherExpenseIncomeMainline_540c65e7-8724-459a-89e3-1b929cda8ce0" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_b26b899f-9437-44d9-a6bd-080e17d20b79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_b26b899f-9437-44d9-a6bd-080e17d20b79" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpenses_25caa7b8-6d4e-4ad2-a568-f893e31d155f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_94f305db-ee8e-4757-84a6-0276072268bd" xlink:to="loc_us-gaap_CostsAndExpenses_25caa7b8-6d4e-4ad2-a568-f893e31d155f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_fb997bf8-9f62-417a-a071-aad230684ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_OperatingIncomeLoss_fb997bf8-9f62-417a-a071-aad230684ff3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpenseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_6cc4078d-1eef-4c81-af0c-f150535c107f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:to="loc_us-gaap_InvestmentIncomeInterest_6cc4078d-1eef-4c81-af0c-f150535c107f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_e6daa90a-ae66-4452-9ae4-d662baebcbe0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:to="loc_us-gaap_InterestExpense_e6daa90a-ae66-4452-9ae4-d662baebcbe0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_256cf918-96ff-4432-96c4-ab652dd644a8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_256cf918-96ff-4432-96c4-ab652dd644a8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_aa47f096-99dd-42b7-9aec-17985b96b92f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_90fb511b-d9b7-42ca-9ba9-d53e7885436c" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_aa47f096-99dd-42b7-9aec-17985b96b92f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c7ed13ea-5dfe-4f57-93a1-633541d9f3dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_c7ed13ea-5dfe-4f57-93a1-633541d9f3dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_55673543-7d6f-4c2e-b9be-f262b2c200f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_55673543-7d6f-4c2e-b9be-f262b2c200f6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0398d777-de83-4ae8-a63e-3da9753529e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_543ba68a-add8-44aa-be7a-1207110b525c" xlink:to="loc_us-gaap_NetIncomeLoss_0398d777-de83-4ae8-a63e-3da9753529e9" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofComprehensiveIncomeLossAmericanAirlinesInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofComprehensiveIncomeLossAmericanAirlinesInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofComprehensiveIncomeLossAmericanAirlinesInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_f1398049-6dc6-4710-85f9-ad1f22c9132b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_b554e6ba-28b6-4b61-af03-1ac45143bb9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_f1398049-6dc6-4710-85f9-ad1f22c9132b" xlink:to="loc_us-gaap_StatementTable_b554e6ba-28b6-4b61-af03-1ac45143bb9b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_1838f9f2-cd98-4ab1-b298-bc42544f4723" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_b554e6ba-28b6-4b61-af03-1ac45143bb9b" xlink:to="loc_dei_LegalEntityAxis_1838f9f2-cd98-4ab1-b298-bc42544f4723" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1838f9f2-cd98-4ab1-b298-bc42544f4723_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1838f9f2-cd98-4ab1-b298-bc42544f4723" xlink:to="loc_dei_EntityDomain_1838f9f2-cd98-4ab1-b298-bc42544f4723_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_80582194-7c88-42c2-82d5-1e6157cf2c3e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1838f9f2-cd98-4ab1-b298-bc42544f4723" xlink:to="loc_dei_EntityDomain_80582194-7c88-42c2-82d5-1e6157cf2c3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_dd36c8e3-95a2-424e-90e2-b530bf782ae9" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_80582194-7c88-42c2-82d5-1e6157cf2c3e" xlink:to="loc_aal_AmericanAirlinesIncMember_dd36c8e3-95a2-424e-90e2-b530bf782ae9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_8fdb6eff-af24-4fe3-856c-927eaa371ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f1398049-6dc6-4710-85f9-ad1f22c9132b" xlink:to="loc_us-gaap_NetIncomeLoss_8fdb6eff-af24-4fe3-856c-927eaa371ac7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_488d5f7e-3b8b-473e-9748-6641917c0227" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f1398049-6dc6-4710-85f9-ad1f22c9132b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_488d5f7e-3b8b-473e-9748-6641917c0227" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_01187c96-642c-495f-836e-5a4214da8d96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_488d5f7e-3b8b-473e-9748-6641917c0227" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent_01187c96-642c-495f-836e-5a4214da8d96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_eca07173-72fd-41ee-899e-4ba3142c70d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_488d5f7e-3b8b-473e-9748-6641917c0227" xlink:to="loc_us-gaap_OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent_eca07173-72fd-41ee-899e-4ba3142c70d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9f9a8704-f0be-444d-9c8f-c37a2dad4cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_488d5f7e-3b8b-473e-9748-6641917c0227" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_9f9a8704-f0be-444d-9c8f-c37a2dad4cf4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_8d1019a1-5c73-4b05-849f-ade54d55f6ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f1398049-6dc6-4710-85f9-ad1f22c9132b" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_8d1019a1-5c73-4b05-849f-ade54d55f6ae" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesGroupInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedBalanceSheetsAmericanAirlinesGroupInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesGroupInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_9069fb54-5f87-4725-9bec-c13ce7131894" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_18d0248c-b16b-44a5-a073-359f06c3fc29" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_9069fb54-5f87-4725-9bec-c13ce7131894" xlink:to="loc_us-gaap_StatementTable_18d0248c-b16b-44a5-a073-359f06c3fc29" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_c458b225-86af-466a-911b-3fde6d109323" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_18d0248c-b16b-44a5-a073-359f06c3fc29" xlink:to="loc_srt_ProductOrServiceAxis_c458b225-86af-466a-911b-3fde6d109323" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c458b225-86af-466a-911b-3fde6d109323_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_c458b225-86af-466a-911b-3fde6d109323" xlink:to="loc_srt_ProductsAndServicesDomain_c458b225-86af-466a-911b-3fde6d109323_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9d6e6fe5-e753-4487-9808-12b6552eb6e9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_c458b225-86af-466a-911b-3fde6d109323" xlink:to="loc_srt_ProductsAndServicesDomain_9d6e6fe5-e753-4487-9808-12b6552eb6e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_8b9a347e-ccec-4994-8093-1ebc7d7f2bc6" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9d6e6fe5-e753-4487-9808-12b6552eb6e9" xlink:to="loc_aal_AirTrafficMember_8b9a347e-ccec-4994-8093-1ebc7d7f2bc6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_af90b2ff-b6bd-4b37-83ea-fc7261cdd929" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9d6e6fe5-e753-4487-9808-12b6552eb6e9" xlink:to="loc_aal_LoyaltyProgramMember_af90b2ff-b6bd-4b37-83ea-fc7261cdd929" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9069fb54-5f87-4725-9bec-c13ce7131894" xlink:to="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:to="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_ff767dae-c3eb-4aca-9ba4-4d14421dde88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_Cash_ff767dae-c3eb-4aca-9ba4-4d14421dde88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_41964530-673f-4c0e-8c9e-095f267d65f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_41964530-673f-4c0e-8c9e-095f267d65f6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_5cabbde8-1006-418c-a222-9838cc830aee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_5cabbde8-1006-418c-a222-9838cc830aee" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_a072d96f-c347-48f8-af1e-660729f68348" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_a072d96f-c347-48f8-af1e-660729f68348" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineRelatedInventoryNet_6883efdb-2999-40ad-be42-baa83dd05f85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineRelatedInventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_AirlineRelatedInventoryNet_6883efdb-2999-40ad-be42-baa83dd05f85" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_4163980d-29a4-4ca2-8e77-b2441f0704c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_4163980d-29a4-4ca2-8e77-b2441f0704c9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_eaf40be0-9230-47ab-9f13-f38fe986364b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_3d37a909-c138-4a5e-b028-0d3cd5cabda7" xlink:to="loc_us-gaap_AssetsCurrent_eaf40be0-9230-47ab-9f13-f38fe986364b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FlightEquipmentGross_c2af2581-5bce-41a3-b35d-13396389287f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FlightEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_us-gaap_FlightEquipmentGross_c2af2581-5bce-41a3-b35d-13396389287f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_GroundPropertyAndEquipmentGross_5163dfae-7540-4538-8c27-abcfc1c2c387" xlink:href="aal-20231231.xsd#aal_GroundPropertyAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_aal_GroundPropertyAndEquipmentGross_5163dfae-7540-4538-8c27-abcfc1c2c387" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsOnFlightEquipment_717d24f5-9bd6-4ee7-95b1-5aa761064c66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepositsOnFlightEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_us-gaap_DepositsOnFlightEquipment_717d24f5-9bd6-4ee7-95b1-5aa761064c66" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_f79661f0-c860-43a7-889b-0604794098f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_f79661f0-c860-43a7-889b-0604794098f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_4d71971f-1d0f-4f9a-8820-b25e095c656c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_4d71971f-1d0f-4f9a-8820-b25e095c656c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_94ec85eb-18f5-4901-ae72-09695990b549" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_fef59df3-b6de-4d18-8674-a242815a1989" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_94ec85eb-18f5-4901-ae72-09695990b549" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_5d8f0c56-d7a2-458c-a16d-a7061904854a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_5d8f0c56-d7a2-458c-a16d-a7061904854a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_628a9c46-c348-474d-84fe-edf7204fe08e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:to="loc_us-gaap_Goodwill_628a9c46-c348-474d-84fe-edf7204fe08e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_adb8465f-38a0-4d4b-8cee-ed432bfc4509" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_adb8465f-38a0-4d4b-8cee-ed432bfc4509" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_82f62649-9e5f-4ee8-aa5d-a0516d8dea28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_82f62649-9e5f-4ee8-aa5d-a0516d8dea28" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_413d311f-cdf0-475a-af20-e0f6a9231c9f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_413d311f-cdf0-475a-af20-e0f6a9231c9f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_bcdec1b8-e39b-4bd3-a11a-b1abdef0e45e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ffb7b429-f1e7-40b4-860c-69c16b932c7f" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_bcdec1b8-e39b-4bd3-a11a-b1abdef0e45e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_0ef88298-e85a-4b3a-a555-91e57fa1c238" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_04b60da5-9dd2-4e9d-bd0e-815730ce991b" xlink:to="loc_us-gaap_Assets_0ef88298-e85a-4b3a-a555-91e57fa1c238" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_9069fb54-5f87-4725-9bec-c13ce7131894" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_df362b95-63a8-4077-ae82-f12f30a2e0df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_df362b95-63a8-4077-ae82-f12f30a2e0df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_8c8baa00-5c06-45a8-9695-5847cbada61f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_AccountsPayableCurrent_8c8baa00-5c06-45a8-9695-5847cbada61f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_255b1080-02ba-4c55-a50e-389cc1f7a89d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_255b1080-02ba-4c55-a50e-389cc1f7a89d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_28ef0d9a-514e-4f22-9765-604b67dcf423" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_28ef0d9a-514e-4f22-9765-604b67dcf423" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_210084cf-8c72-477e-b714-c1f0c875e06f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_210084cf-8c72-477e-b714-c1f0c875e06f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_204348ad-4b0a-4ce8-b69e-07c1cbd74bfe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_204348ad-4b0a-4ce8-b69e-07c1cbd74bfe" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_e04c9da5-b5d0-4f94-a7d7-a2fc60e4c672" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_0377aaa3-39b1-405c-ba01-49e61204afbb" xlink:to="loc_us-gaap_LiabilitiesCurrent_e04c9da5-b5d0-4f94-a7d7-a2fc60e4c672" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_692e59a3-1432-47f1-9c4a-e7581df88ae2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_692e59a3-1432-47f1-9c4a-e7581df88ae2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_c7c069d2-2ee2-4169-9e6c-afd3aaa6641f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_c7c069d2-2ee2-4169-9e6c-afd3aaa6641f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_90c759c6-d228-412d-a50e-1d4f1354225d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_90c759c6-d228-412d-a50e-1d4f1354225d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d2c3d44c-abc5-4a15-80ad-734fd61d1160" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_d2c3d44c-abc5-4a15-80ad-734fd61d1160" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_795008ce-d883-42de-be5b-942d261f24f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_795008ce-d883-42de-be5b-942d261f24f8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_dce57035-db18-40af-bcd4-3f3ea8e488e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_02281c05-b831-46f3-bd82-cf798b9919ba" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_dce57035-db18-40af-bcd4-3f3ea8e488e8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_3d5b7fe6-1ac2-4dfd-84c4-5ae755a921f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:to="loc_us-gaap_CommitmentsAndContingencies_3d5b7fe6-1ac2-4dfd-84c4-5ae755a921f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:to="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_b7e74b68-f924-4871-a230-c818ea439126" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:to="loc_us-gaap_CommonStockValue_b7e74b68-f924-4871-a230-c818ea439126" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_40d462d8-7ecf-4e19-8eac-51dbb5173203" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_40d462d8-7ecf-4e19-8eac-51dbb5173203" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e36027c2-3376-455b-b97d-c972b7a7e6c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e36027c2-3376-455b-b97d-c972b7a7e6c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_6f997220-4ab3-4e81-abc1-30d5d371ec56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_6f997220-4ab3-4e81-abc1-30d5d371ec56" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_e6031331-c2a7-41ae-bf0e-305fea8415a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_43554999-9f58-4151-954b-6eeb95c253f9" xlink:to="loc_us-gaap_StockholdersEquity_e6031331-c2a7-41ae-bf0e-305fea8415a4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_1d2983a3-823f-4250-b01b-658ab64a1c94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_f1b9295e-50a9-4bab-bf66-cf34e67f404d" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_1d2983a3-823f-4250-b01b-658ab64a1c94" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedBalanceSheetsAmericanAirlinesInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8d74da2d-552b-4978-8e86-663a2a9df5aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_960b876c-4477-4a5d-a471-005707299253" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8d74da2d-552b-4978-8e86-663a2a9df5aa" xlink:to="loc_us-gaap_StatementTable_960b876c-4477-4a5d-a471-005707299253" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_960b876c-4477-4a5d-a471-005707299253" xlink:to="loc_dei_LegalEntityAxis_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38" xlink:to="loc_dei_EntityDomain_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b5e583d2-93cd-4f6d-9775-5634ef73fb5f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_870e5b9e-73d7-43b8-b5bc-5a6e32f6ef38" xlink:to="loc_dei_EntityDomain_b5e583d2-93cd-4f6d-9775-5634ef73fb5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_26e9e984-76ba-4376-8ecb-3731c460cf80" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_b5e583d2-93cd-4f6d-9775-5634ef73fb5f" xlink:to="loc_aal_AmericanAirlinesIncMember_26e9e984-76ba-4376-8ecb-3731c460cf80" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_960b876c-4477-4a5d-a471-005707299253" xlink:to="loc_srt_ProductOrServiceAxis_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4" xlink:to="loc_srt_ProductsAndServicesDomain_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cb205f13-b01e-4b82-97fe-a0bfb5187e1a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8d59bde5-41bf-48b7-8b8e-c98b616ad8f4" xlink:to="loc_srt_ProductsAndServicesDomain_cb205f13-b01e-4b82-97fe-a0bfb5187e1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_a160291d-93c9-4c67-90a9-a235a00ad5f7" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cb205f13-b01e-4b82-97fe-a0bfb5187e1a" xlink:to="loc_aal_AirTrafficMember_a160291d-93c9-4c67-90a9-a235a00ad5f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_4f580ccb-626a-454c-be34-4ee4618ad04b" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_cb205f13-b01e-4b82-97fe-a0bfb5187e1a" xlink:to="loc_aal_LoyaltyProgramMember_4f580ccb-626a-454c-be34-4ee4618ad04b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8d74da2d-552b-4978-8e86-663a2a9df5aa" xlink:to="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:to="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_13e181e9-79b8-42c9-b693-3452c742fda2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_Cash_13e181e9-79b8-42c9-b693-3452c742fda2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_901a041e-3758-465e-9219-7cf779cc8ade" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_901a041e-3758-465e-9219-7cf779cc8ade" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_0e288afe-4b1f-4773-8d71-9e3df49d665f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_0e288afe-4b1f-4773-8d71-9e3df49d665f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_85c240eb-5334-4705-949b-757c9a5d4d71" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_85c240eb-5334-4705-949b-757c9a5d4d71" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_57eabb78-9106-4603-bd98-2c915e92f753" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_57eabb78-9106-4603-bd98-2c915e92f753" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineRelatedInventoryNet_05d251cd-1910-4ebf-abe0-6381ce4a1a12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineRelatedInventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_AirlineRelatedInventoryNet_05d251cd-1910-4ebf-abe0-6381ce4a1a12" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_315e75ad-c2e7-41df-a595-ab9414f46ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_315e75ad-c2e7-41df-a595-ab9414f46ccb" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_7c23b7bd-cc9a-4097-afc1-f0d494fcee91" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_f8980408-e7c6-4cd3-8221-c394e257c3a6" xlink:to="loc_us-gaap_AssetsCurrent_7c23b7bd-cc9a-4097-afc1-f0d494fcee91" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FlightEquipmentGross_8e796656-a3b4-467a-be15-ca90fbdce168" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FlightEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_us-gaap_FlightEquipmentGross_8e796656-a3b4-467a-be15-ca90fbdce168" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_GroundPropertyAndEquipmentGross_901791e1-7a9c-4c97-aaba-9106bdb1211a" xlink:href="aal-20231231.xsd#aal_GroundPropertyAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_aal_GroundPropertyAndEquipmentGross_901791e1-7a9c-4c97-aaba-9106bdb1211a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsOnFlightEquipment_b158b100-d7e0-460d-a1e2-b03cd73b5995" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepositsOnFlightEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_us-gaap_DepositsOnFlightEquipment_b158b100-d7e0-460d-a1e2-b03cd73b5995" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_764d4045-b887-4d87-a3c7-7b1958c56f47" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetBeforeAccumulatedDepreciationAndAmortization_764d4045-b887-4d87-a3c7-7b1958c56f47" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_d1854420-ebcb-4f1c-93de-418e16eaca5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAccumulatedDepreciationAndAmortization_d1854420-ebcb-4f1c-93de-418e16eaca5c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_bb293234-9f1e-41a1-bb23-d2c71322c96d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_7bb3c9c3-6146-42b2-8a7f-3220c9fd4659" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization_bb293234-9f1e-41a1-bb23-d2c71322c96d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_b2ead274-41a7-465a-b23c-74a8e1ebb6c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_b2ead274-41a7-465a-b23c-74a8e1ebb6c4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_cf35e3c4-a59e-4b13-a260-971bb48dcd78" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:to="loc_us-gaap_Goodwill_cf35e3c4-a59e-4b13-a260-971bb48dcd78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_ac8117cc-0ae6-4dbe-bee1-7546ce4eb9d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_ac8117cc-0ae6-4dbe-bee1-7546ce4eb9d7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_35d745ef-0a36-4c84-9d10-2615fe3c23ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_35d745ef-0a36-4c84-9d10-2615fe3c23ea" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_5d650f50-33b4-43a2-a484-3f965ab6a6ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_5d650f50-33b4-43a2-a484-3f965ab6a6ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_e1ed9d0b-9131-47ed-bebd-8cf12bfdb006" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_ca477287-e0be-4c88-a5a5-cf598c047571" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_e1ed9d0b-9131-47ed-bebd-8cf12bfdb006" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_0811962f-5531-46bb-936e-55015d1bf223" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2ca44341-5afb-446c-b473-c19d6d772fd5" xlink:to="loc_us-gaap_Assets_0811962f-5531-46bb-936e-55015d1bf223" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8d74da2d-552b-4978-8e86-663a2a9df5aa" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_cff59d8f-758f-40fe-b037-c826d310f8de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_cff59d8f-758f-40fe-b037-c826d310f8de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_825be5b4-17fb-414d-8ff7-9dda9773c79c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_AccountsPayableCurrent_825be5b4-17fb-414d-8ff7-9dda9773c79c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_6bb1c630-eef4-4900-a82c-4bebc1f5a70d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_6bb1c630-eef4-4900-a82c-4bebc1f5a70d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_854954b2-ada2-4aef-a7df-cacd8e8fa6dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_854954b2-ada2-4aef-a7df-cacd8e8fa6dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_8c19da7a-661f-4a35-9652-434db58eb0bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_8c19da7a-661f-4a35-9652-434db58eb0bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_d763bd67-97e1-4efc-9006-bd493c9ec9eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_d763bd67-97e1-4efc-9006-bd493c9ec9eb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_0f863ab8-621b-452e-aa35-025239d7b340" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_c77a3b7e-a65e-4199-85f7-03dfa74bb66f" xlink:to="loc_us-gaap_LiabilitiesCurrent_0f863ab8-621b-452e-aa35-025239d7b340" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesNoncurrentAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_f716d73f-0960-4ddc-b572-df6438be3aea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_f716d73f-0960-4ddc-b572-df6438be3aea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1ca21c62-3e21-4d71-87ee-ab814c09352d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_1ca21c62-3e21-4d71-87ee-ab814c09352d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_f5b1d301-6e00-4a28-9488-bb8551b6393d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_f5b1d301-6e00-4a28-9488-bb8551b6393d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_359f1ef1-97f5-4280-8139-06070ef8d693" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_359f1ef1-97f5-4280-8139-06070ef8d693" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_4a034c03-461f-4165-a35a-784444c29bc0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_4a034c03-461f-4165-a35a-784444c29bc0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_aa1d0afa-34c8-4a17-8c99-21b92602fa6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_2fe133d9-b43f-4ab1-a4df-e8e88d10d70b" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_aa1d0afa-34c8-4a17-8c99-21b92602fa6b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_553c7c7f-6d01-40f6-b79c-3ca254f92a1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:to="loc_us-gaap_CommitmentsAndContingencies_553c7c7f-6d01-40f6-b79c-3ca254f92a1e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:to="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_cb5528f9-2954-4c9c-b9cc-2f6908548bc2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:to="loc_us-gaap_CommonStockValue_cb5528f9-2954-4c9c-b9cc-2f6908548bc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_91d97d1d-9180-436f-bac4-850414323fec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_91d97d1d-9180-436f-bac4-850414323fec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_533ee121-13c7-43f5-815d-335bb10024fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_533ee121-13c7-43f5-815d-335bb10024fd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_920206fa-74b7-49cb-8192-12cc49b7ea11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_920206fa-74b7-49cb-8192-12cc49b7ea11" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_88dcc28e-e5ed-47d4-9872-e0437714db9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_56407696-2513-4879-a54a-226af0301750" xlink:to="loc_us-gaap_StockholdersEquity_88dcc28e-e5ed-47d4-9872-e0437714db9a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_25a6b501-6cbf-4f88-b2a7-9fcef0508199" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_738aa6a7-0707-4372-b23b-317bfc16e1a0" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_25a6b501-6cbf-4f88-b2a7-9fcef0508199" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesIncParenthetical" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedBalanceSheetsAmericanAirlinesIncParenthetical"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedBalanceSheetsAmericanAirlinesIncParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_690927a3-fcfb-420b-9331-7c4736526101" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_StatementTable_690927a3-fcfb-420b-9331-7c4736526101" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_3036bcad-3a42-4da9-9763-b1a48c776d27" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_690927a3-fcfb-420b-9331-7c4736526101" xlink:to="loc_dei_LegalEntityAxis_3036bcad-3a42-4da9-9763-b1a48c776d27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3036bcad-3a42-4da9-9763-b1a48c776d27_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3036bcad-3a42-4da9-9763-b1a48c776d27" xlink:to="loc_dei_EntityDomain_3036bcad-3a42-4da9-9763-b1a48c776d27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_dd0eb475-7b29-46bb-aa12-26c64d1a1a15" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3036bcad-3a42-4da9-9763-b1a48c776d27" xlink:to="loc_dei_EntityDomain_dd0eb475-7b29-46bb-aa12-26c64d1a1a15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_e83f2be7-dd03-49b3-b52c-193180ee5b71" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_dd0eb475-7b29-46bb-aa12-26c64d1a1a15" xlink:to="loc_aal_AmericanAirlinesIncMember_e83f2be7-dd03-49b3-b52c-193180ee5b71" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a8a452d8-653e-4d42-a6e0-a2c8ea54f3ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_a8a452d8-653e-4d42-a6e0-a2c8ea54f3ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_fea6479e-1c33-4bf4-bd55-01b73ab90955" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_fea6479e-1c33-4bf4-bd55-01b73ab90955" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_ae6d3d89-de50-456d-b324-de9a0b70bed1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_ae6d3d89-de50-456d-b324-de9a0b70bed1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_7da6fb7b-b4e7-4ed3-aa1d-157715553366" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_CommonStockSharesIssued_7da6fb7b-b4e7-4ed3-aa1d-157715553366" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_11f7985b-a703-4259-893d-c495c54c66c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_c62abfae-8777-45d0-adea-cdebdd95b4a0" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_11f7985b-a703-4259-893d-c495c54c66c5" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesGroupInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofCashFlowsAmericanAirlinesGroupInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesGroupInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_35a7411a-ad70-43c6-87ae-294a8217c707" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_StatementTable_35a7411a-ad70-43c6-87ae-294a8217c707" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_b912a9fd-df77-4a1d-871e-682458fcbaf4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_35a7411a-ad70-43c6-87ae-294a8217c707" xlink:to="loc_srt_ProductOrServiceAxis_b912a9fd-df77-4a1d-871e-682458fcbaf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b912a9fd-df77-4a1d-871e-682458fcbaf4_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_b912a9fd-df77-4a1d-871e-682458fcbaf4" xlink:to="loc_srt_ProductsAndServicesDomain_b912a9fd-df77-4a1d-871e-682458fcbaf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_3873211b-f8f1-49d0-898a-2889779c4021" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_b912a9fd-df77-4a1d-871e-682458fcbaf4" xlink:to="loc_srt_ProductsAndServicesDomain_3873211b-f8f1-49d0-898a-2889779c4021" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_832cc9e2-6030-4be9-8efa-73e86506ac95" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3873211b-f8f1-49d0-898a-2889779c4021" xlink:to="loc_aal_AirTrafficMember_832cc9e2-6030-4be9-8efa-73e86506ac95" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_2ef3fd34-6d1e-4252-89d1-fb562754b793" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_3873211b-f8f1-49d0-898a-2889779c4021" xlink:to="loc_aal_LoyaltyProgramMember_2ef3fd34-6d1e-4252-89d1-fb562754b793" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_bbaa2176-e545-4e96-9fa9-8805c0034c8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:to="loc_us-gaap_NetIncomeLoss_bbaa2176-e545-4e96-9fa9-8805c0034c8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MainlineAndExpressDepreciationAndAmortization_5e9a4143-9115-4668-86bc-8451f4316fd2" xlink:href="aal-20231231.xsd#aal_MainlineAndExpressDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_aal_MainlineAndExpressDepreciationAndAmortization_5e9a4143-9115-4668-86bc-8451f4316fd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_282b323f-65be-4ccc-91a6-5777b4542c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_282b323f-65be-4ccc-91a6-5777b4542c1b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialChargesNonCash_e4ead18d-59a8-4043-b35f-f2b8115959d9" xlink:href="aal-20231231.xsd#aal_SpecialChargesNonCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_aal_SpecialChargesNonCash_e4ead18d-59a8-4043-b35f-f2b8115959d9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_9aac0acc-e026-4fc9-adb3-5776faced8d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_9aac0acc-e026-4fc9-adb3-5776faced8d8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fc68710b-16ab-4431-93f1-06c32cd71184" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fc68710b-16ab-4431-93f1-06c32cd71184" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_ad53d309-06a1-4e16-876d-f2d97b24f921" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_us-gaap_ShareBasedCompensation_ad53d309-06a1-4e16-876d-f2d97b24f921" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_88c27dec-7bf5-4da1-b576-2fa0e2480c8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_a9c94cb3-f29e-400d-bec5-1cfb637ad616" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_88c27dec-7bf5-4da1-b576-2fa0e2480c8e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_084e99ba-d689-4daa-b3ae-90ac0475a18a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_084e99ba-d689-4daa-b3ae-90ac0475a18a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_234984e0-df9b-42d4-b381-393e74a9044b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_234984e0-df9b-42d4-b381-393e74a9044b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_afdcb633-b787-4321-81d2-dfa59d6d6b01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_afdcb633-b787-4321-81d2-dfa59d6d6b01" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_44c52e33-b171-4940-8e71-cb0a94750d88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_44c52e33-b171-4940-8e71-cb0a94750d88" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_e6a0cdcc-9c17-446e-b60b-e15d2c698815" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInPensionPlanObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_e6a0cdcc-9c17-446e-b60b-e15d2c698815" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b3c6a36a-70f1-4950-97b6-621c7ca4ea7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_d555c214-70da-4316-9294-d981b22a433e" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_b3c6a36a-70f1-4950-97b6-621c7ca4ea7b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_4acadc8d-adf4-40a8-8e94-67c30667d2e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_55dddf14-f29a-43cc-add4-eee2ccacaf36" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_4acadc8d-adf4-40a8-8e94-67c30667d2e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_45ef3305-3dc9-46ee-9e1e-9dc34a708941" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_45ef3305-3dc9-46ee-9e1e-9dc34a708941" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions_e909099d-9dd5-4f7e-9998-a7f860b819df" xlink:href="aal-20231231.xsd#aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions_e909099d-9dd5-4f7e-9998-a7f860b819df" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_be2467b5-b16b-410a-a239-c30df6e5f786" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_be2467b5-b16b-410a-a239-c30df6e5f786" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_071a5c05-802e-4b91-88e7-64f5cb921a1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_071a5c05-802e-4b91-88e7-64f5cb921a1d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_0bef1e37-adee-4c1e-9a5d-05df5f906592" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseOfRestrictedInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_0bef1e37-adee-4c1e-9a5d-05df5f906592" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_1e190105-3d80-4fb4-a9ee-66d25f6b456e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireEquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_1e190105-3d80-4fb4-a9ee-66d25f6b456e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_4182177e-fd9f-4d84-b7fd-6fd254e261cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_4182177e-fd9f-4d84-b7fd-6fd254e261cc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_df41301d-fc8b-45c3-8505-ddf5435679a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_d3f542ca-b3df-4ffb-9b61-e34de253d81d" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_df41301d-fc8b-45c3-8505-ddf5435679a1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_4ffe9164-40cb-4766-91ea-8292ddc34405" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_4ffe9164-40cb-4766-91ea-8292ddc34405" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_e28fb131-63e6-4dcd-bc34-40fc1f33ba3f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_e28fb131-63e6-4dcd-bc34-40fc1f33ba3f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_c1da7b18-bca9-4692-bcfd-e9319df9e02e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:to="loc_us-gaap_ProceedsFromIssuanceOrSaleOfEquity_c1da7b18-bca9-4692-bcfd-e9319df9e02e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f1c266a0-82f3-4dff-8c2a-93e5b90c8c37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f1c266a0-82f3-4dff-8c2a-93e5b90c8c37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_98a72729-7860-4ee2-ad36-a56b2210ce53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_e56921c6-4a46-4ea9-a1b9-67154e7e0f41" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_98a72729-7860-4ee2-ad36-a56b2210ce53" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_70cfbfdd-601d-4944-9f93-5466ca0ea689" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_70cfbfdd-601d-4944-9f93-5466ca0ea689" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_b72ecbc7-ec3d-4669-894d-ce695b3c987c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_a879648f-2639-4b00-bc91-2b0b08413959" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_b72ecbc7-ec3d-4669-894d-ce695b3c987c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_4fd4f1da-8f71-43b8-b262-a10efe268053" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofCashFlowsAmericanAirlinesInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_1862622c-4248-4247-a5a4-2ff92bdf3d9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_StatementTable_1862622c-4248-4247-a5a4-2ff92bdf3d9b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_cae721f4-3d0d-4179-9f75-46950538b37e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1862622c-4248-4247-a5a4-2ff92bdf3d9b" xlink:to="loc_srt_ProductOrServiceAxis_cae721f4-3d0d-4179-9f75-46950538b37e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_cae721f4-3d0d-4179-9f75-46950538b37e_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_cae721f4-3d0d-4179-9f75-46950538b37e" xlink:to="loc_srt_ProductsAndServicesDomain_cae721f4-3d0d-4179-9f75-46950538b37e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_56624617-bd29-4ad0-8473-365cda1f515f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_cae721f4-3d0d-4179-9f75-46950538b37e" xlink:to="loc_srt_ProductsAndServicesDomain_56624617-bd29-4ad0-8473-365cda1f515f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_57af36f7-80cb-4a2b-b6b3-2964582a9f8f" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_56624617-bd29-4ad0-8473-365cda1f515f" xlink:to="loc_aal_AirTrafficMember_57af36f7-80cb-4a2b-b6b3-2964582a9f8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_1e1fdd07-39fb-42a4-820f-9ab4d41ae6ef" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_56624617-bd29-4ad0-8473-365cda1f515f" xlink:to="loc_aal_LoyaltyProgramMember_1e1fdd07-39fb-42a4-820f-9ab4d41ae6ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_9edf689b-5517-40e1-8f42-adb0020a0d5c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_1862622c-4248-4247-a5a4-2ff92bdf3d9b" xlink:to="loc_dei_LegalEntityAxis_9edf689b-5517-40e1-8f42-adb0020a0d5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9edf689b-5517-40e1-8f42-adb0020a0d5c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_9edf689b-5517-40e1-8f42-adb0020a0d5c" xlink:to="loc_dei_EntityDomain_9edf689b-5517-40e1-8f42-adb0020a0d5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_54b3d3d5-7f74-48bf-aa18-c2e137540681" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_9edf689b-5517-40e1-8f42-adb0020a0d5c" xlink:to="loc_dei_EntityDomain_54b3d3d5-7f74-48bf-aa18-c2e137540681" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_aad92ec5-1002-4050-aa2d-aec4ac2458ff" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_54b3d3d5-7f74-48bf-aa18-c2e137540681" xlink:to="loc_aal_AmericanAirlinesIncMember_aad92ec5-1002-4050-aa2d-aec4ac2458ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_44deacfc-6639-4595-b9dd-c6c6bafecc9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:to="loc_us-gaap_NetIncomeLoss_44deacfc-6639-4595-b9dd-c6c6bafecc9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MainlineAndExpressDepreciationAndAmortization_27883d90-5bd1-4b21-9d39-ef16c9517292" xlink:href="aal-20231231.xsd#aal_MainlineAndExpressDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_aal_MainlineAndExpressDepreciationAndAmortization_27883d90-5bd1-4b21-9d39-ef16c9517292" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_087ebb12-3aa4-448b-8ac9-b25b2aa72dea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_087ebb12-3aa4-448b-8ac9-b25b2aa72dea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialChargesNonCash_0702a631-d76a-4ab0-b006-bdd17545ecaa" xlink:href="aal-20231231.xsd#aal_SpecialChargesNonCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_aal_SpecialChargesNonCash_0702a631-d76a-4ab0-b006-bdd17545ecaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_91bb0786-fe8e-416a-9b5a-146134f83ce2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_91bb0786-fe8e-416a-9b5a-146134f83ce2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fa55c39c-76fa-4755-87e9-893094a1fbf0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_fa55c39c-76fa-4755-87e9-893094a1fbf0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_3f43661d-316d-42c7-8364-1d4544da65df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_us-gaap_ShareBasedCompensation_3f43661d-316d-42c7-8364-1d4544da65df" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_059b7f50-c9df-4e65-9e54-f10b5ee6818f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_3032b9dd-ca7d-4da6-afa5-5c096b5285ce" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_059b7f50-c9df-4e65-9e54-f10b5ee6818f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_af3f9e44-30df-43fe-ba9a-6bcefbf5fa18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_af3f9e44-30df-43fe-ba9a-6bcefbf5fa18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_9daceab7-6958-4950-9154-5fff0ca23977" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_9daceab7-6958-4950-9154-5fff0ca23977" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5846af83-a99e-4d25-bc0e-cbd2476405b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_5846af83-a99e-4d25-bc0e-cbd2476405b3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_85528d80-7d05-47dc-8f4d-f945b42775f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_85528d80-7d05-47dc-8f4d-f945b42775f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_46570a3e-e01f-45b8-8cdc-9690e2955c11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInDueFromRelatedParties"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_46570a3e-e01f-45b8-8cdc-9690e2955c11" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_1973d1ee-3ae0-44e5-950d-cc756bb623b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInPensionPlanObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_1973d1ee-3ae0-44e5-950d-cc756bb623b9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_79a42b4c-31bf-4a25-bf67-cabac014f110" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_4d111d18-9653-4cf0-a3fb-7a4acb673db2" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_79a42b4c-31bf-4a25-bf67-cabac014f110" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3bbe9ce8-f034-4f40-a4d7-f42ca25c0076" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_dccc0845-97d9-4af9-b069-a0c2eef0538f" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_3bbe9ce8-f034-4f40-a4d7-f42ca25c0076" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_3bcf3dee-f47f-47fb-97df-969da8db9808" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireProductiveAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_3bcf3dee-f47f-47fb-97df-969da8db9808" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions_cd433847-1d9d-4d97-b1e7-4432ae3d7b59" xlink:href="aal-20231231.xsd#aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeasebackTransactions_cd433847-1d9d-4d97-b1e7-4432ae3d7b59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_b816afb6-5fa1-423e-a087-fcc9eb4b5107" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_b816afb6-5fa1-423e-a087-fcc9eb4b5107" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_a2609e10-d9ac-4fb6-b4c5-21d258fb0d7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_a2609e10-d9ac-4fb6-b4c5-21d258fb0d7b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_162f9e16-0038-470e-9031-3e370c95cd10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseOfRestrictedInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_IncreaseDecreaseOfRestrictedInvestments_162f9e16-0038-470e-9031-3e370c95cd10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_551d02c1-2954-493e-9001-624e03ed301d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireEquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_PaymentsToAcquireEquitySecuritiesFvNi_551d02c1-2954-493e-9001-624e03ed301d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_8810364c-c725-46c8-8279-a0dd45b9bf5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_8810364c-c725-46c8-8279-a0dd45b9bf5c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ef09f9e3-7729-4a87-ad89-c3eec9ab002b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_c3ee9a9e-a345-498c-a458-7b15942c7b50" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_ef09f9e3-7729-4a87-ad89-c3eec9ab002b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_bef54213-1f66-4831-8e91-cc8936c23241" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_bef54213-1f66-4831-8e91-cc8936c23241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_759962e4-84d7-4de2-88bd-defdca6ec992" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_759962e4-84d7-4de2-88bd-defdca6ec992" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f9bb249a-7d40-47b0-abd1-d5e4759ea9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_f9bb249a-7d40-47b0-abd1-d5e4759ea9dc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_a109b0e0-4a7d-4179-8977-475560b2144e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_a311f010-760b-4eb7-a13d-d9e1bf7ab311" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_a109b0e0-4a7d-4179-8977-475560b2144e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_6b982c44-0c30-4a26-8d1b-d00e35efea1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_6b982c44-0c30-4a26-8d1b-d00e35efea1d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_492ff5c5-305e-4c94-b131-d197421de6a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_72118edb-b8b0-4870-b91c-997e7aa6e856" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_492ff5c5-305e-4c94-b131-d197421de6a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_34a94b06-7891-4a21-951d-7b40ea5eb83c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesIncParenthetical" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofCashFlowsAmericanAirlinesIncParenthetical"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofCashFlowsAmericanAirlinesIncParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_dfccac02-e1cb-468b-8883-13477cc332b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_5afb4802-80ac-4946-87d8-5f1b4aa0f581" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_dfccac02-e1cb-468b-8883-13477cc332b0" xlink:to="loc_us-gaap_StatementTable_5afb4802-80ac-4946-87d8-5f1b4aa0f581" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5afb4802-80ac-4946-87d8-5f1b4aa0f581" xlink:to="loc_dei_LegalEntityAxis_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890" xlink:to="loc_dei_EntityDomain_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_875b5b20-d239-4859-9daf-4c43c3d0081a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7dc8bafd-119a-44f6-bbe3-12fd5c3d4890" xlink:to="loc_dei_EntityDomain_875b5b20-d239-4859-9daf-4c43c3d0081a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f26de569-5ac4-4cb7-98ae-5539e1bfcd28" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_875b5b20-d239-4859-9daf-4c43c3d0081a" xlink:to="loc_aal_AmericanAirlinesIncMember_f26de569-5ac4-4cb7-98ae-5539e1bfcd28" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_cdfd687f-171c-4ec0-aad8-14d7a7497924" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Cash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_dfccac02-e1cb-468b-8883-13477cc332b0" xlink:to="loc_us-gaap_Cash_cdfd687f-171c-4ec0-aad8-14d7a7497924" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_0c2366b5-c8cb-4eaf-b590-1cd917c137bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_dfccac02-e1cb-468b-8883-13477cc332b0" xlink:to="loc_us-gaap_RestrictedCashCurrent_0c2366b5-c8cb-4eaf-b590-1cd917c137bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_43edb263-549f-43c2-a1da-a5ba2f730f5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_dfccac02-e1cb-468b-8883-13477cc332b0" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_43edb263-549f-43c2-a1da-a5ba2f730f5a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_f7fbd01f-7cbb-492c-91cc-37de589f2d52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_f7fbd01f-7cbb-492c-91cc-37de589f2d52" xlink:to="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f" xlink:to="loc_us-gaap_EquityComponentDomain_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c76825a8-fab9-4622-9d2d-fc2cf2bf7e9f" xlink:to="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_5b33006b-8abe-4e0d-b1da-42ecd123af89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:to="loc_us-gaap_CommonStockMember_5b33006b-8abe-4e0d-b1da-42ecd123af89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_74487500-551b-43b3-abaa-8ba6d1d17603" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_74487500-551b-43b3-abaa-8ba6d1d17603" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_cfac9313-ec27-4a69-9536-8813dc1caae3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_cfac9313-ec27-4a69-9536-8813dc1caae3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_b61ba74c-0dcf-4067-b96c-c8f954092235" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_c9dfa059-9bfc-4d6c-b6be-e139ca880d1a" xlink:to="loc_us-gaap_RetainedEarningsMember_b61ba74c-0dcf-4067-b96c-c8f954092235" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightAxis_713dcb69-4fb6-402e-a13f-304f8e891df0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfWarrantOrRightAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:to="loc_us-gaap_ClassOfWarrantOrRightAxis_713dcb69-4fb6-402e-a13f-304f8e891df0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_713dcb69-4fb6-402e-a13f-304f8e891df0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_713dcb69-4fb6-402e-a13f-304f8e891df0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_713dcb69-4fb6-402e-a13f-304f8e891df0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightDomain_a98eb2c9-c1c5-4f0c-9dd2-176c3246c7e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfWarrantOrRightDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ClassOfWarrantOrRightAxis_713dcb69-4fb6-402e-a13f-304f8e891df0" xlink:to="loc_us-gaap_ClassOfWarrantOrRightDomain_a98eb2c9-c1c5-4f0c-9dd2-176c3246c7e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramTwoAndThreeWarrantsCARESActMember_21a77c26-e1bc-4edf-aee0-2c67c2f40498" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramTwoAndThreeWarrantsCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfWarrantOrRightDomain_a98eb2c9-c1c5-4f0c-9dd2-176c3246c7e7" xlink:to="loc_aal_PayrollSupportProgramTwoAndThreeWarrantsCARESActMember_21a77c26-e1bc-4edf-aee0-2c67c2f40498" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_c933e352-e6d9-434e-8e9b-13a0927ef9f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_c933e352-e6d9-434e-8e9b-13a0927ef9f0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_c933e352-e6d9-434e-8e9b-13a0927ef9f0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_c933e352-e6d9-434e-8e9b-13a0927ef9f0" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_c933e352-e6d9-434e-8e9b-13a0927ef9f0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_12836ef9-cfb7-4c35-9338-c4b564e0f78b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_c933e352-e6d9-434e-8e9b-13a0927ef9f0" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_12836ef9-cfb7-4c35-9338-c4b564e0f78b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AtTheMarketOfferingMember_7664dd66-b898-41d2-becf-1062cbb83491" xlink:href="aal-20231231.xsd#aal_AtTheMarketOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_12836ef9-cfb7-4c35-9338-c4b564e0f78b" xlink:to="loc_aal_AtTheMarketOfferingMember_7664dd66-b898-41d2-becf-1062cbb83491" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4993b412-9c93-4de4-a445-a564aa1c9927" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c4140fb4-c6bb-4c4d-92e5-36fb0c452b76" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4993b412-9c93-4de4-a445-a564aa1c9927" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4993b412-9c93-4de4-a445-a564aa1c9927_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4993b412-9c93-4de4-a445-a564aa1c9927" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4993b412-9c93-4de4-a445-a564aa1c9927_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_75e0a952-a321-4aab-852d-6b3e216cd013" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4993b412-9c93-4de4-a445-a564aa1c9927" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_75e0a952-a321-4aab-852d-6b3e216cd013" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_27e9d71a-309a-4eca-b319-7f40ee3419a7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_75e0a952-a321-4aab-852d-6b3e216cd013" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_27e9d71a-309a-4eca-b319-7f40ee3419a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_f7fbd01f-7cbb-492c-91cc-37de589f2d52" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_5a1eea56-01bb-4688-ac45-bfead0086d27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_StockholdersEquity_5a1eea56-01bb-4688-ac45-bfead0086d27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_a7b0b696-5dde-4d6f-ab76-44c0624f851f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_NetIncomeLoss_a7b0b696-5dde-4d6f-ab76-44c0624f851f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b36483e2-71c7-4db3-ba70-d2beef839504" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_b36483e2-71c7-4db3-ba70-d2beef839504" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_f1c60412-d62b-4f0f-8048-15cef567725b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_f1c60412-d62b-4f0f-8048-15cef567725b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdateExtensibleList_e509138b-d915-4764-bb29-ffcdcd8530f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountingStandardsUpdateExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_AccountingStandardsUpdateExtensibleList_e509138b-d915-4764-bb29-ffcdcd8530f8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f91073d7-c24d-4473-a319-93adb7324e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_632b7450-f0b1-4a61-be2c-f1b031864d1b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalWarrantIssued_632b7450-f0b1-4a61-be2c-f1b031864d1b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_9242c9df-e464-45c2-a5f9-564856e9c2e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_9242c9df-e464-45c2-a5f9-564856e9c2e9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_52be69b6-8045-426e-81cb-ffe99aedde0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_52be69b6-8045-426e-81cb-ffe99aedde0a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaimsAndRetirementOfCommonStock_816d5fec-d613-44ad-8b99-4ff5ced99bb5" xlink:href="aal-20231231.xsd#aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaimsAndRetirementOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_277b5783-2cfb-4dba-b7e0-3ee046c46985" xlink:to="loc_aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaimsAndRetirementOfCommonStock_816d5fec-d613-44ad-8b99-4ff5ced99bb5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_b403c5f6-553d-4a0f-a284-47241d238226" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupIncParenthetical" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupIncParenthetical"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityDeficitAmericanAirlinesGroupIncParenthetical" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8d2b779a-4344-4001-88ff-59c35af7d771" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_29469d76-00c4-4973-b72e-c5547d457dcc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8d2b779a-4344-4001-88ff-59c35af7d771" xlink:to="loc_us-gaap_StatementTable_29469d76-00c4-4973-b72e-c5547d457dcc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiarySaleOfStockAxis_05e61bcc-d553-4f42-a570-3ce12ad0e387" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsidiarySaleOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_29469d76-00c4-4973-b72e-c5547d457dcc" xlink:to="loc_us-gaap_SubsidiarySaleOfStockAxis_05e61bcc-d553-4f42-a570-3ce12ad0e387" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_05e61bcc-d553-4f42-a570-3ce12ad0e387_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_05e61bcc-d553-4f42-a570-3ce12ad0e387" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_05e61bcc-d553-4f42-a570-3ce12ad0e387_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1b8ba6cc-09bf-4ae1-bb8a-2900090a7be0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleOfStockNameOfTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsidiarySaleOfStockAxis_05e61bcc-d553-4f42-a570-3ce12ad0e387" xlink:to="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1b8ba6cc-09bf-4ae1-bb8a-2900090a7be0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AtTheMarketOfferingMember_f8b123b6-a999-40ca-a9d7-7d8bc9ab79ec" xlink:href="aal-20231231.xsd#aal_AtTheMarketOfferingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SaleOfStockNameOfTransactionDomain_1b8ba6cc-09bf-4ae1-bb8a-2900090a7be0" xlink:to="loc_aal_AtTheMarketOfferingMember_f8b123b6-a999-40ca-a9d7-7d8bc9ab79ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_6af11ec9-b8d3-49e4-95d4-6c3d41463645" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8d2b779a-4344-4001-88ff-59c35af7d771" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesNewIssues_6af11ec9-b8d3-49e4-95d4-6c3d41463645" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_032d1dd4-dcf0-4c3e-9c7f-69c7bd414792" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8d2b779a-4344-4001-88ff-59c35af7d771" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_032d1dd4-dcf0-4c3e-9c7f-69c7bd414792" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_b00aa54f-c0da-4222-9624-9a4df66ca332" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockSharesRetired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8d2b779a-4344-4001-88ff-59c35af7d771" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_b00aa54f-c0da-4222-9624-9a4df66ca332" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityAmericanAirlinesInc" xlink:type="simple" xlink:href="aal-20231231.xsd#ConsolidatedStatementsofStockholdersEquityAmericanAirlinesInc"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsofStockholdersEquityAmericanAirlinesInc" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8c084fa5-59b1-4af2-80a3-087e534970d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_c07f21e1-3949-4b4d-a1c9-83e0785241ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8c084fa5-59b1-4af2-80a3-087e534970d4" xlink:to="loc_us-gaap_StatementTable_c07f21e1-3949-4b4d-a1c9-83e0785241ab" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_189da3c2-16f1-456b-a9a6-be7d7b76c1f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c07f21e1-3949-4b4d-a1c9-83e0785241ab" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_189da3c2-16f1-456b-a9a6-be7d7b76c1f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_189da3c2-16f1-456b-a9a6-be7d7b76c1f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_189da3c2-16f1-456b-a9a6-be7d7b76c1f2" xlink:to="loc_us-gaap_EquityComponentDomain_189da3c2-16f1-456b-a9a6-be7d7b76c1f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_189da3c2-16f1-456b-a9a6-be7d7b76c1f2" xlink:to="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_b3d2b6d3-2467-40d5-8e05-7962abc417fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:to="loc_us-gaap_CommonStockMember_b3d2b6d3-2467-40d5-8e05-7962abc417fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_58ba46b7-9e3b-493b-b18f-d133984e6903" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_58ba46b7-9e3b-493b-b18f-d133984e6903" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_57d5d876-229d-429b-aecd-aa3006a9bdec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_57d5d876-229d-429b-aecd-aa3006a9bdec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_d484282c-ca69-41a9-b6c9-7e54af70fb23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_763580d5-6b42-428c-a3a3-a33403366e89" xlink:to="loc_us-gaap_RetainedEarningsMember_d484282c-ca69-41a9-b6c9-7e54af70fb23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_a4cbc543-d6a5-4fae-be70-190793d6c93b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_c07f21e1-3949-4b4d-a1c9-83e0785241ab" xlink:to="loc_dei_LegalEntityAxis_a4cbc543-d6a5-4fae-be70-190793d6c93b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a4cbc543-d6a5-4fae-be70-190793d6c93b_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_a4cbc543-d6a5-4fae-be70-190793d6c93b" xlink:to="loc_dei_EntityDomain_a4cbc543-d6a5-4fae-be70-190793d6c93b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_990d8a88-28d4-4bff-9538-0d68982f64be" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_a4cbc543-d6a5-4fae-be70-190793d6c93b" xlink:to="loc_dei_EntityDomain_990d8a88-28d4-4bff-9538-0d68982f64be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_24ce82c4-4229-4a4d-9ac5-c796fa285624" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_990d8a88-28d4-4bff-9538-0d68982f64be" xlink:to="loc_aal_AmericanAirlinesIncMember_24ce82c4-4229-4a4d-9ac5-c796fa285624" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8c084fa5-59b1-4af2-80a3-087e534970d4" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_fa55033b-cb6d-428d-93ca-b6c756235f8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:to="loc_us-gaap_StockholdersEquity_fa55033b-cb6d-428d-93ca-b6c756235f8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_c3ce4115-8dea-46d7-a2b3-4c2aad80c93a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:to="loc_us-gaap_NetIncomeLoss_c3ce4115-8dea-46d7-a2b3-4c2aad80c93a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c5f760a0-333a-4de0-85b7-4b6e62e9ac8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_c5f760a0-333a-4de0-85b7-4b6e62e9ac8b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4dfc222e-6804-4a70-9bc6-6f6c64c540f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4dfc222e-6804-4a70-9bc6-6f6c64c540f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_IntercompanyEquityTransfer_02f23ed5-8e4a-48a8-a4bb-195494048f20" xlink:href="aal-20231231.xsd#aal_IntercompanyEquityTransfer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_50bbf5ab-da4f-4215-a1db-913c97a15534" xlink:to="loc_aal_IntercompanyEquityTransfer_02f23ed5-8e4a-48a8-a4bb-195494048f20" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_6111062b-d446-4cc1-93bc-d7c74cccb883" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPolicies"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_2f3a11b9-d0ff-4893-a885-35a6764e2f0f" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_a7659bd3-d3eb-4a09-8802-3c3fb12921ba" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_2f3a11b9-d0ff-4893-a885-35a6764e2f0f" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_a7659bd3-d3eb-4a09-8802-3c3fb12921ba" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_8a2c5f17-1145-41d0-b915-75335424f423" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_a7659bd3-d3eb-4a09-8802-3c3fb12921ba" xlink:to="loc_dei_LegalEntityAxis_8a2c5f17-1145-41d0-b915-75335424f423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8a2c5f17-1145-41d0-b915-75335424f423_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8a2c5f17-1145-41d0-b915-75335424f423" xlink:to="loc_dei_EntityDomain_8a2c5f17-1145-41d0-b915-75335424f423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_792a4374-a218-4149-b1a1-60797b0862ad" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8a2c5f17-1145-41d0-b915-75335424f423" xlink:to="loc_dei_EntityDomain_792a4374-a218-4149-b1a1-60797b0862ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_48a9c128-139b-4d2e-b708-91577796830a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_792a4374-a218-4149-b1a1-60797b0862ad" xlink:to="loc_aal_AmericanAirlinesIncMember_48a9c128-139b-4d2e-b708-91577796830a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_232ea338-5856-486a-96fa-96e7b602bc61" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_2f3a11b9-d0ff-4893-a885-35a6764e2f0f" xlink:to="loc_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_232ea338-5856-486a-96fa-96e7b602bc61" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsNet" xlink:type="simple" xlink:href="aal-20231231.xsd#SpecialItemsNet"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsNet" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_7bb5b41f-13da-4ea7-aacb-c3c6b7217173" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15de39b1-d498-4407-9e95-9322907379ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7bb5b41f-13da-4ea7-aacb-c3c6b7217173" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15de39b1-d498-4407-9e95-9322907379ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_759640b8-7620-4252-9f92-225e3fbae82c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_15de39b1-d498-4407-9e95-9322907379ce" xlink:to="loc_dei_LegalEntityAxis_759640b8-7620-4252-9f92-225e3fbae82c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_759640b8-7620-4252-9f92-225e3fbae82c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_759640b8-7620-4252-9f92-225e3fbae82c" xlink:to="loc_dei_EntityDomain_759640b8-7620-4252-9f92-225e3fbae82c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e350b090-5a11-4c4c-8d05-5ecd98567e2f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_759640b8-7620-4252-9f92-225e3fbae82c" xlink:to="loc_dei_EntityDomain_e350b090-5a11-4c4c-8d05-5ecd98567e2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_61400e42-2214-45c5-92de-749eb5770061" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e350b090-5a11-4c4c-8d05-5ecd98567e2f" xlink:to="loc_aal_AmericanAirlinesIncMember_61400e42-2214-45c5-92de-749eb5770061" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_b69d4b25-9d1a-44f0-9287-d12fa8eaff1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_7bb5b41f-13da-4ea7-aacb-c3c6b7217173" xlink:to="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_b69d4b25-9d1a-44f0-9287-d12fa8eaff1c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_00f83b3b-30cb-44cc-ae40-29e42b8bef33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_08f17596-077c-4f23-9b87-7b67bdf26599" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_00f83b3b-30cb-44cc-ae40-29e42b8bef33" xlink:to="loc_us-gaap_DebtInstrumentTable_08f17596-077c-4f23-9b87-7b67bdf26599" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_8afbcc39-8883-43ef-a02a-0c3274a201a2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_08f17596-077c-4f23-9b87-7b67bdf26599" xlink:to="loc_dei_LegalEntityAxis_8afbcc39-8883-43ef-a02a-0c3274a201a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8afbcc39-8883-43ef-a02a-0c3274a201a2_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8afbcc39-8883-43ef-a02a-0c3274a201a2" xlink:to="loc_dei_EntityDomain_8afbcc39-8883-43ef-a02a-0c3274a201a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_020e2e43-81b9-44ba-89f3-4d3cd748fdea" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8afbcc39-8883-43ef-a02a-0c3274a201a2" xlink:to="loc_dei_EntityDomain_020e2e43-81b9-44ba-89f3-4d3cd748fdea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_e8cf85d0-7d44-4df4-8623-278b137450a7" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_020e2e43-81b9-44ba-89f3-4d3cd748fdea" xlink:to="loc_aal_AmericanAirlinesIncMember_e8cf85d0-7d44-4df4-8623-278b137450a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_60d0bbd8-f8cf-4dcd-b687-2427e4cac9c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_00f83b3b-30cb-44cc-ae40-29e42b8bef33" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_60d0bbd8-f8cf-4dcd-b687-2427e4cac9c8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Leases" xlink:type="simple" xlink:href="aal-20231231.xsd#Leases"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Leases" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_860af7de-e5ed-4a78-844a-3a8742f6a812" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_1b8bd283-8dd9-47fc-8249-0759f9cee914" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_860af7de-e5ed-4a78-844a-3a8742f6a812" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_1b8bd283-8dd9-47fc-8249-0759f9cee914" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_7d996c2c-54e5-4795-8d4f-fae436d0caf4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_1b8bd283-8dd9-47fc-8249-0759f9cee914" xlink:to="loc_dei_LegalEntityAxis_7d996c2c-54e5-4795-8d4f-fae436d0caf4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7d996c2c-54e5-4795-8d4f-fae436d0caf4_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7d996c2c-54e5-4795-8d4f-fae436d0caf4" xlink:to="loc_dei_EntityDomain_7d996c2c-54e5-4795-8d4f-fae436d0caf4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0f911f18-6fea-4684-8c39-309e3824bb76" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7d996c2c-54e5-4795-8d4f-fae436d0caf4" xlink:to="loc_dei_EntityDomain_0f911f18-6fea-4684-8c39-309e3824bb76" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_5c83447d-4107-41e9-b3f5-4e0ea8278a3e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0f911f18-6fea-4684-8c39-309e3824bb76" xlink:to="loc_aal_AmericanAirlinesIncMember_5c83447d-4107-41e9-b3f5-4e0ea8278a3e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeFinanceLeasesTextBlock_50860803-5151-44d4-ad01-c392e61eeb55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeFinanceLeasesTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_860af7de-e5ed-4a78-844a-3a8742f6a812" xlink:to="loc_us-gaap_LesseeFinanceLeasesTextBlock_50860803-5151-44d4-ad01-c392e61eeb55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeasesTextBlock_b74702db-90de-4678-99b6-795144f3e441" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeasesTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_860af7de-e5ed-4a78-844a-3a8742f6a812" xlink:to="loc_us-gaap_LesseeOperatingLeasesTextBlock_b74702db-90de-4678-99b6-795144f3e441" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxes" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxes"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesLineItems_47a78fc4-52c6-410a-acde-69ac49452f2f" xlink:href="aal-20231231.xsd#aal_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesTable_a90faa42-7bc3-4127-9872-f8dd77433997" xlink:href="aal-20231231.xsd#aal_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_47a78fc4-52c6-410a-acde-69ac49452f2f" xlink:to="loc_aal_IncomeTaxesTable_a90faa42-7bc3-4127-9872-f8dd77433997" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d5b2ec88-3518-4ba5-a5bb-c5210f042594" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_a90faa42-7bc3-4127-9872-f8dd77433997" xlink:to="loc_dei_LegalEntityAxis_d5b2ec88-3518-4ba5-a5bb-c5210f042594" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d5b2ec88-3518-4ba5-a5bb-c5210f042594_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d5b2ec88-3518-4ba5-a5bb-c5210f042594" xlink:to="loc_dei_EntityDomain_d5b2ec88-3518-4ba5-a5bb-c5210f042594_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1768e212-0df9-4818-8e46-1e7a3e273e4e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d5b2ec88-3518-4ba5-a5bb-c5210f042594" xlink:to="loc_dei_EntityDomain_1768e212-0df9-4818-8e46-1e7a3e273e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_35e6b163-1632-48e1-b6f7-21a17fcb57ee" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1768e212-0df9-4818-8e46-1e7a3e273e4e" xlink:to="loc_aal_AmericanAirlinesIncMember_35e6b163-1632-48e1-b6f7-21a17fcb57ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_5947193e-1387-4b53-9284-1cd6e57c9c0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_47a78fc4-52c6-410a-acde-69ac49452f2f" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_5947193e-1387-4b53-9284-1cd6e57c9c0a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurements" xlink:type="simple" xlink:href="aal-20231231.xsd#FairValueMeasurements"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurements" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ae91a663-9711-4a8f-9141-ed1e1618ee79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_79b04ee3-cff0-4889-93eb-9a1ded40191c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ae91a663-9711-4a8f-9141-ed1e1618ee79" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_79b04ee3-cff0-4889-93eb-9a1ded40191c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_12dabd60-2c07-42e6-8734-1d49ec4c7a92" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_79b04ee3-cff0-4889-93eb-9a1ded40191c" xlink:to="loc_dei_LegalEntityAxis_12dabd60-2c07-42e6-8734-1d49ec4c7a92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_12dabd60-2c07-42e6-8734-1d49ec4c7a92_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_12dabd60-2c07-42e6-8734-1d49ec4c7a92" xlink:to="loc_dei_EntityDomain_12dabd60-2c07-42e6-8734-1d49ec4c7a92_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ffe9d1ca-38bb-46f3-aae4-06fbcf9a3b67" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_12dabd60-2c07-42e6-8734-1d49ec4c7a92" xlink:to="loc_dei_EntityDomain_ffe9d1ca-38bb-46f3-aae4-06fbcf9a3b67" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_62a0fef8-1611-423b-9380-a25518a7e103" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ffe9d1ca-38bb-46f3-aae4-06fbcf9a3b67" xlink:to="loc_aal_AmericanAirlinesIncMember_62a0fef8-1611-423b-9380-a25518a7e103" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_b686a9b3-7b4f-4806-b129-c1f4eedc1c8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosuresTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_ae91a663-9711-4a8f-9141-ed1e1618ee79" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_b686a9b3-7b4f-4806-b129-c1f4eedc1c8d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Investments" xlink:type="simple" xlink:href="aal-20231231.xsd#Investments"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Investments" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_3e23d622-e8ac-4bc3-a0f1-c2b3ed883364" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_b2083b2d-516f-4b71-bce4-9b50411b58ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_3e23d622-e8ac-4bc3-a0f1-c2b3ed883364" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_b2083b2d-516f-4b71-bce4-9b50411b58ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_9a70705e-21ca-495d-b23a-a518063f1334" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_b2083b2d-516f-4b71-bce4-9b50411b58ce" xlink:to="loc_dei_LegalEntityAxis_9a70705e-21ca-495d-b23a-a518063f1334" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9a70705e-21ca-495d-b23a-a518063f1334_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_9a70705e-21ca-495d-b23a-a518063f1334" xlink:to="loc_dei_EntityDomain_9a70705e-21ca-495d-b23a-a518063f1334_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e1ca9ee4-648d-417b-9f1f-867098b3856c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_9a70705e-21ca-495d-b23a-a518063f1334" xlink:to="loc_dei_EntityDomain_e1ca9ee4-648d-417b-9f1f-867098b3856c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_1d431fd9-a8e6-43c4-ac8c-3b837ef19a01" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e1ca9ee4-648d-417b-9f1f-867098b3856c" xlink:to="loc_aal_AmericanAirlinesIncMember_1d431fd9-a8e6-43c4-ac8c-3b837ef19a01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTextBlock_8cc46a8d-30cb-4835-9f5a-e30de135c30c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_3e23d622-e8ac-4bc3-a0f1-c2b3ed883364" xlink:to="loc_us-gaap_InvestmentTextBlock_8cc46a8d-30cb-4835-9f5a-e30de135c30c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlans" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlans"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlans" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_823c87c0-e67b-4f99-a9df-38c523c85948" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_f6429741-cead-4206-8600-fb8a3c14cde4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_823c87c0-e67b-4f99-a9df-38c523c85948" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_f6429741-cead-4206-8600-fb8a3c14cde4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_808dd10e-47ac-479c-839f-05d3c845d7df" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_f6429741-cead-4206-8600-fb8a3c14cde4" xlink:to="loc_dei_LegalEntityAxis_808dd10e-47ac-479c-839f-05d3c845d7df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_808dd10e-47ac-479c-839f-05d3c845d7df_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_808dd10e-47ac-479c-839f-05d3c845d7df" xlink:to="loc_dei_EntityDomain_808dd10e-47ac-479c-839f-05d3c845d7df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8bdb9743-ec91-4aad-8c81-bfaa4c36a276" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_808dd10e-47ac-479c-839f-05d3c845d7df" xlink:to="loc_dei_EntityDomain_8bdb9743-ec91-4aad-8c81-bfaa4c36a276" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_78b450d9-4884-4680-afea-9f64b573f81a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8bdb9743-ec91-4aad-8c81-bfaa4c36a276" xlink:to="loc_aal_AmericanAirlinesIncMember_78b450d9-4884-4680-afea-9f64b573f81a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_899c5344-4b90-42c5-9426-b370c0f7cef4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_823c87c0-e67b-4f99-a9df-38c523c85948" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_899c5344-4b90-42c5-9426-b370c0f7cef4" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveLoss" xlink:type="simple" xlink:href="aal-20231231.xsd#AccumulatedOtherComprehensiveLoss"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveLoss" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b7140109-d2b7-49d2-9131-7a776e03cc1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_578ccd9e-851b-4e82-826c-8f1f1afb56d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b7140109-d2b7-49d2-9131-7a776e03cc1d" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_578ccd9e-851b-4e82-826c-8f1f1afb56d7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_3d18f94f-28af-4447-9769-74d2d6caa498" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_578ccd9e-851b-4e82-826c-8f1f1afb56d7" xlink:to="loc_dei_LegalEntityAxis_3d18f94f-28af-4447-9769-74d2d6caa498" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3d18f94f-28af-4447-9769-74d2d6caa498_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3d18f94f-28af-4447-9769-74d2d6caa498" xlink:to="loc_dei_EntityDomain_3d18f94f-28af-4447-9769-74d2d6caa498_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_85b8a972-c453-43f7-a40b-93b66b5e0b45" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3d18f94f-28af-4447-9769-74d2d6caa498" xlink:to="loc_dei_EntityDomain_85b8a972-c453-43f7-a40b-93b66b5e0b45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_57a539f4-0267-413e-8e8a-aa1d9a864658" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_85b8a972-c453-43f7-a40b-93b66b5e0b45" xlink:to="loc_aal_AmericanAirlinesIncMember_57a539f4-0267-413e-8e8a-aa1d9a864658" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_8bed3c29-5209-41e6-9c90-ac6ae4363f3d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_b7140109-d2b7-49d2-9131-7a776e03cc1d" xlink:to="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_8bed3c29-5209-41e6-9c90-ac6ae4363f3d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesandGuarantees" xlink:type="simple" xlink:href="aal-20231231.xsd#CommitmentsContingenciesandGuarantees"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesandGuarantees" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_CommitmentsandContingenciesLineItems_d3a866dd-c260-44e6-a933-428d521432a9" xlink:href="aal-20231231.xsd#aal_CommitmentsandContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CommitmentsandContingenciesTable_1eccd077-5f07-493b-8acd-dc73105f11f7" xlink:href="aal-20231231.xsd#aal_CommitmentsandContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_d3a866dd-c260-44e6-a933-428d521432a9" xlink:to="loc_aal_CommitmentsandContingenciesTable_1eccd077-5f07-493b-8acd-dc73105f11f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_dc56999f-2626-43c6-b1b1-9838718d2226" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_CommitmentsandContingenciesTable_1eccd077-5f07-493b-8acd-dc73105f11f7" xlink:to="loc_dei_LegalEntityAxis_dc56999f-2626-43c6-b1b1-9838718d2226" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_dc56999f-2626-43c6-b1b1-9838718d2226_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_dc56999f-2626-43c6-b1b1-9838718d2226" xlink:to="loc_dei_EntityDomain_dc56999f-2626-43c6-b1b1-9838718d2226_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_14472e4a-ce5e-4a5e-adb8-21d8aa405127" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_dc56999f-2626-43c6-b1b1-9838718d2226" xlink:to="loc_dei_EntityDomain_14472e4a-ce5e-4a5e-adb8-21d8aa405127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_08af11ac-311a-465a-8f89-267edba5a3c3" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_14472e4a-ce5e-4a5e-adb8-21d8aa405127" xlink:to="loc_aal_AmericanAirlinesIncMember_08af11ac-311a-465a-8f89-267edba5a3c3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_07bdfb6a-adc0-43fe-aaba-708eb491b2b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_d3a866dd-c260-44e6-a933-428d521432a9" xlink:to="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_07bdfb6a-adc0-43fe-aaba-708eb491b2b3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformation" xlink:type="simple" xlink:href="aal-20231231.xsd#SupplementalCashFlowInformation"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_e24a1b7b-27f5-4b76-ab83-f693dd66d639" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_3a955819-55f6-4919-be60-3b0740a11953" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_e24a1b7b-27f5-4b76-ab83-f693dd66d639" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_3a955819-55f6-4919-be60-3b0740a11953" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_068dd4aa-bf95-4577-98e1-7f88321e4e9d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_3a955819-55f6-4919-be60-3b0740a11953" xlink:to="loc_dei_LegalEntityAxis_068dd4aa-bf95-4577-98e1-7f88321e4e9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_068dd4aa-bf95-4577-98e1-7f88321e4e9d_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_068dd4aa-bf95-4577-98e1-7f88321e4e9d" xlink:to="loc_dei_EntityDomain_068dd4aa-bf95-4577-98e1-7f88321e4e9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_734d136e-6f13-4a0e-8344-bea2aeda54e9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_068dd4aa-bf95-4577-98e1-7f88321e4e9d" xlink:to="loc_dei_EntityDomain_734d136e-6f13-4a0e-8344-bea2aeda54e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_bba0e0cb-9c37-4e45-b0b8-4d8e21db182e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_734d136e-6f13-4a0e-8344-bea2aeda54e9" xlink:to="loc_aal_AmericanAirlinesIncMember_bba0e0cb-9c37-4e45-b0b8-4d8e21db182e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_e7287b44-0b2c-49d8-b84c-a3a1b1fb29cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashFlowSupplementalDisclosuresTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_e24a1b7b-27f5-4b76-ab83-f693dd66d639" xlink:to="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_e7287b44-0b2c-49d8-b84c-a3a1b1fb29cd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsandRelatedDisclosures" xlink:type="simple" xlink:href="aal-20231231.xsd#OperatingSegmentsandRelatedDisclosures"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsandRelatedDisclosures" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_94c85668-466c-4b70-8d11-e5fa8e300696" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_e444d0d4-aed6-47d1-b33f-cf8ba3abd885" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_94c85668-466c-4b70-8d11-e5fa8e300696" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_e444d0d4-aed6-47d1-b33f-cf8ba3abd885" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6a22f00d-16c9-4688-b70c-35a60ae1bb69" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_e444d0d4-aed6-47d1-b33f-cf8ba3abd885" xlink:to="loc_dei_LegalEntityAxis_6a22f00d-16c9-4688-b70c-35a60ae1bb69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6a22f00d-16c9-4688-b70c-35a60ae1bb69_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6a22f00d-16c9-4688-b70c-35a60ae1bb69" xlink:to="loc_dei_EntityDomain_6a22f00d-16c9-4688-b70c-35a60ae1bb69_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2fc1dd8f-8a8c-4418-a094-8130d1f38050" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6a22f00d-16c9-4688-b70c-35a60ae1bb69" xlink:to="loc_dei_EntityDomain_2fc1dd8f-8a8c-4418-a094-8130d1f38050" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_5cf3fb9a-a8a6-41f5-aac1-7fbb76183f58" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2fc1dd8f-8a8c-4418-a094-8130d1f38050" xlink:to="loc_aal_AmericanAirlinesIncMember_5cf3fb9a-a8a6-41f5-aac1-7fbb76183f58" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_c3c6381f-edb5-4630-a7df-46a71efd1cc3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_94c85668-466c-4b70-8d11-e5fa8e300696" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_c3c6381f-edb5-4630-a7df-46a71efd1cc3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SharebasedCompensation" xlink:type="simple" xlink:href="aal-20231231.xsd#SharebasedCompensation"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SharebasedCompensation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d5a53ea-9871-45ec-859f-fbbca921c9ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2408b9ad-6e92-423d-8804-aad55badae9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d5a53ea-9871-45ec-859f-fbbca921c9ec" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2408b9ad-6e92-423d-8804-aad55badae9b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6af42c20-7307-475c-a88b-5f62c52e66f5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2408b9ad-6e92-423d-8804-aad55badae9b" xlink:to="loc_dei_LegalEntityAxis_6af42c20-7307-475c-a88b-5f62c52e66f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6af42c20-7307-475c-a88b-5f62c52e66f5_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6af42c20-7307-475c-a88b-5f62c52e66f5" xlink:to="loc_dei_EntityDomain_6af42c20-7307-475c-a88b-5f62c52e66f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4a4580ed-93fc-4e6c-b7bb-63a6bcb65cd2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6af42c20-7307-475c-a88b-5f62c52e66f5" xlink:to="loc_dei_EntityDomain_4a4580ed-93fc-4e6c-b7bb-63a6bcb65cd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_75babd80-0016-4a05-b43d-a674ddfbb858" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4a4580ed-93fc-4e6c-b7bb-63a6bcb65cd2" xlink:to="loc_aal_AmericanAirlinesIncMember_75babd80-0016-4a05-b43d-a674ddfbb858" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_82a9c425-9076-4377-89c0-3e2d5eda7d4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_0d5a53ea-9871-45ec-859f-fbbca921c9ec" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_82a9c425-9076-4377-89c0-3e2d5eda7d4c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ValuationandQualifyingAccounts" xlink:type="simple" xlink:href="aal-20231231.xsd#ValuationandQualifyingAccounts"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationandQualifyingAccounts" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6fa93df3-0671-4339-bd84-fcb33255bb59" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a1720d37-b9b1-4255-aade-c92721e7bf54" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6fa93df3-0671-4339-bd84-fcb33255bb59" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a1720d37-b9b1-4255-aade-c92721e7bf54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_de11263d-1009-439d-b265-da7db963729e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_a1720d37-b9b1-4255-aade-c92721e7bf54" xlink:to="loc_dei_LegalEntityAxis_de11263d-1009-439d-b265-da7db963729e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_de11263d-1009-439d-b265-da7db963729e_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_de11263d-1009-439d-b265-da7db963729e" xlink:to="loc_dei_EntityDomain_de11263d-1009-439d-b265-da7db963729e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_56298196-4c9d-49d4-a38a-4f8dc9f3c77e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_de11263d-1009-439d-b265-da7db963729e" xlink:to="loc_dei_EntityDomain_56298196-4c9d-49d4-a38a-4f8dc9f3c77e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f59bc435-9d6e-4db8-b703-74463be7ec49" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_56298196-4c9d-49d4-a38a-4f8dc9f3c77e" xlink:to="loc_aal_AmericanAirlinesIncMember_f59bc435-9d6e-4db8-b703-74463be7ec49" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_723591ca-978f-4077-9f40-0256776c6007" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_6fa93df3-0671-4339-bd84-fcb33255bb59" xlink:to="loc_srt_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_723591ca-978f-4077-9f40-0256776c6007" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/TransactionswithRelatedParties" xlink:type="simple" xlink:href="aal-20231231.xsd#TransactionswithRelatedParties"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionswithRelatedParties" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_7e05d414-2d6b-4963-a432-bd3494e5f630" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6400bd51-091b-446c-89c3-c074157cb9ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_7e05d414-2d6b-4963-a432-bd3494e5f630" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6400bd51-091b-446c-89c3-c074157cb9ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_87228bf2-5d49-4653-be21-ee11ed8c130f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_6400bd51-091b-446c-89c3-c074157cb9ad" xlink:to="loc_dei_LegalEntityAxis_87228bf2-5d49-4653-be21-ee11ed8c130f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_87228bf2-5d49-4653-be21-ee11ed8c130f_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_87228bf2-5d49-4653-be21-ee11ed8c130f" xlink:to="loc_dei_EntityDomain_87228bf2-5d49-4653-be21-ee11ed8c130f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_51b974eb-3cdf-4397-ae46-534a031146c5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_87228bf2-5d49-4653-be21-ee11ed8c130f" xlink:to="loc_dei_EntityDomain_51b974eb-3cdf-4397-ae46-534a031146c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_9cd5f5e4-8052-432c-9583-d20349326866" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_51b974eb-3cdf-4397-ae46-534a031146c5" xlink:to="loc_aal_AmericanAirlinesIncMember_9cd5f5e4-8052-432c-9583-d20349326866" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_4eef161a-7c92-412d-9886-df2e4040ff49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_7e05d414-2d6b-4963-a432-bd3494e5f630" xlink:to="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_4eef161a-7c92-412d-9886-df2e4040ff49" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_3959da6c-ca56-46d4-8c36-21e28a1ae5c6" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_3959da6c-ca56-46d4-8c36-21e28a1ae5c6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_308efadd-6cd6-44de-82a6-c1cbb735f3d9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_3959da6c-ca56-46d4-8c36-21e28a1ae5c6" xlink:to="loc_dei_LegalEntityAxis_308efadd-6cd6-44de-82a6-c1cbb735f3d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_308efadd-6cd6-44de-82a6-c1cbb735f3d9_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_308efadd-6cd6-44de-82a6-c1cbb735f3d9" xlink:to="loc_dei_EntityDomain_308efadd-6cd6-44de-82a6-c1cbb735f3d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_16c70854-4f49-4439-b0fc-a77525b9510d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_308efadd-6cd6-44de-82a6-c1cbb735f3d9" xlink:to="loc_dei_EntityDomain_16c70854-4f49-4439-b0fc-a77525b9510d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_a4fbe805-b805-4d8e-8655-114c4352e002" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_16c70854-4f49-4439-b0fc-a77525b9510d" xlink:to="loc_aal_AmericanAirlinesIncMember_a4fbe805-b805-4d8e-8655-114c4352e002" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_77ca6953-156f-4a00-a246-d1754b8c8a42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_77ca6953-156f-4a00-a246-d1754b8c8a42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_b6ebf000-fe0d-49f7-8ac9-fd08060f69cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_b6ebf000-fe0d-49f7-8ac9-fd08060f69cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentPolicyTextBlock_4c26d202-5958-4a55-9ae0-2ad956781209" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_InvestmentPolicyTextBlock_4c26d202-5958-4a55-9ae0-2ad956781209" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock_0b5eb494-abfb-4851-ab26-1c9518a20f52" xlink:href="aal-20231231.xsd#aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock_0b5eb494-abfb-4851-ab26-1c9518a20f52" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeAndOtherAccountsReceivablePolicy_2734eaa5-43a6-4fff-97ac-af5110ba1320" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TradeAndOtherAccountsReceivablePolicy"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_TradeAndOtherAccountsReceivablePolicy_2734eaa5-43a6-4fff-97ac-af5110ba1320" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_0c4e8486-0bb8-4252-97fa-9068d2c3e259" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_InventoryPolicyTextBlock_0c4e8486-0bb8-4252-97fa-9068d2c3e259" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_79aff47c-3cc2-42fb-8801-cffcd54b3866" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_79aff47c-3cc2-42fb-8801-cffcd54b3866" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_0aae4622-18b7-4fba-9a84-7a4a125fddda" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_ImpairmentOrDisposalOfLongLivedAssetsPolicyTextBlock_0aae4622-18b7-4fba-9a84-7a4a125fddda" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeasesPolicyTextBlock_e4199523-4b38-4d6f-a004-4d60fe54c391" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeasesPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_LesseeLeasesPolicyTextBlock_e4199523-4b38-4d6f-a004-4d60fe54c391" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_b0bd985c-1dc8-4641-8d10-15174bfc7901" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_IncomeTaxPolicyTextBlock_b0bd985c-1dc8-4641-8d10-15174bfc7901" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_a3e77e0d-aab4-4713-8a2c-26d8c62a63c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_a3e77e0d-aab4-4713-8a2c-26d8c62a63c8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_d032778a-a469-4e6e-ae03-9c58fb2949e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_d032778a-a469-4e6e-ae03-9c58fb2949e2" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_d2d594e7-a948-4fe2-8d00-c1b934217364" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerPolicyTextBlock_d2d594e7-a948-4fe2-8d00-c1b934217364" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaintenanceCostPolicyPolicyTextBlock_4b694424-9f1e-44fa-87a8-84a8626367bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MaintenanceCostPolicyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_MaintenanceCostPolicyPolicyTextBlock_4b694424-9f1e-44fa-87a8-84a8626367bf" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_9364444a-6d1e-4c46-9e41-65dd43559916" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_9364444a-6d1e-4c46-9e41-65dd43559916" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_705bf433-d525-4998-9403-0b76bad09e4b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_705bf433-d525-4998-9403-0b76bad09e4b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_d67dff88-f503-4871-8814-035fcdcec3e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_d67dff88-f503-4871-8814-035fcdcec3e5" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OtherCostAndExpenseOperatingPolicyTextBlock_75879b69-ce3a-441d-a569-cdedb7f59f21" xlink:href="aal-20231231.xsd#aal_OtherCostAndExpenseOperatingPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_aal_OtherCostAndExpenseOperatingPolicyTextBlock_75879b69-ce3a-441d-a569-cdedb7f59f21" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RegionalExpensesPolicyPolicyTextBlock_994d405a-9919-48d4-ac41-17743c172d1a" xlink:href="aal-20231231.xsd#aal_RegionalExpensesPolicyPolicyTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_cec34643-384b-4ac8-a482-e4636b86bea8" xlink:to="loc_aal_RegionalExpensesPolicyPolicyTextBlock_994d405a-9919-48d4-ac41-17743c172d1a" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesTables" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_17a7f0d9-be46-4741-bb53-55c6d643e011" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_17a7f0d9-be46-4741-bb53-55c6d643e011" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_de23ad51-e0a7-4c48-a0cb-2b84000e5807" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_17a7f0d9-be46-4741-bb53-55c6d643e011" xlink:to="loc_dei_LegalEntityAxis_de23ad51-e0a7-4c48-a0cb-2b84000e5807" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_de23ad51-e0a7-4c48-a0cb-2b84000e5807_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_de23ad51-e0a7-4c48-a0cb-2b84000e5807" xlink:to="loc_dei_EntityDomain_de23ad51-e0a7-4c48-a0cb-2b84000e5807_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_de5fefe1-23d6-472c-b0e1-6954f1c2eea5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_de23ad51-e0a7-4c48-a0cb-2b84000e5807" xlink:to="loc_dei_EntityDomain_de5fefe1-23d6-472c-b0e1-6954f1c2eea5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_adbfe6be-c817-45e2-88eb-12cbe16c9c23" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_de5fefe1-23d6-472c-b0e1-6954f1c2eea5" xlink:to="loc_aal_AmericanAirlinesIncMember_adbfe6be-c817-45e2-88eb-12cbe16c9c23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ScheduleOfPayrollSupportProgramCARESActTableTextBlock_27751959-0e54-4c4c-9909-d234e33df8a1" xlink:href="aal-20231231.xsd#aal_ScheduleOfPayrollSupportProgramCARESActTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_aal_ScheduleOfPayrollSupportProgramCARESActTableTextBlock_27751959-0e54-4c4c-9909-d234e33df8a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_49da045f-df20-4aec-bef3-c057e6acced1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_49da045f-df20-4aec-bef3-c057e6acced1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_e1b01411-0ba9-4f7a-8ba7-7b17a770f3c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_e1b01411-0ba9-4f7a-8ba7-7b17a770f3c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_82f534d8-888d-4bf0-ab62-cf66761c916a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_82f534d8-888d-4bf0-ab62-cf66761c916a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_21bf313e-d6f7-41a0-b4e2-cb4e88521cbd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_21bf313e-d6f7-41a0-b4e2-cb4e88521cbd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_d37c4b16-ab0d-4003-be76-ba6b1d25a1ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_143004da-c294-4821-abc9-2ccda81b4585" xlink:to="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_d37c4b16-ab0d-4003-be76-ba6b1d25a1ab" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsNetTables" xlink:type="simple" xlink:href="aal-20231231.xsd#SpecialItemsNetTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsNetTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_a9176b9d-b361-4e27-a64d-31e6aa56e065" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_241cdef7-fd97-44ed-8cb1-141ea45e824e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_a9176b9d-b361-4e27-a64d-31e6aa56e065" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_241cdef7-fd97-44ed-8cb1-141ea45e824e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_443e391f-2fa5-482c-b280-7e15151e4d12" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_241cdef7-fd97-44ed-8cb1-141ea45e824e" xlink:to="loc_dei_LegalEntityAxis_443e391f-2fa5-482c-b280-7e15151e4d12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_443e391f-2fa5-482c-b280-7e15151e4d12_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_443e391f-2fa5-482c-b280-7e15151e4d12" xlink:to="loc_dei_EntityDomain_443e391f-2fa5-482c-b280-7e15151e4d12_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c3cb8598-31df-4820-8995-a8a286e80729" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_443e391f-2fa5-482c-b280-7e15151e4d12" xlink:to="loc_dei_EntityDomain_c3cb8598-31df-4820-8995-a8a286e80729" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_ac6b3409-3ccc-4758-b312-b04b44031f30" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_c3cb8598-31df-4820-8995-a8a286e80729" xlink:to="loc_aal_AmericanAirlinesIncMember_ac6b3409-3ccc-4758-b312-b04b44031f30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_cd008c43-b7c6-4dad-9d0d-fdf9c261be6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_a9176b9d-b361-4e27-a64d-31e6aa56e065" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_cd008c43-b7c6-4dad-9d0d-fdf9c261be6c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtTables" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_a0e3fdb7-96b2-40bd-809a-36af68abeef4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_us-gaap_DebtInstrumentTable_a0e3fdb7-96b2-40bd-809a-36af68abeef4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_541ef2b1-0143-424a-9141-55d94f49c121" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_a0e3fdb7-96b2-40bd-809a-36af68abeef4" xlink:to="loc_dei_LegalEntityAxis_541ef2b1-0143-424a-9141-55d94f49c121" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_541ef2b1-0143-424a-9141-55d94f49c121_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_541ef2b1-0143-424a-9141-55d94f49c121" xlink:to="loc_dei_EntityDomain_541ef2b1-0143-424a-9141-55d94f49c121_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5e900694-6eb3-4ac9-8b2e-edb9748b696b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_541ef2b1-0143-424a-9141-55d94f49c121" xlink:to="loc_dei_EntityDomain_5e900694-6eb3-4ac9-8b2e-edb9748b696b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_70f02e21-f8d7-47b5-877e-75b78058778e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_5e900694-6eb3-4ac9-8b2e-edb9748b696b" xlink:to="loc_aal_AmericanAirlinesIncMember_70f02e21-f8d7-47b5-877e-75b78058778e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDebtTableTextBlock_c6379fae-ef32-45a3-9c7b-944bf96ce547" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDebtTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_us-gaap_ScheduleOfDebtTableTextBlock_c6379fae-ef32-45a3-9c7b-944bf96ce547" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_82a59060-215d-41e3-905e-6c336532f2b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_82a59060-215d-41e3-905e-6c336532f2b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_2014ff6c-5fca-468d-b222-752974800fcb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_2014ff6c-5fca-468d-b222-752974800fcb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtTableTextBlock_fcf4adf1-9a46-48ea-9d31-ad921c3d70bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_us-gaap_ConvertibleDebtTableTextBlock_fcf4adf1-9a46-48ea-9d31-ad921c3d70bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ScheduleOfCollateralCoverageTestsTableTextBlock_710cf21f-c96b-4b33-bd05-2a92b225581d" xlink:href="aal-20231231.xsd#aal_ScheduleOfCollateralCoverageTestsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1379f80d-3d35-425c-b225-e36a5a64e86b" xlink:to="loc_aal_ScheduleOfCollateralCoverageTestsTableTextBlock_710cf21f-c96b-4b33-bd05-2a92b225581d" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesTables" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_e1885e09-8d76-41f6-8fd6-30e3fa2c84c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_e1885e09-8d76-41f6-8fd6-30e3fa2c84c7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5a305f9c-5700-4c36-921b-035df62476d1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_e1885e09-8d76-41f6-8fd6-30e3fa2c84c7" xlink:to="loc_dei_LegalEntityAxis_5a305f9c-5700-4c36-921b-035df62476d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5a305f9c-5700-4c36-921b-035df62476d1_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5a305f9c-5700-4c36-921b-035df62476d1" xlink:to="loc_dei_EntityDomain_5a305f9c-5700-4c36-921b-035df62476d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_978a20cd-8bf1-4675-b2a9-3c1179410996" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5a305f9c-5700-4c36-921b-035df62476d1" xlink:to="loc_dei_EntityDomain_978a20cd-8bf1-4675-b2a9-3c1179410996" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_d888966a-2783-4646-91f8-87bbdb3db348" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_978a20cd-8bf1-4675-b2a9-3c1179410996" xlink:to="loc_aal_AmericanAirlinesIncMember_d888966a-2783-4646-91f8-87bbdb3db348" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCostTableTextBlock_b4317418-2c0f-4adf-9648-bb46819ab790" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseCostTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_us-gaap_LeaseCostTableTextBlock_b4317418-2c0f-4adf-9648-bb46819ab790" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AssetsandLiabilitiesLesseeTableTextBlock_685a3e8d-0500-4327-b790-16054f4ab125" xlink:href="aal-20231231.xsd#aal_AssetsandLiabilitiesLesseeTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_aal_AssetsandLiabilitiesLesseeTableTextBlock_685a3e8d-0500-4327-b790-16054f4ab125" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CashFlowLesseeTableTextBlock_08a377de-caa0-4f11-be60-a64355434920" xlink:href="aal-20231231.xsd#aal_CashFlowLesseeTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_aal_CashFlowLesseeTableTextBlock_08a377de-caa0-4f11-be60-a64355434920" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_65b45ace-8abb-416a-a038-d40e79cf3f22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_65b45ace-8abb-416a-a038-d40e79cf3f22" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_690feb8f-d25f-4c4a-a975-b34bef0729bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_40a357cd-478f-47a8-84a9-2178795e78d7" xlink:to="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_690feb8f-d25f-4c4a-a975-b34bef0729bb" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesTables" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxesTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesLineItems_516fb45b-d84a-42f2-98df-b067bf46140a" xlink:href="aal-20231231.xsd#aal_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesTable_9e719cab-ed75-4fa4-8b90-4e0cc162bb67" xlink:href="aal-20231231.xsd#aal_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_516fb45b-d84a-42f2-98df-b067bf46140a" xlink:to="loc_aal_IncomeTaxesTable_9e719cab-ed75-4fa4-8b90-4e0cc162bb67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_9e719cab-ed75-4fa4-8b90-4e0cc162bb67" xlink:to="loc_dei_LegalEntityAxis_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61" xlink:to="loc_dei_EntityDomain_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8959c8b5-6b21-4a38-8fb7-f6df8e027d12" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d686ca8d-3c46-45b6-ad2e-53dfa5c6dc61" xlink:to="loc_dei_EntityDomain_8959c8b5-6b21-4a38-8fb7-f6df8e027d12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_80f2fdb7-22f5-492e-bac6-99dad911468c" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8959c8b5-6b21-4a38-8fb7-f6df8e027d12" xlink:to="loc_aal_AmericanAirlinesIncMember_80f2fdb7-22f5-492e-bac6-99dad911468c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_11641fea-b939-4871-b704-ec68d50cc2a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_516fb45b-d84a-42f2-98df-b067bf46140a" xlink:to="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_11641fea-b939-4871-b704-ec68d50cc2a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_af7fc405-6ae4-4030-8def-81034723aaa8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_516fb45b-d84a-42f2-98df-b067bf46140a" xlink:to="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_af7fc405-6ae4-4030-8def-81034723aaa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_fb1fbeb9-ca74-4519-8617-8efd4d0f6058" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_516fb45b-d84a-42f2-98df-b067bf46140a" xlink:to="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_fb1fbeb9-ca74-4519-8617-8efd4d0f6058" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsTables" xlink:type="simple" xlink:href="aal-20231231.xsd#FairValueMeasurementsTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c780782f-1455-4a96-bb14-ac07c9a5984d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9d543666-a93c-497c-ae1a-c89536cc9c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c780782f-1455-4a96-bb14-ac07c9a5984d" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9d543666-a93c-497c-ae1a-c89536cc9c0c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_424cc8c6-2765-4e8e-8e46-14518150321a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9d543666-a93c-497c-ae1a-c89536cc9c0c" xlink:to="loc_dei_LegalEntityAxis_424cc8c6-2765-4e8e-8e46-14518150321a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_424cc8c6-2765-4e8e-8e46-14518150321a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_424cc8c6-2765-4e8e-8e46-14518150321a" xlink:to="loc_dei_EntityDomain_424cc8c6-2765-4e8e-8e46-14518150321a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a56c22c3-add3-4f6c-acda-263157274581" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_424cc8c6-2765-4e8e-8e46-14518150321a" xlink:to="loc_dei_EntityDomain_a56c22c3-add3-4f6c-acda-263157274581" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_ccd2a830-f530-4df4-a180-f5c67d2a998a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a56c22c3-add3-4f6c-acda-263157274581" xlink:to="loc_aal_AmericanAirlinesIncMember_ccd2a830-f530-4df4-a180-f5c67d2a998a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_9e75e5c0-373b-4a90-932f-7569370ae5c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c780782f-1455-4a96-bb14-ac07c9a5984d" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_9e75e5c0-373b-4a90-932f-7569370ae5c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_3eb18d93-d15e-4c52-ba63-37ca6bd6b54b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c780782f-1455-4a96-bb14-ac07c9a5984d" xlink:to="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_3eb18d93-d15e-4c52-ba63-37ca6bd6b54b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/InvestmentsTables" xlink:type="simple" xlink:href="aal-20231231.xsd#InvestmentsTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/InvestmentsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_88e8a476-14d2-4a8a-9615-e86156fe8811" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_d400814d-61ec-4b5a-80d7-fd37a5e5948d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_88e8a476-14d2-4a8a-9615-e86156fe8811" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_d400814d-61ec-4b5a-80d7-fd37a5e5948d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_d400814d-61ec-4b5a-80d7-fd37a5e5948d" xlink:to="loc_dei_LegalEntityAxis_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26" xlink:to="loc_dei_EntityDomain_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a7803faf-64ef-4acd-9f0f-4e9e1937e929" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ecf2bca2-f763-4d98-a8a1-52f3d95a6d26" xlink:to="loc_dei_EntityDomain_a7803faf-64ef-4acd-9f0f-4e9e1937e929" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_0326a528-a9fd-4ba9-9119-6cefd29044f3" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a7803faf-64ef-4acd-9f0f-4e9e1937e929" xlink:to="loc_aal_AmericanAirlinesIncMember_0326a528-a9fd-4ba9-9119-6cefd29044f3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTableTextBlock_86fa12ab-f8bd-4e28-b460-86f510bd765e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_88e8a476-14d2-4a8a-9615-e86156fe8811" xlink:to="loc_us-gaap_InvestmentTableTextBlock_86fa12ab-f8bd-4e28-b460-86f510bd765e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansTables" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a5738ba-3bd8-4af8-9a30-4354b81d059b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a5738ba-3bd8-4af8-9a30-4354b81d059b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_8579e228-65de-4c26-a277-a2588992cbc2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a5738ba-3bd8-4af8-9a30-4354b81d059b" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_8579e228-65de-4c26-a277-a2588992cbc2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_8579e228-65de-4c26-a277-a2588992cbc2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8579e228-65de-4c26-a277-a2588992cbc2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_8579e228-65de-4c26-a277-a2588992cbc2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_bdee42d5-a407-4817-8a7c-54958742899c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_8579e228-65de-4c26-a277-a2588992cbc2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_bdee42d5-a407-4817-8a7c-54958742899c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_10d5995d-d020-4ddf-9315-74c06a9338be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_bdee42d5-a407-4817-8a7c-54958742899c" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_10d5995d-d020-4ddf-9315-74c06a9338be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_e8f7813b-5d5e-4976-9b46-26d5322d7bad" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a5738ba-3bd8-4af8-9a30-4354b81d059b" xlink:to="loc_dei_LegalEntityAxis_e8f7813b-5d5e-4976-9b46-26d5322d7bad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e8f7813b-5d5e-4976-9b46-26d5322d7bad_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_e8f7813b-5d5e-4976-9b46-26d5322d7bad" xlink:to="loc_dei_EntityDomain_e8f7813b-5d5e-4976-9b46-26d5322d7bad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4a11839f-aae6-4127-a703-6e80a48c85d2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_e8f7813b-5d5e-4976-9b46-26d5322d7bad" xlink:to="loc_dei_EntityDomain_4a11839f-aae6-4127-a703-6e80a48c85d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_5a8c7aa3-0eab-438d-9b8a-cf8e0a44be37" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4a11839f-aae6-4127-a703-6e80a48c85d2" xlink:to="loc_aal_AmericanAirlinesIncMember_5a8c7aa3-0eab-438d-9b8a-cf8e0a44be37" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_b0c49c24-3d16-4e71-98b7-babc2884e80d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ChangesInProjectedBenefitObligationsFairValueOfPlanAssetsAndFundedStatusOfPlanTableTextBlock_b0c49c24-3d16-4e71-98b7-babc2884e80d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_1191e162-dcf3-4723-b165-3b15ea09138b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_1191e162-dcf3-4723-b165-3b15ea09138b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_6ba0fbe0-8d5d-4c45-94ad-f9d51ee033d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_6ba0fbe0-8d5d-4c45-94ad-f9d51ee033d0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_52080fa7-73b8-4e18-9f22-f6b35a66cfc1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_52080fa7-73b8-4e18-9f22-f6b35a66cfc1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_2bb62983-fb7f-46c0-9f4f-6b8565ab65da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfNetBenefitCostsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_2bb62983-fb7f-46c0-9f4f-6b8565ab65da" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_f59d1e00-8bfc-4143-b5ab-084baeb97997" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_f59d1e00-8bfc-4143-b5ab-084baeb97997" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_e75f14c0-ad3a-4ed8-aacd-aee3c99484c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_e75f14c0-ad3a-4ed8-aacd-aee3c99484c6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_a3f4dc6c-f29d-4a22-9ad0-388ba287c842" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_a3f4dc6c-f29d-4a22-9ad0-388ba287c842" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_8edde302-216e-4e1f-98e2-f0cb72f66c84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_c1d2bcdb-6efb-4978-9ccd-b657212804e8" xlink:to="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_8edde302-216e-4e1f-98e2-f0cb72f66c84" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveLossTables" xlink:type="simple" xlink:href="aal-20231231.xsd#AccumulatedOtherComprehensiveLossTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveLossTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8549e16b-0c54-4a13-a400-9075ed834aa7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ad450b89-c146-45bc-8870-741e6941b1ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8549e16b-0c54-4a13-a400-9075ed834aa7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ad450b89-c146-45bc-8870-741e6941b1ad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_ad450b89-c146-45bc-8870-741e6941b1ad" xlink:to="loc_dei_LegalEntityAxis_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c" xlink:to="loc_dei_EntityDomain_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d1c500c4-871d-47fc-b8ed-6f466d2af204" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_95cd0ba8-3fe7-47c4-aa40-20d6064d5e5c" xlink:to="loc_dei_EntityDomain_d1c500c4-871d-47fc-b8ed-6f466d2af204" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_ef651053-85a3-406b-9af5-a0a4fd4e8f3b" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d1c500c4-871d-47fc-b8ed-6f466d2af204" xlink:to="loc_aal_AmericanAirlinesIncMember_ef651053-85a3-406b-9af5-a0a4fd4e8f3b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_486ebb63-6bc5-41d1-98e1-5f2c1d2a9919" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8549e16b-0c54-4a13-a400-9075ed834aa7" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_486ebb63-6bc5-41d1-98e1-5f2c1d2a9919" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_cddaa6df-b271-4153-bbca-38417afd1634" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_8549e16b-0c54-4a13-a400-9075ed834aa7" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_cddaa6df-b271-4153-bbca-38417afd1634" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesTables" xlink:type="simple" xlink:href="aal-20231231.xsd#CommitmentsContingenciesandGuaranteesTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_CommitmentsandContingenciesLineItems_8f014a17-4025-4350-a9e1-3fe3f635309d" xlink:href="aal-20231231.xsd#aal_CommitmentsandContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CommitmentsandContingenciesTable_7ad44e9c-6aba-4e91-8bd8-1030fe1ac6a0" xlink:href="aal-20231231.xsd#aal_CommitmentsandContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_8f014a17-4025-4350-a9e1-3fe3f635309d" xlink:to="loc_aal_CommitmentsandContingenciesTable_7ad44e9c-6aba-4e91-8bd8-1030fe1ac6a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_14be941b-66b9-402c-be49-8ae0f7b2d7b2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_CommitmentsandContingenciesTable_7ad44e9c-6aba-4e91-8bd8-1030fe1ac6a0" xlink:to="loc_dei_LegalEntityAxis_14be941b-66b9-402c-be49-8ae0f7b2d7b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_14be941b-66b9-402c-be49-8ae0f7b2d7b2_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_14be941b-66b9-402c-be49-8ae0f7b2d7b2" xlink:to="loc_dei_EntityDomain_14be941b-66b9-402c-be49-8ae0f7b2d7b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b4d7d265-80bf-443b-9893-d0147fc53c6a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_14be941b-66b9-402c-be49-8ae0f7b2d7b2" xlink:to="loc_dei_EntityDomain_b4d7d265-80bf-443b-9893-d0147fc53c6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_bd69567c-8c07-4560-83a8-35c29ec5d862" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_b4d7d265-80bf-443b-9893-d0147fc53c6a" xlink:to="loc_aal_AmericanAirlinesIncMember_bd69567c-8c07-4560-83a8-35c29ec5d862" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTextBlock_c74be604-f8ae-4400-a4bf-d11cd7b49904" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_8f014a17-4025-4350-a9e1-3fe3f635309d" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTextBlock_c74be604-f8ae-4400-a4bf-d11cd7b49904" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock_f78a1e02-514b-45af-9679-00dfc562ff3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_8f014a17-4025-4350-a9e1-3fe3f635309d" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock_f78a1e02-514b-45af-9679-00dfc562ff3b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformationTables" xlink:type="simple" xlink:href="aal-20231231.xsd#SupplementalCashFlowInformationTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformationTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_88c5c9d9-76c7-4250-b123-8908415b52bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_68b1d882-4ddf-40ae-bf0d-506712bf8ae5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_88c5c9d9-76c7-4250-b123-8908415b52bb" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_68b1d882-4ddf-40ae-bf0d-506712bf8ae5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_625a1ced-5223-43e7-a22b-5bff2b434b9d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_68b1d882-4ddf-40ae-bf0d-506712bf8ae5" xlink:to="loc_dei_LegalEntityAxis_625a1ced-5223-43e7-a22b-5bff2b434b9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_625a1ced-5223-43e7-a22b-5bff2b434b9d_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_625a1ced-5223-43e7-a22b-5bff2b434b9d" xlink:to="loc_dei_EntityDomain_625a1ced-5223-43e7-a22b-5bff2b434b9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_aef58d2f-cbb7-449c-9184-eb036a3c9e7d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_625a1ced-5223-43e7-a22b-5bff2b434b9d" xlink:to="loc_dei_EntityDomain_aef58d2f-cbb7-449c-9184-eb036a3c9e7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_bd0c16a8-0eff-4538-a78d-4a4d04e70f15" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_aef58d2f-cbb7-449c-9184-eb036a3c9e7d" xlink:to="loc_aal_AmericanAirlinesIncMember_bd0c16a8-0eff-4538-a78d-4a4d04e70f15" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_2b392856-e2eb-49f2-95d8-9603e80b1712" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_88c5c9d9-76c7-4250-b123-8908415b52bb" xlink:to="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_2b392856-e2eb-49f2-95d8-9603e80b1712" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SharebasedCompensationTables" xlink:type="simple" xlink:href="aal-20231231.xsd#SharebasedCompensationTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SharebasedCompensationTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f0bb6a42-9428-4510-8d96-8d1f7a5f1412" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cb3dfa42-051f-44d0-a728-e1eccb65b1e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f0bb6a42-9428-4510-8d96-8d1f7a5f1412" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cb3dfa42-051f-44d0-a728-e1eccb65b1e1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2fab440d-bb80-4a54-acaa-6f091c9ffcf1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_cb3dfa42-051f-44d0-a728-e1eccb65b1e1" xlink:to="loc_dei_LegalEntityAxis_2fab440d-bb80-4a54-acaa-6f091c9ffcf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2fab440d-bb80-4a54-acaa-6f091c9ffcf1_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2fab440d-bb80-4a54-acaa-6f091c9ffcf1" xlink:to="loc_dei_EntityDomain_2fab440d-bb80-4a54-acaa-6f091c9ffcf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_fc65e6fa-2c3b-42e0-ae0f-5c9656a053cd" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2fab440d-bb80-4a54-acaa-6f091c9ffcf1" xlink:to="loc_dei_EntityDomain_fc65e6fa-2c3b-42e0-ae0f-5c9656a053cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_53a43068-f2f3-4822-8024-d1d5786a82be" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_fc65e6fa-2c3b-42e0-ae0f-5c9656a053cd" xlink:to="loc_aal_AmericanAirlinesIncMember_53a43068-f2f3-4822-8024-d1d5786a82be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_091983b8-bd2c-43cb-9fa2-47bbe08b65e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_f0bb6a42-9428-4510-8d96-8d1f7a5f1412" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_091983b8-bd2c-43cb-9fa2-47bbe08b65e5" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ValuationandQualifyingAccountsTables" xlink:type="simple" xlink:href="aal-20231231.xsd#ValuationandQualifyingAccountsTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationandQualifyingAccountsTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_9824a8ae-1fc4-4e27-acf8-5d6542976401" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_bf89e2ae-4718-4ed8-93b5-bfb38bda78a3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_9824a8ae-1fc4-4e27-acf8-5d6542976401" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_bf89e2ae-4718-4ed8-93b5-bfb38bda78a3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_666fa57e-535e-4ffb-8744-3c0d11002dc1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_bf89e2ae-4718-4ed8-93b5-bfb38bda78a3" xlink:to="loc_dei_LegalEntityAxis_666fa57e-535e-4ffb-8744-3c0d11002dc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_666fa57e-535e-4ffb-8744-3c0d11002dc1_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_666fa57e-535e-4ffb-8744-3c0d11002dc1" xlink:to="loc_dei_EntityDomain_666fa57e-535e-4ffb-8744-3c0d11002dc1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_af09609d-7f4d-494d-a49a-fba4fbf5dfbe" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_666fa57e-535e-4ffb-8744-3c0d11002dc1" xlink:to="loc_dei_EntityDomain_af09609d-7f4d-494d-a49a-fba4fbf5dfbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_47bb5930-8113-42bd-95cb-a334c46bf591" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_af09609d-7f4d-494d-a49a-fba4fbf5dfbe" xlink:to="loc_aal_AmericanAirlinesIncMember_47bb5930-8113-42bd-95cb-a334c46bf591" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock_9adde592-7e59-4e51-a8e8-4508d2552a8e" xlink:href="aal-20231231.xsd#aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_9824a8ae-1fc4-4e27-acf8-5d6542976401" xlink:to="loc_aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock_9adde592-7e59-4e51-a8e8-4508d2552a8e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/TransactionswithRelatedPartiesTables" xlink:type="simple" xlink:href="aal-20231231.xsd#TransactionswithRelatedPartiesTables"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionswithRelatedPartiesTables" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_17d16afd-d371-4c56-98d7-03536b356cdc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2394624-cebf-455b-a0ad-efe3a46a38da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_17d16afd-d371-4c56-98d7-03536b356cdc" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2394624-cebf-455b-a0ad-efe3a46a38da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_43494bff-84a8-494b-82d1-30d5bec4dd10" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_f2394624-cebf-455b-a0ad-efe3a46a38da" xlink:to="loc_dei_LegalEntityAxis_43494bff-84a8-494b-82d1-30d5bec4dd10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_43494bff-84a8-494b-82d1-30d5bec4dd10_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_43494bff-84a8-494b-82d1-30d5bec4dd10" xlink:to="loc_dei_EntityDomain_43494bff-84a8-494b-82d1-30d5bec4dd10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_61f575a0-ddee-4b56-b285-dc2c2f833c27" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_43494bff-84a8-494b-82d1-30d5bec4dd10" xlink:to="loc_dei_EntityDomain_61f575a0-ddee-4b56-b285-dc2c2f833c27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_af639f5d-50ef-42d7-9424-7ac7b828eef5" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_61f575a0-ddee-4b56-b285-dc2c2f833c27" xlink:to="loc_aal_AmericanAirlinesIncMember_af639f5d-50ef-42d7-9424-7ac7b828eef5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_28c33abe-300a-4666-8970-ca72384cedfd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_17d16afd-d371-4c56-98d7-03536b356cdc" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_28c33abe-300a-4666-8970-ca72384cedfd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnusualOrInfrequentItemLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnusualOrInfrequentItemTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_18777435-2b17-4065-adee-19d1db427998" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_srt_ProductOrServiceAxis_18777435-2b17-4065-adee-19d1db427998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_18777435-2b17-4065-adee-19d1db427998_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_18777435-2b17-4065-adee-19d1db427998" xlink:to="loc_srt_ProductsAndServicesDomain_18777435-2b17-4065-adee-19d1db427998_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_227af511-8724-43a2-9273-3f77b37bbcd2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_18777435-2b17-4065-adee-19d1db427998" xlink:to="loc_srt_ProductsAndServicesDomain_227af511-8724-43a2-9273-3f77b37bbcd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_d5e333aa-179f-49cb-8aec-2b8f92f31eb6" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_227af511-8724-43a2-9273-3f77b37bbcd2" xlink:to="loc_aal_AirTrafficMember_d5e333aa-179f-49cb-8aec-2b8f92f31eb6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_1defca79-0353-4b38-a52b-2e50d1b4227a" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_227af511-8724-43a2-9273-3f77b37bbcd2" xlink:to="loc_aal_LoyaltyProgramMember_1defca79-0353-4b38-a52b-2e50d1b4227a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_01cf7a9f-df86-41db-a10e-a0f35c77ee52" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_srt_RangeAxis_01cf7a9f-df86-41db-a10e-a0f35c77ee52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_01cf7a9f-df86-41db-a10e-a0f35c77ee52_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_01cf7a9f-df86-41db-a10e-a0f35c77ee52" xlink:to="loc_srt_RangeMember_01cf7a9f-df86-41db-a10e-a0f35c77ee52_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_67fdfdfc-5550-46a8-937b-5d65412d9ea2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_01cf7a9f-df86-41db-a10e-a0f35c77ee52" xlink:to="loc_srt_RangeMember_67fdfdfc-5550-46a8-937b-5d65412d9ea2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_dec9b133-270d-43d1-8775-9410b38a6079" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_67fdfdfc-5550-46a8-937b-5d65412d9ea2" xlink:to="loc_srt_MinimumMember_dec9b133-270d-43d1-8775-9410b38a6079" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_c9a00dbf-1fbc-4663-8feb-4eb125b37daa" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_67fdfdfc-5550-46a8-937b-5d65412d9ea2" xlink:to="loc_srt_MaximumMember_c9a00dbf-1fbc-4663-8feb-4eb125b37daa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_569096be-04c6-45ba-bede-368a64c4e73a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_dei_LegalEntityAxis_569096be-04c6-45ba-bede-368a64c4e73a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_569096be-04c6-45ba-bede-368a64c4e73a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_569096be-04c6-45ba-bede-368a64c4e73a" xlink:to="loc_dei_EntityDomain_569096be-04c6-45ba-bede-368a64c4e73a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4c4847ea-f706-4d76-82dd-046c89adfd4c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_569096be-04c6-45ba-bede-368a64c4e73a" xlink:to="loc_dei_EntityDomain_4c4847ea-f706-4d76-82dd-046c89adfd4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_cce36826-d687-4b6c-a9dc-1133387e91fb" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4c4847ea-f706-4d76-82dd-046c89adfd4c" xlink:to="loc_aal_AmericanAirlinesIncMember_cce36826-d687-4b6c-a9dc-1133387e91fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_us-gaap_CreditFacilityAxis_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc" xlink:to="loc_us-gaap_CreditFacilityDomain_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d6917160-3862-4cf7-9bb1-f30a567768f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_542b5d36-cae0-4ae4-85fb-5a16d5d5b5fc" xlink:to="loc_us-gaap_CreditFacilityDomain_d6917160-3862-4cf7-9bb1-f30a567768f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_6949f241-5769-4059-bb75-c4f045b30077" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d6917160-3862-4cf7-9bb1-f30a567768f4" xlink:to="loc_us-gaap_LineOfCreditMember_6949f241-5769-4059-bb75-c4f045b30077" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_ec4ffed9-ab21-4de5-b357-eab84cd70af6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_us-gaap_DebtInstrumentAxis_ec4ffed9-ab21-4de5-b357-eab84cd70af6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ec4ffed9-ab21-4de5-b357-eab84cd70af6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_ec4ffed9-ab21-4de5-b357-eab84cd70af6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ec4ffed9-ab21-4de5-b357-eab84cd70af6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c6c019af-30ff-441b-b700-c39903d72721" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_ec4ffed9-ab21-4de5-b357-eab84cd70af6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c6c019af-30ff-441b-b700-c39903d72721" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_TreasuryLoanAgreementCARESActMember_a0a67aaa-7f7c-4970-8a33-126b459ad3fc" xlink:href="aal-20231231.xsd#aal_TreasuryLoanAgreementCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c6c019af-30ff-441b-b700-c39903d72721" xlink:to="loc_aal_TreasuryLoanAgreementCARESActMember_a0a67aaa-7f7c-4970-8a33-126b459ad3fc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_0761e2b1-472a-4edf-a4c4-5f8d89d95f62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a08dcfb9-09d1-42f6-82ea-8f5c94789318" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_0761e2b1-472a-4edf-a4c4-5f8d89d95f62" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_0761e2b1-472a-4edf-a4c4-5f8d89d95f62_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_0761e2b1-472a-4edf-a4c4-5f8d89d95f62" xlink:to="loc_us-gaap_ReceivableTypeDomain_0761e2b1-472a-4edf-a4c4-5f8d89d95f62_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_ce89b1f4-829e-423d-8e3c-d59034cd21c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReceivableTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_0761e2b1-472a-4edf-a4c4-5f8d89d95f62" xlink:to="loc_us-gaap_ReceivableTypeDomain_ce89b1f4-829e-423d-8e3c-d59034cd21c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AccountReceivableFromBusinessPartnersMember_f9734f4b-7723-4139-88a2-b3127394bfc8" xlink:href="aal-20231231.xsd#aal_AccountReceivableFromBusinessPartnersMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_ce89b1f4-829e-423d-8e3c-d59034cd21c1" xlink:to="loc_aal_AccountReceivableFromBusinessPartnersMember_f9734f4b-7723-4139-88a2-b3127394bfc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AccountsReceivableFromTicketSalesMember_1aeb1143-ce2a-4dfa-94b4-49f5b17072a7" xlink:href="aal-20231231.xsd#aal_AccountsReceivableFromTicketSalesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_ce89b1f4-829e-423d-8e3c-d59034cd21c1" xlink:to="loc_aal_AccountsReceivableFromTicketSalesMember_1aeb1143-ce2a-4dfa-94b4-49f5b17072a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_7ee3bf67-ce8d-4ed1-87be-6c83cadb1453" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_7ee3bf67-ce8d-4ed1-87be-6c83cadb1453" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct_d3c27264-2ab2-4bdc-989e-6f0c7b4d92e8" xlink:href="aal-20231231.xsd#aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct_d3c27264-2ab2-4bdc-989e-6f0c7b4d92e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_83650a46-5118-437c-94a7-80c1c8082a15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_83650a46-5118-437c-94a7-80c1c8082a15" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_2705711a-c29c-4961-8505-e88d10acd46a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_ProceedsFromLinesOfCredit_2705711a-c29c-4961-8505-e88d10acd46a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized_ae4b7cd0-d7a9-4bf5-bd49-82081b21b174" xlink:href="aal-20231231.xsd#aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized_ae4b7cd0-d7a9-4bf5-bd49-82081b21b174" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_d57c96d0-b321-46aa-a516-2b2739afa68c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_d57c96d0-b321-46aa-a516-2b2739afa68c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ContractReceivablesSettlementDuration_7ff3158d-0700-4733-8dae-daa9ef9b4c92" xlink:href="aal-20231231.xsd#aal_ContractReceivablesSettlementDuration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_ContractReceivablesSettlementDuration_7ff3158d-0700-4733-8dae-daa9ef9b4c92" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportingUnits_9b86c357-3546-405f-b9e7-2c90455efe46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfReportingUnits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_NumberOfReportingUnits_9b86c357-3546-405f-b9e7-2c90455efe46" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_0c4cb3bf-9aee-4aec-8052-7e5209f3177e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_0c4cb3bf-9aee-4aec-8052-7e5209f3177e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_3a08abbe-1823-472a-87ec-f8d09fad4ccc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_Goodwill_3a08abbe-1823-472a-87ec-f8d09fad4ccc" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_ab95bb7d-26c5-4536-a760-b239894b57e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_ab95bb7d-26c5-4536-a760-b239894b57e9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_0490d197-ac36-49f6-a929-88b8c36970b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_0490d197-ac36-49f6-a929-88b8c36970b6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_a23dd3da-bb4e-453d-8ce1-1abae4c59a6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_a23dd3da-bb4e-453d-8ce1-1abae4c59a6c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RevenuePerformanceObligationTerm_91a2ea2e-f318-4f53-b8b1-89a2a1b0e0fa" xlink:href="aal-20231231.xsd#aal_RevenuePerformanceObligationTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_RevenuePerformanceObligationTerm_91a2ea2e-f318-4f53-b8b1-89a2a1b0e0fa" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_6eb7cfaf-be74-4262-96a7-f73e157b8353" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenuePerformanceObligationDescriptionOfTiming"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_6eb7cfaf-be74-4262-96a7-f73e157b8353" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RevenuePerformanceObligationPaymentTerm_e3f4082c-7acd-4390-85be-a9d3d03a3ea8" xlink:href="aal-20231231.xsd#aal_RevenuePerformanceObligationPaymentTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_RevenuePerformanceObligationPaymentTerm_e3f4082c-7acd-4390-85be-a9d3d03a3ea8" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfRevenueComponents_e4b7061f-5d7f-413b-8a40-3ecc7ed9f0b8" xlink:href="aal-20231231.xsd#aal_NumberOfRevenueComponents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_aal_NumberOfRevenueComponents_e4b7061f-5d7f-413b-8a40-3ecc7ed9f0b8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_5bc0bb03-8a81-4f6f-b03b-8fe6093c293a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_5bc0bb03-8a81-4f6f-b03b-8fe6093c293a" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_187d9712-15d2-4a51-8a3a-854ad3ae49a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketingAndAdvertisingExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_187d9712-15d2-4a51-8a3a-854ad3ae49a3" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_29d5cd4d-3747-4bb2-a51b-ead3f217d537" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_75ae978c-130d-47da-97be-8dddf97d94bb" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_29d5cd4d-3747-4bb2-a51b-ead3f217d537" xlink:type="arc" order="19"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofPayrollSupportProgramDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofPayrollSupportProgramDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesScheduleofPayrollSupportProgramDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnusualOrInfrequentItemLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnusualOrInfrequentItemTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:to="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_e3b7dd34-2c44-49be-a302-9fe4c5e9817e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:to="loc_dei_LegalEntityAxis_e3b7dd34-2c44-49be-a302-9fe4c5e9817e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e3b7dd34-2c44-49be-a302-9fe4c5e9817e_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_e3b7dd34-2c44-49be-a302-9fe4c5e9817e" xlink:to="loc_dei_EntityDomain_e3b7dd34-2c44-49be-a302-9fe4c5e9817e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_802a5b6c-8315-4b64-9417-7158994cb98c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_e3b7dd34-2c44-49be-a302-9fe4c5e9817e" xlink:to="loc_dei_EntityDomain_802a5b6c-8315-4b64-9417-7158994cb98c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f52de5d8-4257-42e0-94a7-2b5f9402fde3" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_802a5b6c-8315-4b64-9417-7158994cb98c" xlink:to="loc_aal_AmericanAirlinesIncMember_f52de5d8-4257-42e0-94a7-2b5f9402fde3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeAxis_3844e167-2e03-490f-b055-34d8455db6d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:to="loc_us-gaap_GovernmentAssistanceTypeAxis_3844e167-2e03-490f-b055-34d8455db6d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_3844e167-2e03-490f-b055-34d8455db6d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_3844e167-2e03-490f-b055-34d8455db6d9" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_3844e167-2e03-490f-b055-34d8455db6d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GovernmentAssistanceTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_3844e167-2e03-490f-b055-34d8455db6d9" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramOneMember_f1a9eec6-11a0-417a-a284-f0d8530fddfc" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramOneMember_f1a9eec6-11a0-417a-a284-f0d8530fddfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramTwoMember_1d110a58-ef96-48d6-8ec8-dff695370b9b" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramTwoMember_1d110a58-ef96-48d6-8ec8-dff695370b9b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramThreeMember_3a56cfe3-465f-46fe-82a5-002070c8bae0" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPayrollSupportProgramThreeMember_3a56cfe3-465f-46fe-82a5-002070c8bae0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember_810770fa-da35-4323-a839-c0af6b92c97e" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember_810770fa-da35-4323-a839-c0af6b92c97e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramOneMember_0b09df28-39de-491b-a6d6-e02edfb45bcc" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember_810770fa-da35-4323-a839-c0af6b92c97e" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramOneMember_0b09df28-39de-491b-a6d6-e02edfb45bcc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramTwoMember_09929a63-a1cd-41aa-b48e-522dbfe9b05c" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember_810770fa-da35-4323-a839-c0af6b92c97e" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramTwoMember_09929a63-a1cd-41aa-b48e-522dbfe9b05c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramThreeMember_58d12352-41c6-4ce0-a2f3-20ec9cbd4ef6" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramMember_810770fa-da35-4323-a839-c0af6b92c97e" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActGrantPayrollSupportProgramThreeMember_58d12352-41c6-4ce0-a2f3-20ec9cbd4ef6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember_aedd99f6-679e-47e9-91a7-fef1bf5510f6" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember_aedd99f6-679e-47e9-91a7-fef1bf5510f6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramOneMember_0e794e61-ff7b-4187-9bb9-cb8a2f7ba4b7" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember_aedd99f6-679e-47e9-91a7-fef1bf5510f6" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramOneMember_0e794e61-ff7b-4187-9bb9-cb8a2f7ba4b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramTwoMember_83d61ab2-9369-4752-8d5c-fb055ac11b5d" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember_aedd99f6-679e-47e9-91a7-fef1bf5510f6" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramTwoMember_83d61ab2-9369-4752-8d5c-fb055ac11b5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramThreeMember_86391220-8516-45a3-9266-b870c2360371" xlink:href="aal-20231231.xsd#aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_USDepartmentOfTheTreasuryCARESActLoansPayrollSupportProgramMember_aedd99f6-679e-47e9-91a7-fef1bf5510f6" xlink:to="loc_aal_USDepartmentOfTheTreasuryCARESActPromissoryNotesPayrollSupportProgramThreeMember_86391220-8516-45a3-9266-b870c2360371" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramWarrantsCARESActMember_44affbe4-1800-4125-b18f-e7c35cba4c69" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramWarrantsCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_df5de10e-1080-49b0-a09e-4b76a628c4af" xlink:to="loc_aal_PayrollSupportProgramWarrantsCARESActMember_44affbe4-1800-4125-b18f-e7c35cba4c69" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramOneWarrantsCARESActMember_5eae4a36-a7a3-4b1d-a97d-bbdfa632f07d" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramOneWarrantsCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_PayrollSupportProgramWarrantsCARESActMember_44affbe4-1800-4125-b18f-e7c35cba4c69" xlink:to="loc_aal_PayrollSupportProgramOneWarrantsCARESActMember_5eae4a36-a7a3-4b1d-a97d-bbdfa632f07d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramTwoWarrantsCARESActMember_5d5799e4-13fc-4938-8780-0fd7c1a6cd48" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramTwoWarrantsCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_PayrollSupportProgramWarrantsCARESActMember_44affbe4-1800-4125-b18f-e7c35cba4c69" xlink:to="loc_aal_PayrollSupportProgramTwoWarrantsCARESActMember_5d5799e4-13fc-4938-8780-0fd7c1a6cd48" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramThreeWarrantsCARESActMember_990e0893-fbc5-43ba-b25f-1bbbeeb6a03e" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramThreeWarrantsCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_PayrollSupportProgramWarrantsCARESActMember_44affbe4-1800-4125-b18f-e7c35cba4c69" xlink:to="loc_aal_PayrollSupportProgramThreeWarrantsCARESActMember_990e0893-fbc5-43ba-b25f-1bbbeeb6a03e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a23b084a-3851-422f-bf56-03d677ff6862" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_99fa99a1-db57-4a16-9bd2-e83d7bd9cc10" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a23b084a-3851-422f-bf56-03d677ff6862" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesPayableOtherPayablesMember_5dfb6f43-deae-4843-be0b-be65087f66cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NotesPayableOtherPayablesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a23b084a-3851-422f-bf56-03d677ff6862" xlink:to="loc_us-gaap_NotesPayableOtherPayablesMember_5dfb6f43-deae-4843-be0b-be65087f66cb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_9b4cb281-4189-46bf-9082-5c4317a589fb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnusualOrInfrequentItemTable_a300f160-6608-4ce1-b3c6-84cf836e8349" xlink:to="loc_us-gaap_DebtInstrumentAxis_9b4cb281-4189-46bf-9082-5c4317a589fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9b4cb281-4189-46bf-9082-5c4317a589fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_9b4cb281-4189-46bf-9082-5c4317a589fb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9b4cb281-4189-46bf-9082-5c4317a589fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0bd0e9d9-e70b-426c-bfac-237962afffc1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_9b4cb281-4189-46bf-9082-5c4317a589fb" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0bd0e9d9-e70b-426c-bfac-237962afffc1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNotesMember_d562298f-972d-4269-9cbb-6c1da19519d7" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0bd0e9d9-e70b-426c-bfac-237962afffc1" xlink:to="loc_aal_PayrollSupportProgramPromissoryNotesMember_d562298f-972d-4269-9cbb-6c1da19519d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct_b43812ca-5cca-4bca-ad45-e87fb15f5895" xlink:href="aal-20231231.xsd#aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:to="loc_aal_ProceedsFromGovernmentAssistancePayrollSupportProgramCARESAct_b43812ca-5cca-4bca-ad45-e87fb15f5895" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized_f2be8c25-f452-48e1-b824-fe0a9a787790" xlink:href="aal-20231231.xsd#aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:to="loc_aal_ClassOfWarrantOrRightNumberOfSharesCalledByWarrantsAuthorized_f2be8c25-f452-48e1-b824-fe0a9a787790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_2e109440-d290-4f41-b1f3-682b55d2f6dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:to="loc_us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_2e109440-d290-4f41-b1f3-682b55d2f6dd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_a9253eab-84fd-4043-834b-863bd5d0f71a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnusualOrInfrequentItemLineItems_a4c4e857-0c73-4b5a-913e-6a6a25bff8ad" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_a9253eab-84fd-4043-834b-863bd5d0f71a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesOperatingPropertyandEquipmentDetail" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesOperatingPropertyandEquipmentDetail"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesOperatingPropertyandEquipmentDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_07ebd145-2dac-478b-b802-16079089585a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_663dca22-4425-4118-b372-9eee26fc2cb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_07ebd145-2dac-478b-b802-16079089585a" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_663dca22-4425-4118-b372-9eee26fc2cb2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_1b0f7238-edca-4648-b851-64d33f0d58c8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_663dca22-4425-4118-b372-9eee26fc2cb2" xlink:to="loc_dei_LegalEntityAxis_1b0f7238-edca-4648-b851-64d33f0d58c8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1b0f7238-edca-4648-b851-64d33f0d58c8_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_1b0f7238-edca-4648-b851-64d33f0d58c8" xlink:to="loc_dei_EntityDomain_1b0f7238-edca-4648-b851-64d33f0d58c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1e73e131-43c7-426e-be55-1a91774c2901" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_1b0f7238-edca-4648-b851-64d33f0d58c8" xlink:to="loc_dei_EntityDomain_1e73e131-43c7-426e-be55-1a91774c2901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_654d8f89-e4ce-4ea0-8bcd-82f569b20265" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1e73e131-43c7-426e-be55-1a91774c2901" xlink:to="loc_aal_AmericanAirlinesIncMember_654d8f89-e4ce-4ea0-8bcd-82f569b20265" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d0c0c68b-d9ec-41f2-afec-38636c7f385c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_663dca22-4425-4118-b372-9eee26fc2cb2" xlink:to="loc_srt_RangeAxis_d0c0c68b-d9ec-41f2-afec-38636c7f385c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d0c0c68b-d9ec-41f2-afec-38636c7f385c_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d0c0c68b-d9ec-41f2-afec-38636c7f385c" xlink:to="loc_srt_RangeMember_d0c0c68b-d9ec-41f2-afec-38636c7f385c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e49a7ba3-3635-4c9b-9372-eab37ea1f954" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d0c0c68b-d9ec-41f2-afec-38636c7f385c" xlink:to="loc_srt_RangeMember_e49a7ba3-3635-4c9b-9372-eab37ea1f954" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_4d79f580-2c54-4a4a-958a-6d869e0b061f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e49a7ba3-3635-4c9b-9372-eab37ea1f954" xlink:to="loc_srt_MinimumMember_4d79f580-2c54-4a4a-958a-6d869e0b061f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_2d9ac52d-012f-4b07-bbce-640a444883e3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e49a7ba3-3635-4c9b-9372-eab37ea1f954" xlink:to="loc_srt_MaximumMember_2d9ac52d-012f-4b07-bbce-640a444883e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c6eeb4e-2e71-441a-9843-5eb8c2305de9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_663dca22-4425-4118-b372-9eee26fc2cb2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c6eeb4e-2e71-441a-9843-5eb8c2305de9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c6eeb4e-2e71-441a-9843-5eb8c2305de9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c6eeb4e-2e71-441a-9843-5eb8c2305de9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_8c6eeb4e-2e71-441a-9843-5eb8c2305de9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_8c6eeb4e-2e71-441a-9843-5eb8c2305de9" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AircraftEnginesAndRelatedRotablePartsMember_143518d2-bcc5-495f-a694-e802332d08f7" xlink:href="aal-20231231.xsd#aal_AircraftEnginesAndRelatedRotablePartsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:to="loc_aal_AircraftEnginesAndRelatedRotablePartsMember_143518d2-bcc5-495f-a694-e802332d08f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_6011016f-8866-4c01-aabf-cd438648efd9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BuildingAndBuildingImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_6011016f-8866-4c01-aabf-cd438648efd9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_8e05d448-1e76-4e3f-bf88-e46773f27de0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FurnitureAndFixturesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_8e05d448-1e76-4e3f-bf88-e46773f27de0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CapitalizedSoftwareMember_a50bf3a1-ee3c-4c67-83c1-c072b49821c9" xlink:href="aal-20231231.xsd#aal_CapitalizedSoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_2c169c21-0491-4552-9892-3b6eca81cfd8" xlink:to="loc_aal_CapitalizedSoftwareMember_a50bf3a1-ee3c-4c67-83c1-c072b49821c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage_c313bd10-d3d5-4310-9894-31e2cf43c7f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_07ebd145-2dac-478b-b802-16079089585a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage_c313bd10-d3d5-4310-9894-31e2cf43c7f7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_895d2d8d-0a1b-4836-af83-d5162da340b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_07ebd145-2dac-478b-b802-16079089585a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_895d2d8d-0a1b-4836-af83-d5162da340b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_f12452e0-276e-46a9-be14-646e12bd537d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_07ebd145-2dac-478b-b802-16079089585a" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_f12452e0-276e-46a9-be14-646e12bd537d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsDetail" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsDetail"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_766f314a-7b4b-42e3-bdda-c9f720422fa6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_766f314a-7b4b-42e3-bdda-c9f720422fa6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_766f314a-7b4b-42e3-bdda-c9f720422fa6" xlink:to="loc_dei_LegalEntityAxis_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4" xlink:to="loc_dei_EntityDomain_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_fd9abe81-52e1-496b-b3e5-346f6c930a8b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b18ff4b0-bdbe-42c3-b508-1ff6ec9071c4" xlink:to="loc_dei_EntityDomain_fd9abe81-52e1-496b-b3e5-346f6c930a8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_a1e48fb4-99d1-4384-bdbe-de54f2397283" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_fd9abe81-52e1-496b-b3e5-346f6c930a8b" xlink:to="loc_aal_AmericanAirlinesIncMember_a1e48fb4-99d1-4384-bdbe-de54f2397283" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c888ed8a-3a8a-4c18-a3aa-52f533221ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_766f314a-7b4b-42e3-bdda-c9f720422fa6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c888ed8a-3a8a-4c18-a3aa-52f533221ac7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c888ed8a-3a8a-4c18-a3aa-52f533221ac7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c888ed8a-3a8a-4c18-a3aa-52f533221ac7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c888ed8a-3a8a-4c18-a3aa-52f533221ac7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c888ed8a-3a8a-4c18-a3aa-52f533221ac7" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirportTakeOffAndLandingSlotsMember_3e236fdb-541d-404e-9520-2c1e8881c56e" xlink:href="aal-20231231.xsd#aal_AirportTakeOffAndLandingSlotsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_aal_AirportTakeOffAndLandingSlotsMember_3e236fdb-541d-404e-9520-2c1e8881c56e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_eaf9d3b8-2609-4f3a-aab1-f7e001d13d5d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_us-gaap_CustomerRelationshipsMember_eaf9d3b8-2609-4f3a-aab1-f7e001d13d5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_d7e02c12-fc47-40e5-b740-9a7a46bedef1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketingRelatedIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_d7e02c12-fc47-40e5-b740-9a7a46bedef1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_2d93e284-9df7-4c88-8d52-c4ce91c8ed42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_us-gaap_TradeNamesMember_2d93e284-9df7-4c88-8d52-c4ce91c8ed42" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirportGateLeaseholdRightsMember_cbae5f1b-09d6-4250-9cea-a7d20381239d" xlink:href="aal-20231231.xsd#aal_AirportGateLeaseholdRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_aal_AirportGateLeaseholdRightsMember_cbae5f1b-09d6-4250-9cea-a7d20381239d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DomesticAirportSlotsAndAirportGateLeaseholdRightsMember_0b92f542-2423-4421-8a1b-a0a8594edddf" xlink:href="aal-20231231.xsd#aal_DomesticAirportSlotsAndAirportGateLeaseholdRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_7b4e41f8-10d4-4b57-a99a-b851d99edb58" xlink:to="loc_aal_DomesticAirportSlotsAndAirportGateLeaseholdRightsMember_0b92f542-2423-4421-8a1b-a0a8594edddf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_c67a4d78-ccc0-46ef-8c2c-64c9936eecaf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_c67a4d78-ccc0-46ef-8c2c-64c9936eecaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_52ba7591-72e6-4075-8f40-04e77782ef96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_52ba7591-72e6-4075-8f40-04e77782ef96" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e241cb59-22ff-4a43-a1d0-1563f78c50f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e241cb59-22ff-4a43-a1d0-1563f78c50f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_6138b3e1-f86e-4147-9177-64fe1a04b35e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_7e888658-d072-455a-868c-e468cfa0ef4b" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_6138b3e1-f86e-4147-9177-64fe1a04b35e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsAmortizationExpenseDetail" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsAmortizationExpenseDetail"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesDefiniteLivedIntangibleAssetsAmortizationExpenseDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_5de31605-6287-4989-a9c9-b48be6bb9f20" xlink:href="aal-20231231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_5de31605-6287-4989-a9c9-b48be6bb9f20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ccf82d66-c454-49ee-a85a-daf6d128cc2b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_5de31605-6287-4989-a9c9-b48be6bb9f20" xlink:to="loc_dei_LegalEntityAxis_ccf82d66-c454-49ee-a85a-daf6d128cc2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ccf82d66-c454-49ee-a85a-daf6d128cc2b_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ccf82d66-c454-49ee-a85a-daf6d128cc2b" xlink:to="loc_dei_EntityDomain_ccf82d66-c454-49ee-a85a-daf6d128cc2b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e286199c-f252-4b72-98e3-aa88b47b8723" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ccf82d66-c454-49ee-a85a-daf6d128cc2b" xlink:to="loc_dei_EntityDomain_e286199c-f252-4b72-98e3-aa88b47b8723" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_b21973ec-4e99-41d3-895e-67f4cf9239f0" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e286199c-f252-4b72-98e3-aa88b47b8723" xlink:to="loc_aal_AmericanAirlinesIncMember_b21973ec-4e99-41d3-895e-67f4cf9239f0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_010a5539-228a-4303-97a6-a210e190da99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_010a5539-228a-4303-97a6-a210e190da99" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_2c1f37c8-28dd-498c-9cc2-3f5fd0e7ff72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_2c1f37c8-28dd-498c-9cc2-3f5fd0e7ff72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0f5cee95-42a5-40e1-95c8-8d1c810af758" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_0f5cee95-42a5-40e1-95c8-8d1c810af758" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8669573b-60b0-4ebc-94c6-a3ba18f7fafa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_8669573b-60b0-4ebc-94c6-a3ba18f7fafa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_a833a2c3-7f76-459d-bb85-c209fb951e22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_a833a2c3-7f76-459d-bb85-c209fb951e22" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_641a2504-e30d-41d1-8451-9341e9dc6705" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_641a2504-e30d-41d1-8451-9341e9dc6705" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b0b16a3f-acde-4151-924d-2631366af1ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_1c98f291-2aa1-4666-8e6a-6fce5fa3254e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_b0b16a3f-acde-4151-924d-2631366af1ec" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantCategoriesofReportedOperatingRevenuesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantCategoriesofReportedOperatingRevenuesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantCategoriesofReportedOperatingRevenuesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_602e575b-1c56-4743-b2da-74207695b2df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_1e384afc-c505-4aaa-9253-952d88f432c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_602e575b-1c56-4743-b2da-74207695b2df" xlink:to="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_1e384afc-c505-4aaa-9253-952d88f432c9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_cb8bd853-f827-42d0-8869-88400f991931" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_1e384afc-c505-4aaa-9253-952d88f432c9" xlink:to="loc_dei_LegalEntityAxis_cb8bd853-f827-42d0-8869-88400f991931" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cb8bd853-f827-42d0-8869-88400f991931_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_cb8bd853-f827-42d0-8869-88400f991931" xlink:to="loc_dei_EntityDomain_cb8bd853-f827-42d0-8869-88400f991931_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6b647cf1-0179-46c6-94b1-4826568da275" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_cb8bd853-f827-42d0-8869-88400f991931" xlink:to="loc_dei_EntityDomain_6b647cf1-0179-46c6-94b1-4826568da275" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_452881e4-2a93-4924-a99e-7d341b5feaf4" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6b647cf1-0179-46c6-94b1-4826568da275" xlink:to="loc_aal_AmericanAirlinesIncMember_452881e4-2a93-4924-a99e-7d341b5feaf4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_4d593554-592b-447d-b514-9fd578fb1925" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEntityWideInformationRevenueFromExternalCustomersByProductsAndServicesTable_1e384afc-c505-4aaa-9253-952d88f432c9" xlink:to="loc_srt_ProductOrServiceAxis_4d593554-592b-447d-b514-9fd578fb1925" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4d593554-592b-447d-b514-9fd578fb1925_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_4d593554-592b-447d-b514-9fd578fb1925" xlink:to="loc_srt_ProductsAndServicesDomain_4d593554-592b-447d-b514-9fd578fb1925_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d18474f8-b369-4588-83c7-af665862131a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_4d593554-592b-447d-b514-9fd578fb1925" xlink:to="loc_srt_ProductsAndServicesDomain_d18474f8-b369-4588-83c7-af665862131a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassengerMember_2912e086-8c42-40a8-baab-2187c378528c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PassengerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d18474f8-b369-4588-83c7-af665862131a" xlink:to="loc_us-gaap_PassengerMember_2912e086-8c42-40a8-baab-2187c378528c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PassengerTravelMember_42fa4436-038a-4f29-9dd5-61bc8e1f6f84" xlink:href="aal-20231231.xsd#aal_PassengerTravelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PassengerMember_2912e086-8c42-40a8-baab-2187c378528c" xlink:to="loc_aal_PassengerTravelMember_42fa4436-038a-4f29-9dd5-61bc8e1f6f84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramTravelRedemptionsMember_3a7b579a-a004-4aea-add2-df51d362968c" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramTravelRedemptionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PassengerMember_2912e086-8c42-40a8-baab-2187c378528c" xlink:to="loc_aal_LoyaltyProgramTravelRedemptionsMember_3a7b579a-a004-4aea-add2-df51d362968c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CargoAndFreightMember_8f2eee1a-3f19-47d1-9ed9-74abf14aa979" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CargoAndFreightMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d18474f8-b369-4588-83c7-af665862131a" xlink:to="loc_us-gaap_CargoAndFreightMember_8f2eee1a-3f19-47d1-9ed9-74abf14aa979" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductAndServiceOtherMember_39ed1bd9-5f2c-4184-a55c-07318bb09e7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProductAndServiceOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_d18474f8-b369-4588-83c7-af665862131a" xlink:to="loc_us-gaap_ProductAndServiceOtherMember_39ed1bd9-5f2c-4184-a55c-07318bb09e7b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMarketingServicesMember_077af0ea-c8b1-4a9f-b702-0c1350062e63" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMarketingServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductAndServiceOtherMember_39ed1bd9-5f2c-4184-a55c-07318bb09e7b" xlink:to="loc_aal_LoyaltyProgramMarketingServicesMember_077af0ea-c8b1-4a9f-b702-0c1350062e63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OtherRevenueMember_c3cd1a9c-dafa-4a96-9dc3-a49afb018622" xlink:href="aal-20231231.xsd#aal_OtherRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductAndServiceOtherMember_39ed1bd9-5f2c-4184-a55c-07318bb09e7b" xlink:to="loc_aal_OtherRevenueMember_c3cd1a9c-dafa-4a96-9dc3-a49afb018622" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_452767e5-3e65-44c5-9d58-32efde0f15fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_602e575b-1c56-4743-b2da-74207695b2df" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_452767e5-3e65-44c5-9d58-32efde0f15fa" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPassengerRevenuebyGeographicRegionDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesPassengerRevenuebyGeographicRegionDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesPassengerRevenuebyGeographicRegionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineDestinationDisclosureLineItems_35cd31c8-242a-44a3-b952-30783c2c3c80" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineDestinationDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineDestinationTable_77aea051-f970-45c6-a66c-5b089610128a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineDestinationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AirlineDestinationDisclosureLineItems_35cd31c8-242a-44a3-b952-30783c2c3c80" xlink:to="loc_us-gaap_AirlineDestinationTable_77aea051-f970-45c6-a66c-5b089610128a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_96cfe9c9-cfeb-4af4-9348-173c70f9e06b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AirlineDestinationTable_77aea051-f970-45c6-a66c-5b089610128a" xlink:to="loc_dei_LegalEntityAxis_96cfe9c9-cfeb-4af4-9348-173c70f9e06b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_96cfe9c9-cfeb-4af4-9348-173c70f9e06b_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_96cfe9c9-cfeb-4af4-9348-173c70f9e06b" xlink:to="loc_dei_EntityDomain_96cfe9c9-cfeb-4af4-9348-173c70f9e06b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ecd95f17-e32b-47d8-8bce-ddc2e89f799e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_96cfe9c9-cfeb-4af4-9348-173c70f9e06b" xlink:to="loc_dei_EntityDomain_ecd95f17-e32b-47d8-8bce-ddc2e89f799e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_be614e0d-83a5-4e89-9adc-7ab291cd45d0" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ecd95f17-e32b-47d8-8bce-ddc2e89f799e" xlink:to="loc_aal_AmericanAirlinesIncMember_be614e0d-83a5-4e89-9adc-7ab291cd45d0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AirlineDestinationTable_77aea051-f970-45c6-a66c-5b089610128a" xlink:to="loc_srt_ProductOrServiceAxis_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0" xlink:to="loc_srt_ProductsAndServicesDomain_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e8230deb-cb78-4a0f-94d2-388969391e86" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f95876e9-e2e4-40fa-9ea5-d7c3bae1efb0" xlink:to="loc_srt_ProductsAndServicesDomain_e8230deb-cb78-4a0f-94d2-388969391e86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PassengerMember_ab28b42d-a57a-4669-89dd-bba622904085" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PassengerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e8230deb-cb78-4a0f-94d2-388969391e86" xlink:to="loc_us-gaap_PassengerMember_ab28b42d-a57a-4669-89dd-bba622904085" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineDestinationsAxis_377a5e8e-87bb-46e9-a3a4-fac4a74ea503" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineDestinationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AirlineDestinationTable_77aea051-f970-45c6-a66c-5b089610128a" xlink:to="loc_us-gaap_AirlineDestinationsAxis_377a5e8e-87bb-46e9-a3a4-fac4a74ea503" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineDestinationDomain_377a5e8e-87bb-46e9-a3a4-fac4a74ea503_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineDestinationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AirlineDestinationsAxis_377a5e8e-87bb-46e9-a3a4-fac4a74ea503" xlink:to="loc_us-gaap_AirlineDestinationDomain_377a5e8e-87bb-46e9-a3a4-fac4a74ea503_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineDestinationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AirlineDestinationsAxis_377a5e8e-87bb-46e9-a3a4-fac4a74ea503" xlink:to="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticDestinationMember_27ff3a6e-4392-4a39-b3e7-cc1bbaba8bb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DomesticDestinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:to="loc_us-gaap_DomesticDestinationMember_27ff3a6e-4392-4a39-b3e7-cc1bbaba8bb2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LatinAmericaDestinationMember_dc9acbe5-0bc4-45bd-a154-ee812c6b5671" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LatinAmericaDestinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:to="loc_us-gaap_LatinAmericaDestinationMember_dc9acbe5-0bc4-45bd-a154-ee812c6b5671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AtlanticDestinationMember_0c48eaad-0657-45a4-b263-2118bb66874f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AtlanticDestinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:to="loc_us-gaap_AtlanticDestinationMember_0c48eaad-0657-45a4-b263-2118bb66874f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PacificDestinationMember_c0a600ab-ed83-4c55-8970-90b7a992c18c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PacificDestinationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_84b08d07-6747-4633-9b8f-d009d87ec72e" xlink:to="loc_us-gaap_PacificDestinationMember_c0a600ab-ed83-4c55-8970-90b7a992c18c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f0294db8-b177-400c-b027-faf0e36687f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDisclosureLineItems_35cd31c8-242a-44a3-b952-30783c2c3c80" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_f0294db8-b177-400c-b027-faf0e36687f8" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantContractLiabilitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantContractLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesSignificantContractLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_a04bf847-d7e6-4acc-9499-dc723d348160" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_4746b35a-20e7-482e-88e2-2d5e92fd55c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_a04bf847-d7e6-4acc-9499-dc723d348160" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_4746b35a-20e7-482e-88e2-2d5e92fd55c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_26a3749a-1931-4748-a5b3-546a2079a74c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4746b35a-20e7-482e-88e2-2d5e92fd55c5" xlink:to="loc_dei_LegalEntityAxis_26a3749a-1931-4748-a5b3-546a2079a74c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_26a3749a-1931-4748-a5b3-546a2079a74c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_26a3749a-1931-4748-a5b3-546a2079a74c" xlink:to="loc_dei_EntityDomain_26a3749a-1931-4748-a5b3-546a2079a74c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_87f767a1-d765-4aaa-9699-a90cc389f4bc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_26a3749a-1931-4748-a5b3-546a2079a74c" xlink:to="loc_dei_EntityDomain_87f767a1-d765-4aaa-9699-a90cc389f4bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_20eb61c8-16b1-4470-a6ba-b628c1b8183a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_87f767a1-d765-4aaa-9699-a90cc389f4bc" xlink:to="loc_aal_AmericanAirlinesIncMember_20eb61c8-16b1-4470-a6ba-b628c1b8183a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_fe271d05-3d02-4f27-befd-05faa068243c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4746b35a-20e7-482e-88e2-2d5e92fd55c5" xlink:to="loc_srt_ProductOrServiceAxis_fe271d05-3d02-4f27-befd-05faa068243c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_fe271d05-3d02-4f27-befd-05faa068243c_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_fe271d05-3d02-4f27-befd-05faa068243c" xlink:to="loc_srt_ProductsAndServicesDomain_fe271d05-3d02-4f27-befd-05faa068243c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_bea0d2e0-d393-47ab-9926-35e5d7f4242c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_fe271d05-3d02-4f27-befd-05faa068243c" xlink:to="loc_srt_ProductsAndServicesDomain_bea0d2e0-d393-47ab-9926-35e5d7f4242c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_60309408-2fb0-4783-825d-2d46a757f236" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_bea0d2e0-d393-47ab-9926-35e5d7f4242c" xlink:to="loc_aal_LoyaltyProgramMember_60309408-2fb0-4783-825d-2d46a757f236" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirTrafficMember_cc75b0b5-70f0-4e88-8a5b-64980c38127e" xlink:href="aal-20231231.xsd#aal_AirTrafficMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_bea0d2e0-d393-47ab-9926-35e5d7f4242c" xlink:to="loc_aal_AirTrafficMember_cc75b0b5-70f0-4e88-8a5b-64980c38127e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_03d6033b-58cd-4f37-83d0-32fd3d2fc9d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_a04bf847-d7e6-4acc-9499-dc723d348160" xlink:to="loc_us-gaap_ContractWithCustomerLiability_03d6033b-58cd-4f37-83d0-32fd3d2fc9d6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesChangesinLoyaltyProgramLiabilityDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesChangesinLoyaltyProgramLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesChangesinLoyaltyProgramLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_2c7129f4-e22f-484a-87d4-1c92adc78947" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_6b5e2637-53d4-4f8e-a283-7977705a277c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2c7129f4-e22f-484a-87d4-1c92adc78947" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_6b5e2637-53d4-4f8e-a283-7977705a277c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_fbda0cfb-25c6-48aa-bb48-d344b067a6cf" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_6b5e2637-53d4-4f8e-a283-7977705a277c" xlink:to="loc_dei_LegalEntityAxis_fbda0cfb-25c6-48aa-bb48-d344b067a6cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_fbda0cfb-25c6-48aa-bb48-d344b067a6cf_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_fbda0cfb-25c6-48aa-bb48-d344b067a6cf" xlink:to="loc_dei_EntityDomain_fbda0cfb-25c6-48aa-bb48-d344b067a6cf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e6a40981-c3c6-4e11-b2fa-187618724404" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_fbda0cfb-25c6-48aa-bb48-d344b067a6cf" xlink:to="loc_dei_EntityDomain_e6a40981-c3c6-4e11-b2fa-187618724404" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_d388eda1-80ab-4089-b9aa-3b7342fe6d36" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e6a40981-c3c6-4e11-b2fa-187618724404" xlink:to="loc_aal_AmericanAirlinesIncMember_d388eda1-80ab-4089-b9aa-3b7342fe6d36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_624c5e2e-4034-4d07-9c3c-90b9b7db064d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_6b5e2637-53d4-4f8e-a283-7977705a277c" xlink:to="loc_srt_ProductOrServiceAxis_624c5e2e-4034-4d07-9c3c-90b9b7db064d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_624c5e2e-4034-4d07-9c3c-90b9b7db064d_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_624c5e2e-4034-4d07-9c3c-90b9b7db064d" xlink:to="loc_srt_ProductsAndServicesDomain_624c5e2e-4034-4d07-9c3c-90b9b7db064d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e1224fc7-e21b-4c24-924d-37777b1c1896" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_624c5e2e-4034-4d07-9c3c-90b9b7db064d" xlink:to="loc_srt_ProductsAndServicesDomain_e1224fc7-e21b-4c24-924d-37777b1c1896" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LoyaltyProgramMember_62cdfcc6-c2de-4f72-8803-00316f5a4a29" xlink:href="aal-20231231.xsd#aal_LoyaltyProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e1224fc7-e21b-4c24-924d-37777b1c1896" xlink:to="loc_aal_LoyaltyProgramMember_62cdfcc6-c2de-4f72-8803-00316f5a4a29" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MovementInContractWithCustomerLiabilityRollForward_8e0a3b36-5cbc-41f8-bcfe-e5c353d4732a" xlink:href="aal-20231231.xsd#aal_MovementInContractWithCustomerLiabilityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2c7129f4-e22f-484a-87d4-1c92adc78947" xlink:to="loc_aal_MovementInContractWithCustomerLiabilityRollForward_8e0a3b36-5cbc-41f8-bcfe-e5c353d4732a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_413cfaba-d173-49f6-a75f-49fb07648f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_MovementInContractWithCustomerLiabilityRollForward_8e0a3b36-5cbc-41f8-bcfe-e5c353d4732a" xlink:to="loc_us-gaap_ContractWithCustomerLiability_413cfaba-d173-49f6-a75f-49fb07648f2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ContractwithCustomerLiabilityIncreasefromDeferralOfRevenue_5631aa6f-7e0f-44e2-b655-bf680924ee9e" xlink:href="aal-20231231.xsd#aal_ContractwithCustomerLiabilityIncreasefromDeferralOfRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_MovementInContractWithCustomerLiabilityRollForward_8e0a3b36-5cbc-41f8-bcfe-e5c353d4732a" xlink:to="loc_aal_ContractwithCustomerLiabilityIncreasefromDeferralOfRevenue_5631aa6f-7e0f-44e2-b655-bf680924ee9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_8621d202-5750-4fbf-b55d-b07ee7fd4149" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_MovementInContractWithCustomerLiabilityRollForward_8e0a3b36-5cbc-41f8-bcfe-e5c353d4732a" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_8621d202-5750-4fbf-b55d-b07ee7fd4149" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_c291edca-3440-45cb-967e-8aa24b5bb359" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InactivePeriodBeforeExpirationOfMileageCredits_f6cd1b48-80f7-4ad4-8dfd-f5c6b1c83394" xlink:href="aal-20231231.xsd#aal_InactivePeriodBeforeExpirationOfMileageCredits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2c7129f4-e22f-484a-87d4-1c92adc78947" xlink:to="loc_aal_InactivePeriodBeforeExpirationOfMileageCredits_f6cd1b48-80f7-4ad4-8dfd-f5c6b1c83394" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_0bb60ce1-acdf-4e91-93ec-c689eb7f2148" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2c7129f4-e22f-484a-87d4-1c92adc78947" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_0bb60ce1-acdf-4e91-93ec-c689eb7f2148" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesRegionalExpensesDetail" xlink:type="simple" xlink:href="aal-20231231.xsd#BasisofPresentationandSummaryofSignificantAccountingPoliciesRegionalExpensesDetail"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisofPresentationandSummaryofSignificantAccountingPoliciesRegionalExpensesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:href="aal-20231231.xsd#aal_RegionalExpensesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:href="aal-20231231.xsd#aal_RegionalExpensesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:to="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_020445bc-db2c-4d90-90b3-425f5098cfb0" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:to="loc_dei_LegalEntityAxis_020445bc-db2c-4d90-90b3-425f5098cfb0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_020445bc-db2c-4d90-90b3-425f5098cfb0_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_020445bc-db2c-4d90-90b3-425f5098cfb0" xlink:to="loc_dei_EntityDomain_020445bc-db2c-4d90-90b3-425f5098cfb0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9e4825a7-4af2-4d38-b18f-5fe9d68feceb" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_020445bc-db2c-4d90-90b3-425f5098cfb0" xlink:to="loc_dei_EntityDomain_9e4825a7-4af2-4d38-b18f-5fe9d68feceb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_86d60b6a-6606-4545-a0e4-7261f7f89c9e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9e4825a7-4af2-4d38-b18f-5fe9d68feceb" xlink:to="loc_aal_AmericanAirlinesIncMember_86d60b6a-6606-4545-a0e4-7261f7f89c9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_051d74b9-1009-4a32-bd46-79ecb60f9297" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:to="loc_srt_ProductOrServiceAxis_051d74b9-1009-4a32-bd46-79ecb60f9297" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_051d74b9-1009-4a32-bd46-79ecb60f9297_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_051d74b9-1009-4a32-bd46-79ecb60f9297" xlink:to="loc_srt_ProductsAndServicesDomain_051d74b9-1009-4a32-bd46-79ecb60f9297_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5bedc02a-ef2a-4173-a229-137d577e6626" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_051d74b9-1009-4a32-bd46-79ecb60f9297" xlink:to="loc_srt_ProductsAndServicesDomain_5bedc02a-ef2a-4173-a229-137d577e6626" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegionalCarrierMember_9cc34c9c-bd8f-4321-b8c4-913d7e3c9a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RegionalCarrierMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5bedc02a-ef2a-4173-a229-137d577e6626" xlink:to="loc_us-gaap_RegionalCarrierMember_9cc34c9c-bd8f-4321-b8c4-913d7e3c9a8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_60b695a2-7246-4485-8d0f-caac32651c16" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:to="loc_srt_CounterpartyNameAxis_60b695a2-7246-4485-8d0f-caac32651c16" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_60b695a2-7246-4485-8d0f-caac32651c16_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_60b695a2-7246-4485-8d0f-caac32651c16" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_60b695a2-7246-4485-8d0f-caac32651c16_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_50470f22-29c9-4b10-86b5-af04c3cc7cbf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_60b695a2-7246-4485-8d0f-caac32651c16" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_50470f22-29c9-4b10-86b5-af04c3cc7cbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RepublicAirlineIncMember_9f030f4b-87ed-475a-a003-15bddae8e65f" xlink:href="aal-20231231.xsd#aal_RepublicAirlineIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_50470f22-29c9-4b10-86b5-af04c3cc7cbf" xlink:to="loc_aal_RepublicAirlineIncMember_9f030f4b-87ed-475a-a003-15bddae8e65f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_a751faa9-8b10-4fba-9eac-4c47d8e3f589" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_92cbc1cf-21ff-446b-8837-666ac5ca5a97" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_b939fe8d-a2f8-4f5a-a8db-abe578dcb38c" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_92cbc1cf-21ff-446b-8837-666ac5ca5a97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RepublicAirwaysHoldingsInc.Member_584d9277-ce15-495a-a352-22b17a01fce5" xlink:href="aal-20231231.xsd#aal_RepublicAirwaysHoldingsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_92cbc1cf-21ff-446b-8837-666ac5ca5a97" xlink:to="loc_aal_RepublicAirwaysHoldingsInc.Member_584d9277-ce15-495a-a352-22b17a01fce5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_c40bd0aa-f6aa-4062-9a17-80ee7b0f145e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:to="loc_us-gaap_DepreciationAndAmortization_c40bd0aa-f6aa-4062-9a17-80ee7b0f145e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AircraftRental_47da5c89-f671-4e41-be8d-9893fd539cde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AircraftRental"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:to="loc_us-gaap_AircraftRental_47da5c89-f671-4e41-be8d-9893fd539cde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_3cbec454-949e-4c20-b549-a9ad1f026fe2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_3cbec454-949e-4c20-b549-a9ad1f026fe2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_f92201ac-8acc-430d-981d-041209340863" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_cc5de8ce-4fc0-4916-9c79-78fee7753bce" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_f92201ac-8acc-430d-981d-041209340863" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsNetDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#SpecialItemsNetDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestructuringCostAndReserveLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_db68b484-362b-4671-8ee6-a4d085a76e52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_db68b484-362b-4671-8ee6-a4d085a76e52" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_c19b783b-88d9-4b2b-9405-843e615fb830" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_db68b484-362b-4671-8ee6-a4d085a76e52" xlink:to="loc_dei_LegalEntityAxis_c19b783b-88d9-4b2b-9405-843e615fb830" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c19b783b-88d9-4b2b-9405-843e615fb830_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_c19b783b-88d9-4b2b-9405-843e615fb830" xlink:to="loc_dei_EntityDomain_c19b783b-88d9-4b2b-9405-843e615fb830_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9ccbb5a6-fd5e-4148-9233-2d3880088f28" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_c19b783b-88d9-4b2b-9405-843e615fb830" xlink:to="loc_dei_EntityDomain_9ccbb5a6-fd5e-4148-9233-2d3880088f28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_0eb68fec-5666-4465-9e1a-ccb65529c06e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9ccbb5a6-fd5e-4148-9233-2d3880088f28" xlink:to="loc_aal_AmericanAirlinesIncMember_0eb68fec-5666-4465-9e1a-ccb65529c06e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_65bfcb34-8554-4c92-b713-13d3920c0219" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_db68b484-362b-4671-8ee6-a4d085a76e52" xlink:to="loc_srt_ProductOrServiceAxis_65bfcb34-8554-4c92-b713-13d3920c0219" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_65bfcb34-8554-4c92-b713-13d3920c0219_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_65bfcb34-8554-4c92-b713-13d3920c0219" xlink:to="loc_srt_ProductsAndServicesDomain_65bfcb34-8554-4c92-b713-13d3920c0219_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5bc818e3-f2c7-4354-aaa9-8f85c7c80dc4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_65bfcb34-8554-4c92-b713-13d3920c0219" xlink:to="loc_srt_ProductsAndServicesDomain_5bc818e3-f2c7-4354-aaa9-8f85c7c80dc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MainlineMember_e2c0645f-a173-402f-83c5-3797b1df0ec0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MainlineMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5bc818e3-f2c7-4354-aaa9-8f85c7c80dc4" xlink:to="loc_us-gaap_MainlineMember_e2c0645f-a173-402f-83c5-3797b1df0ec0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegionalCarrierMember_1a8290e8-5f89-4446-a252-6b18fd270c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RegionalCarrierMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5bc818e3-f2c7-4354-aaa9-8f85c7c80dc4" xlink:to="loc_us-gaap_RegionalCarrierMember_1a8290e8-5f89-4446-a252-6b18fd270c4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_0510dbe9-ab9c-4e66-bf42-c2246bf24303" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0510dbe9-ab9c-4e66-bf42-c2246bf24303_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_760b18b7-a458-4379-9b45-2128ae451c5e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_aab738fb-5c03-4422-8162-a19203d0f876" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementAxis_0ec1df22-9ad3-4dd3-b0da-b551152ad10f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_db68b484-362b-4671-8ee6-a4d085a76e52" xlink:to="loc_us-gaap_CollectiveBargainingArrangementAxis_0ec1df22-9ad3-4dd3-b0da-b551152ad10f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementDomain_0ec1df22-9ad3-4dd3-b0da-b551152ad10f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollectiveBargainingArrangementAxis_0ec1df22-9ad3-4dd3-b0da-b551152ad10f" xlink:to="loc_us-gaap_CollectiveBargainingArrangementDomain_0ec1df22-9ad3-4dd3-b0da-b551152ad10f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementDomain_e1c1cd85-d343-4295-a78d-1040d5ce0e43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollectiveBargainingArrangementAxis_0ec1df22-9ad3-4dd3-b0da-b551152ad10f" xlink:to="loc_us-gaap_CollectiveBargainingArrangementDomain_e1c1cd85-d343-4295-a78d-1040d5ce0e43" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AlliedPilotsAssociationMember_5e2c1ff0-8209-44f8-aa9d-81e05bad1936" xlink:href="aal-20231231.xsd#aal_AlliedPilotsAssociationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollectiveBargainingArrangementDomain_e1c1cd85-d343-4295-a78d-1040d5ce0e43" xlink:to="loc_aal_AlliedPilotsAssociationMember_5e2c1ff0-8209-44f8-aa9d-81e05bad1936" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLaborRelatedExpenses_f92b4a55-5078-4de7-8264-faea54b72219" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLaborRelatedExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_us-gaap_OtherLaborRelatedExpenses_f92b4a55-5078-4de7-8264-faea54b72219" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeveranceCosts1_cd08cb91-d821-4fb7-9cf3-d5ca48fc0e56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeveranceCosts1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_us-gaap_SeveranceCosts1_cd08cb91-d821-4fb7-9cf3-d5ca48fc0e56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_FlightEquipmentOperatingLeaseAndInventoryImpairmentLoss_31676b79-5351-4f5c-af20-441c09255f2e" xlink:href="aal-20231231.xsd#aal_FlightEquipmentOperatingLeaseAndInventoryImpairmentLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_FlightEquipmentOperatingLeaseAndInventoryImpairmentLoss_31676b79-5351-4f5c-af20-441c09255f2e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossRelatedToLitigationSettlement_9fef1543-4cee-46a8-a47f-433da26e9f05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossRelatedToLitigationSettlement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_us-gaap_GainLossRelatedToLitigationSettlement_9fef1543-4cee-46a8-a47f-433da26e9f05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramGrant_4bc6bfd4-d147-40d5-9b50-41e2188f7c99" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramGrant"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_PayrollSupportProgramGrant_4bc6bfd4-d147-40d5-9b50-41e2188f7c99" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OtherOperatingSpecialChargesNet_c9b19468-0610-48a9-b010-8b1ce52bc010" xlink:href="aal-20231231.xsd#aal_OtherOperatingSpecialChargesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_OtherOperatingSpecialChargesNet_c9b19468-0610-48a9-b010-8b1ce52bc010" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestructuringAndOtherNet_ad41b720-2f0c-4ccb-a06c-006bee7d84a4" xlink:href="aal-20231231.xsd#aal_RestructuringAndOtherNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_RestructuringAndOtherNet_ad41b720-2f0c-4ccb-a06c-006bee7d84a4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PilotRetentionCost_7446cf97-15bd-4f60-8a36-834fb8bc081c" xlink:href="aal-20231231.xsd#aal_PilotRetentionCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_PilotRetentionCost_7446cf97-15bd-4f60-8a36-834fb8bc081c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_23bb34c9-5920-49b0-b5ad-fd41fed39444" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_23bb34c9-5920-49b0-b5ad-fd41fed39444" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtRefinancingDebtExtinguishmentAndOtherExpense_c68e3289-2eb4-4002-86d7-58eae6866a97" xlink:href="aal-20231231.xsd#aal_DebtRefinancingDebtExtinguishmentAndOtherExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_DebtRefinancingDebtExtinguishmentAndOtherExpense_c68e3289-2eb4-4002-86d7-58eae6866a97" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NonoperatingSpecialItemsNet_59164c6c-ea2e-42a5-9d57-9dd31c0d3ab8" xlink:href="aal-20231231.xsd#aal_NonoperatingSpecialItemsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_NonoperatingSpecialItemsNet_59164c6c-ea2e-42a5-9d57-9dd31c0d3ab8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxSpecialItemsNet_e6714457-4e45-49af-8d06-7e553b430eea" xlink:href="aal-20231231.xsd#aal_IncomeTaxSpecialItemsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_IncomeTaxSpecialItemsNet_e6714457-4e45-49af-8d06-7e553b430eea" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementOneTimePaymentAmount_13d934b3-b93f-44e1-8e57-edbfc5600119" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementOneTimePaymentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_CollectiveBargainingAgreementOneTimePaymentAmount_13d934b3-b93f-44e1-8e57-edbfc5600119" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems_21cd07c3-6724-4d5f-9379-c37da79ecddf" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_007685e9-dd35-4511-a27d-8031c2745dbd" xlink:to="loc_aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems_21cd07c3-6724-4d5f-9379-c37da79ecddf" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EarningsLossPerCommonShareDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EarningsLossPerCommonShareDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EarningsLossPerCommonShareDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_54ebaf63-dcc9-4b3f-9632-78f619d6b320" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ceb86837-0bc9-4336-aa66-edd601111b31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_54ebaf63-dcc9-4b3f-9632-78f619d6b320" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ceb86837-0bc9-4336-aa66-edd601111b31" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bd611f25-49b3-4448-861f-f561746a8354" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ceb86837-0bc9-4336-aa66-edd601111b31" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bd611f25-49b3-4448-861f-f561746a8354" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bd611f25-49b3-4448-861f-f561746a8354_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bd611f25-49b3-4448-861f-f561746a8354" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_bd611f25-49b3-4448-861f-f561746a8354_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f6dffbbc-7739-4c7c-a5a5-2a814f6d719d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_bd611f25-49b3-4448-861f-f561746a8354" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f6dffbbc-7739-4c7c-a5a5-2a814f6d719d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_8d854512-c106-4e0a-9f98-619852c449da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f6dffbbc-7739-4c7c-a5a5-2a814f6d719d" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_8d854512-c106-4e0a-9f98-619852c449da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_68a531f5-80ef-489b-a69a-2b220f77b577" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_f6dffbbc-7739-4c7c-a5a5-2a814f6d719d" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_68a531f5-80ef-489b-a69a-2b220f77b577" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a2611264-9b8b-41ca-9b4d-85b634aa3ccd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ceb86837-0bc9-4336-aa66-edd601111b31" xlink:to="loc_us-gaap_DebtInstrumentAxis_a2611264-9b8b-41ca-9b4d-85b634aa3ccd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a2611264-9b8b-41ca-9b4d-85b634aa3ccd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a2611264-9b8b-41ca-9b4d-85b634aa3ccd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a2611264-9b8b-41ca-9b4d-85b634aa3ccd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_478a2aa1-3ee9-4aa9-bae0-ec11d6db557f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a2611264-9b8b-41ca-9b4d-85b634aa3ccd" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_478a2aa1-3ee9-4aa9-bae0-ec11d6db557f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_008bef92-e51b-4437-8c7c-fde39606e141" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_478a2aa1-3ee9-4aa9-bae0-ec11d6db557f" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_008bef92-e51b-4437-8c7c-fde39606e141" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_7b48e0d5-3e25-4943-b7e9-b921b2712f4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_ceb86837-0bc9-4336-aa66-edd601111b31" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_7b48e0d5-3e25-4943-b7e9-b921b2712f4f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_7b48e0d5-3e25-4943-b7e9-b921b2712f4f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7b48e0d5-3e25-4943-b7e9-b921b2712f4f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_7b48e0d5-3e25-4943-b7e9-b921b2712f4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8eaefb16-115c-400d-a208-ba259010602c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_7b48e0d5-3e25-4943-b7e9-b921b2712f4f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8eaefb16-115c-400d-a208-ba259010602c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_d8802998-79ed-42db-90ee-fe10bd7de3b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8eaefb16-115c-400d-a208-ba259010602c" xlink:to="loc_us-gaap_SeniorNotesMember_d8802998-79ed-42db-90ee-fe10bd7de3b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_83d6c747-c85a-47fe-9eca-66116e94434f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_54ebaf63-dcc9-4b3f-9632-78f619d6b320" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_83d6c747-c85a-47fe-9eca-66116e94434f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e54c89a2-2c42-43aa-99dd-b04cdb75bd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_54ebaf63-dcc9-4b3f-9632-78f619d6b320" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_e54c89a2-2c42-43aa-99dd-b04cdb75bd2b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsofLongTermDebtDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtComponentsofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_7dcc3e23-8f22-4a82-820d-d7bed218b6db" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:to="loc_dei_LegalEntityAxis_7dcc3e23-8f22-4a82-820d-d7bed218b6db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7dcc3e23-8f22-4a82-820d-d7bed218b6db_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_7dcc3e23-8f22-4a82-820d-d7bed218b6db" xlink:to="loc_dei_EntityDomain_7dcc3e23-8f22-4a82-820d-d7bed218b6db_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3d20c219-0710-4a68-9e8a-55c0ebb57e56" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_7dcc3e23-8f22-4a82-820d-d7bed218b6db" xlink:to="loc_dei_EntityDomain_3d20c219-0710-4a68-9e8a-55c0ebb57e56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_7ef25ec8-0008-4af3-8064-bd9b049a5e4f" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3d20c219-0710-4a68-9e8a-55c0ebb57e56" xlink:to="loc_aal_AmericanAirlinesIncMember_7ef25ec8-0008-4af3-8064-bd9b049a5e4f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_cab99175-2593-46b4-a41a-f44728a2dfb8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_cab99175-2593-46b4-a41a-f44728a2dfb8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_cab99175-2593-46b4-a41a-f44728a2dfb8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_cab99175-2593-46b4-a41a-f44728a2dfb8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_cab99175-2593-46b4-a41a-f44728a2dfb8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_ba8e25ab-252f-44f6-aa03-1fca151df4fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_cab99175-2593-46b4-a41a-f44728a2dfb8" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_ba8e25ab-252f-44f6-aa03-1fca151df4fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_5202f69f-afca-4924-bd37-47045c9cb448" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ba8e25ab-252f-44f6-aa03-1fca151df4fd" xlink:to="loc_us-gaap_SecuredDebtMember_5202f69f-afca-4924-bd37-47045c9cb448" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_1fa9bd8c-f20d-43b9-b39e-b301d421d00f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_ba8e25ab-252f-44f6-aa03-1fca151df4fd" xlink:to="loc_us-gaap_UnsecuredDebtMember_1fa9bd8c-f20d-43b9-b39e-b301d421d00f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_fdf110a3-cf83-4082-acd4-25344b8ccdc2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:to="loc_us-gaap_DebtInstrumentAxis_fdf110a3-cf83-4082-acd4-25344b8ccdc2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_fdf110a3-cf83-4082-acd4-25344b8ccdc2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_fdf110a3-cf83-4082-acd4-25344b8ccdc2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_fdf110a3-cf83-4082-acd4-25344b8ccdc2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_fdf110a3-cf83-4082-acd4-25344b8ccdc2" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2013Member_15d79531-6461-4f18-a22a-684feb2768df" xlink:href="aal-20231231.xsd#aal_CreditFacility2013Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_CreditFacility2013Member_15d79531-6461-4f18-a22a-684feb2768df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2014Member_a7d06672-8e2d-4830-8c55-905c69272415" xlink:href="aal-20231231.xsd#aal_CreditFacility2014Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_CreditFacility2014Member_a7d06672-8e2d-4830-8c55-905c69272415" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2023Member_e86c0aaf-7392-44af-9f2c-17ff259287f8" xlink:href="aal-20231231.xsd#aal_CreditFacility2023Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_CreditFacility2023Member_e86c0aaf-7392-44af-9f2c-17ff259287f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNotes11.75Due2025Member_b63d3bb5-ca0d-4356-8413-40c32eda00af" xlink:href="aal-20231231.xsd#aal_SeniorNotes11.75Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_SeniorNotes11.75Due2025Member_b63d3bb5-ca0d-4356-8413-40c32eda00af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesIPNotesMember_3e1acffc-3690-4817-868d-cb6587a72aea" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesIPNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_A1075SeniorSecuredNotesIPNotesMember_3e1acffc-3690-4817-868d-cb6587a72aea" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesLGADCANotesMember_1c6cb961-c1af-4f3c-b4fc-b031ca1f9cba" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesLGADCANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_A1075SeniorSecuredNotesLGADCANotesMember_1c6cb961-c1af-4f3c-b4fc-b031ca1f9cba" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A725SeniorSecuredNotesDue2028Member_8cc92e29-b20d-4467-9688-c6af247d9916" xlink:href="aal-20231231.xsd#aal_A725SeniorSecuredNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_A725SeniorSecuredNotesDue2028Member_8cc92e29-b20d-4467-9688-c6af247d9916" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A850SeniorSecuredNotesDue2029Member_4fd68282-9d06-4a4b-99ca-0f8766425f57" xlink:href="aal-20231231.xsd#aal_A850SeniorSecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_A850SeniorSecuredNotesDue2029Member_4fd68282-9d06-4a4b-99ca-0f8766425f57" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote550Matures2026Member_92af2ed2-69f2-4d8e-9be1-61aba4b29510" xlink:href="aal-20231231.xsd#aal_SeniorNote550Matures2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_SeniorNote550Matures2026Member_92af2ed2-69f2-4d8e-9be1-61aba4b29510" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote575Matures2029Member_d9bc478d-3d6a-4666-a8f8-ce68a9bcbc48" xlink:href="aal-20231231.xsd#aal_SeniorNote575Matures2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_SeniorNote575Matures2029Member_d9bc478d-3d6a-4666-a8f8-ce68a9bcbc48" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AAdvantageTermLoanFacilityMember_8596a4aa-8c64-4837-a842-5d64ea2d58fd" xlink:href="aal-20231231.xsd#aal_AAdvantageTermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_AAdvantageTermLoanFacilityMember_8596a4aa-8c64-4837-a842-5d64ea2d58fd" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_1c5ef489-51d8-4c6e-8e1d-f138aa51a178" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_1c5ef489-51d8-4c6e-8e1d-f138aa51a178" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_EquipmentLoansAndOtherNotesPayableMember_ceecb034-6c64-4726-adfd-ea4aaaffc131" xlink:href="aal-20231231.xsd#aal_EquipmentLoansAndOtherNotesPayableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_EquipmentLoansAndOtherNotesPayableMember_ceecb034-6c64-4726-adfd-ea4aaaffc131" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_fc5b7842-1086-4049-a3cd-582faaa1666f" xlink:href="aal-20231231.xsd#aal_SpecialFacilityRevenueBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_fc5b7842-1086-4049-a3cd-582faaa1666f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_a7e16c90-a16c-4095-a69a-b1bd1abc699c" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteOneCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_a7e16c90-a16c-4095-a69a-b1bd1abc699c" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember_79bb6476-ce4d-48c0-8fde-2deb7e0f4509" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember_79bb6476-ce4d-48c0-8fde-2deb7e0f4509" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember_8690418f-fc5f-4780-a86a-c1c66d743ebd" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember_8690418f-fc5f-4780-a86a-c1c66d743ebd" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_17531f0d-1144-4afe-8181-c3ee60c1d09c" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_17531f0d-1144-4afe-8181-c3ee60c1d09c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote375Matures2025Member_b76da5d0-f4ee-46ee-b154-1d0728119f10" xlink:href="aal-20231231.xsd#aal_SeniorNote375Matures2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_584a5e3a-8ef0-4ae1-b4c4-a5b7dfe16458" xlink:to="loc_aal_SeniorNote375Matures2025Member_b76da5d0-f4ee-46ee-b154-1d0728119f10" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bb529a41-d089-43e8-86f1-111a08cc4ef2" xlink:to="loc_srt_RangeAxis_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd" xlink:to="loc_srt_RangeMember_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_dbd5d77f-8052-4551-8108-1521b959c763" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1e8dd6c2-ef4c-426f-8a1a-ffd5d3a80fbd" xlink:to="loc_srt_RangeMember_dbd5d77f-8052-4551-8108-1521b959c763" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_5b55a6dd-6d64-488d-9a39-e93a60b7bbeb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_dbd5d77f-8052-4551-8108-1521b959c763" xlink:to="loc_srt_MinimumMember_5b55a6dd-6d64-488d-9a39-e93a60b7bbeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_663055b7-343b-4b9a-aeb9-fb19168eeb01" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_dbd5d77f-8052-4551-8108-1521b959c763" xlink:to="loc_srt_MaximumMember_663055b7-343b-4b9a-aeb9-fb19168eeb01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_9d40921c-c62b-4851-89ce-f15da8110d4a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_9d40921c-c62b-4851-89ce-f15da8110d4a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_cc123aaf-a9ca-4c02-9bd4-205bd12e0059" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_cc123aaf-a9ca-4c02-9bd4-205bd12e0059" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtCurrent_ec0fd82d-b1f3-413a-906d-0ab6a1382ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_LongTermDebtCurrent_ec0fd82d-b1f3-413a-906d-0ab6a1382ad7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_3fc1423d-4fc5-4ccd-b095-4c7332088f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_LongTermDebt_3fc1423d-4fc5-4ccd-b095-4c7332088f8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_349b71d0-8c1e-4691-a6e8-b46ad4eefb41" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_349b71d0-8c1e-4691-a6e8-b46ad4eefb41" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6f19fa68-465f-45ab-9113-1cc7ca8a89c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6f19fa68-465f-45ab-9113-1cc7ca8a89c4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_ff3dc502-03a1-43e7-9fae-b7d3e7297ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_4b593c46-0737-4d54-82b9-229f8dd2cfbe" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_ff3dc502-03a1-43e7-9fae-b7d3e7297ed4" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtSummaryofAvailabilityunderRevolvingCreditFacilitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtSummaryofAvailabilityunderRevolvingCreditFacilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtSummaryofAvailabilityunderRevolvingCreditFacilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_9a1e885f-2e5f-4ce6-ac77-e1f288222a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_9a1e885f-2e5f-4ce6-ac77-e1f288222a9c" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_005354bf-752e-4598-af21-3d90f953c603" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:to="loc_dei_LegalEntityAxis_005354bf-752e-4598-af21-3d90f953c603" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_005354bf-752e-4598-af21-3d90f953c603_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_005354bf-752e-4598-af21-3d90f953c603" xlink:to="loc_dei_EntityDomain_005354bf-752e-4598-af21-3d90f953c603_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9887c651-e888-45af-b87d-924b6be96193" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_005354bf-752e-4598-af21-3d90f953c603" xlink:to="loc_dei_EntityDomain_9887c651-e888-45af-b87d-924b6be96193" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_21f5117e-5a59-4d60-a9d8-e111a411522e" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9887c651-e888-45af-b87d-924b6be96193" xlink:to="loc_aal_AmericanAirlinesIncMember_21f5117e-5a59-4d60-a9d8-e111a411522e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_3ddec53d-10de-4408-b3f1-14a029dc0e02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:to="loc_us-gaap_CreditFacilityAxis_3ddec53d-10de-4408-b3f1-14a029dc0e02" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3ddec53d-10de-4408-b3f1-14a029dc0e02_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_3ddec53d-10de-4408-b3f1-14a029dc0e02" xlink:to="loc_us-gaap_CreditFacilityDomain_3ddec53d-10de-4408-b3f1-14a029dc0e02_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_9e4f5fec-b9d9-4698-9096-166d5dc13a92" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_3ddec53d-10de-4408-b3f1-14a029dc0e02" xlink:to="loc_us-gaap_CreditFacilityDomain_9e4f5fec-b9d9-4698-9096-166d5dc13a92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_afe3fa67-d081-4eec-9a1f-69d43f715076" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_9e4f5fec-b9d9-4698-9096-166d5dc13a92" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_afe3fa67-d081-4eec-9a1f-69d43f715076" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_27dece22-e2d8-46e3-a863-a347664a95cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:to="loc_us-gaap_DebtInstrumentAxis_27dece22-e2d8-46e3-a863-a347664a95cc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_27dece22-e2d8-46e3-a863-a347664a95cc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_27dece22-e2d8-46e3-a863-a347664a95cc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_27dece22-e2d8-46e3-a863-a347664a95cc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_27dece22-e2d8-46e3-a863-a347664a95cc" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2013Member_08e00371-6d29-4533-b51b-9002541df2bd" xlink:href="aal-20231231.xsd#aal_CreditFacility2013Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:to="loc_aal_CreditFacility2013Member_08e00371-6d29-4533-b51b-9002541df2bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2014Member_18f6ace6-8311-4089-b445-87cc30a9f6da" xlink:href="aal-20231231.xsd#aal_CreditFacility2014Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:to="loc_aal_CreditFacility2014Member_18f6ace6-8311-4089-b445-87cc30a9f6da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacilityApril2016Member_ad59d535-be93-4764-a252-f94b22b06eb0" xlink:href="aal-20231231.xsd#aal_CreditFacilityApril2016Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:to="loc_aal_CreditFacilityApril2016Member_ad59d535-be93-4764-a252-f94b22b06eb0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ShortTermRevolvingAndOtherFacilitiesMember_c98a9882-ffee-4270-9578-1b78c3ba6f53" xlink:href="aal-20231231.xsd#aal_ShortTermRevolvingAndOtherFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:to="loc_aal_ShortTermRevolvingAndOtherFacilitiesMember_c98a9882-ffee-4270-9578-1b78c3ba6f53" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CargoReceivableFacilityMember_5376497c-fcf5-4ddf-a45b-9f38641c3815" xlink:href="aal-20231231.xsd#aal_CargoReceivableFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_958ae7a2-b462-405e-a68c-edd275361473" xlink:to="loc_aal_CargoReceivableFacilityMember_5376497c-fcf5-4ddf-a45b-9f38641c3815" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_3549be79-eec3-4218-abe5-cfd3234d3d97" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_5cde8872-63f2-4cde-8ef0-0e776ed4e6f2" xlink:to="loc_srt_StatementScenarioAxis_3549be79-eec3-4218-abe5-cfd3234d3d97" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_3549be79-eec3-4218-abe5-cfd3234d3d97_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_3549be79-eec3-4218-abe5-cfd3234d3d97" xlink:to="loc_srt_ScenarioUnspecifiedDomain_3549be79-eec3-4218-abe5-cfd3234d3d97_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_5242827d-606d-41ec-b21c-3b2e0aa7c76b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_3549be79-eec3-4218-abe5-cfd3234d3d97" xlink:to="loc_srt_ScenarioUnspecifiedDomain_5242827d-606d-41ec-b21c-3b2e0aa7c76b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_ff8bcb5a-dbf6-4915-8c27-e3d9a2d76c38" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_5242827d-606d-41ec-b21c-3b2e0aa7c76b" xlink:to="loc_srt_ScenarioForecastMember_ff8bcb5a-dbf6-4915-8c27-e3d9a2d76c38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_25c0cd5b-b682-4379-a014-9a3481340f03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_9a1e885f-2e5f-4ce6-ac77-e1f288222a9c" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_25c0cd5b-b682-4379-a014-9a3481340f03" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_37500810-fa24-4ea6-9806-64b5bea946af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_9a1e885f-2e5f-4ce6-ac77-e1f288222a9c" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_37500810-fa24-4ea6-9806-64b5bea946af" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtScheduleofMaturitiesofLongTermDebtDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtScheduleofMaturitiesofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtScheduleofMaturitiesofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_084fcaf9-786f-4308-94fd-03c6b5cd0fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_cbaba9b1-ddbf-4ffc-9acb-ad306fc57019" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_084fcaf9-786f-4308-94fd-03c6b5cd0fc5" xlink:to="loc_us-gaap_DebtInstrumentTable_cbaba9b1-ddbf-4ffc-9acb-ad306fc57019" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cbaba9b1-ddbf-4ffc-9acb-ad306fc57019" xlink:to="loc_dei_LegalEntityAxis_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e" xlink:to="loc_dei_EntityDomain_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1d2eb3a9-fba1-402c-b38c-4d4bd710f692" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6a73ccfb-3aa9-43e3-b9ae-7570058ea51e" xlink:to="loc_dei_EntityDomain_1d2eb3a9-fba1-402c-b38c-4d4bd710f692" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_56031605-4013-4198-8378-f439698ffa8b" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1d2eb3a9-fba1-402c-b38c-4d4bd710f692" xlink:to="loc_aal_AmericanAirlinesIncMember_56031605-4013-4198-8378-f439698ffa8b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MaturitiesOfLongTermDebtAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_084fcaf9-786f-4308-94fd-03c6b5cd0fc5" xlink:to="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_fba75633-bb87-4390-b7a6-72a4a42582bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths_fba75633-bb87-4390-b7a6-72a4a42582bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_34ad4217-10aa-43ea-9667-3034d0d13cbb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo_34ad4217-10aa-43ea-9667-3034d0d13cbb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_a5eafcbb-49ef-4a53-b464-0d599c420068" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree_a5eafcbb-49ef-4a53-b464-0d599c420068" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_c88547fd-6808-4165-8303-2fbfe2536189" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour_c88547fd-6808-4165-8303-2fbfe2536189" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_6bb22b3d-15c0-4818-a633-970fc75e880c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive_6bb22b3d-15c0-4818-a633-970fc75e880c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_5dd57cca-8508-41f6-899a-0335780cdf21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive_5dd57cca-8508-41f6-899a-0335780cdf21" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_fc0777d0-7573-4591-b154-1d2c3cb5cf84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaturitiesOfLongTermDebtAbstract_4c1c0cff-cece-4148-8056-73cd4b10c9f8" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_fc0777d0-7573-4591-b154-1d2c3cb5cf84" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt2013and2014CreditFacilitiesApril2016RevolvingFacilityand2023TermLoanFacilityDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt2013and2014CreditFacilitiesApril2016RevolvingFacilityand2023TermLoanFacilityDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt2013and2014CreditFacilitiesApril2016RevolvingFacilityand2023TermLoanFacilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_84dcd80a-892d-49df-b312-cf6bb8a3b57b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_dei_LegalEntityAxis_84dcd80a-892d-49df-b312-cf6bb8a3b57b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_84dcd80a-892d-49df-b312-cf6bb8a3b57b_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_84dcd80a-892d-49df-b312-cf6bb8a3b57b" xlink:to="loc_dei_EntityDomain_84dcd80a-892d-49df-b312-cf6bb8a3b57b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9589acd8-a72e-441c-815e-dae7e4ff6b20" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_84dcd80a-892d-49df-b312-cf6bb8a3b57b" xlink:to="loc_dei_EntityDomain_9589acd8-a72e-441c-815e-dae7e4ff6b20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_5bc9b330-4feb-48a5-bda3-489bf76efbd5" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9589acd8-a72e-441c-815e-dae7e4ff6b20" xlink:to="loc_aal_AmericanAirlinesIncMember_5bc9b330-4feb-48a5-bda3-489bf76efbd5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_c743c980-0799-400c-9053-aa757ba4c41f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_us-gaap_CreditFacilityAxis_c743c980-0799-400c-9053-aa757ba4c41f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_c743c980-0799-400c-9053-aa757ba4c41f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_c743c980-0799-400c-9053-aa757ba4c41f" xlink:to="loc_us-gaap_CreditFacilityDomain_c743c980-0799-400c-9053-aa757ba4c41f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d57eb3a1-759c-4789-a42b-a6b01590f397" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_c743c980-0799-400c-9053-aa757ba4c41f" xlink:to="loc_us-gaap_CreditFacilityDomain_d57eb3a1-759c-4789-a42b-a6b01590f397" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_TermLoanMember_19211d6f-3eda-4c61-b2ba-cb89894d88ee" xlink:href="aal-20231231.xsd#aal_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d57eb3a1-759c-4789-a42b-a6b01590f397" xlink:to="loc_aal_TermLoanMember_19211d6f-3eda-4c61-b2ba-cb89894d88ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_cdb387fe-88bd-42a4-be74-f1145c9191c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d57eb3a1-759c-4789-a42b-a6b01590f397" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_cdb387fe-88bd-42a4-be74-f1145c9191c5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LetterOfCreditMember_09254d81-8567-478b-96c5-f6722afe8ade" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LetterOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d57eb3a1-759c-4789-a42b-a6b01590f397" xlink:to="loc_us-gaap_LetterOfCreditMember_09254d81-8567-478b-96c5-f6722afe8ade" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_us-gaap_DebtInstrumentAxis_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_e08ea774-4e53-4ce7-9bbe-98f27b8e78ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2013Member_d5e6dd60-a5d9-4e7b-9615-ad7a3ef4d853" xlink:href="aal-20231231.xsd#aal_CreditFacility2013Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_CreditFacility2013Member_d5e6dd60-a5d9-4e7b-9615-ad7a3ef4d853" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2014Member_b64b3b58-c864-48ea-8170-639f2e45edec" xlink:href="aal-20231231.xsd#aal_CreditFacility2014Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_CreditFacility2014Member_b64b3b58-c864-48ea-8170-639f2e45edec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacilityApril2016Member_e39c8975-726b-4208-802f-4c427f024aa3" xlink:href="aal-20231231.xsd#aal_CreditFacilityApril2016Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_CreditFacilityApril2016Member_e39c8975-726b-4208-802f-4c427f024aa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A2023TermLoanFacilityMember_771dc07d-ae1d-41ef-93f6-d70b62a044a5" xlink:href="aal-20231231.xsd#aal_A2023TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_A2023TermLoanFacilityMember_771dc07d-ae1d-41ef-93f6-d70b62a044a5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A725SeniorSecuredNotesDue2028Member_fdd039d4-4b46-4704-9ac6-57352bb77f5b" xlink:href="aal-20231231.xsd#aal_A725SeniorSecuredNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_A725SeniorSecuredNotesDue2028Member_fdd039d4-4b46-4704-9ac6-57352bb77f5b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2013TermLoanMember_481ad131-53cc-4353-b30e-83f788fa144d" xlink:href="aal-20231231.xsd#aal_CreditFacility2013TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_CreditFacility2013TermLoanMember_481ad131-53cc-4353-b30e-83f788fa144d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacilitiesMember_ebbdea8f-b610-4c28-bd41-94409269167b" xlink:href="aal-20231231.xsd#aal_CreditFacilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_b738e50f-868e-468c-b4c7-28ec03da0728" xlink:to="loc_aal_CreditFacilitiesMember_ebbdea8f-b610-4c28-bd41-94409269167b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_103bb5f0-fd76-4b54-8836-e5425cad049b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_103bb5f0-fd76-4b54-8836-e5425cad049b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_103bb5f0-fd76-4b54-8836-e5425cad049b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_103bb5f0-fd76-4b54-8836-e5425cad049b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_103bb5f0-fd76-4b54-8836-e5425cad049b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_02d08c04-53ce-42c0-95ab-e0a97ca41a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_103bb5f0-fd76-4b54-8836-e5425cad049b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_02d08c04-53ce-42c0-95ab-e0a97ca41a4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_ed228015-56e1-44b9-b3a0-890e7f2586f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_02d08c04-53ce-42c0-95ab-e0a97ca41a4e" xlink:to="loc_us-gaap_SecuredDebtMember_ed228015-56e1-44b9-b3a0-890e7f2586f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_TermLoanMember_cd72799d-3dd7-4e38-900a-68bac7b268bb" xlink:href="aal-20231231.xsd#aal_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_02d08c04-53ce-42c0-95ab-e0a97ca41a4e" xlink:to="loc_aal_TermLoanMember_cd72799d-3dd7-4e38-900a-68bac7b268bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_253a41a1-404f-4c74-969f-5791ec6f95c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_02d08c04-53ce-42c0-95ab-e0a97ca41a4e" xlink:to="loc_us-gaap_SeniorNotesMember_253a41a1-404f-4c74-969f-5791ec6f95c9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_46356911-5cde-44f1-abb4-7ed63f05f543" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_us-gaap_VariableRateAxis_46356911-5cde-44f1-abb4-7ed63f05f543" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_46356911-5cde-44f1-abb4-7ed63f05f543_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_46356911-5cde-44f1-abb4-7ed63f05f543" xlink:to="loc_us-gaap_VariableRateDomain_46356911-5cde-44f1-abb4-7ed63f05f543_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_3b4bc5f7-8a11-47e5-b16b-03e09060a567" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_46356911-5cde-44f1-abb4-7ed63f05f543" xlink:to="loc_us-gaap_VariableRateDomain_3b4bc5f7-8a11-47e5-b16b-03e09060a567" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_9cb96777-4c15-47b5-aa47-e9e4ac5be2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3b4bc5f7-8a11-47e5-b16b-03e09060a567" xlink:to="loc_us-gaap_BaseRateMember_9cb96777-4c15-47b5-aa47-e9e4ac5be2a9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_2a2186fe-6040-445c-b583-82fe2e3aac28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_3b4bc5f7-8a11-47e5-b16b-03e09060a567" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_2a2186fe-6040-445c-b583-82fe2e3aac28" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_e1fbfa88-81fa-4d9f-bc79-84182d903d61" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_srt_StatementScenarioAxis_e1fbfa88-81fa-4d9f-bc79-84182d903d61" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_e1fbfa88-81fa-4d9f-bc79-84182d903d61_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_e1fbfa88-81fa-4d9f-bc79-84182d903d61" xlink:to="loc_srt_ScenarioUnspecifiedDomain_e1fbfa88-81fa-4d9f-bc79-84182d903d61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_492cb4e3-e27f-40a9-9153-974f47049011" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_e1fbfa88-81fa-4d9f-bc79-84182d903d61" xlink:to="loc_srt_ScenarioUnspecifiedDomain_492cb4e3-e27f-40a9-9153-974f47049011" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_b6ac9398-825f-400a-a8bb-667e08f4e3bb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_492cb4e3-e27f-40a9-9153-974f47049011" xlink:to="loc_srt_ScenarioForecastMember_b6ac9398-825f-400a-a8bb-667e08f4e3bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioAxis_dd1a867b-928a-4d1a-84f8-2d85cc215e74" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f8dce382-f123-44fc-8faa-b590825e9b99" xlink:to="loc_aal_InterestRateScenarioAxis_dd1a867b-928a-4d1a-84f8-2d85cc215e74" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioDomain_dd1a867b-928a-4d1a-84f8-2d85cc215e74_default" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_aal_InterestRateScenarioAxis_dd1a867b-928a-4d1a-84f8-2d85cc215e74" xlink:to="loc_aal_InterestRateScenarioDomain_dd1a867b-928a-4d1a-84f8-2d85cc215e74_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioDomain_df3d6903-63a3-4eed-a20a-51e2d7411a8d" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_aal_InterestRateScenarioAxis_dd1a867b-928a-4d1a-84f8-2d85cc215e74" xlink:to="loc_aal_InterestRateScenarioDomain_df3d6903-63a3-4eed-a20a-51e2d7411a8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateMarginOneMember_a2e0f7de-4a28-4f50-a717-05e76e563ade" xlink:href="aal-20231231.xsd#aal_InterestRateMarginOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_InterestRateScenarioDomain_df3d6903-63a3-4eed-a20a-51e2d7411a8d" xlink:to="loc_aal_InterestRateMarginOneMember_a2e0f7de-4a28-4f50-a717-05e76e563ade" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateMarginTwoMember_9547156e-98c3-4bd3-93c0-9c00a8a4deb8" xlink:href="aal-20231231.xsd#aal_InterestRateMarginTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_InterestRateScenarioDomain_df3d6903-63a3-4eed-a20a-51e2d7411a8d" xlink:to="loc_aal_InterestRateMarginTwoMember_9547156e-98c3-4bd3-93c0-9c00a8a4deb8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateMarginThreeMember_000a7d74-dc5d-40cd-8803-c5ade3b0837c" xlink:href="aal-20231231.xsd#aal_InterestRateMarginThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_InterestRateScenarioDomain_df3d6903-63a3-4eed-a20a-51e2d7411a8d" xlink:to="loc_aal_InterestRateMarginThreeMember_000a7d74-dc5d-40cd-8803-c5ade3b0837c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentRefinancedAmount_55770db3-0ded-4120-926e-af2af4e79a25" xlink:href="aal-20231231.xsd#aal_DebtInstrumentRefinancedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_aal_DebtInstrumentRefinancedAmount_55770db3-0ded-4120-926e-af2af4e79a25" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d10175d7-dc8c-41b8-aa58-5518e08ee123" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_d10175d7-dc8c-41b8-aa58-5518e08ee123" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_079a7cb6-4e78-4ec4-bf0e-3ae237201122" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_079a7cb6-4e78-4ec4-bf0e-3ae237201122" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_85398f59-ca15-4bad-a24e-018a00e1ae33" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_85398f59-ca15-4bad-a24e-018a00e1ae33" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCredit_250684fd-a965-45f7-84bb-8b78f48c0985" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_LineOfCredit_250684fd-a965-45f7-84bb-8b78f48c0985" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin_3e3262eb-be07-4cae-b941-6c39734891a4" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin_3e3262eb-be07-4cae-b941-6c39734891a4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_8098a20d-27df-4201-8849-0659645c5207" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_LongTermDebt_8098a20d-27df-4201-8849-0659645c5207" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5b013544-7c01-48e4-9de5-638332c30984" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_5b013544-7c01-48e4-9de5-638332c30984" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance_15bea9cc-0cce-4d7f-8225-b1334e12f62e" xlink:href="aal-20231231.xsd#aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance_15bea9cc-0cce-4d7f-8225-b1334e12f62e" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_a6fc35e1-3924-4df0-b936-b7edfeba2169" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_a6fc35e1-3924-4df0-b936-b7edfeba2169" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_783c26b0-dff3-47cd-b584-37cb50a7f706" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_b16ff585-1d53-492a-a935-8e5d5369c4f1" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_783c26b0-dff3-47cd-b584-37cb50a7f706" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt1175SecuredSeniorNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt1175SecuredSeniorNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt1175SecuredSeniorNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_48b9a2cf-3cdd-42de-993a-f68799852b07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_us-gaap_DebtInstrumentTable_48b9a2cf-3cdd-42de-993a-f68799852b07" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_087f6cfa-756d-401d-b30a-0c9c0f2603d1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_48b9a2cf-3cdd-42de-993a-f68799852b07" xlink:to="loc_dei_LegalEntityAxis_087f6cfa-756d-401d-b30a-0c9c0f2603d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_087f6cfa-756d-401d-b30a-0c9c0f2603d1_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_087f6cfa-756d-401d-b30a-0c9c0f2603d1" xlink:to="loc_dei_EntityDomain_087f6cfa-756d-401d-b30a-0c9c0f2603d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a81edc81-d67d-441f-b92f-e0312b6b85cc" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_087f6cfa-756d-401d-b30a-0c9c0f2603d1" xlink:to="loc_dei_EntityDomain_a81edc81-d67d-441f-b92f-e0312b6b85cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_8e95fb14-1c6d-49c9-b733-da4ddc3472da" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a81edc81-d67d-441f-b92f-e0312b6b85cc" xlink:to="loc_aal_AmericanAirlinesIncMember_8e95fb14-1c6d-49c9-b733-da4ddc3472da" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_e4575a32-3adc-4f21-947e-58ca10e16f0d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_48b9a2cf-3cdd-42de-993a-f68799852b07" xlink:to="loc_us-gaap_DebtInstrumentAxis_e4575a32-3adc-4f21-947e-58ca10e16f0d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e4575a32-3adc-4f21-947e-58ca10e16f0d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_e4575a32-3adc-4f21-947e-58ca10e16f0d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e4575a32-3adc-4f21-947e-58ca10e16f0d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8923db34-eaad-487c-a009-9decc4fcf346" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_e4575a32-3adc-4f21-947e-58ca10e16f0d" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8923db34-eaad-487c-a009-9decc4fcf346" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNotes11.75Due2025Member_90465676-aedf-4cf5-8505-936aae751a64" xlink:href="aal-20231231.xsd#aal_SeniorNotes11.75Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8923db34-eaad-487c-a009-9decc4fcf346" xlink:to="loc_aal_SeniorNotes11.75Due2025Member_90465676-aedf-4cf5-8505-936aae751a64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_947222a0-334b-4695-a549-7c3574575833" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_48b9a2cf-3cdd-42de-993a-f68799852b07" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_947222a0-334b-4695-a549-7c3574575833" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_947222a0-334b-4695-a549-7c3574575833_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_947222a0-334b-4695-a549-7c3574575833" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_947222a0-334b-4695-a549-7c3574575833_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_069f017f-fa06-42f3-bf8d-f758ffb76e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_947222a0-334b-4695-a549-7c3574575833" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_069f017f-fa06-42f3-bf8d-f758ffb76e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_d9b3aced-0b6c-4789-9b84-97f4f2de0b4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_069f017f-fa06-42f3-bf8d-f758ffb76e4e" xlink:to="loc_us-gaap_SeniorNotesMember_d9b3aced-0b6c-4789-9b84-97f4f2de0b4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1e00b033-0bb1-4a10-a7a3-9efa6707e770" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1e00b033-0bb1-4a10-a7a3-9efa6707e770" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_3c7dde02-edbb-44af-99a2-92909945cb65" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_3c7dde02-edbb-44af-99a2-92909945cb65" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LongTermDebtPricePercentageOfParValue_2dbe6bdf-8132-42c3-b6ea-e74516a33ee2" xlink:href="aal-20231231.xsd#aal_LongTermDebtPricePercentageOfParValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_aal_LongTermDebtPricePercentageOfParValue_2dbe6bdf-8132-42c3-b6ea-e74516a33ee2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PaymentOfMakeWholePremium_4f5ff37d-2158-45c7-b7a7-6977daf3f2a9" xlink:href="aal-20231231.xsd#aal_PaymentOfMakeWholePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_aal_PaymentOfMakeWholePremium_4f5ff37d-2158-45c7-b7a7-6977daf3f2a9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff_56b059cd-deb5-42da-a9f0-a20164a44f11" xlink:href="aal-20231231.xsd#aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3e8d9a55-1e3f-40b7-b7a6-dd99602113cb" xlink:to="loc_aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff_56b059cd-deb5-42da-a9f0-a20164a44f11" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt1075SeniorSecuredNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt1075SeniorSecuredNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt1075SeniorSecuredNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_a8fcece1-98d0-4b30-977d-b1be00259164" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a8fcece1-98d0-4b30-977d-b1be00259164" xlink:to="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_8fbbbb69-d902-4ce3-8102-96132cbaf994" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:to="loc_dei_LegalEntityAxis_8fbbbb69-d902-4ce3-8102-96132cbaf994" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8fbbbb69-d902-4ce3-8102-96132cbaf994_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8fbbbb69-d902-4ce3-8102-96132cbaf994" xlink:to="loc_dei_EntityDomain_8fbbbb69-d902-4ce3-8102-96132cbaf994_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a1a05617-11ff-45a3-ae6c-a04b59b33f75" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8fbbbb69-d902-4ce3-8102-96132cbaf994" xlink:to="loc_dei_EntityDomain_a1a05617-11ff-45a3-ae6c-a04b59b33f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_597a6350-9765-412e-ab54-62ae7079ac0b" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a1a05617-11ff-45a3-ae6c-a04b59b33f75" xlink:to="loc_aal_AmericanAirlinesIncMember_597a6350-9765-412e-ab54-62ae7079ac0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:to="loc_us-gaap_DebtInstrumentAxis_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6d87937d-a13b-49fe-870e-46b25cf23429" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_9f6e8d7d-b8b6-4fa1-b944-e49eefbfdf41" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6d87937d-a13b-49fe-870e-46b25cf23429" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesMember_92acb7a7-afd3-4923-b1cf-2a307d3c647b" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d87937d-a13b-49fe-870e-46b25cf23429" xlink:to="loc_aal_A1075SeniorSecuredNotesMember_92acb7a7-afd3-4923-b1cf-2a307d3c647b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesIPNotesMember_c8a85506-524e-42f4-944c-d39226853441" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesIPNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d87937d-a13b-49fe-870e-46b25cf23429" xlink:to="loc_aal_A1075SeniorSecuredNotesIPNotesMember_c8a85506-524e-42f4-944c-d39226853441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesLGADCANotesMember_338eb1f6-65fe-46a1-9b91-a8bc591d8dc2" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesLGADCANotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d87937d-a13b-49fe-870e-46b25cf23429" xlink:to="loc_aal_A1075SeniorSecuredNotesLGADCANotesMember_338eb1f6-65fe-46a1-9b91-a8bc591d8dc2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_889d090a-ad0c-43b1-9a9d-49eb27e3d08b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_889d090a-ad0c-43b1-9a9d-49eb27e3d08b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_889d090a-ad0c-43b1-9a9d-49eb27e3d08b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_889d090a-ad0c-43b1-9a9d-49eb27e3d08b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_889d090a-ad0c-43b1-9a9d-49eb27e3d08b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2d957743-fb54-4b2c-aa59-8a4377dbb3a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_889d090a-ad0c-43b1-9a9d-49eb27e3d08b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2d957743-fb54-4b2c-aa59-8a4377dbb3a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_445a90fd-aa63-464d-9b44-6ee320e5203f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2d957743-fb54-4b2c-aa59-8a4377dbb3a2" xlink:to="loc_us-gaap_SeniorNotesMember_445a90fd-aa63-464d-9b44-6ee320e5203f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentInKindPIKNoteMember_c9f2fecb-0aab-4baf-b7db-3190de5c51f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentInKindPIKNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2d957743-fb54-4b2c-aa59-8a4377dbb3a2" xlink:to="loc_us-gaap_PaymentInKindPIKNoteMember_c9f2fecb-0aab-4baf-b7db-3190de5c51f7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_0e2adf89-80fa-4792-9bb0-89dff715980a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bba83ef6-f57b-4986-9f4e-d8c7ecc690e8" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_0e2adf89-80fa-4792-9bb0-89dff715980a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_0e2adf89-80fa-4792-9bb0-89dff715980a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_0e2adf89-80fa-4792-9bb0-89dff715980a" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_0e2adf89-80fa-4792-9bb0-89dff715980a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_b8e16dcf-6555-4358-ad58-55d40d3a82f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_0e2adf89-80fa-4792-9bb0-89dff715980a" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_b8e16dcf-6555-4358-ad58-55d40d3a82f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_917436ba-591e-4808-9f37-393296958f56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_b8e16dcf-6555-4358-ad58-55d40d3a82f6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_917436ba-591e-4808-9f37-393296958f56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_cd452212-c696-4ee2-a387-7bcea197962d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_b8e16dcf-6555-4358-ad58-55d40d3a82f6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_cd452212-c696-4ee2-a387-7bcea197962d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1a2c1c67-628d-45b7-9ce5-f4644b87d1ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a8fcece1-98d0-4b30-977d-b1be00259164" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1a2c1c67-628d-45b7-9ce5-f4644b87d1ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_ca2aa55d-fee8-4679-a971-b7af447b1a03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a8fcece1-98d0-4b30-977d-b1be00259164" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_ca2aa55d-fee8-4679-a971-b7af447b1a03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_5faf9183-8cd5-41e1-8e0e-df6090e3678f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_a8fcece1-98d0-4b30-977d-b1be00259164" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_5faf9183-8cd5-41e1-8e0e-df6090e3678f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt725SeniorSecuredNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt725SeniorSecuredNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt725SeniorSecuredNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_5acfb305-6589-442f-92d6-22db1afe0421" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:to="loc_us-gaap_DebtInstrumentAxis_5acfb305-6589-442f-92d6-22db1afe0421" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_5acfb305-6589-442f-92d6-22db1afe0421_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_5acfb305-6589-442f-92d6-22db1afe0421" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_5acfb305-6589-442f-92d6-22db1afe0421_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_316bc091-340a-450f-ad72-910712579c56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_5acfb305-6589-442f-92d6-22db1afe0421" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_316bc091-340a-450f-ad72-910712579c56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A725SeniorSecuredNotesDue2028Member_4ac7b2c6-69c2-40e5-8484-e4009bda5ee9" xlink:href="aal-20231231.xsd#aal_A725SeniorSecuredNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_316bc091-340a-450f-ad72-910712579c56" xlink:to="loc_aal_A725SeniorSecuredNotesDue2028Member_4ac7b2c6-69c2-40e5-8484-e4009bda5ee9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_5cf99919-8254-42fb-9922-29e69239f8e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_5cf99919-8254-42fb-9922-29e69239f8e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5cf99919-8254-42fb-9922-29e69239f8e0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5cf99919-8254-42fb-9922-29e69239f8e0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5cf99919-8254-42fb-9922-29e69239f8e0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_87c3a25d-e57d-447c-816c-65a60d407397" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5cf99919-8254-42fb-9922-29e69239f8e0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_87c3a25d-e57d-447c-816c-65a60d407397" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ce6b9aa3-541c-4882-ade1-f68881f39c05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_87c3a25d-e57d-447c-816c-65a60d407397" xlink:to="loc_us-gaap_SeniorNotesMember_ce6b9aa3-541c-4882-ade1-f68881f39c05" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b45914f7-2ebd-4a42-b3b7-636311e0c671" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:to="loc_dei_LegalEntityAxis_b45914f7-2ebd-4a42-b3b7-636311e0c671" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b45914f7-2ebd-4a42-b3b7-636311e0c671_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b45914f7-2ebd-4a42-b3b7-636311e0c671" xlink:to="loc_dei_EntityDomain_b45914f7-2ebd-4a42-b3b7-636311e0c671_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_25497011-df83-4dd3-9258-5d1e8a7e07bf" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b45914f7-2ebd-4a42-b3b7-636311e0c671" xlink:to="loc_dei_EntityDomain_25497011-df83-4dd3-9258-5d1e8a7e07bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_9d99d2aa-7a3b-4f74-a3a9-78aaea7f7a44" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_25497011-df83-4dd3-9258-5d1e8a7e07bf" xlink:to="loc_aal_AmericanAirlinesIncMember_9d99d2aa-7a3b-4f74-a3a9-78aaea7f7a44" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_5a9434a6-b35a-4756-b2be-4b360afe458f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_582416b7-4174-4bfd-96ac-52c8a34911bb" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_5a9434a6-b35a-4756-b2be-4b360afe458f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_5a9434a6-b35a-4756-b2be-4b360afe458f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_5a9434a6-b35a-4756-b2be-4b360afe458f" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_5a9434a6-b35a-4756-b2be-4b360afe458f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_06230d48-ee88-46a4-94c3-a3b1a601d96c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_5a9434a6-b35a-4756-b2be-4b360afe458f" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_06230d48-ee88-46a4-94c3-a3b1a601d96c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_ea8a50ab-20b9-433c-8733-efbe2b95998f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_06230d48-ee88-46a4-94c3-a3b1a601d96c" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_ea8a50ab-20b9-433c-8733-efbe2b95998f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7b27a2de-1d77-4bfe-ac1a-3be29c753fbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_06230d48-ee88-46a4-94c3-a3b1a601d96c" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_7b27a2de-1d77-4bfe-ac1a-3be29c753fbe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_51f7881b-d6c9-479f-a2e3-85a80db1bb27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_06230d48-ee88-46a4-94c3-a3b1a601d96c" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_51f7881b-d6c9-479f-a2e3-85a80db1bb27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_005b44f2-010f-4205-970a-3bbc6e79d4e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_005b44f2-010f-4205-970a-3bbc6e79d4e4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_67e92d36-2eca-493a-b14e-3f820ef0c6b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_67e92d36-2eca-493a-b14e-3f820ef0c6b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_d9104ef0-541f-4a5d-8d6e-9184e8716b02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_d9104ef0-541f-4a5d-8d6e-9184e8716b02" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_b4812b1f-f82d-4dc0-808c-b34915705e0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_b4812b1f-f82d-4dc0-808c-b34915705e0a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio_32a7b63c-0f6f-4cf9-a335-45b33be20a92" xlink:href="aal-20231231.xsd#aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio_32a7b63c-0f6f-4cf9-a335-45b33be20a92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentSpecialInterestRate_06c24700-0690-4b8d-8018-ff7d46a49cfc" xlink:href="aal-20231231.xsd#aal_DebtInstrumentSpecialInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_e50b610f-8d79-4ed2-894e-76d684d7363a" xlink:to="loc_aal_DebtInstrumentSpecialInterestRate_06c24700-0690-4b8d-8018-ff7d46a49cfc" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt850SeniorSecuredNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt850SeniorSecuredNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt850SeniorSecuredNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_1a9442e6-d48c-486a-8036-5af0b0f211ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:to="loc_us-gaap_DebtInstrumentAxis_1a9442e6-d48c-486a-8036-5af0b0f211ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_1a9442e6-d48c-486a-8036-5af0b0f211ad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_1a9442e6-d48c-486a-8036-5af0b0f211ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_1a9442e6-d48c-486a-8036-5af0b0f211ad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_e6b95b3f-c22c-4b27-bc53-0aa097879671" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_1a9442e6-d48c-486a-8036-5af0b0f211ad" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_e6b95b3f-c22c-4b27-bc53-0aa097879671" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A850SeniorSecuredNotesDue2029Member_f637b6bf-02e5-4155-8a7b-0b0ed6df5fac" xlink:href="aal-20231231.xsd#aal_A850SeniorSecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_e6b95b3f-c22c-4b27-bc53-0aa097879671" xlink:to="loc_aal_A850SeniorSecuredNotesDue2029Member_f637b6bf-02e5-4155-8a7b-0b0ed6df5fac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_321e478b-7597-486e-bdb8-f791fb99f04f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_321e478b-7597-486e-bdb8-f791fb99f04f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_321e478b-7597-486e-bdb8-f791fb99f04f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_321e478b-7597-486e-bdb8-f791fb99f04f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_321e478b-7597-486e-bdb8-f791fb99f04f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c1f4c7bc-3461-4eea-8a96-4427627d9688" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_321e478b-7597-486e-bdb8-f791fb99f04f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c1f4c7bc-3461-4eea-8a96-4427627d9688" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ad79c690-00b2-467d-a7f2-3ea272cbb83a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_c1f4c7bc-3461-4eea-8a96-4427627d9688" xlink:to="loc_us-gaap_SeniorNotesMember_ad79c690-00b2-467d-a7f2-3ea272cbb83a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5178893a-ca84-4940-b7a7-7f9aa85c917a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:to="loc_dei_LegalEntityAxis_5178893a-ca84-4940-b7a7-7f9aa85c917a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5178893a-ca84-4940-b7a7-7f9aa85c917a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5178893a-ca84-4940-b7a7-7f9aa85c917a" xlink:to="loc_dei_EntityDomain_5178893a-ca84-4940-b7a7-7f9aa85c917a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3829957a-81ef-40a9-9b4a-f2212a929f56" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5178893a-ca84-4940-b7a7-7f9aa85c917a" xlink:to="loc_dei_EntityDomain_3829957a-81ef-40a9-9b4a-f2212a929f56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_d1ed5a0c-284a-4888-ba9e-51816af45b66" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3829957a-81ef-40a9-9b4a-f2212a929f56" xlink:to="loc_aal_AmericanAirlinesIncMember_d1ed5a0c-284a-4888-ba9e-51816af45b66" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_f3b7030e-5439-404f-8c3d-2a74b0bb14d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_6f238b26-7d66-425a-b588-93a565dca26e" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_f3b7030e-5439-404f-8c3d-2a74b0bb14d5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f3b7030e-5439-404f-8c3d-2a74b0bb14d5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_f3b7030e-5439-404f-8c3d-2a74b0bb14d5" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f3b7030e-5439-404f-8c3d-2a74b0bb14d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f13ed9c4-9fc1-4303-9c28-eca4d27596ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodAxis_f3b7030e-5439-404f-8c3d-2a74b0bb14d5" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f13ed9c4-9fc1-4303-9c28-eca4d27596ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_f622e501-05a9-45ab-b45b-dcd29839f5d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f13ed9c4-9fc1-4303-9c28-eca4d27596ec" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodOneMember_f622e501-05a9-45ab-b45b-dcd29839f5d3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_0d550b57-07c2-44c4-97fe-498918856181" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f13ed9c4-9fc1-4303-9c28-eca4d27596ec" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodTwoMember_0d550b57-07c2-44c4-97fe-498918856181" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_f63bc941-de22-4a3f-b788-da40139c4591" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPeriodThreeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentRedemptionPeriodDomain_f13ed9c4-9fc1-4303-9c28-eca4d27596ec" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPeriodThreeMember_f63bc941-de22-4a3f-b788-da40139c4591" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_738b634f-99f9-458b-9a74-63eaf51e2449" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_738b634f-99f9-458b-9a74-63eaf51e2449" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_a483a9f8-26de-4bf5-a38a-a4ff18f582cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_a483a9f8-26de-4bf5-a38a-a4ff18f582cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_35a54c08-fd12-4106-a27b-d5500b51dc5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_35a54c08-fd12-4106-a27b-d5500b51dc5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_b9f94da9-5389-40b5-b31d-3149d5ab632d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed_b9f94da9-5389-40b5-b31d-3149d5ab632d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio_55b27e0c-aa04-4b18-bde0-a9689523735b" xlink:href="aal-20231231.xsd#aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_aal_DebtInstrumentCovenantTermsMinimumCollateralCoverageRatio_55b27e0c-aa04-4b18-bde0-a9689523735b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentSpecialInterestRate_0898ecf9-9ded-4c37-b4b4-57cd52a28c60" xlink:href="aal-20231231.xsd#aal_DebtInstrumentSpecialInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_dab155ef-fdfb-40e1-a57f-78fc5d4118c6" xlink:to="loc_aal_DebtInstrumentSpecialInterestRate_0898ecf9-9ded-4c37-b4b4-57cd52a28c60" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtAAdvantageFinancingDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtAAdvantageFinancingDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtAAdvantageFinancingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_c9020878-c376-4d3d-a318-1b59f4870655" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_us-gaap_DebtInstrumentAxis_c9020878-c376-4d3d-a318-1b59f4870655" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c9020878-c376-4d3d-a318-1b59f4870655_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_c9020878-c376-4d3d-a318-1b59f4870655" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c9020878-c376-4d3d-a318-1b59f4870655_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_65a2dbef-4e1c-4ac7-84ee-273fc53c2c85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_c9020878-c376-4d3d-a318-1b59f4870655" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_65a2dbef-4e1c-4ac7-84ee-273fc53c2c85" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote550Matures2026Member_bed2143c-9e46-4961-bba2-72f5e05a0ba5" xlink:href="aal-20231231.xsd#aal_SeniorNote550Matures2026Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_65a2dbef-4e1c-4ac7-84ee-273fc53c2c85" xlink:to="loc_aal_SeniorNote550Matures2026Member_bed2143c-9e46-4961-bba2-72f5e05a0ba5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote575Matures2029Member_7c308198-d9d9-4431-9d97-6b07e1e90d20" xlink:href="aal-20231231.xsd#aal_SeniorNote575Matures2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_65a2dbef-4e1c-4ac7-84ee-273fc53c2c85" xlink:to="loc_aal_SeniorNote575Matures2029Member_7c308198-d9d9-4431-9d97-6b07e1e90d20" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AAdvantageTermLoanFacilityMember_76b56d13-a14b-4bba-8b9e-4d157572a626" xlink:href="aal-20231231.xsd#aal_AAdvantageTermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_65a2dbef-4e1c-4ac7-84ee-273fc53c2c85" xlink:to="loc_aal_AAdvantageTermLoanFacilityMember_76b56d13-a14b-4bba-8b9e-4d157572a626" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_03b66290-c416-4bd4-8b0a-e1e3edc8cd03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_03b66290-c416-4bd4-8b0a-e1e3edc8cd03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_03b66290-c416-4bd4-8b0a-e1e3edc8cd03_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_03b66290-c416-4bd4-8b0a-e1e3edc8cd03" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_03b66290-c416-4bd4-8b0a-e1e3edc8cd03_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_56d4bdd7-fafc-4c33-bb4e-383ec82450d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_03b66290-c416-4bd4-8b0a-e1e3edc8cd03" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_56d4bdd7-fafc-4c33-bb4e-383ec82450d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_d800bb1a-f40e-4e8d-8692-749c93d9dd7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_56d4bdd7-fafc-4c33-bb4e-383ec82450d0" xlink:to="loc_us-gaap_SeniorNotesMember_d800bb1a-f40e-4e8d-8692-749c93d9dd7f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_0f2e982b-7ef3-48fc-aa40-1f8e6263c3f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_56d4bdd7-fafc-4c33-bb4e-383ec82450d0" xlink:to="loc_us-gaap_SecuredDebtMember_0f2e982b-7ef3-48fc-aa40-1f8e6263c3f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_us-gaap_VariableRateAxis_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39" xlink:to="loc_us-gaap_VariableRateDomain_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_39a0f38d-de82-4694-9040-0e6d1d6cbc62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_83881b8b-e1e7-4fbd-aafb-6ad6485c2e39" xlink:to="loc_us-gaap_VariableRateDomain_39a0f38d-de82-4694-9040-0e6d1d6cbc62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_d57fae68-cc19-400d-8e64-ccffd2807648" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_39a0f38d-de82-4694-9040-0e6d1d6cbc62" xlink:to="loc_us-gaap_BaseRateMember_d57fae68-cc19-400d-8e64-ccffd2807648" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_c5a7cf0b-2014-45a1-a445-230ebbeb9c9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_39a0f38d-de82-4694-9040-0e6d1d6cbc62" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_c5a7cf0b-2014-45a1-a445-230ebbeb9c9a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_08e8bb13-8776-450c-8ddc-6b8447042976" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_srt_RangeAxis_08e8bb13-8776-450c-8ddc-6b8447042976" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_08e8bb13-8776-450c-8ddc-6b8447042976_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_08e8bb13-8776-450c-8ddc-6b8447042976" xlink:to="loc_srt_RangeMember_08e8bb13-8776-450c-8ddc-6b8447042976_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_fe6e3c87-5884-4233-a5cb-b3c3e3bf682f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_08e8bb13-8776-450c-8ddc-6b8447042976" xlink:to="loc_srt_RangeMember_fe6e3c87-5884-4233-a5cb-b3c3e3bf682f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_5dc0d0d4-a2b3-4d65-8d08-4dc7d6e6ff55" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_fe6e3c87-5884-4233-a5cb-b3c3e3bf682f" xlink:to="loc_srt_MinimumMember_5dc0d0d4-a2b3-4d65-8d08-4dc7d6e6ff55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_36d30a06-a721-4439-8fc8-fa50e0742183" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_srt_StatementScenarioAxis_36d30a06-a721-4439-8fc8-fa50e0742183" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_36d30a06-a721-4439-8fc8-fa50e0742183_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_36d30a06-a721-4439-8fc8-fa50e0742183" xlink:to="loc_srt_ScenarioUnspecifiedDomain_36d30a06-a721-4439-8fc8-fa50e0742183_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_6417b4cb-d70d-4c11-85ef-1179b6e0b0ed" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_36d30a06-a721-4439-8fc8-fa50e0742183" xlink:to="loc_srt_ScenarioUnspecifiedDomain_6417b4cb-d70d-4c11-85ef-1179b6e0b0ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_82d480af-af36-4ec0-b6a3-4be264504dd7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_6417b4cb-d70d-4c11-85ef-1179b6e0b0ed" xlink:to="loc_srt_ScenarioForecastMember_82d480af-af36-4ec0-b6a3-4be264504dd7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_de87f755-50a1-4921-b710-45e406f17c5a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2d9f30a3-c1fb-4f39-b5b3-14847143f862" xlink:to="loc_dei_LegalEntityAxis_de87f755-50a1-4921-b710-45e406f17c5a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_de87f755-50a1-4921-b710-45e406f17c5a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_de87f755-50a1-4921-b710-45e406f17c5a" xlink:to="loc_dei_EntityDomain_de87f755-50a1-4921-b710-45e406f17c5a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a5f469c1-ab77-42eb-9d40-90f5b0e37ef5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_de87f755-50a1-4921-b710-45e406f17c5a" xlink:to="loc_dei_EntityDomain_a5f469c1-ab77-42eb-9d40-90f5b0e37ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_a9a6d01e-dc8e-4040-b3f9-e3ff72772fb1" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a5f469c1-ab77-42eb-9d40-90f5b0e37ef5" xlink:to="loc_aal_AmericanAirlinesIncMember_a9a6d01e-dc8e-4040-b3f9-e3ff72772fb1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_5d20962c-4059-415e-bfb8-ccdb45932d88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_5d20962c-4059-415e-bfb8-ccdb45932d88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a0233dd9-ecd4-459b-814c-1240698020c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_a0233dd9-ecd4-459b-814c-1240698020c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_5d88e14a-3411-493e-8a1e-5282a89f5a61" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_5d88e14a-3411-493e-8a1e-5282a89f5a61" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentPeriodicPayment_fe5bdcfb-be2f-42e9-9e36-968ece231f9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentPeriodicPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentPeriodicPayment_fe5bdcfb-be2f-42e9-9e36-968ece231f9e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_7d16d0dc-d8c8-4cd3-bdc0-00123c551ffa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_7d16d0dc-d8c8-4cd3-bdc0-00123c551ffa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_80de6131-8f1c-4a22-a05b-98623ae0221e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_80de6131-8f1c-4a22-a05b-98623ae0221e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_7f206b52-f73c-4b1f-8128-f9cb0e67ec68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_7f206b52-f73c-4b1f-8128-f9cb0e67ec68" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentMandatoryPrepaymentAmountThresholdNetProceedsFromPrePaidFrequentFlyer_47983ab3-c423-4dc0-992c-bbe1806392c2" xlink:href="aal-20231231.xsd#aal_DebtInstrumentMandatoryPrepaymentAmountThresholdNetProceedsFromPrePaidFrequentFlyer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_aal_DebtInstrumentMandatoryPrepaymentAmountThresholdNetProceedsFromPrePaidFrequentFlyer_47983ab3-c423-4dc0-992c-bbe1806392c2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_57b3a467-e1cf-453d-b7e5-b3ea27d921e8" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_57b3a467-e1cf-453d-b7e5-b3ea27d921e8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin_00cd1fa9-651b-49ec-af4e-c608b5673bd4" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateMargin_00cd1fa9-651b-49ec-af4e-c608b5673bd4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateAdjustment_6ee8f074-70ea-4b03-aaf1-84aa3d8d148e" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_0a27b199-a901-4a71-8342-c704dcf066bf" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateInterestRateAdjustment_6ee8f074-70ea-4b03-aaf1-84aa3d8d148e" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtEquipmentLoansandOtherNotesPayableIssuedin2023Details" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtEquipmentLoansandOtherNotesPayableIssuedin2023Details"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtEquipmentLoansandOtherNotesPayableIssuedin2023Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_ef6b3f16-e75b-4d22-b06e-1fe957455298" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ef6b3f16-e75b-4d22-b06e-1fe957455298" xlink:to="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:to="loc_dei_LegalEntityAxis_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5" xlink:to="loc_dei_EntityDomain_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7c6aa8f8-dccb-4a78-ae7c-ddcb6ac3f1da" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f8fa06af-ac25-453d-80b6-3f3c4aabd9a5" xlink:to="loc_dei_EntityDomain_7c6aa8f8-dccb-4a78-ae7c-ddcb6ac3f1da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_9d344a6c-a82b-42b2-a8f6-7476ecb9b16f" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7c6aa8f8-dccb-4a78-ae7c-ddcb6ac3f1da" xlink:to="loc_aal_AmericanAirlinesIncMember_9d344a6c-a82b-42b2-a8f6-7476ecb9b16f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4b385936-b8ee-4755-8de6-7e97ab13cd20" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4b385936-b8ee-4755-8de6-7e97ab13cd20" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4b385936-b8ee-4755-8de6-7e97ab13cd20_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4b385936-b8ee-4755-8de6-7e97ab13cd20" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_4b385936-b8ee-4755-8de6-7e97ab13cd20_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4c84f129-f99a-4aff-be8a-41f16cc46bab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4b385936-b8ee-4755-8de6-7e97ab13cd20" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_4c84f129-f99a-4aff-be8a-41f16cc46bab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_2efc62f5-ad73-4e0c-8ad0-a17724246182" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_4c84f129-f99a-4aff-be8a-41f16cc46bab" xlink:to="loc_us-gaap_SecuredDebtMember_2efc62f5-ad73-4e0c-8ad0-a17724246182" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_a0be2423-d14a-456f-b860-aa52ca595bcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:to="loc_us-gaap_DebtInstrumentAxis_a0be2423-d14a-456f-b860-aa52ca595bcf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a0be2423-d14a-456f-b860-aa52ca595bcf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_a0be2423-d14a-456f-b860-aa52ca595bcf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a0be2423-d14a-456f-b860-aa52ca595bcf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2fdf8d08-2ba5-4489-aa60-a7eb33ae2753" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_a0be2423-d14a-456f-b860-aa52ca595bcf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2fdf8d08-2ba5-4489-aa60-a7eb33ae2753" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_EquipmentLoansAndOtherNotesPayableIssuedInCurrentYearMember_0ae8b44f-2abe-4ad9-b9a9-f6422d5a50eb" xlink:href="aal-20231231.xsd#aal_EquipmentLoansAndOtherNotesPayableIssuedInCurrentYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_2fdf8d08-2ba5-4489-aa60-a7eb33ae2753" xlink:to="loc_aal_EquipmentLoansAndOtherNotesPayableIssuedInCurrentYearMember_0ae8b44f-2abe-4ad9-b9a9-f6422d5a50eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_838e80a6-a307-49cf-818f-d6526455ba3a" xlink:to="loc_us-gaap_VariableRateAxis_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58" xlink:to="loc_us-gaap_VariableRateDomain_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_e3050ab8-d799-4ff4-a36b-dcad5b6d936b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_92bcf345-3ad7-4c89-bdf5-b5fd3ef9ef58" xlink:to="loc_us-gaap_VariableRateDomain_e3050ab8-d799-4ff4-a36b-dcad5b6d936b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_05af92b3-9f4c-4532-8e6c-0495b15c88a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_e3050ab8-d799-4ff4-a36b-dcad5b6d936b" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_05af92b3-9f4c-4532-8e6c-0495b15c88a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSecuredNotesPayable_ec01dfab-aa48-42a6-a017-966495bde054" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromSecuredNotesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ef6b3f16-e75b-4d22-b06e-1fe957455298" xlink:to="loc_us-gaap_ProceedsFromSecuredNotesPayable_ec01dfab-aa48-42a6-a017-966495bde054" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_899dacf8-fc5d-4911-a851-3078b1b6d777" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtWeightedAverageInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_ef6b3f16-e75b-4d22-b06e-1fe957455298" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_899dacf8-fc5d-4911-a851-3078b1b6d777" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtSpecialFacilityRevenueBondsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtSpecialFacilityRevenueBondsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtSpecialFacilityRevenueBondsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_67fb1e12-23c8-4029-844d-c68dba0dd0dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_4e86ad9d-983f-424b-a997-12593b071950" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_67fb1e12-23c8-4029-844d-c68dba0dd0dc" xlink:to="loc_us-gaap_DebtInstrumentTable_4e86ad9d-983f-424b-a997-12593b071950" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d85d8557-d83c-46aa-82df-cfa4afe5acd1" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4e86ad9d-983f-424b-a997-12593b071950" xlink:to="loc_dei_LegalEntityAxis_d85d8557-d83c-46aa-82df-cfa4afe5acd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d85d8557-d83c-46aa-82df-cfa4afe5acd1_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d85d8557-d83c-46aa-82df-cfa4afe5acd1" xlink:to="loc_dei_EntityDomain_d85d8557-d83c-46aa-82df-cfa4afe5acd1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_fb4b237d-a982-45ce-8591-5d33b294fa2c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d85d8557-d83c-46aa-82df-cfa4afe5acd1" xlink:to="loc_dei_EntityDomain_fb4b237d-a982-45ce-8591-5d33b294fa2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_46a1b8de-e44c-40a2-a92e-3374a4e3bc64" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_fb4b237d-a982-45ce-8591-5d33b294fa2c" xlink:to="loc_aal_AmericanAirlinesIncMember_46a1b8de-e44c-40a2-a92e-3374a4e3bc64" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_d78ed9a1-443d-430a-b886-8accdb2e9335" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4e86ad9d-983f-424b-a997-12593b071950" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_d78ed9a1-443d-430a-b886-8accdb2e9335" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d78ed9a1-443d-430a-b886-8accdb2e9335_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d78ed9a1-443d-430a-b886-8accdb2e9335" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d78ed9a1-443d-430a-b886-8accdb2e9335_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_58160587-4ce3-4c39-bc76-5ca2239f6d6f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_d78ed9a1-443d-430a-b886-8accdb2e9335" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_58160587-4ce3-4c39-bc76-5ca2239f6d6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_3445f4a0-0d78-4bda-9a08-62dfc48a9f97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_58160587-4ce3-4c39-bc76-5ca2239f6d6f" xlink:to="loc_us-gaap_SecuredDebtMember_3445f4a0-0d78-4bda-9a08-62dfc48a9f97" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_c5ba46fb-d656-4dce-b412-04764b291d9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_67fb1e12-23c8-4029-844d-c68dba0dd0dc" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_c5ba46fb-d656-4dce-b412-04764b291d9c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_662cbfe1-bd71-4972-89a5-b6695ef3e6da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_67fb1e12-23c8-4029-844d-c68dba0dd0dc" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_662cbfe1-bd71-4972-89a5-b6695ef3e6da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e13782e7-f541-4c33-b064-96bd2ec4ecdf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_67fb1e12-23c8-4029-844d-c68dba0dd0dc" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_e13782e7-f541-4c33-b064-96bd2ec4ecdf" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtPSPPromissoryNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtPSPPromissoryNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtPSPPromissoryNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_8fd28c65-719f-4488-a629-a3eeb07ce7d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_us-gaap_DebtInstrumentTable_8fd28c65-719f-4488-a629-a3eeb07ce7d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_eca9b9a6-f240-4202-861c-2795eaa728e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8fd28c65-719f-4488-a629-a3eeb07ce7d4" xlink:to="loc_us-gaap_DebtInstrumentAxis_eca9b9a6-f240-4202-861c-2795eaa728e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_eca9b9a6-f240-4202-861c-2795eaa728e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_eca9b9a6-f240-4202-861c-2795eaa728e9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_eca9b9a6-f240-4202-861c-2795eaa728e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2f49c652-e21a-4a0d-aa4d-e572c9e7f458" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_eca9b9a6-f240-4202-861c-2795eaa728e9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2f49c652-e21a-4a0d-aa4d-e572c9e7f458" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteCARESActMember_7ad6576a-d844-40ba-87aa-a3a87930dce3" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_2f49c652-e21a-4a0d-aa4d-e572c9e7f458" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteCARESActMember_7ad6576a-d844-40ba-87aa-a3a87930dce3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioAxis_de90dd19-9bd0-4200-9117-d50b0d5cddb9" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8fd28c65-719f-4488-a629-a3eeb07ce7d4" xlink:to="loc_aal_InterestRateScenarioAxis_de90dd19-9bd0-4200-9117-d50b0d5cddb9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioDomain_de90dd19-9bd0-4200-9117-d50b0d5cddb9_default" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_aal_InterestRateScenarioAxis_de90dd19-9bd0-4200-9117-d50b0d5cddb9" xlink:to="loc_aal_InterestRateScenarioDomain_de90dd19-9bd0-4200-9117-d50b0d5cddb9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateScenarioDomain_ab0506d4-a996-449a-afac-972d589ca7f9" xlink:href="aal-20231231.xsd#aal_InterestRateScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_aal_InterestRateScenarioAxis_de90dd19-9bd0-4200-9117-d50b0d5cddb9" xlink:to="loc_aal_InterestRateScenarioDomain_ab0506d4-a996-449a-afac-972d589ca7f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateFirstFiveYearsMember_44b76882-ccaf-4822-919e-a650810994fb" xlink:href="aal-20231231.xsd#aal_InterestRateFirstFiveYearsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_InterestRateScenarioDomain_ab0506d4-a996-449a-afac-972d589ca7f9" xlink:to="loc_aal_InterestRateFirstFiveYearsMember_44b76882-ccaf-4822-919e-a650810994fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InterestRateYearsSixThroughTenMember_b06bbbbe-e444-483b-bf7d-09c4969e16aa" xlink:href="aal-20231231.xsd#aal_InterestRateYearsSixThroughTenMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_InterestRateScenarioDomain_ab0506d4-a996-449a-afac-972d589ca7f9" xlink:to="loc_aal_InterestRateYearsSixThroughTenMember_b06bbbbe-e444-483b-bf7d-09c4969e16aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_d7107141-0276-4f2e-ad5d-c99b46912c25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_8fd28c65-719f-4488-a629-a3eeb07ce7d4" xlink:to="loc_us-gaap_VariableRateAxis_d7107141-0276-4f2e-ad5d-c99b46912c25" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_d7107141-0276-4f2e-ad5d-c99b46912c25_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_d7107141-0276-4f2e-ad5d-c99b46912c25" xlink:to="loc_us-gaap_VariableRateDomain_d7107141-0276-4f2e-ad5d-c99b46912c25_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_8ecbdeea-6d50-4ee5-bc6f-83d3d6fd1595" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_d7107141-0276-4f2e-ad5d-c99b46912c25" xlink:to="loc_us-gaap_VariableRateDomain_8ecbdeea-6d50-4ee5-bc6f-83d3d6fd1595" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SecuredOvernightFinancingRateOrOtherMember_11180f2f-1bff-42d6-bf82-285a048a775a" xlink:href="aal-20231231.xsd#aal_SecuredOvernightFinancingRateOrOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_8ecbdeea-6d50-4ee5-bc6f-83d3d6fd1595" xlink:to="loc_aal_SecuredOvernightFinancingRateOrOtherMember_11180f2f-1bff-42d6-bf82-285a048a775a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_db23ab8c-2af6-4687-a32b-88a30d43baea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_db23ab8c-2af6-4687-a32b-88a30d43baea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_66646655-6be7-4114-b50c-6c7bcfd3be8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_66646655-6be7-4114-b50c-6c7bcfd3be8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_8b89605d-a2bb-4d10-ae9e-b5f1fcefb11e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_8b89605d-a2bb-4d10-ae9e-b5f1fcefb11e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_13615570-4388-49e6-ba21-238014583534" xlink:href="aal-20231231.xsd#aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_aal_DebtInstrumentBasisSpreadOnVariableRateFloorInterestRate_13615570-4388-49e6-ba21-238014583534" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentPrepaymentTriggerNumberOfDaysWithinTheOccurrenceOfTriggeringEvent_0c86e6b9-4590-4908-9819-0d40125d65ac" xlink:href="aal-20231231.xsd#aal_DebtInstrumentPrepaymentTriggerNumberOfDaysWithinTheOccurrenceOfTriggeringEvent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9cae6328-36ba-4e24-9b64-97ee0a2dcbd4" xlink:to="loc_aal_DebtInstrumentPrepaymentTriggerNumberOfDaysWithinTheOccurrenceOfTriggeringEvent_0c86e6b9-4590-4908-9819-0d40125d65ac" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/Debt650ConvertibleSeniorNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#Debt650ConvertibleSeniorNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt650ConvertibleSeniorNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_f34483c7-12f7-4428-95db-a60145f2908c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentTable_f34483c7-12f7-4428-95db-a60145f2908c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f34483c7-12f7-4428-95db-a60145f2908c" xlink:to="loc_us-gaap_DebtInstrumentAxis_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_0386598a-8f32-4d47-8865-ae62adcecb64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4eec3f9b-987b-4f2a-a4bc-4bb1a6c3a2a9" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_0386598a-8f32-4d47-8865-ae62adcecb64" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_e0f69b55-cd08-4518-9497-acfd6df75c35" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_0386598a-8f32-4d47-8865-ae62adcecb64" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_e0f69b55-cd08-4518-9497-acfd6df75c35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f34483c7-12f7-4428-95db-a60145f2908c" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_1418d61a-bf78-4a12-b7f4-bd781ffd9810" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_b4cdfaa7-4da2-48f3-8d1e-c32cdf037a4f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_1418d61a-bf78-4a12-b7f4-bd781ffd9810" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_428321ca-ad76-4022-a4ce-2c867f6f826c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_1418d61a-bf78-4a12-b7f4-bd781ffd9810" xlink:to="loc_us-gaap_SeniorNotesMember_428321ca-ad76-4022-a4ce-2c867f6f826c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtConversionScenarioAxis_3deb3264-d8f9-4bb5-bfb3-14b2949cede1" xlink:href="aal-20231231.xsd#aal_DebtConversionScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f34483c7-12f7-4428-95db-a60145f2908c" xlink:to="loc_aal_DebtConversionScenarioAxis_3deb3264-d8f9-4bb5-bfb3-14b2949cede1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtConversionScenarioDomain_3deb3264-d8f9-4bb5-bfb3-14b2949cede1_default" xlink:href="aal-20231231.xsd#aal_DebtConversionScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_aal_DebtConversionScenarioAxis_3deb3264-d8f9-4bb5-bfb3-14b2949cede1" xlink:to="loc_aal_DebtConversionScenarioDomain_3deb3264-d8f9-4bb5-bfb3-14b2949cede1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtConversionScenarioDomain_b0ccf108-66a3-40cf-b364-8b55686b04b0" xlink:href="aal-20231231.xsd#aal_DebtConversionScenarioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_aal_DebtConversionScenarioAxis_3deb3264-d8f9-4bb5-bfb3-14b2949cede1" xlink:to="loc_aal_DebtConversionScenarioDomain_b0ccf108-66a3-40cf-b364-8b55686b04b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtConversionScenarioOneMember_26f1389b-8f62-40b7-9586-ed323cd56177" xlink:href="aal-20231231.xsd#aal_DebtConversionScenarioOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_DebtConversionScenarioDomain_b0ccf108-66a3-40cf-b364-8b55686b04b0" xlink:to="loc_aal_DebtConversionScenarioOneMember_26f1389b-8f62-40b7-9586-ed323cd56177" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtConversionScenarioTwoMember_a05fe3d9-7357-4bc9-b8f5-37225dd7f29c" xlink:href="aal-20231231.xsd#aal_DebtConversionScenarioTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_DebtConversionScenarioDomain_b0ccf108-66a3-40cf-b364-8b55686b04b0" xlink:to="loc_aal_DebtConversionScenarioTwoMember_a05fe3d9-7357-4bc9-b8f5-37225dd7f29c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2b47e9ab-6eb8-40c3-bde6-ae96f38993bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2b47e9ab-6eb8-40c3-bde6-ae96f38993bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_9b8b02af-ca21-4104-a3b2-126246503445" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_9b8b02af-ca21-4104-a3b2-126246503445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_18be1ac9-b8b8-4b01-ae8b-29618b7885eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_18be1ac9-b8b8-4b01-ae8b-29618b7885eb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_b9fdfeed-cf3e-4471-8607-9ffa56d56f87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleConversionRatio1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionRatio1_b9fdfeed-cf3e-4471-8607-9ffa56d56f87" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_e210d4e6-84e6-4afd-8cbf-53e1356fa164" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleConversionPrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentConvertibleConversionPrice1_e210d4e6-84e6-4afd-8cbf-53e1356fa164" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_c03c4190-29f0-405b-b041-67c6e270639f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdPercentageOfStockPriceTrigger_c03c4190-29f0-405b-b041-67c6e270639f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_bd6403aa-0e97-42e1-9b57-f5e84031afe5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleThresholdTradingDays"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdTradingDays_bd6403aa-0e97-42e1-9b57-f5e84031afe5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_a8eba18d-8dd3-4ac2-aa4a-9b6a829667e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentConvertibleThresholdConsecutiveTradingDays1_a8eba18d-8dd3-4ac2-aa4a-9b6a829667e8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleDebtConversionTermsMeasurementPeriodTradingPriceThresholdPercentage_2606ab22-c652-4880-9b3c-bdea5f94d3c9" xlink:href="aal-20231231.xsd#aal_ConvertibleDebtConversionTermsMeasurementPeriodTradingPriceThresholdPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_aal_ConvertibleDebtConversionTermsMeasurementPeriodTradingPriceThresholdPercentage_2606ab22-c652-4880-9b3c-bdea5f94d3c9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_c8b876c7-8472-44b4-9534-a740879636ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_bdf08ed8-56dd-4740-b6c3-f4132f4d73ba" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_c8b876c7-8472-44b4-9534-a740879636ad" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtScheduleofConvertibleNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtScheduleofConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtScheduleofConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_d486ec59-df4f-4739-8a62-45967f72c459" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_f81c5d60-12b3-4287-ac39-5abea2bebede" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d486ec59-df4f-4739-8a62-45967f72c459" xlink:to="loc_us-gaap_DebtInstrumentTable_f81c5d60-12b3-4287-ac39-5abea2bebede" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f81c5d60-12b3-4287-ac39-5abea2bebede" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e57a07ec-33c6-42b9-bb33-a25775e78113" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c6b7f5d9-ade4-4dc2-a8f2-d32b369558b7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e57a07ec-33c6-42b9-bb33-a25775e78113" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_bd6ef871-0d43-4988-b0b1-3dcdc9d893fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e57a07ec-33c6-42b9-bb33-a25775e78113" xlink:to="loc_us-gaap_SeniorNotesMember_bd6ef871-0d43-4988-b0b1-3dcdc9d893fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f81c5d60-12b3-4287-ac39-5abea2bebede" xlink:to="loc_us-gaap_DebtInstrumentAxis_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6a9b9498-2698-4f46-8a4b-616f70f474e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_05cc6f90-a6ba-438d-998a-0b7dd1dfdbc1" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6a9b9498-2698-4f46-8a4b-616f70f474e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_b7a2afe7-ac04-4be8-a58c-265d6934c1a3" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6a9b9498-2698-4f46-8a4b-616f70f474e3" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_b7a2afe7-ac04-4be8-a58c-265d6934c1a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_87907f23-73e6-4b68-bb1d-6f02febcb4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d486ec59-df4f-4739-8a62-45967f72c459" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_87907f23-73e6-4b68-bb1d-6f02febcb4bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscount_63726a76-60e5-4db2-a2bc-8c46f7f4e75d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentUnamortizedDiscount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d486ec59-df4f-4739-8a62-45967f72c459" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscount_63726a76-60e5-4db2-a2bc-8c46f7f4e75d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_b0d3bb91-b3ec-4f6a-af4e-dfbf6f449ca2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_d486ec59-df4f-4739-8a62-45967f72c459" xlink:to="loc_us-gaap_LongTermDebt_b0d3bb91-b3ec-4f6a-af4e-dfbf6f449ca2" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtScheduleofInterestRecognizedforConvertibleNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtScheduleofInterestRecognizedforConvertibleNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtScheduleofInterestRecognizedforConvertibleNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_cdcf21ab-1ba7-4b8d-a9d9-307de60ac4e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:to="loc_us-gaap_DebtInstrumentTable_cdcf21ab-1ba7-4b8d-a9d9-307de60ac4e8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cdcf21ab-1ba7-4b8d-a9d9-307de60ac4e8" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_77125534-cad7-4f3f-86ae-76e674a07740" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8a081668-a1ec-4a52-bdc3-eb8d53eeaee4" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_77125534-cad7-4f3f-86ae-76e674a07740" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_c47a8698-7ea8-4ce7-933e-e140db3b8c2d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_77125534-cad7-4f3f-86ae-76e674a07740" xlink:to="loc_us-gaap_SeniorNotesMember_c47a8698-7ea8-4ce7-933e-e140db3b8c2d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_4b63d754-f689-4570-a061-39adbab85273" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_cdcf21ab-1ba7-4b8d-a9d9-307de60ac4e8" xlink:to="loc_us-gaap_DebtInstrumentAxis_4b63d754-f689-4570-a061-39adbab85273" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_4b63d754-f689-4570-a061-39adbab85273_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_4b63d754-f689-4570-a061-39adbab85273" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_4b63d754-f689-4570-a061-39adbab85273_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ad8a5fab-1cc2-47e2-a994-c18f510ea2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_4b63d754-f689-4570-a061-39adbab85273" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ad8a5fab-1cc2-47e2-a994-c18f510ea2ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_4e2ff90d-5081-4308-a067-3f16830bb96c" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ad8a5fab-1cc2-47e2-a994-c18f510ea2ce" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_4e2ff90d-5081-4308-a067-3f16830bb96c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebtExcludingAmortization_8192b391-0e30-4061-89ad-213efa9740d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseDebtExcludingAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:to="loc_us-gaap_InterestExpenseDebtExcludingAmortization_8192b391-0e30-4061-89ad-213efa9740d2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_ccddb8fa-2bed-44fa-bab2-a7696517f2db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AmortizationOfFinancingCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_ccddb8fa-2bed-44fa-bab2-a7696517f2db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseDebt_5b3cf11b-1e0a-4d35-86bb-c4f6d55eb566" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpenseDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:to="loc_us-gaap_InterestExpenseDebt_5b3cf11b-1e0a-4d35-86bb-c4f6d55eb566" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_c4b283b4-9036-4bb7-a52a-63e087546cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1e9b32eb-2d1f-4c9c-8f46-5ce64ae91754" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_c4b283b4-9036-4bb7-a52a-63e087546cf6" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtUnsecuredSeniorNotesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtUnsecuredSeniorNotesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtUnsecuredSeniorNotesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_f7fab5f0-da62-4663-a913-3f5d5b035c17" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_105aa804-0ed0-4b4f-a003-1c2f44d047b5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f7fab5f0-da62-4663-a913-3f5d5b035c17" xlink:to="loc_us-gaap_DebtInstrumentTable_105aa804-0ed0-4b4f-a003-1c2f44d047b5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_105aa804-0ed0-4b4f-a003-1c2f44d047b5" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e7757498-56a7-4cbf-b232-624e63a3d50d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e8eea65d-c3bf-4ba0-88c5-abdaaf98481d" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e7757498-56a7-4cbf-b232-624e63a3d50d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_c871472d-82d2-4619-9adf-52686d8306ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e7757498-56a7-4cbf-b232-624e63a3d50d" xlink:to="loc_us-gaap_UnsecuredDebtMember_c871472d-82d2-4619-9adf-52686d8306ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_622ccc08-345c-4677-a1cc-9c6b42e0b670" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_105aa804-0ed0-4b4f-a003-1c2f44d047b5" xlink:to="loc_us-gaap_DebtInstrumentAxis_622ccc08-345c-4677-a1cc-9c6b42e0b670" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_622ccc08-345c-4677-a1cc-9c6b42e0b670_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_622ccc08-345c-4677-a1cc-9c6b42e0b670" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_622ccc08-345c-4677-a1cc-9c6b42e0b670_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a3e014d2-bc3d-451f-bcdd-5c798a4dc2e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_622ccc08-345c-4677-a1cc-9c6b42e0b670" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a3e014d2-bc3d-451f-bcdd-5c798a4dc2e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote375Matures2025Member_eeb99dad-2c95-4b70-b6b2-da4a494c8d1d" xlink:href="aal-20231231.xsd#aal_SeniorNote375Matures2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a3e014d2-bc3d-451f-bcdd-5c798a4dc2e9" xlink:to="loc_aal_SeniorNote375Matures2025Member_eeb99dad-2c95-4b70-b6b2-da4a494c8d1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7b8015a7-5ec4-45e7-966e-ed56d16e8212" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f7fab5f0-da62-4663-a913-3f5d5b035c17" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_7b8015a7-5ec4-45e7-966e-ed56d16e8212" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_39bea76b-c34d-4ba3-b2d5-734f50efce85" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_f7fab5f0-da62-4663-a913-3f5d5b035c17" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_39bea76b-c34d-4ba3-b2d5-734f50efce85" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtOtherFinancingActivitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtOtherFinancingActivitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtOtherFinancingActivitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_5572a091-6e2f-4708-b15d-e0745b70eaa9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_1c5ad9cb-593b-4ad7-907e-65b6102eab67" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5572a091-6e2f-4708-b15d-e0745b70eaa9" xlink:to="loc_us-gaap_DebtInstrumentTable_1c5ad9cb-593b-4ad7-907e-65b6102eab67" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1c5ad9cb-593b-4ad7-907e-65b6102eab67" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8dcd09d5-1bb6-4cd7-ba18-86b1738857cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4b451c81-0ab2-4eef-8ab3-68dd65f3b10f" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8dcd09d5-1bb6-4cd7-ba18-86b1738857cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SecuredAndUnsecuredDebtMember_1f42ff77-8dae-4883-b8bc-a8ebbfb72ccc" xlink:href="aal-20231231.xsd#aal_SecuredAndUnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8dcd09d5-1bb6-4cd7-ba18-86b1738857cd" xlink:to="loc_aal_SecuredAndUnsecuredDebtMember_1f42ff77-8dae-4883-b8bc-a8ebbfb72ccc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_a1ae36e3-e50d-4a1c-8be0-36088ec752cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8dcd09d5-1bb6-4cd7-ba18-86b1738857cd" xlink:to="loc_us-gaap_SecuredDebtMember_a1ae36e3-e50d-4a1c-8be0-36088ec752cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_e1d8479e-b48b-484c-9a96-15c24c35a759" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_1c5ad9cb-593b-4ad7-907e-65b6102eab67" xlink:to="loc_dei_LegalEntityAxis_e1d8479e-b48b-484c-9a96-15c24c35a759" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e1d8479e-b48b-484c-9a96-15c24c35a759_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_e1d8479e-b48b-484c-9a96-15c24c35a759" xlink:to="loc_dei_EntityDomain_e1d8479e-b48b-484c-9a96-15c24c35a759_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4cffe78a-fc1f-493e-a77f-6c96b63c0b29" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_e1d8479e-b48b-484c-9a96-15c24c35a759" xlink:to="loc_dei_EntityDomain_4cffe78a-fc1f-493e-a77f-6c96b63c0b29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_07686106-5877-475f-bab4-d225c74f5525" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4cffe78a-fc1f-493e-a77f-6c96b63c0b29" xlink:to="loc_aal_AmericanAirlinesIncMember_07686106-5877-475f-bab4-d225c74f5525" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRepurchaseAmount_f202a4cd-dfb9-4f37-94bd-225464f623df" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentRepurchaseAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5572a091-6e2f-4708-b15d-e0745b70eaa9" xlink:to="loc_us-gaap_DebtInstrumentRepurchaseAmount_f202a4cd-dfb9-4f37-94bd-225464f623df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PaymentOfMakeWholePremium_c783801b-0a8c-40fc-ab71-d5571420111b" xlink:href="aal-20231231.xsd#aal_PaymentOfMakeWholePremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5572a091-6e2f-4708-b15d-e0745b70eaa9" xlink:to="loc_aal_PaymentOfMakeWholePremium_c783801b-0a8c-40fc-ab71-d5571420111b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff_dfb4548f-fff3-487c-b27b-14d88880ea31" xlink:href="aal-20231231.xsd#aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_5572a091-6e2f-4708-b15d-e0745b70eaa9" xlink:to="loc_aal_DeferredDebtIssuanceCostAndDebtDiscountWriteoff_dfb4548f-fff3-487c-b27b-14d88880ea31" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtGuaranteesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtGuaranteesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtGuaranteesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_29a0fbe6-6953-480b-8c18-3ec06b717bbc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_9d2c45d3-cb91-47b1-9a22-77ab8b4cd074" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_29a0fbe6-6953-480b-8c18-3ec06b717bbc" xlink:to="loc_us-gaap_DebtInstrumentTable_9d2c45d3-cb91-47b1-9a22-77ab8b4cd074" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_0a6bb447-6d56-4308-87ed-12d4729924ef" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9d2c45d3-cb91-47b1-9a22-77ab8b4cd074" xlink:to="loc_dei_LegalEntityAxis_0a6bb447-6d56-4308-87ed-12d4729924ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0a6bb447-6d56-4308-87ed-12d4729924ef_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0a6bb447-6d56-4308-87ed-12d4729924ef" xlink:to="loc_dei_EntityDomain_0a6bb447-6d56-4308-87ed-12d4729924ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a6e284d0-f85c-4b71-af97-01a5ea802428" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0a6bb447-6d56-4308-87ed-12d4729924ef" xlink:to="loc_dei_EntityDomain_a6e284d0-f85c-4b71-af97-01a5ea802428" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_710bdc6e-ab01-47f1-8627-aeed2edd7bab" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a6e284d0-f85c-4b71-af97-01a5ea802428" xlink:to="loc_aal_AmericanAirlinesIncMember_710bdc6e-ab01-47f1-8627-aeed2edd7bab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_32568eca-bb2e-4898-9de1-2082b72d91c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9d2c45d3-cb91-47b1-9a22-77ab8b4cd074" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_32568eca-bb2e-4898-9de1-2082b72d91c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_32568eca-bb2e-4898-9de1-2082b72d91c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_32568eca-bb2e-4898-9de1-2082b72d91c1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_32568eca-bb2e-4898-9de1-2082b72d91c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2ae5f88f-1097-4e41-ad85-887aaa06b900" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_32568eca-bb2e-4898-9de1-2082b72d91c1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2ae5f88f-1097-4e41-ad85-887aaa06b900" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_5c60ee49-9f06-4f7e-aa7b-395724a8280d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2ae5f88f-1097-4e41-ad85-887aaa06b900" xlink:to="loc_us-gaap_SecuredDebtMember_5c60ee49-9f06-4f7e-aa7b-395724a8280d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_91c8d8d6-2c2f-4b06-958c-7aa8285f8989" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2ae5f88f-1097-4e41-ad85-887aaa06b900" xlink:to="loc_us-gaap_UnsecuredDebtMember_91c8d8d6-2c2f-4b06-958c-7aa8285f8989" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2dbb9df0-c943-4106-b315-e95a9f36bb9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9d2c45d3-cb91-47b1-9a22-77ab8b4cd074" xlink:to="loc_us-gaap_DebtInstrumentAxis_2dbb9df0-c943-4106-b315-e95a9f36bb9b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2dbb9df0-c943-4106-b315-e95a9f36bb9b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2dbb9df0-c943-4106-b315-e95a9f36bb9b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2dbb9df0-c943-4106-b315-e95a9f36bb9b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2dbb9df0-c943-4106-b315-e95a9f36bb9b" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_119a1444-4e28-4b20-b199-dda8650027c4" xlink:href="aal-20231231.xsd#aal_SpecialFacilityRevenueBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_119a1444-4e28-4b20-b199-dda8650027c4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_da7d783c-7226-42bd-8cb1-972482f9b9f5" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteOneCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_da7d783c-7226-42bd-8cb1-972482f9b9f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember_e6176f03-a0dc-4767-8a0c-bb3a49be0a72" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteTwoCARESActMember_e6176f03-a0dc-4767-8a0c-bb3a49be0a72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember_a9699c9f-b21e-470b-ae3a-a3dc2e1a4b72" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteThreeCARESActMember_a9699c9f-b21e-470b-ae3a-a3dc2e1a4b72" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_598b7965-9b5e-4819-bdb6-396332d638a5" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_598b7965-9b5e-4819-bdb6-396332d638a5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote375Matures2025Member_0b0aee2b-91c4-43b4-ace6-fae938391475" xlink:href="aal-20231231.xsd#aal_SeniorNote375Matures2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_a28dc656-1eb6-445d-a9e1-e46b03b82029" xlink:to="loc_aal_SeniorNote375Matures2025Member_0b0aee2b-91c4-43b4-ace6-fae938391475" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_8be6a156-8a8d-45ad-bb86-13d05feb593c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_29a0fbe6-6953-480b-8c18-3ec06b717bbc" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_8be6a156-8a8d-45ad-bb86-13d05feb593c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_4f71afea-6582-49ac-87ed-4251541b41d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_29a0fbe6-6953-480b-8c18-3ec06b717bbc" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_4f71afea-6582-49ac-87ed-4251541b41d1" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/DebtCertainCovenantsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#DebtCertainCovenantsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtCertainCovenantsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_bab2e6fe-69e1-49b3-abdf-0269d2e31604" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_us-gaap_DebtInstrumentTable_bab2e6fe-69e1-49b3-abdf-0269d2e31604" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_00f1f287-3070-4a41-8244-c59b8fd3edeb" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bab2e6fe-69e1-49b3-abdf-0269d2e31604" xlink:to="loc_dei_LegalEntityAxis_00f1f287-3070-4a41-8244-c59b8fd3edeb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_00f1f287-3070-4a41-8244-c59b8fd3edeb_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_00f1f287-3070-4a41-8244-c59b8fd3edeb" xlink:to="loc_dei_EntityDomain_00f1f287-3070-4a41-8244-c59b8fd3edeb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_935a9cd5-e72b-4b25-878f-7acdc2d23eec" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_00f1f287-3070-4a41-8244-c59b8fd3edeb" xlink:to="loc_dei_EntityDomain_935a9cd5-e72b-4b25-878f-7acdc2d23eec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_11fa6368-133d-4c25-beeb-2ba627388e1a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_935a9cd5-e72b-4b25-878f-7acdc2d23eec" xlink:to="loc_aal_AmericanAirlinesIncMember_11fa6368-133d-4c25-beeb-2ba627388e1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_33e70dda-f495-4526-bca6-b4a50d6a7ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bab2e6fe-69e1-49b3-abdf-0269d2e31604" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_33e70dda-f495-4526-bca6-b4a50d6a7ed3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_33e70dda-f495-4526-bca6-b4a50d6a7ed3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_33e70dda-f495-4526-bca6-b4a50d6a7ed3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_33e70dda-f495-4526-bca6-b4a50d6a7ed3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0bfbea6c-c833-460d-9070-c5465e468c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_33e70dda-f495-4526-bca6-b4a50d6a7ed3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0bfbea6c-c833-460d-9070-c5465e468c9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_4629077f-2e64-4eaf-9617-f9450df52c6d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_0bfbea6c-c833-460d-9070-c5465e468c9c" xlink:to="loc_us-gaap_SecuredDebtMember_4629077f-2e64-4eaf-9617-f9450df52c6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f73fb4b4-58f3-4917-8318-5a5cf334da21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_bab2e6fe-69e1-49b3-abdf-0269d2e31604" xlink:to="loc_us-gaap_DebtInstrumentAxis_f73fb4b4-58f3-4917-8318-5a5cf334da21" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f73fb4b4-58f3-4917-8318-5a5cf334da21_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f73fb4b4-58f3-4917-8318-5a5cf334da21" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f73fb4b4-58f3-4917-8318-5a5cf334da21_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f73fb4b4-58f3-4917-8318-5a5cf334da21" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2013Member_86af5917-ce3b-45ae-ad8a-f66aa4742869" xlink:href="aal-20231231.xsd#aal_CreditFacility2013Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_CreditFacility2013Member_86af5917-ce3b-45ae-ad8a-f66aa4742869" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A725SeniorSecuredNotesDue2028Member_41a47862-f5b0-436b-b6b7-0699a9f293ea" xlink:href="aal-20231231.xsd#aal_A725SeniorSecuredNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A725SeniorSecuredNotesDue2028Member_41a47862-f5b0-436b-b6b7-0699a9f293ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CreditFacility2014Member_56c099f3-563b-494e-b1fc-60b400a15ccb" xlink:href="aal-20231231.xsd#aal_CreditFacility2014Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_CreditFacility2014Member_56c099f3-563b-494e-b1fc-60b400a15ccb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A2023TermLoanFacilityMember_504c3249-ed0e-4fc8-95a9-03a78aae2b39" xlink:href="aal-20231231.xsd#aal_A2023TermLoanFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A2023TermLoanFacilityMember_504c3249-ed0e-4fc8-95a9-03a78aae2b39" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A850SeniorSecuredNotesDue2029Member_82fd7479-05d3-4685-b2aa-8e95436591bd" xlink:href="aal-20231231.xsd#aal_A850SeniorSecuredNotesDue2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A850SeniorSecuredNotesDue2029Member_82fd7479-05d3-4685-b2aa-8e95436591bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A1075SeniorSecuredNotesMember_edd8ea15-fd5f-4eca-a7c9-0e51458bc860" xlink:href="aal-20231231.xsd#aal_A1075SeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A1075SeniorSecuredNotesMember_edd8ea15-fd5f-4eca-a7c9-0e51458bc860" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A2013CreditFacilityAnd7.25SeniorSecuredNotesMember_ed59774f-8364-444c-afa1-0601810b7c4a" xlink:href="aal-20231231.xsd#aal_A2013CreditFacilityAnd7.25SeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A2013CreditFacilityAnd7.25SeniorSecuredNotesMember_ed59774f-8364-444c-afa1-0601810b7c4a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A2023TermLoanFacilityAnd8.50SeniorSecuredNotesMember_50854f3c-dc55-4cda-8af4-3f45b2458550" xlink:href="aal-20231231.xsd#aal_A2023TermLoanFacilityAnd8.50SeniorSecuredNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6d72d0ad-48d6-4b7a-a117-996fd05b7125" xlink:to="loc_aal_A2023TermLoanFacilityAnd8.50SeniorSecuredNotesMember_50854f3c-dc55-4cda-8af4-3f45b2458550" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LineOfCreditFacilityCovenantTermsMinimumAggregateLiquidityRequired_3803c653-12aa-42f0-bea5-f0cf193c2df3" xlink:href="aal-20231231.xsd#aal_LineOfCreditFacilityCovenantTermsMinimumAggregateLiquidityRequired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_aal_LineOfCreditFacilityCovenantTermsMinimumAggregateLiquidityRequired_3803c653-12aa-42f0-bea5-f0cf193c2df3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_582da73e-ade8-4aaf-8356-cad8d6bdb215" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_582da73e-ade8-4aaf-8356-cad8d6bdb215" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier_3341a8b0-96e6-4a07-9e52-d45dd198c396" xlink:href="aal-20231231.xsd#aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier_3341a8b0-96e6-4a07-9e52-d45dd198c396" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio_0ca4b258-a47e-4ee0-8f4b-50c978baec92" xlink:href="aal-20231231.xsd#aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio_0ca4b258-a47e-4ee0-8f4b-50c978baec92" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LtvAsOfMeasurementDate_abae707f-5816-4bea-b0f5-e201b4636bb3" xlink:href="aal-20231231.xsd#aal_LtvAsOfMeasurementDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_12f0aaaa-0730-4983-89f4-8c7be6416819" xlink:to="loc_aal_LtvAsOfMeasurementDate_abae707f-5816-4bea-b0f5-e201b4636bb3" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d8beb601-d38d-44a1-aafb-1c2931d53651" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_srt_RangeAxis_d8beb601-d38d-44a1-aafb-1c2931d53651" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d8beb601-d38d-44a1-aafb-1c2931d53651_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d8beb601-d38d-44a1-aafb-1c2931d53651" xlink:to="loc_srt_RangeMember_d8beb601-d38d-44a1-aafb-1c2931d53651_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_8fca2ca5-e382-4a32-9f92-691dbc41c969" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d8beb601-d38d-44a1-aafb-1c2931d53651" xlink:to="loc_srt_RangeMember_8fca2ca5-e382-4a32-9f92-691dbc41c969" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_24aae4f6-300c-44ed-b0d0-162beee58fcb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8fca2ca5-e382-4a32-9f92-691dbc41c969" xlink:to="loc_srt_MinimumMember_24aae4f6-300c-44ed-b0d0-162beee58fcb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_3e3ce456-bdee-4cbe-b586-879cbb733557" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_8fca2ca5-e382-4a32-9f92-691dbc41c969" xlink:to="loc_srt_MaximumMember_3e3ce456-bdee-4cbe-b586-879cbb733557" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_dei_LegalEntityAxis_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72" xlink:to="loc_dei_EntityDomain_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a2609191-fc99-4eba-a6e8-37a7109ef132" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b6956d61-dc9b-4cc1-914d-64c1fb7cbf72" xlink:to="loc_dei_EntityDomain_a2609191-fc99-4eba-a6e8-37a7109ef132" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_4310a0f0-6b05-4b68-ac94-0b0e44f47f12" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a2609191-fc99-4eba-a6e8-37a7109ef132" xlink:to="loc_aal_AmericanAirlinesIncMember_4310a0f0-6b05-4b68-ac94-0b0e44f47f12" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_2830aae5-df1d-4507-bf7e-3b25e2085baf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_srt_CounterpartyNameAxis_2830aae5-df1d-4507-bf7e-3b25e2085baf" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2830aae5-df1d-4507-bf7e-3b25e2085baf_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_2830aae5-df1d-4507-bf7e-3b25e2085baf" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2830aae5-df1d-4507-bf7e-3b25e2085baf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9e9b35e8-75bf-465c-869c-6bc8c02aeb18" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_2830aae5-df1d-4507-bf7e-3b25e2085baf" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9e9b35e8-75bf-465c-869c-6bc8c02aeb18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RepublicAirlineIncMember_fd4f32ea-7f32-4e11-a6ea-3515523c52c2" xlink:href="aal-20231231.xsd#aal_RepublicAirlineIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_9e9b35e8-75bf-465c-869c-6bc8c02aeb18" xlink:to="loc_aal_RepublicAirlineIncMember_fd4f32ea-7f32-4e11-a6ea-3515523c52c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f5a4871b-45cf-4934-88ca-cb39962bc3ff" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f5a4871b-45cf-4934-88ca-cb39962bc3ff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_f5a4871b-45cf-4934-88ca-cb39962bc3ff_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f5a4871b-45cf-4934-88ca-cb39962bc3ff" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_f5a4871b-45cf-4934-88ca-cb39962bc3ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_f594c003-000b-4054-8266-608e874eb4cf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f5a4871b-45cf-4934-88ca-cb39962bc3ff" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_f594c003-000b-4054-8266-608e874eb4cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RepublicAirwaysHoldingsInc.Member_0e8272b5-a2d0-42bc-afc1-170dce038913" xlink:href="aal-20231231.xsd#aal_RepublicAirwaysHoldingsInc.Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_f594c003-000b-4054-8266-608e874eb4cf" xlink:to="loc_aal_RepublicAirwaysHoldingsInc.Member_0e8272b5-a2d0-42bc-afc1-170dce038913" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeAxis_98ea293a-fe7f-47c9-937f-f8c3aa0fea10" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_srt_AircraftTypeAxis_98ea293a-fe7f-47c9-937f-f8c3aa0fea10" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeMember_98ea293a-fe7f-47c9-937f-f8c3aa0fea10_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_AircraftTypeAxis_98ea293a-fe7f-47c9-937f-f8c3aa0fea10" xlink:to="loc_srt_AircraftTypeMember_98ea293a-fe7f-47c9-937f-f8c3aa0fea10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_AircraftTypeAxis_98ea293a-fe7f-47c9-937f-f8c3aa0fea10" xlink:to="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LeasedAircraftMember_9d986d31-ed90-4a54-bbe3-98eb9edced8e" xlink:href="aal-20231231.xsd#aal_LeasedAircraftMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:to="loc_aal_LeasedAircraftMember_9d986d31-ed90-4a54-bbe3-98eb9edced8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LeasedAircraftInTemporaryStorageMember_2557d969-b38b-4aec-9450-9822d5b02c95" xlink:href="aal-20231231.xsd#aal_LeasedAircraftInTemporaryStorageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:to="loc_aal_LeasedAircraftInTemporaryStorageMember_2557d969-b38b-4aec-9450-9822d5b02c95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AircraftLeasedUnderCapacityPurchaseAgreementsMember_9a8641d5-7096-4a2d-94cb-db53ca2ede7c" xlink:href="aal-20231231.xsd#aal_AircraftLeasedUnderCapacityPurchaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:to="loc_aal_AircraftLeasedUnderCapacityPurchaseAgreementsMember_9a8641d5-7096-4a2d-94cb-db53ca2ede7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_Boeing787Member_7d996a19-00e7-4e69-98fd-93d813fadf97" xlink:href="aal-20231231.xsd#aal_Boeing787Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_AircraftTypeMember_3ae1a0fa-e83b-4598-b671-0d75555bf5d3" xlink:to="loc_aal_Boeing787Member_7d996a19-00e7-4e69-98fd-93d813fadf97" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_8e7f7ea7-822f-4513-b405-a70be6fd73b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_492dd8b6-5e04-43e7-8ccd-9ce4020b5fd4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_8e7f7ea7-822f-4513-b405-a70be6fd73b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_8e7f7ea7-822f-4513-b405-a70be6fd73b2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_8e7f7ea7-822f-4513-b405-a70be6fd73b2" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_8e7f7ea7-822f-4513-b405-a70be6fd73b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_9eb3e5e0-9442-4935-83fb-353334215b56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_8e7f7ea7-822f-4513-b405-a70be6fd73b2" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_9eb3e5e0-9442-4935-83fb-353334215b56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OperatingLeaseCommitmentsMember_ded382dd-8f22-4263-9e94-3eaf2f2f272e" xlink:href="aal-20231231.xsd#aal_OperatingLeaseCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_9eb3e5e0-9442-4935-83fb-353334215b56" xlink:to="loc_aal_OperatingLeaseCommitmentsMember_ded382dd-8f22-4263-9e94-3eaf2f2f272e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfAircraftOperated_c48b4dd1-6ece-4dc5-b542-99cc42e2af77" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfAircraftOperated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_NumberOfAircraftOperated_c48b4dd1-6ece-4dc5-b542-99cc42e2af77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LesseeOperatingAndFinanceLeaseTermOfContract_36a8c454-b850-4a52-80f9-2d7746b30813" xlink:href="aal-20231231.xsd#aal_LesseeOperatingAndFinanceLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_aal_LesseeOperatingAndFinanceLeaseTermOfContract_36a8c454-b850-4a52-80f9-2d7746b30813" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_8875c324-f86e-4a98-8801-8d6de5361377" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_OperatingLeaseCost_8875c324-f86e-4a98-8801-8d6de5361377" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_33bd4a45-f84c-438e-8333-af94c17f374f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_33bd4a45-f84c-438e-8333-af94c17f374f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_04db0fae-4970-4cf8-bb8c-ab1dc76d63c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount_04db0fae-4970-4cf8-bb8c-ab1dc76d63c9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LesseeOperatingLeaseLeaseNotyetCommencedNumberOfLeasedAircraft_88b45291-a342-4e38-8f5c-db6f84f15942" xlink:href="aal-20231231.xsd#aal_LesseeOperatingLeaseLeaseNotyetCommencedNumberOfLeasedAircraft"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_aal_LesseeOperatingLeaseLeaseNotyetCommencedNumberOfLeasedAircraft_88b45291-a342-4e38-8f5c-db6f84f15942" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1_0187f0ec-e966-47dc-b9b4-fbf9273dbb6e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_28a3ed35-4ffb-4405-8491-a7dcdc1d3672" xlink:to="loc_us-gaap_LesseeOperatingLeaseLeaseNotYetCommencedTermOfContract1_0187f0ec-e966-47dc-b9b4-fbf9273dbb6e" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesComponentsofLeaseExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesComponentsofLeaseExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_92a984be-91e5-46fe-98f6-22d3c7a98fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_92a984be-91e5-46fe-98f6-22d3c7a98fc5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_927294cf-512c-4e9c-a33a-e60cd1648f9e" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_92a984be-91e5-46fe-98f6-22d3c7a98fc5" xlink:to="loc_dei_LegalEntityAxis_927294cf-512c-4e9c-a33a-e60cd1648f9e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_927294cf-512c-4e9c-a33a-e60cd1648f9e_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_927294cf-512c-4e9c-a33a-e60cd1648f9e" xlink:to="loc_dei_EntityDomain_927294cf-512c-4e9c-a33a-e60cd1648f9e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_02019b14-fff0-423d-a12e-d76d79158bfe" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_927294cf-512c-4e9c-a33a-e60cd1648f9e" xlink:to="loc_dei_EntityDomain_02019b14-fff0-423d-a12e-d76d79158bfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_99dee013-181a-4958-bc42-e76caed04144" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_02019b14-fff0-423d-a12e-d76d79158bfe" xlink:to="loc_aal_AmericanAirlinesIncMember_99dee013-181a-4958-bc42-e76caed04144" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_456a0711-acef-438f-b0f2-18b6bd59b8be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:to="loc_us-gaap_OperatingLeaseCost_456a0711-acef-438f-b0f2-18b6bd59b8be" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_FinanceLeaseCost1Abstract_8ee60025-9ea0-4ce7-b4c3-aa09c6240c2b" xlink:href="aal-20231231.xsd#aal_FinanceLeaseCost1Abstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:to="loc_aal_FinanceLeaseCost1Abstract_8ee60025-9ea0-4ce7-b4c3-aa09c6240c2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_18be48b4-bb9c-4561-b68a-35a99adc1d3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseRightOfUseAssetAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseCost1Abstract_8ee60025-9ea0-4ce7-b4c3-aa09c6240c2b" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAmortization_18be48b4-bb9c-4561-b68a-35a99adc1d3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestExpense_e57dabcf-d029-4d6e-9da8-ff405e587f59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseCost1Abstract_8ee60025-9ea0-4ce7-b4c3-aa09c6240c2b" xlink:to="loc_us-gaap_FinanceLeaseInterestExpense_e57dabcf-d029-4d6e-9da8-ff405e587f59" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableLeaseCost_e8d1ff27-9874-4802-ba82-fa616401e8dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:to="loc_us-gaap_VariableLeaseCost_e8d1ff27-9874-4802-ba82-fa616401e8dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseCost_27d7834b-1dac-4d76-a854-cf02ea3fe8a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_117d7d0a-6662-4fba-adab-e501273346dc" xlink:to="loc_us-gaap_LeaseCost_27d7834b-1dac-4d76-a854-cf02ea3fe8a1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesSupplementalBalanceSheetInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesSupplementalBalanceSheetInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesSupplementalBalanceSheetInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_a3ec614e-e103-4bfc-b6bd-95dfb58a08dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_a3ec614e-e103-4bfc-b6bd-95dfb58a08dd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_0db028fa-6c5d-4915-80ec-37521b6ebb5d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_a3ec614e-e103-4bfc-b6bd-95dfb58a08dd" xlink:to="loc_dei_LegalEntityAxis_0db028fa-6c5d-4915-80ec-37521b6ebb5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0db028fa-6c5d-4915-80ec-37521b6ebb5d_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0db028fa-6c5d-4915-80ec-37521b6ebb5d" xlink:to="loc_dei_EntityDomain_0db028fa-6c5d-4915-80ec-37521b6ebb5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a3e3f1f0-3319-49e1-ad71-f80f7501977b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0db028fa-6c5d-4915-80ec-37521b6ebb5d" xlink:to="loc_dei_EntityDomain_a3e3f1f0-3319-49e1-ad71-f80f7501977b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_8357f960-5d04-469a-a5eb-c85d8f91ff35" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a3e3f1f0-3319-49e1-ad71-f80f7501977b" xlink:to="loc_aal_AmericanAirlinesIncMember_8357f960-5d04-469a-a5eb-c85d8f91ff35" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:href="aal-20231231.xsd#aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_3aca7d43-f710-4893-beb3-6f6225097483" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_3aca7d43-f710-4893-beb3-6f6225097483" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_2efd1fad-1e3e-4bd1-a2bc-82696e8332ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_2efd1fad-1e3e-4bd1-a2bc-82696e8332ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_68e8773c-5d6a-4570-b9b7-63fa7a8808e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_68e8773c-5d6a-4570-b9b7-63fa7a8808e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_c7408fd2-c4fe-445e-8f38-bc2fbd95db98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OperatingLeaseAssetsAndLiabilitiesLesseeAbstract_6467ec4a-3b95-445f-8488-5b06bbb2d35e" xlink:to="loc_us-gaap_OperatingLeaseLiability_c7408fd2-c4fe-445e-8f38-bc2fbd95db98" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:href="aal-20231231.xsd#aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_7f6c3ad4-fc12-4f9a-ae2b-1be578c24fff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetBeforeAccumulatedAmortization_7f6c3ad4-fc12-4f9a-ae2b-1be578c24fff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_b91b6023-a7ac-4233-a2f1-922cfd0bdb31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetAccumulatedAmortization_b91b6023-a7ac-4233-a2f1-922cfd0bdb31" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_3c02a5a5-0b8b-4b3b-84eb-8028bec45eed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_3c02a5a5-0b8b-4b3b-84eb-8028bec45eed" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_e7deaa3a-7315-4c08-99d9-ec23928ceef7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_e7deaa3a-7315-4c08-99d9-ec23928ceef7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_4cdedb66-265b-4a3d-884b-c116386e832a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_4cdedb66-265b-4a3d-884b-c116386e832a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_bed2d3c4-e770-45d2-9e3d-9bc24bb83802" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_FinanceLeaseAssetsAndLiabilitiesLesseeAbstract_1696b4ae-67ca-49be-88a7-0525482aa969" xlink:to="loc_us-gaap_FinanceLeaseLiability_bed2d3c4-e770-45d2-9e3d-9bc24bb83802" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_WeightedAverageRemainingLeaseTermAbstract_a3147392-5d51-428a-abde-5420c67e8e8d" xlink:href="aal-20231231.xsd#aal_WeightedAverageRemainingLeaseTermAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_aal_WeightedAverageRemainingLeaseTermAbstract_a3147392-5d51-428a-abde-5420c67e8e8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_616e944c-78c5-43af-aeb0-d298a1e1e8da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_WeightedAverageRemainingLeaseTermAbstract_a3147392-5d51-428a-abde-5420c67e8e8d" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_616e944c-78c5-43af-aeb0-d298a1e1e8da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_11a20b8b-bb45-4cc0-bab3-2ac35e95016e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_WeightedAverageRemainingLeaseTermAbstract_a3147392-5d51-428a-abde-5420c67e8e8d" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_11a20b8b-bb45-4cc0-bab3-2ac35e95016e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LeasesWeightedAverageDiscountRateAbstract_8466f687-7b07-430c-8755-009531c4ec36" xlink:href="aal-20231231.xsd#aal_LeasesWeightedAverageDiscountRateAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_aal_LeasesWeightedAverageDiscountRateAbstract_8466f687-7b07-430c-8755-009531c4ec36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_c9e6ccfd-ec45-4311-937e-c90ccad27c49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_LeasesWeightedAverageDiscountRateAbstract_8466f687-7b07-430c-8755-009531c4ec36" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_c9e6ccfd-ec45-4311-937e-c90ccad27c49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_e6221bd8-1151-4abb-9375-7aeed59c0c81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_LeasesWeightedAverageDiscountRateAbstract_8466f687-7b07-430c-8755-009531c4ec36" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_e6221bd8-1151-4abb-9375-7aeed59c0c81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_b5d0be8c-0334-4a90-8841-b4dd42307f99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList_b5d0be8c-0334-4a90-8841-b4dd42307f99" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_63bda429-e73b-4eac-b7f6-b3acc05ff375" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList_63bda429-e73b-4eac-b7f6-b3acc05ff375" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_f6827c83-db34-4971-b299-f3adbc7d1520" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ef14a93c-b984-48cb-a2af-ba555b588571" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList_f6827c83-db34-4971-b299-f3adbc7d1520" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesSupplementalCashFlowandOtherInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesSupplementalCashFlowandOtherInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesSupplementalCashFlowandOtherInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_ee2b77b0-aff8-418e-b761-2135666fc5c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_ec9948ca-039c-48de-a6a8-2f3acf6ed91a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ee2b77b0-aff8-418e-b761-2135666fc5c0" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_ec9948ca-039c-48de-a6a8-2f3acf6ed91a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_36d58bec-0493-44f3-9501-55e1b31d83ba" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_ec9948ca-039c-48de-a6a8-2f3acf6ed91a" xlink:to="loc_dei_LegalEntityAxis_36d58bec-0493-44f3-9501-55e1b31d83ba" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_36d58bec-0493-44f3-9501-55e1b31d83ba_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_36d58bec-0493-44f3-9501-55e1b31d83ba" xlink:to="loc_dei_EntityDomain_36d58bec-0493-44f3-9501-55e1b31d83ba_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_210a6f95-fe68-41c7-ad31-8f618c04967d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_36d58bec-0493-44f3-9501-55e1b31d83ba" xlink:to="loc_dei_EntityDomain_210a6f95-fe68-41c7-ad31-8f618c04967d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_549087fd-d232-491d-b785-91dc83d8a20a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_210a6f95-fe68-41c7-ad31-8f618c04967d" xlink:to="loc_aal_AmericanAirlinesIncMember_549087fd-d232-491d-b785-91dc83d8a20a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CashFlowLesseeAbstract_817334f5-de4f-48ac-ad15-e21ce30cfef8" xlink:href="aal-20231231.xsd#aal_CashFlowLesseeAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ee2b77b0-aff8-418e-b761-2135666fc5c0" xlink:to="loc_aal_CashFlowLesseeAbstract_817334f5-de4f-48ac-ad15-e21ce30cfef8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_e5c508eb-85a2-451e-8932-646c5b97d56b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeasePayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CashFlowLesseeAbstract_817334f5-de4f-48ac-ad15-e21ce30cfef8" xlink:to="loc_us-gaap_OperatingLeasePayments_e5c508eb-85a2-451e-8932-646c5b97d56b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseInterestPaymentOnLiability_9aaa8388-a5a9-4844-bc34-5d46b811864a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseInterestPaymentOnLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CashFlowLesseeAbstract_817334f5-de4f-48ac-ad15-e21ce30cfef8" xlink:to="loc_us-gaap_FinanceLeaseInterestPaymentOnLiability_9aaa8388-a5a9-4844-bc34-5d46b811864a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeasePrincipalPayments_bac895a0-ab57-419d-83e6-8d55c39dae8c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeasePrincipalPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CashFlowLesseeAbstract_817334f5-de4f-48ac-ad15-e21ce30cfef8" xlink:to="loc_us-gaap_FinanceLeasePrincipalPayments_bac895a0-ab57-419d-83e6-8d55c39dae8c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_ac9693f6-76c0-4305-9365-10ae31bab973" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SaleAndLeasebackTransactionGainLossNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ee2b77b0-aff8-418e-b761-2135666fc5c0" xlink:to="loc_us-gaap_SaleAndLeasebackTransactionGainLossNet_ac9693f6-76c0-4305-9365-10ae31bab973" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#LeasesMaturitiesofLeaseLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/LeasesMaturitiesofLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_ab267072-8012-461f-b1c0-168ac279c8c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_b770340d-e628-4540-8ea2-039cfdb8257c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeLeaseDescriptionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ab267072-8012-461f-b1c0-168ac279c8c9" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_b770340d-e628-4540-8ea2-039cfdb8257c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_40d5318f-d5e7-4654-af15-4a38e8736209" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_b770340d-e628-4540-8ea2-039cfdb8257c" xlink:to="loc_dei_LegalEntityAxis_40d5318f-d5e7-4654-af15-4a38e8736209" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_40d5318f-d5e7-4654-af15-4a38e8736209_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_40d5318f-d5e7-4654-af15-4a38e8736209" xlink:to="loc_dei_EntityDomain_40d5318f-d5e7-4654-af15-4a38e8736209_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d5296d37-ae83-4a09-b040-b0cb884f7b61" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_40d5318f-d5e7-4654-af15-4a38e8736209" xlink:to="loc_dei_EntityDomain_d5296d37-ae83-4a09-b040-b0cb884f7b61" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_aa5665bc-17da-403b-a825-57e8df6f22a3" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d5296d37-ae83-4a09-b040-b0cb884f7b61" xlink:to="loc_aal_AmericanAirlinesIncMember_aa5665bc-17da-403b-a825-57e8df6f22a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ab267072-8012-461f-b1c0-168ac279c8c9" xlink:to="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f71d3ba5-f197-4724-a46a-cbc7a5fc20d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_f71d3ba5-f197-4724-a46a-cbc7a5fc20d6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_c6d85fb9-9ae3-4e8d-aa62-c712e534ae68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_c6d85fb9-9ae3-4e8d-aa62-c712e534ae68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_53b3dfc9-adab-421f-a37a-a0b2033f5557" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_53b3dfc9-adab-421f-a37a-a0b2033f5557" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_b055bf39-04b0-45ef-9d9d-e9def341ebfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_b055bf39-04b0-45ef-9d9d-e9def341ebfa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_f5bb328d-20b4-4bfd-a3f9-464fc99b1901" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_f5bb328d-20b4-4bfd-a3f9-464fc99b1901" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_f94c33e1-4546-4f56-9e9c-cda9e463e2b5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_f94c33e1-4546-4f56-9e9c-cda9e463e2b5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_00621f44-486a-41ad-9e62-b4caea8a2280" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_00621f44-486a-41ad-9e62-b4caea8a2280" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_342af0f9-3f05-4617-9d58-79406730e971" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_342af0f9-3f05-4617-9d58-79406730e971" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_f55b45d6-7417-467f-b632-2f688e5ba198" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_OperatingLeaseLiability_f55b45d6-7417-467f-b632-2f688e5ba198" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_3ba6624c-d975-4b41-a25e-0b0342f922d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_3ba6624c-d975-4b41-a25e-0b0342f922d0" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_53ba7410-208a-4634-8aeb-fc5d3e0e1866" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeaseLiabilitiesPaymentsDueAbstract_5bd97ddf-d3ec-48b2-8ea9-b1d1b2cfe216" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_53ba7410-208a-4634-8aeb-fc5d3e0e1866" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_ab267072-8012-461f-b1c0-168ac279c8c9" xlink:to="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_a08c2d1b-ed62-480a-84af-0993e224abad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueNextTwelveMonths_a08c2d1b-ed62-480a-84af-0993e224abad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_b5e083cd-1170-4ff2-bdc9-c5ccbf16a067" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_b5e083cd-1170-4ff2-bdc9-c5ccbf16a067" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_9cf8c9f7-c933-4ca6-87ae-77e82d198c99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_9cf8c9f7-c933-4ca6-87ae-77e82d198c99" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_ac75a46d-ad52-44d9-ad1a-90193ee86aa7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_ac75a46d-ad52-44d9-ad1a-90193ee86aa7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_c50c636c-a4fe-4fea-b5d3-3e087dd90bb2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_c50c636c-a4fe-4fea-b5d3-3e087dd90bb2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_8194e960-7224-439b-8f7c-6df9327e0e06" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_8194e960-7224-439b-8f7c-6df9327e0e06" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_b954d1ce-bde5-463e-ba44-25a785c275fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_b954d1ce-bde5-463e-ba44-25a785c275fd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_a60e138f-f2ae-4401-bec2-6026f2d53143" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_a60e138f-f2ae-4401-bec2-6026f2d53143" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_8cb8c82f-3b58-4201-92a5-f19f47930f82" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiability_8cb8c82f-3b58-4201-92a5-f19f47930f82" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_19cfffcc-2928-4eec-be9e-925c27bc70d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_19cfffcc-2928-4eec-be9e-925c27bc70d5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_011c3c71-40fe-4960-84a8-762f9facd2b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinanceLeaseLiabilitiesPaymentsDueAbstract_67c368bd-5d24-409b-ae77-e26a9ff21815" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_011c3c71-40fe-4960-84a8-762f9facd2b2" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesComponentsofIncomeTaxProvisionBenefitDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxesComponentsofIncomeTaxProvisionBenefitDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesComponentsofIncomeTaxProvisionBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_ComponentsOfIncomeTaxesLineItems_d0eff6b5-d9df-42ab-902d-efb0b58f8129" xlink:href="aal-20231231.xsd#aal_ComponentsOfIncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ComponentsOfIncomeTaxesTable_5303a2c1-ce83-44d6-a113-d18672a9d658" xlink:href="aal-20231231.xsd#aal_ComponentsOfIncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_d0eff6b5-d9df-42ab-902d-efb0b58f8129" xlink:to="loc_aal_ComponentsOfIncomeTaxesTable_5303a2c1-ce83-44d6-a113-d18672a9d658" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_a895524e-075b-4c80-b3fc-97dccca7615c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_ComponentsOfIncomeTaxesTable_5303a2c1-ce83-44d6-a113-d18672a9d658" xlink:to="loc_dei_LegalEntityAxis_a895524e-075b-4c80-b3fc-97dccca7615c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a895524e-075b-4c80-b3fc-97dccca7615c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_a895524e-075b-4c80-b3fc-97dccca7615c" xlink:to="loc_dei_EntityDomain_a895524e-075b-4c80-b3fc-97dccca7615c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_32dad038-4da4-4f06-b922-ac12eb094ae5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_a895524e-075b-4c80-b3fc-97dccca7615c" xlink:to="loc_dei_EntityDomain_32dad038-4da4-4f06-b922-ac12eb094ae5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_49eca3a0-d2ba-4309-8237-5344361d7ab6" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_32dad038-4da4-4f06-b922-ac12eb094ae5" xlink:to="loc_aal_AmericanAirlinesIncMember_49eca3a0-d2ba-4309-8237-5344361d7ab6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_9ac9cd8c-f8eb-43e7-a961-e64a7441cd7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_d0eff6b5-d9df-42ab-902d-efb0b58f8129" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_9ac9cd8c-f8eb-43e7-a961-e64a7441cd7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_35c25541-843c-4e32-9867-c04e8bb14817" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_9ac9cd8c-f8eb-43e7-a961-e64a7441cd7b" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_35c25541-843c-4e32-9867-c04e8bb14817" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_e0f865af-7516-4666-af29-8e64219d4b59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_d0eff6b5-d9df-42ab-902d-efb0b58f8129" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_e0f865af-7516-4666-af29-8e64219d4b59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_70f91881-3ace-4778-bc97-eacfc4defa60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_e0f865af-7516-4666-af29-8e64219d4b59" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_70f91881-3ace-4778-bc97-eacfc4defa60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_2b8d35c8-21a5-4e77-9d74-4f6009f0356a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_e0f865af-7516-4666-af29-8e64219d4b59" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_2b8d35c8-21a5-4e77-9d74-4f6009f0356a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_c75ac6cc-7780-4663-a7af-e781b3e363ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_e0f865af-7516-4666-af29-8e64219d4b59" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_c75ac6cc-7780-4663-a7af-e781b3e363ca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_9d061e8b-fac2-443d-b4ed-ca6e45c4a471" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_d0eff6b5-d9df-42ab-902d-efb0b58f8129" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_9d061e8b-fac2-443d-b4ed-ca6e45c4a471" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesReconciliationofIncomeTaxProvisionDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxesReconciliationofIncomeTaxProvisionDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesReconciliationofIncomeTaxProvisionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:href="aal-20231231.xsd#aal_IncomeTaxDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ComponentsOfIncomeTaxesTable_fdb61935-0df2-4ae9-b7a8-a840d1aaf8c5" xlink:href="aal-20231231.xsd#aal_ComponentsOfIncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_aal_ComponentsOfIncomeTaxesTable_fdb61935-0df2-4ae9-b7a8-a840d1aaf8c5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_22f5021e-79b2-4664-8b76-d771470c7296" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_ComponentsOfIncomeTaxesTable_fdb61935-0df2-4ae9-b7a8-a840d1aaf8c5" xlink:to="loc_dei_LegalEntityAxis_22f5021e-79b2-4664-8b76-d771470c7296" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_22f5021e-79b2-4664-8b76-d771470c7296_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_22f5021e-79b2-4664-8b76-d771470c7296" xlink:to="loc_dei_EntityDomain_22f5021e-79b2-4664-8b76-d771470c7296_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ef393148-0a5c-41a6-ab9f-27332aae0001" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_22f5021e-79b2-4664-8b76-d771470c7296" xlink:to="loc_dei_EntityDomain_ef393148-0a5c-41a6-ab9f-27332aae0001" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_8af6444c-eb0e-4e69-ad89-c74847ce9ad0" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ef393148-0a5c-41a6-ab9f-27332aae0001" xlink:to="loc_aal_AmericanAirlinesIncMember_8af6444c-eb0e-4e69-ad89-c74847ce9ad0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_b1446720-36f8-4657-bb1c-6796c4de6a87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_b1446720-36f8-4657-bb1c-6796c4de6a87" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_EffectiveIncomeTaxRateReconciliationStateLocalAndForeignIncomeTaxesAmount_be8da983-9b8e-4a1e-adda-cb48e1d91bc8" xlink:href="aal-20231231.xsd#aal_EffectiveIncomeTaxRateReconciliationStateLocalAndForeignIncomeTaxesAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_aal_EffectiveIncomeTaxRateReconciliationStateLocalAndForeignIncomeTaxesAmount_be8da983-9b8e-4a1e-adda-cb48e1d91bc8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_24c99dba-3c03-4728-9599-a8c3cac1a721" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_24c99dba-3c03-4728-9599-a8c3cac1a721" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_0a205253-2ca9-4b28-a876-2537b70eaa50" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_0a205253-2ca9-4b28-a876-2537b70eaa50" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_d8c6e804-b0a3-484e-9741-4692e004b2c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_d8c6e804-b0a3-484e-9741-4692e004b2c1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_62428eb8-ee63-41a7-8726-ac5fd6de48c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_084d08a2-1edd-4b4f-af3e-cb2fc4ef6e4e" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_62428eb8-ee63-41a7-8726-ac5fd6de48c9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_042a7b3f-0639-4707-916a-bd4c19bf2c24" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwardsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_04d8e6b9-3a97-4fe2-b7c8-a83a08f92d15" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwardsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_042a7b3f-0639-4707-916a-bd4c19bf2c24" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_04d8e6b9-3a97-4fe2-b7c8-a83a08f92d15" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_dfbb2fe7-c4bb-44bb-83ce-8266987a1812" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_04d8e6b9-3a97-4fe2-b7c8-a83a08f92d15" xlink:to="loc_dei_LegalEntityAxis_dfbb2fe7-c4bb-44bb-83ce-8266987a1812" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_dfbb2fe7-c4bb-44bb-83ce-8266987a1812_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_dfbb2fe7-c4bb-44bb-83ce-8266987a1812" xlink:to="loc_dei_EntityDomain_dfbb2fe7-c4bb-44bb-83ce-8266987a1812_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_57f4a7f1-2c58-4876-a32e-e3985b564f40" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_dfbb2fe7-c4bb-44bb-83ce-8266987a1812" xlink:to="loc_dei_EntityDomain_57f4a7f1-2c58-4876-a32e-e3985b564f40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_26b14809-40a1-448b-bdf6-501123191d3f" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_57f4a7f1-2c58-4876-a32e-e3985b564f40" xlink:to="loc_aal_AmericanAirlinesIncMember_26b14809-40a1-448b-bdf6-501123191d3f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_042a7b3f-0639-4707-916a-bd4c19bf2c24" xlink:to="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DeferredTaxAssetsOperatingLossCarryforwardsAndOtherCarryforwards_e2526b55-b651-4308-9a81-c7dbaa885ff4" xlink:href="aal-20231231.xsd#aal_DeferredTaxAssetsOperatingLossCarryforwardsAndOtherCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_aal_DeferredTaxAssetsOperatingLossCarryforwardsAndOtherCarryforwards_e2526b55-b651-4308-9a81-c7dbaa885ff4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsFrequentFlierLiability_d80bb53f-940c-4265-8673-d0da9b14bd9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsFrequentFlierLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsFrequentFlierLiability_d80bb53f-940c-4265-8673-d0da9b14bd9b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DeferredTaxAssetsLeases_9a0b150c-53fd-4518-af6e-91d2a2bed8bd" xlink:href="aal-20231231.xsd#aal_DeferredTaxAssetsLeases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_aal_DeferredTaxAssetsLeases_9a0b150c-53fd-4518-af6e-91d2a2bed8bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_30ef64b5-3869-47e2-889a-742d050fab39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_30ef64b5-3869-47e2-889a-742d050fab39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_103353ff-c3de-42e5-b32c-b4433fdbb88b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_103353ff-c3de-42e5-b32c-b4433fdbb88b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_4ef303f0-3343-49ae-916a-be858cb05db0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_4ef303f0-3343-49ae-916a-be858cb05db0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_86292faf-bf3e-4aeb-8cc2-475730daacf6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_86292faf-bf3e-4aeb-8cc2-475730daacf6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_fd31f5d9-2433-4a50-b18b-9ae73aa419a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_fd31f5d9-2433-4a50-b18b-9ae73aa419a2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_685000b5-2c71-4375-be19-9aec8ea7c550" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_685000b5-2c71-4375-be19-9aec8ea7c550" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_25a55351-bceb-446a-97e2-ec6801e4ce1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_882be6fe-a7ef-4e98-afe5-2c6fac1c85aa" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_25a55351-bceb-446a-97e2-ec6801e4ce1e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_042a7b3f-0639-4707-916a-bd4c19bf2c24" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization_aca892de-cc0f-41f2-a595-6e686b76a6f8" xlink:href="aal-20231231.xsd#aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:to="loc_aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization_aca892de-cc0f-41f2-a595-6e686b76a6f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_f71e9e00-cf18-4147-9065-b94cd935b610" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_f71e9e00-cf18-4147-9065-b94cd935b610" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_6ce86533-e2ba-4285-bd03-5bfd02e93a13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_6ce86533-e2ba-4285-bd03-5bfd02e93a13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_ba34b994-d09c-4a12-b00e-2ef29a44befd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_718c5954-1f8a-410c-9669-ade527657902" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_ba34b994-d09c-4a12-b00e-2ef29a44befd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_f849b30b-71fc-4a58-908a-1cabd05f9ed3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_042a7b3f-0639-4707-916a-bd4c19bf2c24" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_f849b30b-71fc-4a58-908a-1cabd05f9ed3" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesAdditionalDisclosuresDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#IncomeTaxesAdditionalDisclosuresDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesAdditionalDisclosuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:href="aal-20231231.xsd#aal_IncomeTaxesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_IncomeTaxesTable_219fbe8e-c9a5-49f2-83b3-dc8cebf4a9b9" xlink:href="aal-20231231.xsd#aal_IncomeTaxesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_aal_IncomeTaxesTable_219fbe8e-c9a5-49f2-83b3-dc8cebf4a9b9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_af434ce6-5423-49ba-8fe7-37c111c0cb9c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_219fbe8e-c9a5-49f2-83b3-dc8cebf4a9b9" xlink:to="loc_dei_LegalEntityAxis_af434ce6-5423-49ba-8fe7-37c111c0cb9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_af434ce6-5423-49ba-8fe7-37c111c0cb9c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_af434ce6-5423-49ba-8fe7-37c111c0cb9c" xlink:to="loc_dei_EntityDomain_af434ce6-5423-49ba-8fe7-37c111c0cb9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_bdd95d98-2746-40f6-b827-a7db7037cfd5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_af434ce6-5423-49ba-8fe7-37c111c0cb9c" xlink:to="loc_dei_EntityDomain_bdd95d98-2746-40f6-b827-a7db7037cfd5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_ea807c40-07a0-4771-afee-5b56f549e70a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_bdd95d98-2746-40f6-b827-a7db7037cfd5" xlink:to="loc_aal_AmericanAirlinesIncMember_ea807c40-07a0-4771-afee-5b56f549e70a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_3a6810a5-903b-480a-b817-e9de6a800ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxAuthorityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_219fbe8e-c9a5-49f2-83b3-dc8cebf4a9b9" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_3a6810a5-903b-480a-b817-e9de6a800ff0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_3a6810a5-903b-480a-b817-e9de6a800ff0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3a6810a5-903b-480a-b817-e9de6a800ff0" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_3a6810a5-903b-480a-b817-e9de6a800ff0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_5675fe76-6f09-4c5f-b331-c93ef69b5dfe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxAuthorityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_3a6810a5-903b-480a-b817-e9de6a800ff0" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_5675fe76-6f09-4c5f-b331-c93ef69b5dfe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_105e40b2-cd98-40dc-9984-343ad0bab0a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DomesticCountryMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_5675fe76-6f09-4c5f-b331-c93ef69b5dfe" xlink:to="loc_us-gaap_DomesticCountryMember_105e40b2-cd98-40dc-9984-343ad0bab0a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_1a33c274-e6ee-4eb8-b876-00c8eabf8a60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StateAndLocalJurisdictionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_5675fe76-6f09-4c5f-b331-c93ef69b5dfe" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_1a33c274-e6ee-4eb8-b876-00c8eabf8a60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_b0e85f76-ea6d-463a-9e03-9d64368f5a18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_us-gaap_OperatingLossCarryforwards_b0e85f76-ea6d-463a-9e03-9d64368f5a18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OtherCarryforwards_25f1578a-6902-4e69-bc71-4c4efa816daa" xlink:href="aal-20231231.xsd#aal_OtherCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_aal_OtherCarryforwards_25f1578a-6902-4e69-bc71-4c4efa816daa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OperatingLossCarryforwardsAndOtherCarryforwardsSubjectToExpiration_c1f17465-bca1-49a9-923e-bc1862d8853e" xlink:href="aal-20231231.xsd#aal_OperatingLossCarryforwardsAndOtherCarryforwardsSubjectToExpiration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_aal_OperatingLossCarryforwardsAndOtherCarryforwardsSubjectToExpiration_c1f17465-bca1-49a9-923e-bc1862d8853e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OperatingLossCarryforwardsAndOtherCarryforwardsNotSubjectToExpiration_e7350bdd-be9d-4671-aecd-b34d24b2254c" xlink:href="aal-20231231.xsd#aal_OperatingLossCarryforwardsAndOtherCarryforwardsNotSubjectToExpiration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_aal_OperatingLossCarryforwardsAndOtherCarryforwardsNotSubjectToExpiration_e7350bdd-be9d-4671-aecd-b34d24b2254c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_e309c07f-95a9-4cd4-9f01-a5b83ee10269" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_e309c07f-95a9-4cd4-9f01-a5b83ee10269" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_0ef742f8-8897-4290-9573-7141e829c026" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_9dde72ef-7eae-4d15-aee5-9fc5ee56dc31" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_0ef742f8-8897-4290-9573-7141e829c026" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsSummaryofAssetsMeasuredatFairValueonRecurringBasisDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#FairValueMeasurementsSummaryofAssetsMeasuredatFairValueonRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsSummaryofAssetsMeasuredatFairValueonRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_ed7641ed-71d8-4107-a881-7665f5031d7a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:to="loc_dei_LegalEntityAxis_ed7641ed-71d8-4107-a881-7665f5031d7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ed7641ed-71d8-4107-a881-7665f5031d7a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_ed7641ed-71d8-4107-a881-7665f5031d7a" xlink:to="loc_dei_EntityDomain_ed7641ed-71d8-4107-a881-7665f5031d7a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7036645b-476e-4eed-b770-6cb1612e0f6b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_ed7641ed-71d8-4107-a881-7665f5031d7a" xlink:to="loc_dei_EntityDomain_7036645b-476e-4eed-b770-6cb1612e0f6b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_29d3e222-fc13-4290-8859-bd31eb6be1f1" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7036645b-476e-4eed-b770-6cb1612e0f6b" xlink:to="loc_aal_AmericanAirlinesIncMember_29d3e222-fc13-4290-8859-bd31eb6be1f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0cc286cf-51e5-4789-bb86-5e1300de9362" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0cc286cf-51e5-4789-bb86-5e1300de9362" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_0cc286cf-51e5-4789-bb86-5e1300de9362_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0cc286cf-51e5-4789-bb86-5e1300de9362" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_0cc286cf-51e5-4789-bb86-5e1300de9362_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_94d5dec8-d3de-42f3-9835-ece60ecce967" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0cc286cf-51e5-4789-bb86-5e1300de9362" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_94d5dec8-d3de-42f3-9835-ece60ecce967" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_b17bd06d-403d-45ba-9d7e-4adc11d03cc0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_94d5dec8-d3de-42f3-9835-ece60ecce967" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_b17bd06d-403d-45ba-9d7e-4adc11d03cc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d3aa5a5f-7267-43e3-8b5e-fa8869035fb9" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MoneyMarketFundsMember_a2b73305-ea00-4433-a3e7-fa60cdf13241" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MoneyMarketFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:to="loc_us-gaap_MoneyMarketFundsMember_a2b73305-ea00-4433-a3e7-fa60cdf13241" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_e8faa179-7801-4e07-9312-b6cb9458529d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_e8faa179-7801-4e07-9312-b6cb9458529d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BankTimeDepositsMember_23897208-a157-4672-855a-e95b0bf90f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BankTimeDepositsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:to="loc_us-gaap_BankTimeDepositsMember_23897208-a157-4672-855a-e95b0bf90f7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepurchaseAgreementsMember_5f5b40f8-9a9c-4b34-9b95-529ac17a8237" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepurchaseAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:to="loc_us-gaap_RepurchaseAgreementsMember_5f5b40f8-9a9c-4b34-9b95-529ac17a8237" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USTreasuryAndGovernmentMember_e8457694-b921-4b2d-9c04-6f6b7e646e63" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USTreasuryAndGovernmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_155774ec-d91c-4da5-ad56-8c5609e680ed" xlink:to="loc_us-gaap_USTreasuryAndGovernmentMember_e8457694-b921-4b2d-9c04-6f6b7e646e63" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1c05b8e7-3ed3-4598-bc92-9861ee11be79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_55d3f173-7ddd-451f-840c-a5c6f88b7f2e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1c05b8e7-3ed3-4598-bc92-9861ee11be79" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1c05b8e7-3ed3-4598-bc92-9861ee11be79_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1c05b8e7-3ed3-4598-bc92-9861ee11be79" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_1c05b8e7-3ed3-4598-bc92-9861ee11be79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a5e955ef-d2aa-4e9f-958c-f640715b5997" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_1c05b8e7-3ed3-4598-bc92-9861ee11be79" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a5e955ef-d2aa-4e9f-958c-f640715b5997" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_7a948916-427c-481c-abc4-7988c63af840" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a5e955ef-d2aa-4e9f-958c-f640715b5997" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_7a948916-427c-481c-abc4-7988c63af840" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_803b5fd2-95c1-4c14-a810-37e2743f08e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a5e955ef-d2aa-4e9f-958c-f640715b5997" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_803b5fd2-95c1-4c14-a810-37e2743f08e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_f1524b2a-5b19-4e79-b229-c53a2650f631" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_a5e955ef-d2aa-4e9f-958c-f640715b5997" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_f1524b2a-5b19-4e79-b229-c53a2650f631" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_72f3811b-c4ee-4ad2-9c47-4430c36d3d36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecuritiesCurrent_72f3811b-c4ee-4ad2-9c47-4430c36d3d36" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure_f3a73607-3815-4a4f-8c2b-2fcc46a2d647" xlink:href="aal-20231231.xsd#aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure_f3a73607-3815-4a4f-8c2b-2fcc46a2d647" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFVNINoncurrent_37e245aa-055f-475a-a760-363ca080d03a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFVNINoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_us-gaap_EquitySecuritiesFVNINoncurrent_37e245aa-055f-475a-a760-363ca080d03a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_088c224f-3a54-4a13-a49c-8aee62a2e7c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_088c224f-3a54-4a13-a49c-8aee62a2e7c2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestrictedShortTermInvestmentsNoncurrent_1aa84608-da4a-4cce-bb43-a19a7db60412" xlink:href="aal-20231231.xsd#aal_RestrictedShortTermInvestmentsNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_1ad6cbd0-bcfb-4f31-86f3-381cd7b578be" xlink:to="loc_aal_RestrictedShortTermInvestmentsNoncurrent_1aa84608-da4a-4cce-bb43-a19a7db60412" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#FairValueMeasurementsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_cb23d042-2d1b-4a01-92dd-ad9a56bbf0c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9852fe8f-103f-48e1-bdc2-1bbe302e5ea7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_cb23d042-2d1b-4a01-92dd-ad9a56bbf0c1" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9852fe8f-103f-48e1-bdc2-1bbe302e5ea7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_446f7005-ac61-4654-aa86-4b7967a99038" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9852fe8f-103f-48e1-bdc2-1bbe302e5ea7" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_446f7005-ac61-4654-aa86-4b7967a99038" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_446f7005-ac61-4654-aa86-4b7967a99038_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_446f7005-ac61-4654-aa86-4b7967a99038" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_446f7005-ac61-4654-aa86-4b7967a99038_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7da5e89e-1be8-45f4-945a-6be748d11c44" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_446f7005-ac61-4654-aa86-4b7967a99038" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7da5e89e-1be8-45f4-945a-6be748d11c44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_4f83c0d5-0d6a-4222-a12f-c052929fe39a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_7da5e89e-1be8-45f4-945a-6be748d11c44" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_4f83c0d5-0d6a-4222-a12f-c052929fe39a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_22ba165d-ec85-4a9d-ac42-398b9bfe934d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9852fe8f-103f-48e1-bdc2-1bbe302e5ea7" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_22ba165d-ec85-4a9d-ac42-398b9bfe934d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_22ba165d-ec85-4a9d-ac42-398b9bfe934d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_22ba165d-ec85-4a9d-ac42-398b9bfe934d" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_22ba165d-ec85-4a9d-ac42-398b9bfe934d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a58deacb-81b6-4c12-b58c-5f122c10beaf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_22ba165d-ec85-4a9d-ac42-398b9bfe934d" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a58deacb-81b6-4c12-b58c-5f122c10beaf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_3df6980f-45f2-4fec-a79e-3a937fc42dba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_a58deacb-81b6-4c12-b58c-5f122c10beaf" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_3df6980f-45f2-4fec-a79e-3a937fc42dba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_3a1e3dca-ccb2-41c5-a177-3d7e63626901" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_3df6980f-45f2-4fec-a79e-3a937fc42dba" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_3a1e3dca-ccb2-41c5-a177-3d7e63626901" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_f817ffa4-76ce-41a5-878b-b1d33b8d3335" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_9852fe8f-103f-48e1-bdc2-1bbe302e5ea7" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_f817ffa4-76ce-41a5-878b-b1d33b8d3335" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_f817ffa4-76ce-41a5-878b-b1d33b8d3335_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f817ffa4-76ce-41a5-878b-b1d33b8d3335" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_f817ffa4-76ce-41a5-878b-b1d33b8d3335_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5ce7e55d-cdd2-4798-ac57-c04c38f46514" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f817ffa4-76ce-41a5-878b-b1d33b8d3335" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5ce7e55d-cdd2-4798-ac57-c04c38f46514" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConvertibleDebtMember_d05adec9-e14f-4fe6-a8a1-a362b59c5c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConvertibleDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_5ce7e55d-cdd2-4798-ac57-c04c38f46514" xlink:to="loc_us-gaap_ConvertibleDebtMember_d05adec9-e14f-4fe6-a8a1-a362b59c5c9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_7395ab78-2284-45e3-9426-7c6f24e37058" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_cb23d042-2d1b-4a01-92dd-ad9a56bbf0c1" xlink:to="loc_us-gaap_LongTermDebtFairValue_7395ab78-2284-45e3-9426-7c6f24e37058" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsScheduleofCarryingValueandEstimatedFairValueofLongTermDebtIncludingCurrentMaturitiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#FairValueMeasurementsScheduleofCarryingValueandEstimatedFairValueofLongTermDebtIncludingCurrentMaturitiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsScheduleofCarryingValueandEstimatedFairValueofLongTermDebtIncludingCurrentMaturitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0d6d9cb4-435d-43b9-bffc-bfaec782af74" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b6023e6b-3611-4cc9-803b-fe2f32cbcd19" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0d6d9cb4-435d-43b9-bffc-bfaec782af74" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b6023e6b-3611-4cc9-803b-fe2f32cbcd19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_10cbf30e-ed56-44de-8e28-1ac5fd38c60a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b6023e6b-3611-4cc9-803b-fe2f32cbcd19" xlink:to="loc_dei_LegalEntityAxis_10cbf30e-ed56-44de-8e28-1ac5fd38c60a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_10cbf30e-ed56-44de-8e28-1ac5fd38c60a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_10cbf30e-ed56-44de-8e28-1ac5fd38c60a" xlink:to="loc_dei_EntityDomain_10cbf30e-ed56-44de-8e28-1ac5fd38c60a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9f024a99-27a7-42f8-a81c-5812fbf99eb5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_10cbf30e-ed56-44de-8e28-1ac5fd38c60a" xlink:to="loc_dei_EntityDomain_9f024a99-27a7-42f8-a81c-5812fbf99eb5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_8cd57444-bf95-43bf-8030-056b9f2aebf6" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_9f024a99-27a7-42f8-a81c-5812fbf99eb5" xlink:to="loc_aal_AmericanAirlinesIncMember_8cd57444-bf95-43bf-8030-056b9f2aebf6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_6051d58d-9481-4d44-a2d0-9e3fef468a8a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b6023e6b-3611-4cc9-803b-fe2f32cbcd19" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_6051d58d-9481-4d44-a2d0-9e3fef468a8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6051d58d-9481-4d44-a2d0-9e3fef468a8a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_6051d58d-9481-4d44-a2d0-9e3fef468a8a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_6051d58d-9481-4d44-a2d0-9e3fef468a8a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_e1667cb1-8f1a-4448-85bf-871b58588038" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_6051d58d-9481-4d44-a2d0-9e3fef468a8a" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_e1667cb1-8f1a-4448-85bf-871b58588038" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b567ba7c-86a6-455c-86a1-3c1ee6ec1653" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_e1667cb1-8f1a-4448-85bf-871b58588038" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b567ba7c-86a6-455c-86a1-3c1ee6ec1653" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_7a2eaf7f-467a-4e06-8e72-eeda0ca333d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b567ba7c-86a6-455c-86a1-3c1ee6ec1653" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_7a2eaf7f-467a-4e06-8e72-eeda0ca333d3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_69d143b8-a778-433d-bb5f-1d8bdbefdc1c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_b567ba7c-86a6-455c-86a1-3c1ee6ec1653" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_69d143b8-a778-433d-bb5f-1d8bdbefdc1c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_882aa599-b8f5-465b-a733-733512b921ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_b6023e6b-3611-4cc9-803b-fe2f32cbcd19" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_882aa599-b8f5-465b-a733-733512b921ef" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_882aa599-b8f5-465b-a733-733512b921ef_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_882aa599-b8f5-465b-a733-733512b921ef" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_882aa599-b8f5-465b-a733-733512b921ef_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ff190a3d-a620-4023-9624-508ee063e81a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_882aa599-b8f5-465b-a733-733512b921ef" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ff190a3d-a620-4023-9624-508ee063e81a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_9d240d60-4a7e-4099-8eb6-990928d965f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ff190a3d-a620-4023-9624-508ee063e81a" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_9d240d60-4a7e-4099-8eb6-990928d965f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_a7d3af42-decb-4cad-a46f-f916de80a213" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_0d6d9cb4-435d-43b9-bffc-bfaec782af74" xlink:to="loc_us-gaap_LongTermDebtFairValue_a7d3af42-decb-4cad-a46f-f916de80a213" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/InvestmentsScheduleofEquityInvestmentsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#InvestmentsScheduleofEquityInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/InvestmentsScheduleofEquityInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_dc248d35-a84c-479b-b95f-21d6c5d37434" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_dc248d35-a84c-479b-b95f-21d6c5d37434" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_dc248d35-a84c-479b-b95f-21d6c5d37434_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_dc248d35-a84c-479b-b95f-21d6c5d37434" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_dc248d35-a84c-479b-b95f-21d6c5d37434_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_08a10dee-24b9-4a07-912e-62ee1d5c595d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_dc248d35-a84c-479b-b95f-21d6c5d37434" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_08a10dee-24b9-4a07-912e-62ee1d5c595d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RepublicAirlineIncMember_59aa1a22-f6c3-44a4-8e6b-82f53f1ffa1a" xlink:href="aal-20231231.xsd#aal_RepublicAirlineIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_08a10dee-24b9-4a07-912e-62ee1d5c595d" xlink:to="loc_aal_RepublicAirlineIncMember_59aa1a22-f6c3-44a4-8e6b-82f53f1ffa1a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_1dd77d7c-eacc-45b9-befa-65f96872039a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:to="loc_srt_OwnershipAxis_1dd77d7c-eacc-45b9-befa-65f96872039a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_1dd77d7c-eacc-45b9-befa-65f96872039a_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_1dd77d7c-eacc-45b9-befa-65f96872039a" xlink:to="loc_srt_OwnershipDomain_1dd77d7c-eacc-45b9-befa-65f96872039a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_9bd1da1a-786a-4e0e-95e3-9bcd9781e6c7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_1dd77d7c-eacc-45b9-befa-65f96872039a" xlink:to="loc_srt_OwnershipDomain_9bd1da1a-786a-4e0e-95e3-9bcd9781e6c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ChinaSouthernAirlinesCompanyLimitedMember_397f2dbe-14fd-47c2-8c53-60fc2c7c0e23" xlink:href="aal-20231231.xsd#aal_ChinaSouthernAirlinesCompanyLimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_9bd1da1a-786a-4e0e-95e3-9bcd9781e6c7" xlink:to="loc_aal_ChinaSouthernAirlinesCompanyLimitedMember_397f2dbe-14fd-47c2-8c53-60fc2c7c0e23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_710355aa-6546-4066-ab0e-2e8f864df4b9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:to="loc_dei_LegalEntityAxis_710355aa-6546-4066-ab0e-2e8f864df4b9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_710355aa-6546-4066-ab0e-2e8f864df4b9_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_710355aa-6546-4066-ab0e-2e8f864df4b9" xlink:to="loc_dei_EntityDomain_710355aa-6546-4066-ab0e-2e8f864df4b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4a367db1-4db6-4d72-8432-ed04ae453386" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_710355aa-6546-4066-ab0e-2e8f864df4b9" xlink:to="loc_dei_EntityDomain_4a367db1-4db6-4d72-8432-ed04ae453386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_b259966e-0952-476a-ae17-1051c7557541" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4a367db1-4db6-4d72-8432-ed04ae453386" xlink:to="loc_aal_AmericanAirlinesIncMember_b259966e-0952-476a-ae17-1051c7557541" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1a723c41-50b9-4851-8163-dd0a1b5caf92" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d9711f43-81f5-4dd5-b898-f102c568c01a" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1a723c41-50b9-4851-8163-dd0a1b5caf92" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1a723c41-50b9-4851-8163-dd0a1b5caf92_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1a723c41-50b9-4851-8163-dd0a1b5caf92" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1a723c41-50b9-4851-8163-dd0a1b5caf92_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_571c54c0-52bb-46ca-ba81-3de83343257f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1a723c41-50b9-4851-8163-dd0a1b5caf92" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_571c54c0-52bb-46ca-ba81-3de83343257f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_1b6e99eb-7741-4109-8618-60984bc50597" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_571c54c0-52bb-46ca-ba81-3de83343257f" xlink:to="loc_us-gaap_EquitySecuritiesMember_1b6e99eb-7741-4109-8618-60984bc50597" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_2a559dee-14ee-4faf-9e06-add43da6f3ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_2a559dee-14ee-4faf-9e06-add43da6f3ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_c7ca2409-bdea-4711-92cf-10fe3ebb5fef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_EquityMethodInvestments_c7ca2409-bdea-4711-92cf-10fe3ebb5fef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityOwnershipPercentageExcludingConsolidatedEntityAndEquityMethodInvestee_f22fc0e7-8098-4271-84aa-c22f02c30204" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityOwnershipPercentageExcludingConsolidatedEntityAndEquityMethodInvestee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_EquityOwnershipPercentageExcludingConsolidatedEntityAndEquityMethodInvestee_f22fc0e7-8098-4271-84aa-c22f02c30204" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_5bc2502f-85d6-49dc-9cad-633087df3058" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_EquitySecuritiesFvNiCurrentAndNoncurrent_5bc2502f-85d6-49dc-9cad-633087df3058" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_803826bf-36a8-4a34-b282-965c4c65649e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_OtherInvestments_803826bf-36a8-4a34-b282-965c4c65649e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_d69fdea0-1301-461e-99eb-1c76878827f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_f4d52e5b-c7ae-44fa-be04-2c6b2b09ca5e" xlink:to="loc_us-gaap_Investments_d69fdea0-1301-461e-99eb-1c76878827f4" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofChangesinProjectedBenefitObligationsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofChangesinProjectedBenefitObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofChangesinProjectedBenefitObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_66c1e3ab-9255-49d4-b1bf-11d9f4c0a58f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a3594bd-5a62-4e29-9713-4d415968ee2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_66c1e3ab-9255-49d4-b1bf-11d9f4c0a58f" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a3594bd-5a62-4e29-9713-4d415968ee2e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_52035830-2d52-4b4e-8b0e-149449cbb90f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a3594bd-5a62-4e29-9713-4d415968ee2e" xlink:to="loc_dei_LegalEntityAxis_52035830-2d52-4b4e-8b0e-149449cbb90f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_52035830-2d52-4b4e-8b0e-149449cbb90f_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_52035830-2d52-4b4e-8b0e-149449cbb90f" xlink:to="loc_dei_EntityDomain_52035830-2d52-4b4e-8b0e-149449cbb90f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a917ab32-6a8f-4d7b-8117-4acb7aebac15" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_52035830-2d52-4b4e-8b0e-149449cbb90f" xlink:to="loc_dei_EntityDomain_a917ab32-6a8f-4d7b-8117-4acb7aebac15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_b29e954d-192c-46f4-a753-b2ed32dfd6a8" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a917ab32-6a8f-4d7b-8117-4acb7aebac15" xlink:to="loc_aal_AmericanAirlinesIncMember_b29e954d-192c-46f4-a753-b2ed32dfd6a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_16013531-76a7-4a54-aba3-6124fdc8ebf2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7a3594bd-5a62-4e29-9713-4d415968ee2e" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_16013531-76a7-4a54-aba3-6124fdc8ebf2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_16013531-76a7-4a54-aba3-6124fdc8ebf2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_16013531-76a7-4a54-aba3-6124fdc8ebf2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_16013531-76a7-4a54-aba3-6124fdc8ebf2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_e71dbb97-3f78-4155-87a4-f0017b44dbde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_16013531-76a7-4a54-aba3-6124fdc8ebf2" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_e71dbb97-3f78-4155-87a4-f0017b44dbde" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_413bf7ff-15d6-4e60-afec-5a0a4f882575" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e71dbb97-3f78-4155-87a4-f0017b44dbde" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_413bf7ff-15d6-4e60-afec-5a0a4f882575" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_b4b47fe9-00bf-4d77-872e-5e47a1e06e29" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_e71dbb97-3f78-4155-87a4-f0017b44dbde" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_b4b47fe9-00bf-4d77-872e-5e47a1e06e29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_66c1e3ab-9255-49d4-b1bf-11d9f4c0a58f" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_83a2f07e-2b7c-4b5d-b03b-33f68871bd99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_83a2f07e-2b7c-4b5d-b03b-33f68871bd99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_e1bded8b-e11d-4aef-a0f2-b26fa04b46db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_e1bded8b-e11d-4aef-a0f2-b26fa04b46db" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_e7a18451-659c-4834-baca-c4b45d01a844" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_e7a18451-659c-4834-baca-c4b45d01a844" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_4b4c7901-b061-4149-8466-1334b84047dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_4b4c7901-b061-4149-8466-1334b84047dc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_ac04d04b-192d-424e-ba34-2901bc39aae4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPlanAmendments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_ac04d04b-192d-424e-ba34-2901bc39aae4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanOtherChanges_3d92fa08-e662-4820-abd4-efb74af0292d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanOtherChanges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanOtherChanges_3d92fa08-e662-4820-abd4-efb74af0292d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_89ba93fe-ed42-4ea2-b7bf-7485a1b9bca7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_47365f7b-ef62-4d4f-b2fa-667fab910083" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_89ba93fe-ed42-4ea2-b7bf-7485a1b9bca7" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_715b2110-3ec9-4f51-a326-69ac79e1621d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofChangesinFairValueofPlanAssetsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofChangesinFairValueofPlanAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofChangesinFairValueofPlanAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1466db59-6498-454e-99c4-9a315c8edf08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_42d5e61f-642e-4364-874b-f04ef55bdcd5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1466db59-6498-454e-99c4-9a315c8edf08" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_42d5e61f-642e-4364-874b-f04ef55bdcd5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_de21a8c6-0678-42e1-91e2-475e86961889" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_42d5e61f-642e-4364-874b-f04ef55bdcd5" xlink:to="loc_dei_LegalEntityAxis_de21a8c6-0678-42e1-91e2-475e86961889" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_de21a8c6-0678-42e1-91e2-475e86961889_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_de21a8c6-0678-42e1-91e2-475e86961889" xlink:to="loc_dei_EntityDomain_de21a8c6-0678-42e1-91e2-475e86961889_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_dc00a94f-8890-4020-8e7b-3784919816af" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_de21a8c6-0678-42e1-91e2-475e86961889" xlink:to="loc_dei_EntityDomain_dc00a94f-8890-4020-8e7b-3784919816af" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_dad07204-b683-4e84-8fef-fcb6f128b7f8" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_dc00a94f-8890-4020-8e7b-3784919816af" xlink:to="loc_aal_AmericanAirlinesIncMember_dad07204-b683-4e84-8fef-fcb6f128b7f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_42d5e61f-642e-4364-874b-f04ef55bdcd5" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_fb47c92d-eaf0-4fab-8ba0-e182f731d1d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_aab855cf-ac19-41a5-8b1f-a9b27e2f4ef7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_fb47c92d-eaf0-4fab-8ba0-e182f731d1d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_4eddf9da-6e40-44b3-aef2-d83f4151a4a8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_fb47c92d-eaf0-4fab-8ba0-e182f731d1d7" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_4eddf9da-6e40-44b3-aef2-d83f4151a4a8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_c57213f7-bba6-4100-b90c-736b1bfad57f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_fb47c92d-eaf0-4fab-8ba0-e182f731d1d7" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_c57213f7-bba6-4100-b90c-736b1bfad57f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1466db59-6498-454e-99c4-9a315c8edf08" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_34968469-9a47-48fa-8980-58091bbfbf25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_34968469-9a47-48fa-8980-58091bbfbf25" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_649586f0-aeee-45d7-9e3c-15e57fc7d9bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_649586f0-aeee-45d7-9e3c-15e57fc7d9bf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_a381d21d-748a-40c3-99a1-e6f1dd33a299" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_a381d21d-748a-40c3-99a1-e6f1dd33a299" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_3eb9a186-8202-4937-82af-d5602476e994" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_3eb9a186-8202-4937-82af-d5602476e994" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_584d6e14-7719-421e-9793-856fa659dc81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_89a9f1a5-41f4-4726-91b9-0393987c60e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_ae7792d7-2aa7-4f76-a7bf-56751ca4bb2b" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_89a9f1a5-41f4-4726-91b9-0393987c60e0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCurtailments_a8ec24fa-4a0c-4da5-ae1f-c58b7e34c3ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanCurtailments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1466db59-6498-454e-99c4-9a315c8edf08" xlink:to="loc_us-gaap_DefinedBenefitPlanCurtailments_a8ec24fa-4a0c-4da5-ae1f-c58b7e34c3ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanPlanAssetsRequiredContributionsByEmployer_c517a6cd-acce-4b72-bb93-80daa74accb7" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanPlanAssetsRequiredContributionsByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1466db59-6498-454e-99c4-9a315c8edf08" xlink:to="loc_aal_DefinedBenefitPlanPlanAssetsRequiredContributionsByEmployer_c517a6cd-acce-4b72-bb93-80daa74accb7" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAmountsRecognizedinConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofAmountsRecognizedinConsolidatedBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAmountsRecognizedinConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_152678b4-cd29-4acc-a085-1eb1d04a9a1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_89d27c88-53ee-4ecd-826c-8859b1f36a60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_152678b4-cd29-4acc-a085-1eb1d04a9a1e" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_89d27c88-53ee-4ecd-826c-8859b1f36a60" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_89d27c88-53ee-4ecd-826c-8859b1f36a60" xlink:to="loc_dei_LegalEntityAxis_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8" xlink:to="loc_dei_EntityDomain_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2c0383fb-7faf-4d4b-9c16-397ebf863b55" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f8e4b102-3f45-4505-b565-7f4d9eb6aaa8" xlink:to="loc_dei_EntityDomain_2c0383fb-7faf-4d4b-9c16-397ebf863b55" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_b94d08bf-eac1-4d42-a3ce-6a5e7f3831bb" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2c0383fb-7faf-4d4b-9c16-397ebf863b55" xlink:to="loc_aal_AmericanAirlinesIncMember_b94d08bf-eac1-4d42-a3ce-6a5e7f3831bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_daacba30-1e90-4b71-bb9d-40f3355b44ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_89d27c88-53ee-4ecd-826c-8859b1f36a60" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_daacba30-1e90-4b71-bb9d-40f3355b44ae" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_daacba30-1e90-4b71-bb9d-40f3355b44ae_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_daacba30-1e90-4b71-bb9d-40f3355b44ae" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_daacba30-1e90-4b71-bb9d-40f3355b44ae_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_3ee4c58f-8bc3-4645-98ee-54d056c4204c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_daacba30-1e90-4b71-bb9d-40f3355b44ae" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_3ee4c58f-8bc3-4645-98ee-54d056c4204c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_ec575105-8348-4e57-9e74-d575b4f60263" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_3ee4c58f-8bc3-4645-98ee-54d056c4204c" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_ec575105-8348-4e57-9e74-d575b4f60263" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2d253320-dc9d-4d5b-bc3f-07545ac51525" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_3ee4c58f-8bc3-4645-98ee-54d056c4204c" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2d253320-dc9d-4d5b-bc3f-07545ac51525" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_2f859c15-d5c4-4c1a-9aee-428ee24ffa7d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_152678b4-cd29-4acc-a085-1eb1d04a9a1e" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_2f859c15-d5c4-4c1a-9aee-428ee24ffa7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_6e48744c-9d11-49cb-98d4-b5e827553b40" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_152678b4-cd29-4acc-a085-1eb1d04a9a1e" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_6e48744c-9d11-49cb-98d4-b5e827553b40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_8608e2f0-7792-4712-a75e-efe2615678e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_152678b4-cd29-4acc-a085-1eb1d04a9a1e" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_8608e2f0-7792-4712-a75e-efe2615678e5" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAmountsRecognizedinOtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofAmountsRecognizedinOtherComprehensiveIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAmountsRecognizedinOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4f98ca57-5b1d-4006-a63a-9865547d3c21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82c84824-6235-4f73-9dd7-afc26d42eb0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4f98ca57-5b1d-4006-a63a-9865547d3c21" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82c84824-6235-4f73-9dd7-afc26d42eb0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_6555ef6c-4a64-4dd7-ba68-687a97e4b22c" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82c84824-6235-4f73-9dd7-afc26d42eb0e" xlink:to="loc_dei_LegalEntityAxis_6555ef6c-4a64-4dd7-ba68-687a97e4b22c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6555ef6c-4a64-4dd7-ba68-687a97e4b22c_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_6555ef6c-4a64-4dd7-ba68-687a97e4b22c" xlink:to="loc_dei_EntityDomain_6555ef6c-4a64-4dd7-ba68-687a97e4b22c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8f5111ff-3333-4637-bac2-0f79fedd60d8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_6555ef6c-4a64-4dd7-ba68-687a97e4b22c" xlink:to="loc_dei_EntityDomain_8f5111ff-3333-4637-bac2-0f79fedd60d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_7c440125-1777-42a1-a3f2-e949dac717f2" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_8f5111ff-3333-4637-bac2-0f79fedd60d8" xlink:to="loc_aal_AmericanAirlinesIncMember_7c440125-1777-42a1-a3f2-e949dac717f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_410a65f8-566f-4ee5-9e82-bb186498a2e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_82c84824-6235-4f73-9dd7-afc26d42eb0e" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_410a65f8-566f-4ee5-9e82-bb186498a2e7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_410a65f8-566f-4ee5-9e82-bb186498a2e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_410a65f8-566f-4ee5-9e82-bb186498a2e7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_410a65f8-566f-4ee5-9e82-bb186498a2e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_75059339-1f4b-430c-b969-2fc587c71fff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_410a65f8-566f-4ee5-9e82-bb186498a2e7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_75059339-1f4b-430c-b969-2fc587c71fff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0fc903bb-091d-45f6-b887-b552fbb9eb94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_75059339-1f4b-430c-b969-2fc587c71fff" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0fc903bb-091d-45f6-b887-b552fbb9eb94" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_78b0eda5-866e-47a1-be0b-6b7448adc8cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_75059339-1f4b-430c-b969-2fc587c71fff" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_78b0eda5-866e-47a1-be0b-6b7448adc8cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_1a803165-a5f0-4c59-b1aa-3dda083b9c34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4f98ca57-5b1d-4006-a63a-9865547d3c21" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_1a803165-a5f0-4c59-b1aa-3dda083b9c34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_aabb3611-a1cd-44f4-bf15-23f0cdb909fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4f98ca57-5b1d-4006-a63a-9865547d3c21" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_aabb3611-a1cd-44f4-bf15-23f0cdb909fc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_5bdebeb1-9e7d-42ef-abb0-363e2c28817d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_4f98ca57-5b1d-4006-a63a-9865547d3c21" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_5bdebeb1-9e7d-42ef-abb0-363e2c28817d" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAccumulatedBenefitObligationsExceedingFairValueofPlanAssetsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofAccumulatedBenefitObligationsExceedingFairValueofPlanAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAccumulatedBenefitObligationsExceedingFairValueofPlanAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_bd829213-c499-4e3b-86f3-513e4e4dda9a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_bd829213-c499-4e3b-86f3-513e4e4dda9a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_bd829213-c499-4e3b-86f3-513e4e4dda9a" xlink:to="loc_dei_LegalEntityAxis_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9" xlink:to="loc_dei_EntityDomain_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_7ceb562f-0eca-496c-9772-83e71124218d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_4d47e108-e2ef-4f1c-a7ab-a2b2496d09e9" xlink:to="loc_dei_EntityDomain_7ceb562f-0eca-496c-9772-83e71124218d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_5b390bb8-2a66-4e63-b146-b71b5298be53" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_7ceb562f-0eca-496c-9772-83e71124218d" xlink:to="loc_aal_AmericanAirlinesIncMember_5b390bb8-2a66-4e63-b146-b71b5298be53" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_69ce1983-7df4-4995-800a-7347c2272a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_bd829213-c499-4e3b-86f3-513e4e4dda9a" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_69ce1983-7df4-4995-800a-7347c2272a9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_69ce1983-7df4-4995-800a-7347c2272a9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_69ce1983-7df4-4995-800a-7347c2272a9c" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_69ce1983-7df4-4995-800a-7347c2272a9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_11426c7e-8574-4c38-a6a8-4bc438163e5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_69ce1983-7df4-4995-800a-7347c2272a9c" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_11426c7e-8574-4c38-a6a8-4bc438163e5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_10db27f2-4dd6-44e0-931c-d0e64deb2f7d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_11426c7e-8574-4c38-a6a8-4bc438163e5c" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_10db27f2-4dd6-44e0-931c-d0e64deb2f7d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_edeaa51e-3e8a-41d2-9934-52b035f5e48c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_11426c7e-8574-4c38-a6a8-4bc438163e5c" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_edeaa51e-3e8a-41d2-9934-52b035f5e48c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_9717a0f1-c3b6-41d1-9ed9-07cc36023cc8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsProjectedBenefitObligation_9717a0f1-c3b6-41d1-9ed9-07cc36023cc8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_9bb7fc82-2a1f-44ff-9a94-44fea34a1e88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlanWithProjectedBenefitObligationInExcessOfPlanAssetsPlanAssets_9bb7fc82-2a1f-44ff-9a94-44fea34a1e88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_fb8f39b0-5528-4c74-8d3c-0765ec78b764" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_fb8f39b0-5528-4c74-8d3c-0765ec78b764" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_3678db04-5591-4fd3-b17f-340d1fb51797" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_e090224f-42f9-4e4c-a0a7-9b12f1c217bd" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_3678db04-5591-4fd3-b17f-340d1fb51797" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansComponentsofNetPeriodicBenefitCostIncomeDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansComponentsofNetPeriodicBenefitCostIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansComponentsofNetPeriodicBenefitCostIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_ad3deb47-f0bf-4217-b101-e929c0bef81d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9a24c7dd-7e50-4917-9e98-843bd7c871de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_ad3deb47-f0bf-4217-b101-e929c0bef81d" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9a24c7dd-7e50-4917-9e98-843bd7c871de" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_d37fc94f-fc4a-462c-b0b2-52a203c52cc0" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9a24c7dd-7e50-4917-9e98-843bd7c871de" xlink:to="loc_dei_LegalEntityAxis_d37fc94f-fc4a-462c-b0b2-52a203c52cc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d37fc94f-fc4a-462c-b0b2-52a203c52cc0_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_d37fc94f-fc4a-462c-b0b2-52a203c52cc0" xlink:to="loc_dei_EntityDomain_d37fc94f-fc4a-462c-b0b2-52a203c52cc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_23afe6f1-1c01-4294-af9a-08343bf56ce7" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_d37fc94f-fc4a-462c-b0b2-52a203c52cc0" xlink:to="loc_dei_EntityDomain_23afe6f1-1c01-4294-af9a-08343bf56ce7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_80f6d285-6045-48d2-a99f-863110e89153" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_23afe6f1-1c01-4294-af9a-08343bf56ce7" xlink:to="loc_aal_AmericanAirlinesIncMember_80f6d285-6045-48d2-a99f-863110e89153" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_a602aa85-6682-4bd1-9b14-d632451988c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9a24c7dd-7e50-4917-9e98-843bd7c871de" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_a602aa85-6682-4bd1-9b14-d632451988c5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_a602aa85-6682-4bd1-9b14-d632451988c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_a602aa85-6682-4bd1-9b14-d632451988c5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_a602aa85-6682-4bd1-9b14-d632451988c5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_d99baa53-0bb5-4bac-a420-cc97c77b164f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_a602aa85-6682-4bd1-9b14-d632451988c5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_d99baa53-0bb5-4bac-a420-cc97c77b164f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_b6f97d2e-2414-435c-83bb-bbc4f9fd516d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_d99baa53-0bb5-4bac-a420-cc97c77b164f" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_b6f97d2e-2414-435c-83bb-bbc4f9fd516d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6e509066-61f0-4748-88cb-f6dfa8590ea0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_d99baa53-0bb5-4bac-a420-cc97c77b164f" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6e509066-61f0-4748-88cb-f6dfa8590ea0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_ad3deb47-f0bf-4217-b101-e929c0bef81d" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_ab044290-b4f4-4c19-ad7c-60fd31b6acd3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_ab044290-b4f4-4c19-ad7c-60fd31b6acd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_6aaac04e-e419-4cc6-975f-6fb4d6c6c95f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_6aaac04e-e419-4cc6-975f-6fb4d6c6c95f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_568109ca-68c3-4c8f-96d9-bc824b39b543" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_568109ca-68c3-4c8f-96d9-bc824b39b543" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_98e2eaa2-8a1b-4142-b2b6-e26f931df4a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments_98e2eaa2-8a1b-4142-b2b6-e26f931df4a4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationAmountsAbstract_d7138624-cd9e-4c78-ab3e-fe08797718f2" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationAmountsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_aal_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationAmountsAbstract_d7138624-cd9e-4c78-ab3e-fe08797718f2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_95e77afc-876d-4db5-a863-b6e6f2f0e222" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationAmountsAbstract_d7138624-cd9e-4c78-ab3e-fe08797718f2" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_95e77afc-876d-4db5-a863-b6e6f2f0e222" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d663593c-4226-4b44-a7a1-26281fde3969" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_DefinedBenefitPlanNetPeriodicBenefitCostCreditAmortizationAmountsAbstract_d7138624-cd9e-4c78-ab3e-fe08797718f2" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_d663593c-4226-4b44-a7a1-26281fde3969" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ebaf335a-5fe0-44bc-871a-8af6bd88fa31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_bd6fb5c8-0e53-4a80-8885-3d52706d407e" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_ebaf335a-5fe0-44bc-871a-8af6bd88fa31" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAssumptionUsedtoDetermineBenefitObligationsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofAssumptionUsedtoDetermineBenefitObligationsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAssumptionUsedtoDetermineBenefitObligationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_f863ccf2-7e02-4a23-85bf-25966e2d72da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2967c878-5e6f-4c54-85ea-99bf1d4119da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_f863ccf2-7e02-4a23-85bf-25966e2d72da" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2967c878-5e6f-4c54-85ea-99bf1d4119da" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2967c878-5e6f-4c54-85ea-99bf1d4119da" xlink:to="loc_dei_LegalEntityAxis_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2" xlink:to="loc_dei_EntityDomain_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_40ec6d67-76f2-49d7-8dc2-533757b9f82b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_e1ed3d5d-c4c8-44d8-a5fa-43fb374214b2" xlink:to="loc_dei_EntityDomain_40ec6d67-76f2-49d7-8dc2-533757b9f82b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f77751f8-9b8a-453c-9ad4-e93a40cd598a" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_40ec6d67-76f2-49d7-8dc2-533757b9f82b" xlink:to="loc_aal_AmericanAirlinesIncMember_f77751f8-9b8a-453c-9ad4-e93a40cd598a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_33dd1f6b-8970-46d6-9468-e0998febea81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_2967c878-5e6f-4c54-85ea-99bf1d4119da" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_33dd1f6b-8970-46d6-9468-e0998febea81" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_33dd1f6b-8970-46d6-9468-e0998febea81_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_33dd1f6b-8970-46d6-9468-e0998febea81" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_33dd1f6b-8970-46d6-9468-e0998febea81_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2f5f64fa-b812-4d19-b2e8-946dbe63f6aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_33dd1f6b-8970-46d6-9468-e0998febea81" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2f5f64fa-b812-4d19-b2e8-946dbe63f6aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0c75fba0-5583-4881-ad24-a77dc3b6e06a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2f5f64fa-b812-4d19-b2e8-946dbe63f6aa" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0c75fba0-5583-4881-ad24-a77dc3b6e06a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_07e50dd3-6a29-4143-bf8a-e7fe4c05b426" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2f5f64fa-b812-4d19-b2e8-946dbe63f6aa" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_07e50dd3-6a29-4143-bf8a-e7fe4c05b426" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_a720f415-019c-4617-97c8-263316905cd6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_f863ccf2-7e02-4a23-85bf-25966e2d72da" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_a720f415-019c-4617-97c8-263316905cd6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_5053e46c-a680-4638-9454-80a93255386b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingBenefitObligationAbstract_a720f415-019c-4617-97c8-263316905cd6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_5053e46c-a680-4638-9454-80a93255386b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_f863ccf2-7e02-4a23-85bf-25966e2d72da" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_557b74c6-fad7-476c-89f5-ab7702a595f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_557b74c6-fad7-476c-89f5-ab7702a595f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_312cb8ce-928e-4459-a36a-05cbc10cda5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_312cb8ce-928e-4459-a36a-05cbc10cda5e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_bea7cd96-63c4-4b16-b7d8-d694d31a5824" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_bea7cd96-63c4-4b16-b7d8-d694d31a5824" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_d13b4e4b-b2fb-4aba-91bd-4a00be08c67c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostAbstract_c6a4a50e-f866-48e0-9bb2-568a75105ef6" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_d13b4e4b-b2fb-4aba-91bd-4a00be08c67c" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1bb45ec4-762c-4095-ad1c-52845a83ecb8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1bb45ec4-762c-4095-ad1c-52845a83ecb8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_c94ab058-f5ac-4b88-bbd2-1685ea6c6629" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1bb45ec4-762c-4095-ad1c-52845a83ecb8" xlink:to="loc_dei_LegalEntityAxis_c94ab058-f5ac-4b88-bbd2-1685ea6c6629" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c94ab058-f5ac-4b88-bbd2-1685ea6c6629_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_c94ab058-f5ac-4b88-bbd2-1685ea6c6629" xlink:to="loc_dei_EntityDomain_c94ab058-f5ac-4b88-bbd2-1685ea6c6629_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_1595708f-af76-4d19-a2c2-c33377d42327" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_c94ab058-f5ac-4b88-bbd2-1685ea6c6629" xlink:to="loc_dei_EntityDomain_1595708f-af76-4d19-a2c2-c33377d42327" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_e9a72277-7cbc-42b2-8c50-0b1bc80dd12f" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_1595708f-af76-4d19-a2c2-c33377d42327" xlink:to="loc_aal_AmericanAirlinesIncMember_e9a72277-7cbc-42b2-8c50-0b1bc80dd12f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameAxis_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1bb45ec4-762c-4095-ad1c-52845a83ecb8" xlink:to="loc_us-gaap_RetirementPlanNameAxis_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924" xlink:to="loc_us-gaap_RetirementPlanNameDomain_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_dec7733e-6bee-44c1-9941-400597219c56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_7f2aa65b-e5bd-481d-bc6b-e5d4728ba924" xlink:to="loc_us-gaap_RetirementPlanNameDomain_dec7733e-6bee-44c1-9941-400597219c56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_InternationalAssociationOfMachinistsAndAerospaceWorkersNationalPensionFundMember_f7e24230-c296-4a3f-8264-0db6063cc771" xlink:href="aal-20231231.xsd#aal_InternationalAssociationOfMachinistsAndAerospaceWorkersNationalPensionFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanNameDomain_dec7733e-6bee-44c1-9941-400597219c56" xlink:to="loc_aal_InternationalAssociationOfMachinistsAndAerospaceWorkersNationalPensionFundMember_f7e24230-c296-4a3f-8264-0db6063cc771" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_0217be7c-9390-46dc-8e89-3a2c8b8b9140" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1bb45ec4-762c-4095-ad1c-52845a83ecb8" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_0217be7c-9390-46dc-8e89-3a2c8b8b9140" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_0217be7c-9390-46dc-8e89-3a2c8b8b9140_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_0217be7c-9390-46dc-8e89-3a2c8b8b9140" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_0217be7c-9390-46dc-8e89-3a2c8b8b9140_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_4a6a7c02-9ab8-4cff-84b0-c85b623d3110" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_0217be7c-9390-46dc-8e89-3a2c8b8b9140" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_4a6a7c02-9ab8-4cff-84b0-c85b623d3110" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_7052c595-c67a-4a72-bdcb-c35baa2d3375" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_4a6a7c02-9ab8-4cff-84b0-c85b623d3110" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_7052c595-c67a-4a72-bdcb-c35baa2d3375" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_61a4952f-678c-4a74-9535-30866407fce5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_61a4952f-678c-4a74-9535-30866407fce5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanAssumptionsUsedForExpectedLongTermRateOfReturnOnPlanAssetsActualReturnsAchievedTerm_9dc1b601-9985-43d8-b7b9-92af84c3b66f" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanAssumptionsUsedForExpectedLongTermRateOfReturnOnPlanAssetsActualReturnsAchievedTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_aal_DefinedBenefitPlanAssumptionsUsedForExpectedLongTermRateOfReturnOnPlanAssetsActualReturnsAchievedTerm_9dc1b601-9985-43d8-b7b9-92af84c3b66f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_e3d83326-9591-4aa1-a1ca-37670841c8bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_e3d83326-9591-4aa1-a1ca-37670841c8bb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_609d4b58-914e-44b9-8c2f-2bed7acb8741" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareLiquidatingInvestmentRemainingPeriod1_609d4b58-914e-44b9-8c2f-2bed7acb8741" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_fe8b0bb8-48df-4127-b59a-b419952bbf19" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_FairValueInvestmentsEntitiesThatCalculateNetAssetValuePerShareUnfundedCommittments_fe8b0bb8-48df-4127-b59a-b419952bbf19" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanMasterTrustFutureFundingCommitmentsPeriod_ca39f60e-afd3-4e30-8ae3-dfc1eb325cca" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanMasterTrustFutureFundingCommitmentsPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_aal_DefinedBenefitPlanMasterTrustFutureFundingCommitmentsPeriod_ca39f60e-afd3-4e30-8ae3-dfc1eb325cca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_1ca18f0c-ee27-48ab-a68e-a16c54d6b900" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedContributionPlanCostRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_1ca18f0c-ee27-48ab-a68e-a16c54d6b900" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlanPensionSignificantEmployerContributionCost_aae1f89a-7d44-44e5-8e1b-de79c762282a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MultiemployerPlanPensionSignificantEmployerContributionCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_MultiemployerPlanPensionSignificantEmployerContributionCost_aae1f89a-7d44-44e5-8e1b-de79c762282a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MultiemployerPlanEmployerContributionCost_651bf1d3-921a-4b24-b8e3-67da97288295" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MultiemployerPlanEmployerContributionCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_us-gaap_MultiemployerPlanEmployerContributionCost_651bf1d3-921a-4b24-b8e3-67da97288295" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MultiemployerPlanContributionsByEmployerPercentageOfTotalContributions_27d4a892-8119-4642-a941-bde013662967" xlink:href="aal-20231231.xsd#aal_MultiemployerPlanContributionsByEmployerPercentageOfTotalContributions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_aal_MultiemployerPlanContributionsByEmployerPercentageOfTotalContributions_27d4a892-8119-4642-a941-bde013662967" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MultiemployerPlansFundedStatusPercentage_8f013ba7-aa99-4898-8971-d7daae8ae47e" xlink:href="aal-20231231.xsd#aal_MultiemployerPlansFundedStatusPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_aal_MultiemployerPlansFundedStatusPercentage_8f013ba7-aa99-4898-8971-d7daae8ae47e" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_MultiemployerPlansFundingImprovementPlanAndRehabilitationPlanAnnualPercentageIncreaseInContributionRateByEmployer_0bad7dca-3d2b-4048-a088-b68586e380ff" xlink:href="aal-20231231.xsd#aal_MultiemployerPlansFundingImprovementPlanAndRehabilitationPlanAnnualPercentageIncreaseInContributionRateByEmployer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_7d05646a-73ba-4519-a9b8-81505edf81d5" xlink:to="loc_aal_MultiemployerPlansFundingImprovementPlanAndRehabilitationPlanAnnualPercentageIncreaseInContributionRateByEmployer_0bad7dca-3d2b-4048-a088-b68586e380ff" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofExpectedFutureServiceBenefitPaymentsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofExpectedFutureServiceBenefitPaymentsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofExpectedFutureServiceBenefitPaymentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_abca2aa6-982c-444e-9369-d4a5bd75ec13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_abca2aa6-982c-444e-9369-d4a5bd75ec13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_abca2aa6-982c-444e-9369-d4a5bd75ec13" xlink:to="loc_dei_LegalEntityAxis_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95" xlink:to="loc_dei_EntityDomain_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_6a6480c3-421a-476f-8799-8a227af020a5" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_0a64a3d9-baf1-4a99-b66c-e1ba1c829e95" xlink:to="loc_dei_EntityDomain_6a6480c3-421a-476f-8799-8a227af020a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_e12e0c8e-c405-4e9a-9045-94fa178cec84" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_6a6480c3-421a-476f-8799-8a227af020a5" xlink:to="loc_aal_AmericanAirlinesIncMember_e12e0c8e-c405-4e9a-9045-94fa178cec84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_cd25207e-087b-4679-b985-3791b1317b66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_abca2aa6-982c-444e-9369-d4a5bd75ec13" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_cd25207e-087b-4679-b985-3791b1317b66" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_cd25207e-087b-4679-b985-3791b1317b66_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_cd25207e-087b-4679-b985-3791b1317b66" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_cd25207e-087b-4679-b985-3791b1317b66_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_d856e7bd-e822-44a5-94c0-0c70362209a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_cd25207e-087b-4679-b985-3791b1317b66" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_d856e7bd-e822-44a5-94c0-0c70362209a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_5caa0493-5465-4149-8f8d-05388b08a322" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_d856e7bd-e822-44a5-94c0-0c70362209a9" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_5caa0493-5465-4149-8f8d-05388b08a322" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_fb8230b6-f8c8-45e4-8ed8-f8fdff4d35f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_d856e7bd-e822-44a5-94c0-0c70362209a9" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_fb8230b6-f8c8-45e4-8ed8-f8fdff4d35f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_cac60b8d-9ddc-400f-9c59-753c501ce3c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_cac60b8d-9ddc-400f-9c59-753c501ce3c8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_60b22fe8-31c9-4799-89d8-d15db0ef9054" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_60b22fe8-31c9-4799-89d8-d15db0ef9054" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_57fdebca-c5fb-4985-80b7-73e00f6cbb51" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_57fdebca-c5fb-4985-80b7-73e00f6cbb51" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_7f1a85cc-3ce5-4d70-b204-1275495c4c46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_7f1a85cc-3ce5-4d70-b204-1275495c4c46" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_2c24854a-b795-49b9-9169-ae78024045f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_2c24854a-b795-49b9-9169-ae78024045f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_f02e30af-5270-4bca-bcf7-d32c67b21263" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_50b4594d-6a22-4f75-9d55-10b916ae415c" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_f02e30af-5270-4bca-bcf7-d32c67b21263" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAllocationofPlanAssetsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofAllocationofPlanAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofAllocationofPlanAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_211384b3-fab4-4309-a7e0-1ce669a3fa0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_67f0432c-9b4b-441c-8fc3-4bb3320b44cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_211384b3-fab4-4309-a7e0-1ce669a3fa0e" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_67f0432c-9b4b-441c-8fc3-4bb3320b44cc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_cf53f592-6f83-4d08-9593-10ba11384637" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_67f0432c-9b4b-441c-8fc3-4bb3320b44cc" xlink:to="loc_dei_LegalEntityAxis_cf53f592-6f83-4d08-9593-10ba11384637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cf53f592-6f83-4d08-9593-10ba11384637_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_cf53f592-6f83-4d08-9593-10ba11384637" xlink:to="loc_dei_EntityDomain_cf53f592-6f83-4d08-9593-10ba11384637_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_67dbbcf9-4f1d-46f3-85b9-576d10663c2f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_cf53f592-6f83-4d08-9593-10ba11384637" xlink:to="loc_dei_EntityDomain_67dbbcf9-4f1d-46f3-85b9-576d10663c2f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_e456d4fe-8164-4ee7-ac7a-035c8bb919b7" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_67dbbcf9-4f1d-46f3-85b9-576d10663c2f" xlink:to="loc_aal_AmericanAirlinesIncMember_e456d4fe-8164-4ee7-ac7a-035c8bb919b7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_4cf5acde-e252-4bdc-84e6-393c7fe5e334" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_67f0432c-9b4b-441c-8fc3-4bb3320b44cc" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_4cf5acde-e252-4bdc-84e6-393c7fe5e334" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_4cf5acde-e252-4bdc-84e6-393c7fe5e334_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_4cf5acde-e252-4bdc-84e6-393c7fe5e334" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_4cf5acde-e252-4bdc-84e6-393c7fe5e334_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_4cf5acde-e252-4bdc-84e6-393c7fe5e334" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_4f6e42c0-c098-4ed4-b490-264d1abaa4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_4f6e42c0-c098-4ed4-b490-264d1abaa4dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsLargeCapMember_7957dcbe-69a7-40df-adae-8f1aea968870" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesUsLargeCapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesUsLargeCapMember_7957dcbe-69a7-40df-adae-8f1aea968870" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanEquitySecuritiesUSSmallMidCapMember_3ddab9ba-beff-4a7b-bdf2-dc5ed1da635d" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanEquitySecuritiesUSSmallMidCapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_DefinedBenefitPlanEquitySecuritiesUSSmallMidCapMember_3ddab9ba-beff-4a7b-bdf2-dc5ed1da635d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanEquitySecuritiesNonUSLargeMember_b7f8c766-e7b3-4a5f-9f9b-0498a91b8f86" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanEquitySecuritiesNonUSLargeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_DefinedBenefitPlanEquitySecuritiesNonUSLargeMember_b7f8c766-e7b3-4a5f-9f9b-0498a91b8f86" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanEquitySecuritiesNonUSSmallMidMember_e6103404-305b-4a96-8ae4-57e04a9bb824" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanEquitySecuritiesNonUSSmallMidMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_DefinedBenefitPlanEquitySecuritiesNonUSSmallMidMember_e6103404-305b-4a96-8ae4-57e04a9bb824" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_EmergingMarketsMember_e37d39ab-da62-4edc-ad74-5a59f57376cf" xlink:href="aal-20231231.xsd#aal_EmergingMarketsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_EmergingMarketsMember_e37d39ab-da62-4edc-ad74-5a59f57376cf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_eca4f27d-355f-43c1-aa10-76a048bc05ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_PrivateEquityFundsMember_eca4f27d-355f-43c1-aa10-76a048bc05ca" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_9056a154-055a-4a54-8f43-d7f78816b6be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDebtSecurityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_DefinedBenefitPlanDebtSecurityMember_9056a154-055a-4a54-8f43-d7f78816b6be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeSecuritiesMember_7b8642d6-2e78-48b0-9fb0-1c71017471a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedIncomeSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_FixedIncomeSecuritiesMember_7b8642d6-2e78-48b0-9fb0-1c71017471a3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PrivateFixedIncomeMember_e9a7ae54-bc7f-41eb-8aa0-69fb406de47f" xlink:href="aal-20231231.xsd#aal_PrivateFixedIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_PrivateFixedIncomeMember_e9a7ae54-bc7f-41eb-8aa0-69fb406de47f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanOtherInvestmentMember_127ef6c2-b416-475c-b13a-07aef2d57e8b" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanOtherInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_aal_DefinedBenefitPlanOtherInvestmentMember_127ef6c2-b416-475c-b13a-07aef2d57e8b" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_43ea37cf-8cb2-43a2-8203-87eba1baed07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_04fd3f69-d263-4d08-94e1-0f5be66b6b73" xlink:to="loc_us-gaap_DefinedBenefitPlanCashAndCashEquivalentsMember_43ea37cf-8cb2-43a2-8203-87eba1baed07" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_2f201bdf-bea7-48d7-a5e4-6a84ea725974" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_67f0432c-9b4b-441c-8fc3-4bb3320b44cc" xlink:to="loc_srt_RangeAxis_2f201bdf-bea7-48d7-a5e4-6a84ea725974" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2f201bdf-bea7-48d7-a5e4-6a84ea725974_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_2f201bdf-bea7-48d7-a5e4-6a84ea725974" xlink:to="loc_srt_RangeMember_2f201bdf-bea7-48d7-a5e4-6a84ea725974_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_499ec9f9-7cca-401f-937d-bf84bae4a043" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_2f201bdf-bea7-48d7-a5e4-6a84ea725974" xlink:to="loc_srt_RangeMember_499ec9f9-7cca-401f-937d-bf84bae4a043" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_4bd2d65b-e991-4563-bdc7-97fb7be498e9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_499ec9f9-7cca-401f-937d-bf84bae4a043" xlink:to="loc_srt_MinimumMember_4bd2d65b-e991-4563-bdc7-97fb7be498e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_cee0c590-e48b-4691-96ad-d37afbc8b2d5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_499ec9f9-7cca-401f-937d-bf84bae4a043" xlink:to="loc_srt_MaximumMember_cee0c590-e48b-4691-96ad-d37afbc8b2d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_bd4d6705-100e-4136-815f-a7be76b09590" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_211384b3-fab4-4309-a7e0-1ce669a3fa0e" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_bd4d6705-100e-4136-815f-a7be76b09590" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleofFairValueofPensionPlanAssetsbyAssetCategoryDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansScheduleofFairValueofPensionPlanAssetsbyAssetCategoryDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleofFairValueofPensionPlanAssetsbyAssetCategoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_da30a52a-4ed2-4f63-a987-98c6e7f460c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_da30a52a-4ed2-4f63-a987-98c6e7f460c1" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_138fc0a2-4a9b-4302-be90-b0c4b9a88897" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:to="loc_dei_LegalEntityAxis_138fc0a2-4a9b-4302-be90-b0c4b9a88897" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_138fc0a2-4a9b-4302-be90-b0c4b9a88897_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_138fc0a2-4a9b-4302-be90-b0c4b9a88897" xlink:to="loc_dei_EntityDomain_138fc0a2-4a9b-4302-be90-b0c4b9a88897_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_dd99fca4-1c35-446d-b183-bcb880682bab" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_138fc0a2-4a9b-4302-be90-b0c4b9a88897" xlink:to="loc_dei_EntityDomain_dd99fca4-1c35-446d-b183-bcb880682bab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_92e0ee16-ca35-4a4b-976d-89af2aad60ce" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_dd99fca4-1c35-446d-b183-bcb880682bab" xlink:to="loc_aal_AmericanAirlinesIncMember_92e0ee16-ca35-4a4b-976d-89af2aad60ce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_6ec5750f-f504-4245-91d0-90e15f2cd0d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_6ec5750f-f504-4245-91d0-90e15f2cd0d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6ec5750f-f504-4245-91d0-90e15f2cd0d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_6ec5750f-f504-4245-91d0-90e15f2cd0d9" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6ec5750f-f504-4245-91d0-90e15f2cd0d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_01434f36-6ef8-4e9d-a532-05c77621cb59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_6ec5750f-f504-4245-91d0-90e15f2cd0d9" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_01434f36-6ef8-4e9d-a532-05c77621cb59" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_540f39b1-3eb2-4cc0-88d8-2526bfe08649" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_01434f36-6ef8-4e9d-a532-05c77621cb59" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_540f39b1-3eb2-4cc0-88d8-2526bfe08649" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementFrequencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_86fe7a13-ea10-4f0a-8682-3db5f039af26" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementFrequencyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_baa1b0ed-b0f6-48c7-b1d6-7bccb17545ca" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_86fe7a13-ea10-4f0a-8682-3db5f039af26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_a0ece9d2-d039-4b66-bfcf-7be41f512039" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsRecurringMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_86fe7a13-ea10-4f0a-8682-3db5f039af26" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_a0ece9d2-d039-4b66-bfcf-7be41f512039" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_2392b9d4-73df-4008-9f6c-b504ef374cfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_2392b9d4-73df-4008-9f6c-b504ef374cfa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_2392b9d4-73df-4008-9f6c-b504ef374cfa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_2392b9d4-73df-4008-9f6c-b504ef374cfa" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_2392b9d4-73df-4008-9f6c-b504ef374cfa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanAssetCategoriesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_2392b9d4-73df-4008-9f6c-b504ef374cfa" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_2b9109b9-eeec-478f-bc7f-00a901866676" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanEquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:to="loc_us-gaap_DefinedBenefitPlanEquitySecuritiesMember_2b9109b9-eeec-478f-bc7f-00a901866676" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedIncomeInvestmentsMember_991cef3b-41f6-48ca-aceb-1704387e8384" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedIncomeInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:to="loc_us-gaap_FixedIncomeInvestmentsMember_991cef3b-41f6-48ca-aceb-1704387e8384" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_DefinedBenefitPlanOtherInvestmentMember_1c135f57-d86d-4eab-bf17-279e4fef9e1f" xlink:href="aal-20231231.xsd#aal_DefinedBenefitPlanOtherInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:to="loc_aal_DefinedBenefitPlanOtherInvestmentMember_1c135f57-d86d-4eab-bf17-279e4fef9e1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_7b1311db-d29b-4e26-9891-36465b256a26" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:to="loc_us-gaap_DefinedBenefitPlanCommonCollectiveTrustMember_7b1311db-d29b-4e26-9891-36465b256a26" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrivateEquityFundsMember_d8f30285-1f15-4e9a-9422-c7e5850eaf7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrivateEquityFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_258bfb51-0ab9-4347-b85e-63566d2c7496" xlink:to="loc_us-gaap_PrivateEquityFundsMember_d8f30285-1f15-4e9a-9422-c7e5850eaf7e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3a001903-67c4-4a33-8c40-664cd7313ae2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_5733104e-b4b2-4a64-bc22-3b9bbf8d7e79" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3a001903-67c4-4a33-8c40-664cd7313ae2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3a001903-67c4-4a33-8c40-664cd7313ae2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3a001903-67c4-4a33-8c40-664cd7313ae2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3a001903-67c4-4a33-8c40-664cd7313ae2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f7549142-9f61-414c-ae28-67e95fe6b53e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_3a001903-67c4-4a33-8c40-664cd7313ae2" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f7549142-9f61-414c-ae28-67e95fe6b53e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel12And3Member_551cd444-3691-4d48-9069-1f09649c3259" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel12And3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f7549142-9f61-414c-ae28-67e95fe6b53e" xlink:to="loc_us-gaap_FairValueInputsLevel12And3Member_551cd444-3691-4d48-9069-1f09649c3259" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_34f973a5-de4c-48f4-81e0-5276bfba86dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_551cd444-3691-4d48-9069-1f09649c3259" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_34f973a5-de4c-48f4-81e0-5276bfba86dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_a1afe484-2e18-4e2d-a4a4-a8e9063db684" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_551cd444-3691-4d48-9069-1f09649c3259" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_a1afe484-2e18-4e2d-a4a4-a8e9063db684" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_e0aea0cd-b74e-4335-81af-9f3e3a4b790a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueInputsLevel12And3Member_551cd444-3691-4d48-9069-1f09649c3259" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_e0aea0cd-b74e-4335-81af-9f3e3a4b790a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_b7a57283-6a7b-4787-99eb-79bdb2886f94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f7549142-9f61-414c-ae28-67e95fe6b53e" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_b7a57283-6a7b-4787-99eb-79bdb2886f94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_e5c3becf-e4bd-4de4-b1a6-f32ea82c3974" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_da30a52a-4ed2-4f63-a987-98c6e7f460c1" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_e5c3becf-e4bd-4de4-b1a6-f32ea82c3974" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansChangesinFairValueMeasurementsofLevel3InvestmentsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansChangesinFairValueMeasurementsofLevel3InvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansChangesinFairValueMeasurementsofLevel3InvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_64bae4fc-332d-4a5e-9f28-ec8b66afac73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_17f5e0c7-da82-48f6-9ea3-bce109570463" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_64bae4fc-332d-4a5e-9f28-ec8b66afac73" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_17f5e0c7-da82-48f6-9ea3-bce109570463" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_21e090ac-3ac4-4bfa-9810-7a141416ff26" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_17f5e0c7-da82-48f6-9ea3-bce109570463" xlink:to="loc_dei_LegalEntityAxis_21e090ac-3ac4-4bfa-9810-7a141416ff26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_21e090ac-3ac4-4bfa-9810-7a141416ff26_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_21e090ac-3ac4-4bfa-9810-7a141416ff26" xlink:to="loc_dei_EntityDomain_21e090ac-3ac4-4bfa-9810-7a141416ff26_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_415a8a02-bef0-485a-841b-5acb1347f488" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_21e090ac-3ac4-4bfa-9810-7a141416ff26" xlink:to="loc_dei_EntityDomain_415a8a02-bef0-485a-841b-5acb1347f488" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_78ba58ac-0d5f-4a8b-86f0-14ad4679b095" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_415a8a02-bef0-485a-841b-5acb1347f488" xlink:to="loc_aal_AmericanAirlinesIncMember_78ba58ac-0d5f-4a8b-86f0-14ad4679b095" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_857e7a1e-1e0e-4903-a108-39e015e48c0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_17f5e0c7-da82-48f6-9ea3-bce109570463" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_857e7a1e-1e0e-4903-a108-39e015e48c0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_857e7a1e-1e0e-4903-a108-39e015e48c0a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_857e7a1e-1e0e-4903-a108-39e015e48c0a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_857e7a1e-1e0e-4903-a108-39e015e48c0a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cf9d9762-4c27-4450-ba77-d5fe24ff4c35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_857e7a1e-1e0e-4903-a108-39e015e48c0a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cf9d9762-4c27-4450-ba77-d5fe24ff4c35" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_113a2d85-1efe-4fd1-8bdc-025cb5a8ef2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_cf9d9762-4c27-4450-ba77-d5fe24ff4c35" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_113a2d85-1efe-4fd1-8bdc-025cb5a8ef2e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_64bae4fc-332d-4a5e-9f28-ec8b66afac73" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_364a3c16-b78a-4a80-8aff-d6120645bc22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_364a3c16-b78a-4a80-8aff-d6120645bc22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_d8135304-39b8-44c5-a0ee-0e6be91a62a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_d8135304-39b8-44c5-a0ee-0e6be91a62a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationIncreaseForPurchase_a958d61d-5f0e-491a-80c4-d1429536ab10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationIncreaseForPurchase"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationIncreaseForPurchase_a958d61d-5f0e-491a-80c4-d1429536ab10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationDecreaseForSale_712390e0-2108-4b85-bc0e-710c27e50572" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationDecreaseForSale"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsLevel3ReconciliationDecreaseForSale_712390e0-2108-4b85-bc0e-710c27e50572" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_d63ec6fe-c958-4bfb-90ae-4d9bb7e69595" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_c0a82136-475b-4d88-bb03-d61b6642511d" xlink:to="loc_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_d63ec6fe-c958-4bfb-90ae-4d9bb7e69595" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_d434e931-2059-4d25-8b89-29718757940c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansProfitSharingProgramDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#EmployeeBenefitPlansProfitSharingProgramDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansProfitSharingProgramDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_4af556f9-9333-4891-b485-f37f58aa98d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_5abff04b-9315-4249-8d8e-5f04e7c4edad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_4af556f9-9333-4891-b485-f37f58aa98d7" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_5abff04b-9315-4249-8d8e-5f04e7c4edad" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_3882c2ba-47ff-4c00-ab96-361050330ae9" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_5abff04b-9315-4249-8d8e-5f04e7c4edad" xlink:to="loc_dei_LegalEntityAxis_3882c2ba-47ff-4c00-ab96-361050330ae9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3882c2ba-47ff-4c00-ab96-361050330ae9_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_3882c2ba-47ff-4c00-ab96-361050330ae9" xlink:to="loc_dei_EntityDomain_3882c2ba-47ff-4c00-ab96-361050330ae9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_0687752f-d241-4ec6-b54b-dba858485176" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_3882c2ba-47ff-4c00-ab96-361050330ae9" xlink:to="loc_dei_EntityDomain_0687752f-d241-4ec6-b54b-dba858485176" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f762dc1e-1c26-4408-b16a-34dd0c67e811" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_0687752f-d241-4ec6-b54b-dba858485176" xlink:to="loc_aal_AmericanAirlinesIncMember_f762dc1e-1c26-4408-b16a-34dd0c67e811" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_da531fd5-acf9-4788-aa24-4f772ded0a27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_5abff04b-9315-4249-8d8e-5f04e7c4edad" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_da531fd5-acf9-4788-aa24-4f772ded0a27" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_da531fd5-acf9-4788-aa24-4f772ded0a27_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_da531fd5-acf9-4788-aa24-4f772ded0a27" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_da531fd5-acf9-4788-aa24-4f772ded0a27_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_0a9591e9-52cd-442b-962b-f3d7e555723a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_da531fd5-acf9-4788-aa24-4f772ded0a27" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_0a9591e9-52cd-442b-962b-f3d7e555723a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredProfitSharingMember_921dedf2-8d89-4343-ae4b-2ec6035c75c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredProfitSharingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_0a9591e9-52cd-442b-962b-f3d7e555723a" xlink:to="loc_us-gaap_DeferredProfitSharingMember_921dedf2-8d89-4343-ae4b-2ec6035c75c7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_5169d164-8e95-4499-8e65-d4be9a26d11d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_4af556f9-9333-4891-b485-f37f58aa98d7" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualRecordedLiability_5169d164-8e95-4499-8e65-d4be9a26d11d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveLossAOCIDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveLossAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveLossComponentsofAccumulatedOtherComprehensiveLossAOCIDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_932663d3-61e8-4a5c-820c-0d93fe57a3bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e15e2b01-ed3b-4f64-85aa-cff9796b62f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_932663d3-61e8-4a5c-820c-0d93fe57a3bf" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e15e2b01-ed3b-4f64-85aa-cff9796b62f9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e15e2b01-ed3b-4f64-85aa-cff9796b62f9" xlink:to="loc_dei_LegalEntityAxis_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18" xlink:to="loc_dei_EntityDomain_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_33be73a0-fda0-4f2f-be80-d495f02ee359" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2b5e68cd-0f5b-44b6-bc07-6fda75c62e18" xlink:to="loc_dei_EntityDomain_33be73a0-fda0-4f2f-be80-d495f02ee359" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f201c193-4f59-4ba0-b60a-855b7e35f936" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_33be73a0-fda0-4f2f-be80-d495f02ee359" xlink:to="loc_aal_AmericanAirlinesIncMember_f201c193-4f59-4ba0-b60a-855b7e35f936" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_e15e2b01-ed3b-4f64-85aa-cff9796b62f9" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5" xlink:to="loc_us-gaap_EquityComponentDomain_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_be3c2cb0-c02b-4141-87ae-1eee1f0fa01d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_8e034aea-4a1f-4d01-9d01-f2d537ab0bf5" xlink:to="loc_us-gaap_EquityComponentDomain_be3c2cb0-c02b-4141-87ae-1eee1f0fa01d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_988046f8-5e88-4fba-bf9c-d5a79c38cc0b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_be3c2cb0-c02b-4141-87ae-1eee1f0fa01d" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_988046f8-5e88-4fba-bf9c-d5a79c38cc0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_774591cb-6d43-4697-ba60-dbd987f53844" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_be3c2cb0-c02b-4141-87ae-1eee1f0fa01d" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_774591cb-6d43-4697-ba60-dbd987f53844" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:href="aal-20231231.xsd#aal_AociBeforeTaxAttributableToParentRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_932663d3-61e8-4a5c-820c-0d93fe57a3bf" xlink:to="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociBeforeTaxAttributableToParent_50f74fff-c0f7-4fda-8193-8dc1b0e1e2f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:to="loc_us-gaap_AociBeforeTaxAttributableToParent_50f74fff-c0f7-4fda-8193-8dc1b0e1e2f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_db1ef45b-fcfb-43ab-955d-a92de355d511" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_db1ef45b-fcfb-43ab-955d-a92de355d511" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_6b703db4-a3a0-4bc5-9d0f-fea7c9588028" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_6b703db4-a3a0-4bc5-9d0f-fea7c9588028" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_f432d4a6-97b8-46e4-a499-83daa2fb717c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_b85716d2-b379-4669-82b9-f2bd974e5441" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_f432d4a6-97b8-46e4-a499-83daa2fb717c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociBeforeTaxAttributableToParent_631e37fc-d7f4-4189-be6e-e3dc5d71c358" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociBeforeTaxAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:href="aal-20231231.xsd#aal_AociTaxAttributableToParentRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_932663d3-61e8-4a5c-820c-0d93fe57a3bf" xlink:to="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociTaxAttributableToParent_65f82cb7-423e-4072-ae7c-0de2498ff304" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:to="loc_us-gaap_AociTaxAttributableToParent_65f82cb7-423e-4072-ae7c-0de2498ff304" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_a0a5a702-dc3c-4ce6-9832-7b73fc1794f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_a0a5a702-dc3c-4ce6-9832-7b73fc1794f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0dec1206-4283-46d5-9688-bcbac11f1fc5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_0dec1206-4283-46d5-9688-bcbac11f1fc5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_5b2d175a-9b63-44f3-b1ae-ba961eb971b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_170ab024-12e9-4bf2-9734-57090ac836ea" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_5b2d175a-9b63-44f3-b1ae-ba961eb971b7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociTaxAttributableToParent_b3d97963-8fe0-4e09-adf8-12adf1d36dbd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociTaxAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_932663d3-61e8-4a5c-820c-0d93fe57a3bf" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_9a0d2a49-00fb-482a-9d8d-199c57d0a543" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_9a0d2a49-00fb-482a-9d8d-199c57d0a543" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_d85b995b-edf0-460e-9a05-49a4c31617a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_d85b995b-edf0-460e-9a05-49a4c31617a2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_a16cad54-4472-4b1b-a150-09145a532ad5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_a16cad54-4472-4b1b-a150-09145a532ad5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_000d886b-ddb4-4f25-b88a-42e203a450fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_76d5785f-55d3-4cb2-abc8-8af17811b7d6" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_000d886b-ddb4-4f25-b88a-42e203a450fc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_e9ad7a22-729b-49d1-89ca-498bd0fcb44e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveLossReclassificationsoutofAOCIDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#AccumulatedOtherComprehensiveLossReclassificationsoutofAOCIDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveLossReclassificationsoutofAOCIDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_448dc710-c557-4311-ba02-5ae4c6fdd321" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_414a3524-bcb1-4472-aba4-5460a40587a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_448dc710-c557-4311-ba02-5ae4c6fdd321" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_414a3524-bcb1-4472-aba4-5460a40587a7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_aac1fb31-c9d5-4e80-89b9-b748257cf964" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_414a3524-bcb1-4472-aba4-5460a40587a7" xlink:to="loc_dei_LegalEntityAxis_aac1fb31-c9d5-4e80-89b9-b748257cf964" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_aac1fb31-c9d5-4e80-89b9-b748257cf964_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_aac1fb31-c9d5-4e80-89b9-b748257cf964" xlink:to="loc_dei_EntityDomain_aac1fb31-c9d5-4e80-89b9-b748257cf964_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_275175ec-44f7-41d3-84b3-e24b4bb3b8ef" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_aac1fb31-c9d5-4e80-89b9-b748257cf964" xlink:to="loc_dei_EntityDomain_275175ec-44f7-41d3-84b3-e24b4bb3b8ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_0eafb0fd-63db-480a-9383-30c27cd9a944" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_275175ec-44f7-41d3-84b3-e24b4bb3b8ef" xlink:to="loc_aal_AmericanAirlinesIncMember_0eafb0fd-63db-480a-9383-30c27cd9a944" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_f591e5e5-ff46-4330-91f4-337f7c1e5489" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_414a3524-bcb1-4472-aba4-5460a40587a7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_f591e5e5-ff46-4330-91f4-337f7c1e5489" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_f591e5e5-ff46-4330-91f4-337f7c1e5489_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_f591e5e5-ff46-4330-91f4-337f7c1e5489" xlink:to="loc_us-gaap_EquityComponentDomain_f591e5e5-ff46-4330-91f4-337f7c1e5489_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_52c8dc08-4681-4e10-8cb2-973895db4e73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_f591e5e5-ff46-4330-91f4-337f7c1e5489" xlink:to="loc_us-gaap_EquityComponentDomain_52c8dc08-4681-4e10-8cb2-973895db4e73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_2944a518-4648-4a50-a6cc-9b92417268e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_52c8dc08-4681-4e10-8cb2-973895db4e73" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_2944a518-4648-4a50-a6cc-9b92417268e0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_66abda18-ae0d-49c1-b241-66300f487864" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_52c8dc08-4681-4e10-8cb2-973895db4e73" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_66abda18-ae0d-49c1-b241-66300f487864" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_0a4dd97f-3c09-402f-8a40-fc2d4dd81ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_448dc710-c557-4311-ba02-5ae4c6fdd321" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_0a4dd97f-3c09-402f-8a40-fc2d4dd81ddd" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesAircraftEngineandOtherPurchaseCommitmentsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#CommitmentsContingenciesandGuaranteesAircraftEngineandOtherPurchaseCommitmentsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesAircraftEngineandOtherPurchaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_de354c97-3266-4e1f-9dee-3bca379c0cee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_de354c97-3266-4e1f-9dee-3bca379c0cee" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_b8bbce88-94f3-4d92-b4d7-9f66e5862e31" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:to="loc_dei_LegalEntityAxis_b8bbce88-94f3-4d92-b4d7-9f66e5862e31" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_b8bbce88-94f3-4d92-b4d7-9f66e5862e31_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_b8bbce88-94f3-4d92-b4d7-9f66e5862e31" xlink:to="loc_dei_EntityDomain_b8bbce88-94f3-4d92-b4d7-9f66e5862e31_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_4caf0579-4a91-45b9-8a64-2dba12f29607" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_b8bbce88-94f3-4d92-b4d7-9f66e5862e31" xlink:to="loc_dei_EntityDomain_4caf0579-4a91-45b9-8a64-2dba12f29607" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_239be5d2-9c0b-46bb-afee-db8391a2164d" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_4caf0579-4a91-45b9-8a64-2dba12f29607" xlink:to="loc_aal_AmericanAirlinesIncMember_239be5d2-9c0b-46bb-afee-db8391a2164d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_419ff94f-ce52-4ee1-9313-536597d09a66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_4ccb5b4a-bdd2-4e81-8ba9-5cd395a2706e" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_419ff94f-ce52-4ee1-9313-536597d09a66" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AircraftAndEngineCommitmentsMember_a0ed1a31-f772-4071-915d-a074aa2f565e" xlink:href="aal-20231231.xsd#aal_AircraftAndEngineCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_419ff94f-ce52-4ee1-9313-536597d09a66" xlink:to="loc_aal_AircraftAndEngineCommitmentsMember_a0ed1a31-f772-4071-915d-a074aa2f565e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_655a27a6-070f-4530-bccd-a8f553e550fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_655a27a6-070f-4530-bccd-a8f553e550fa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_655a27a6-070f-4530-bccd-a8f553e550fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_655a27a6-070f-4530-bccd-a8f553e550fa" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_655a27a6-070f-4530-bccd-a8f553e550fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_c2ea3d69-e6f0-4d5d-a3f3-026e42de52ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_655a27a6-070f-4530-bccd-a8f553e550fa" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_c2ea3d69-e6f0-4d5d-a3f3-026e42de52ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AircraftFuelFlightEquipmentMaintenanceAndInformationTechnologySupportMember_ce138a4a-9351-42a8-930e-138c2eaafdcf" xlink:href="aal-20231231.xsd#aal_AircraftFuelFlightEquipmentMaintenanceAndInformationTechnologySupportMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_c2ea3d69-e6f0-4d5d-a3f3-026e42de52ed" xlink:to="loc_aal_AircraftFuelFlightEquipmentMaintenanceAndInformationTechnologySupportMember_ce138a4a-9351-42a8-930e-138c2eaafdcf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeAxis_81c626c4-31ec-4f8b-84f2-21710e8c07f9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_f13ef548-1793-40c7-85c1-9261804dbd0a" xlink:to="loc_srt_AircraftTypeAxis_81c626c4-31ec-4f8b-84f2-21710e8c07f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeMember_81c626c4-31ec-4f8b-84f2-21710e8c07f9_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_AircraftTypeAxis_81c626c4-31ec-4f8b-84f2-21710e8c07f9" xlink:to="loc_srt_AircraftTypeMember_81c626c4-31ec-4f8b-84f2-21710e8c07f9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AircraftTypeMember_877711b7-d0af-43cf-b3e3-e976e23df184" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AircraftTypeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_AircraftTypeAxis_81c626c4-31ec-4f8b-84f2-21710e8c07f9" xlink:to="loc_srt_AircraftTypeMember_877711b7-d0af-43cf-b3e3-e976e23df184" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_B7879Member_d1839404-c792-4073-83c9-43edb083233b" xlink:href="aal-20231231.xsd#aal_B7879Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_AircraftTypeMember_877711b7-d0af-43cf-b3e3-e976e23df184" xlink:to="loc_aal_B7879Member_d1839404-c792-4073-83c9-43edb083233b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationFiscalYearMaturityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_de354c97-3266-4e1f-9dee-3bca379c0cee" xlink:to="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_02259a5d-2aaa-43ca-b5f5-93f979685386" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_02259a5d-2aaa-43ca-b5f5-93f979685386" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInSecondYear_4339f373-b1ea-4f77-a272-31464afd1363" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInSecondYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueInSecondYear_4339f373-b1ea-4f77-a272-31464afd1363" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInThirdYear_b5187463-e1c7-4771-b1d8-feec83e1a159" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInThirdYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueInThirdYear_b5187463-e1c7-4771-b1d8-feec83e1a159" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInFourthYear_0f41ae0b-986f-4626-aa65-0d900f2ea854" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInFourthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueInFourthYear_0f41ae0b-986f-4626-aa65-0d900f2ea854" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInFifthYear_7fdcc129-83aa-4a78-b6f9-cd3084d19d30" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInFifthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueInFifthYear_7fdcc129-83aa-4a78-b6f9-cd3084d19d30" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueAfterFifthYear_7c5b0b63-ab4d-4106-98db-fbc7cc7c6667" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueAfterFifthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligationDueAfterFifthYear_7c5b0b63-ab4d-4106-98db-fbc7cc7c6667" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_7c39a271-d833-462a-99d1-ca60ff85db67" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_PurchaseObligation_7c39a271-d833-462a-99d1-ca60ff85db67" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepositsOnFlightEquipment_aa46e681-c76a-4f87-8f65-88642d7a4517" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepositsOnFlightEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_us-gaap_DepositsOnFlightEquipment_aa46e681-c76a-4f87-8f65-88642d7a4517" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfAircraftsDeferrableScheduledToBeDeliveredPeriodOne_21265843-3f5b-4aca-8e11-11803330db6b" xlink:href="aal-20231231.xsd#aal_NumberOfAircraftsDeferrableScheduledToBeDeliveredPeriodOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PurchaseObligationFiscalYearMaturityAbstract_3a240304-af8b-4131-ac00-f2fb7c931dcc" xlink:to="loc_aal_NumberOfAircraftsDeferrableScheduledToBeDeliveredPeriodOne_21265843-3f5b-4aca-8e11-11803330db6b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_de354c97-3266-4e1f-9dee-3bca379c0cee" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_9e73648c-d3c3-4cc5-b152-8dbc1f266637" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_9e73648c-d3c3-4cc5-b152-8dbc1f266637" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_958e10e1-e26d-4b2f-b8ee-997de45826e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_958e10e1-e26d-4b2f-b8ee-997de45826e0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7fce7e1d-0f50-4358-9548-69f5ca19fb23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_7fce7e1d-0f50-4358-9548-69f5ca19fb23" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_215bdeee-49d3-4c1d-9e2f-47e1da32ddfa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_215bdeee-49d3-4c1d-9e2f-47e1da32ddfa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_c305f2eb-565e-40ca-8048-257d44f7d51e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary_c305f2eb-565e-40ca-8048-257d44f7d51e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_a792757c-5d0f-4cd3-a9bd-839966e257a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationAbstract_8d836a3c-8342-40d9-a581-dd1e9b3cc2d4" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationDueAfterFiveYears_a792757c-5d0f-4cd3-a9bd-839966e257a3" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesCapacityPurchaseAgreementsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#CommitmentsContingenciesandGuaranteesCapacityPurchaseAgreementsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesCapacityPurchaseAgreementsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_090005d8-5a91-449b-b8fe-0fe7334b0c37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_090005d8-5a91-449b-b8fe-0fe7334b0c37" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_929b231b-ed9d-46e6-9d80-07642557994b" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_090005d8-5a91-449b-b8fe-0fe7334b0c37" xlink:to="loc_dei_LegalEntityAxis_929b231b-ed9d-46e6-9d80-07642557994b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_929b231b-ed9d-46e6-9d80-07642557994b_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_929b231b-ed9d-46e6-9d80-07642557994b" xlink:to="loc_dei_EntityDomain_929b231b-ed9d-46e6-9d80-07642557994b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_3c1292d5-641b-4daa-979c-82978f6c7546" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_929b231b-ed9d-46e6-9d80-07642557994b" xlink:to="loc_dei_EntityDomain_3c1292d5-641b-4daa-979c-82978f6c7546" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_f865098f-51e2-409c-a38f-699b30ebd558" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_3c1292d5-641b-4daa-979c-82978f6c7546" xlink:to="loc_aal_AmericanAirlinesIncMember_f865098f-51e2-409c-a38f-699b30ebd558" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_a99f2929-f36d-4644-96a4-8cf95bc32a80" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_090005d8-5a91-449b-b8fe-0fe7334b0c37" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_a99f2929-f36d-4644-96a4-8cf95bc32a80" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_a99f2929-f36d-4644-96a4-8cf95bc32a80_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_a99f2929-f36d-4644-96a4-8cf95bc32a80" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_a99f2929-f36d-4644-96a4-8cf95bc32a80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_6795a117-54c0-47ff-a8d7-f89962620ef5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_a99f2929-f36d-4644-96a4-8cf95bc32a80" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_6795a117-54c0-47ff-a8d7-f89962620ef5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_56fea6db-65d6-4412-ada8-a0ecf9354704" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_6795a117-54c0-47ff-a8d7-f89962620ef5" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_56fea6db-65d6-4412-ada8-a0ecf9354704" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ReimbursementReceivablePercentageUnderAgreement_3b018540-8178-4f6a-8017-af03994422b2" xlink:href="aal-20231231.xsd#aal_ReimbursementReceivablePercentageUnderAgreement"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_aal_ReimbursementReceivablePercentageUnderAgreement_3b018540-8178-4f6a-8017-af03994422b2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_f2cbf287-df7b-4f8d-b007-54857d8bb34f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_f2cbf287-df7b-4f8d-b007-54857d8bb34f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInSecondYear_02e36425-89b4-43fc-9371-14ff8f14d992" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInSecondYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueInSecondYear_02e36425-89b4-43fc-9371-14ff8f14d992" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInThirdYear_4b06cea7-fb03-4cd2-a0ac-521b87f48c2d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInThirdYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueInThirdYear_4b06cea7-fb03-4cd2-a0ac-521b87f48c2d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInFourthYear_49f56afd-6ef6-47cf-b748-4f9761c45e8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInFourthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueInFourthYear_49f56afd-6ef6-47cf-b748-4f9761c45e8e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueInFifthYear_404cdf7b-162b-4962-a51e-e3acad2219d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueInFifthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueInFifthYear_404cdf7b-162b-4962-a51e-e3acad2219d9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligationDueAfterFifthYear_ad4b8740-5d44-4775-ac5f-68c82f926f28" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligationDueAfterFifthYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligationDueAfterFifthYear_ad4b8740-5d44-4775-ac5f-68c82f926f28" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PurchaseObligation_a35887ec-8b79-4735-8b5f-b7d40c8e077a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PurchaseObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_19144043-4214-4eac-a3de-cb9eea4101fc" xlink:to="loc_us-gaap_PurchaseObligation_a35887ec-8b79-4735-8b5f-b7d40c8e077a" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#CommitmentsContingenciesandGuaranteesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesandGuaranteesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermPurchaseCommitmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_2843d35b-0951-497b-8f43-f58a4761b423" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_dei_LegalEntityAxis_2843d35b-0951-497b-8f43-f58a4761b423" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2843d35b-0951-497b-8f43-f58a4761b423_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_2843d35b-0951-497b-8f43-f58a4761b423" xlink:to="loc_dei_EntityDomain_2843d35b-0951-497b-8f43-f58a4761b423_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_faf55456-8986-484b-9dd2-41e1bbb4c81f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_2843d35b-0951-497b-8f43-f58a4761b423" xlink:to="loc_dei_EntityDomain_faf55456-8986-484b-9dd2-41e1bbb4c81f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_2a3c000b-6366-4a15-bfa8-6bf869271097" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_faf55456-8986-484b-9dd2-41e1bbb4c81f" xlink:to="loc_aal_AmericanAirlinesIncMember_2a3c000b-6366-4a15-bfa8-6bf869271097" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_12a3dccf-fdbf-4e42-9291-d367e2a73b55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_DebtInstrumentAxis_12a3dccf-fdbf-4e42-9291-d367e2a73b55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_12a3dccf-fdbf-4e42-9291-d367e2a73b55_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_12a3dccf-fdbf-4e42-9291-d367e2a73b55" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_12a3dccf-fdbf-4e42-9291-d367e2a73b55_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_12a3dccf-fdbf-4e42-9291-d367e2a73b55" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_625ba82a-0b1f-4abd-b587-5bc866ca3275" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_625ba82a-0b1f-4abd-b587-5bc866ca3275" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_3a3cfbf4-e70e-462e-ae0d-ffc93aa371da" xlink:href="aal-20231231.xsd#aal_SpecialFacilityRevenueBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_3a3cfbf4-e70e-462e-ae0d-ffc93aa371da" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_83579450-0961-45dc-9e45-ed7bf04e4fd9" xlink:href="aal-20231231.xsd#aal_PayrollSupportProgramPromissoryNoteOneCARESActMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:to="loc_aal_PayrollSupportProgramPromissoryNoteOneCARESActMember_83579450-0961-45dc-9e45-ed7bf04e4fd9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SeniorNote375Matures2025Member_0e403877-95b4-4d69-9059-6fb7ef145b05" xlink:href="aal-20231231.xsd#aal_SeniorNote375Matures2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:to="loc_aal_SeniorNote375Matures2025Member_0e403877-95b4-4d69-9059-6fb7ef145b05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ConvertibleSeniorNotes650Due2025Member_db723616-e61c-4971-a723-be7ce67d428b" xlink:href="aal-20231231.xsd#aal_ConvertibleSeniorNotes650Due2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c7f7f734-982f-4795-b3a0-f77868940167" xlink:to="loc_aal_ConvertibleSeniorNotes650Due2025Member_db723616-e61c-4971-a723-be7ce67d428b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6f206c03-b297-4954-85b2-6043ca38ef3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_6f206c03-b297-4954-85b2-6043ca38ef3e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6f206c03-b297-4954-85b2-6043ca38ef3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6f206c03-b297-4954-85b2-6043ca38ef3e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6f206c03-b297-4954-85b2-6043ca38ef3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_d4644144-382a-47d3-ac3a-65cb19d63104" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6f206c03-b297-4954-85b2-6043ca38ef3e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_d4644144-382a-47d3-ac3a-65cb19d63104" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredDebtMember_6a4171d5-b7bd-411e-b3bf-300f20712197" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d4644144-382a-47d3-ac3a-65cb19d63104" xlink:to="loc_us-gaap_SecuredDebtMember_6a4171d5-b7bd-411e-b3bf-300f20712197" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnsecuredDebtMember_eed400a5-6734-4229-9909-d609543ac1de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnsecuredDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_d4644144-382a-47d3-ac3a-65cb19d63104" xlink:to="loc_us-gaap_UnsecuredDebtMember_eed400a5-6734-4229-9909-d609543ac1de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermAxis_a011786b-ca11-4ef5-9c64-3dd2e7895e7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseContractualTermAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_LeaseContractualTermAxis_a011786b-ca11-4ef5-9c64-3dd2e7895e7f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_a011786b-ca11-4ef5-9c64-3dd2e7895e7f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseContractualTermAxis_a011786b-ca11-4ef5-9c64-3dd2e7895e7f" xlink:to="loc_us-gaap_LeaseContractualTermDomain_a011786b-ca11-4ef5-9c64-3dd2e7895e7f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseContractualTermDomain_5f8ef365-c06a-409a-b48d-9a5fc4430988" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseContractualTermDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseContractualTermAxis_a011786b-ca11-4ef5-9c64-3dd2e7895e7f" xlink:to="loc_us-gaap_LeaseContractualTermDomain_5f8ef365-c06a-409a-b48d-9a5fc4430988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_1bbd6689-d93f-404a-a35e-8aa3c6581c25" xlink:href="aal-20231231.xsd#aal_SpecialFacilityRevenueBondsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseContractualTermDomain_5f8ef365-c06a-409a-b48d-9a5fc4430988" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_1bbd6689-d93f-404a-a35e-8aa3c6581c25" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_51ea0b1d-c487-489f-9d9f-1bb036b56321" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_srt_ProductOrServiceAxis_51ea0b1d-c487-489f-9d9f-1bb036b56321" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_51ea0b1d-c487-489f-9d9f-1bb036b56321_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_51ea0b1d-c487-489f-9d9f-1bb036b56321" xlink:to="loc_srt_ProductsAndServicesDomain_51ea0b1d-c487-489f-9d9f-1bb036b56321_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_36d6bce0-5ec2-49d3-9941-8b7310fef6dc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_51ea0b1d-c487-489f-9d9f-1bb036b56321" xlink:to="loc_srt_ProductsAndServicesDomain_36d6bce0-5ec2-49d3-9941-8b7310fef6dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegionalCarrierMember_79973b73-67bc-48f3-be96-f17593c6027c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RegionalCarrierMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_36d6bce0-5ec2-49d3-9941-8b7310fef6dc" xlink:to="loc_us-gaap_RegionalCarrierMember_79973b73-67bc-48f3-be96-f17593c6027c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1b880e19-8cc7-4446-8d3e-54274077bb42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1b880e19-8cc7-4446-8d3e-54274077bb42" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1b880e19-8cc7-4446-8d3e-54274077bb42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1b880e19-8cc7-4446-8d3e-54274077bb42" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1b880e19-8cc7-4446-8d3e-54274077bb42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_36e2ee63-f522-4995-adca-8df19c500853" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_1b880e19-8cc7-4446-8d3e-54274077bb42" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_36e2ee63-f522-4995-adca-8df19c500853" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_0d55575c-0e65-4a47-a141-e6721a0996c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_36e2ee63-f522-4995-adca-8df19c500853" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_0d55575c-0e65-4a47-a141-e6721a0996c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_00d88e03-c59e-438a-9b49-2331ba7ba83f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_00d88e03-c59e-438a-9b49-2331ba7ba83f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_00d88e03-c59e-438a-9b49-2331ba7ba83f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_00d88e03-c59e-438a-9b49-2331ba7ba83f" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_00d88e03-c59e-438a-9b49-2331ba7ba83f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_8ea7d873-119e-4e24-8a37-a94d9e17fd75" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis_00d88e03-c59e-438a-9b49-2331ba7ba83f" xlink:to="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_8ea7d873-119e-4e24-8a37-a94d9e17fd75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LAXModernizationProjectMember_3d7369d2-e0b1-4b8e-ab4f-bdfe2ed08816" xlink:href="aal-20231231.xsd#aal_LAXModernizationProjectMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RealEstateAndAccumulatedDepreciationNameOfPropertyDomain_8ea7d873-119e-4e24-8a37-a94d9e17fd75" xlink:to="loc_aal_LAXModernizationProjectMember_3d7369d2-e0b1-4b8e-ab4f-bdfe2ed08816" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderlyingAssetClassAxis_909c1730-c1e8-4bc0-b95a-b7f279cdaba0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnderlyingAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_UnderlyingAssetClassAxis_909c1730-c1e8-4bc0-b95a-b7f279cdaba0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderlyingAssetClassDomain_909c1730-c1e8-4bc0-b95a-b7f279cdaba0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnderlyingAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnderlyingAssetClassAxis_909c1730-c1e8-4bc0-b95a-b7f279cdaba0" xlink:to="loc_us-gaap_UnderlyingAssetClassDomain_909c1730-c1e8-4bc0-b95a-b7f279cdaba0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnderlyingAssetClassDomain_7e281b95-7c69-43cd-8974-31758cfde5a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnderlyingAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnderlyingAssetClassAxis_909c1730-c1e8-4bc0-b95a-b7f279cdaba0" xlink:to="loc_us-gaap_UnderlyingAssetClassDomain_7e281b95-7c69-43cd-8974-31758cfde5a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_RestrictedCashMember_6da991f0-7cdf-43bb-945a-bfcd238d3914" xlink:href="aal-20231231.xsd#aal_RestrictedCashMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnderlyingAssetClassDomain_7e281b95-7c69-43cd-8974-31758cfde5a5" xlink:to="loc_aal_RestrictedCashMember_6da991f0-7cdf-43bb-945a-bfcd238d3914" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_ccd83df9-575a-421b-b304-08500e98e727" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_srt_LitigationCaseAxis_ccd83df9-575a-421b-b304-08500e98e727" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_ccd83df9-575a-421b-b304-08500e98e727_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_ccd83df9-575a-421b-b304-08500e98e727" xlink:to="loc_srt_LitigationCaseTypeDomain_ccd83df9-575a-421b-b304-08500e98e727_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_c3b9c78a-0948-4210-9871-1f2874156933" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_ccd83df9-575a-421b-b304-08500e98e727" xlink:to="loc_srt_LitigationCaseTypeDomain_c3b9c78a-0948-4210-9871-1f2874156933" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PrivatePartyAntitrustActionsRelatedToTheNortheastAllianceMember_6fcfd249-b992-4f7e-8ace-22285ccf1a42" xlink:href="aal-20231231.xsd#aal_PrivatePartyAntitrustActionsRelatedToTheNortheastAllianceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_c3b9c78a-0948-4210-9871-1f2874156933" xlink:to="loc_aal_PrivatePartyAntitrustActionsRelatedToTheNortheastAllianceMember_6fcfd249-b992-4f7e-8ace-22285ccf1a42" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_ffe3832a-3ec8-4fd0-90e3-24899bd0ed72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_ad4d75d8-34e5-4d97-bcda-3142faf3f4e9" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_ffe3832a-3ec8-4fd0-90e3-24899bd0ed72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_e3bc8ea5-4451-4634-b613-650c1c1a4b93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_ffe3832a-3ec8-4fd0-90e3-24899bd0ed72" xlink:to="loc_us-gaap_SubsequentEventMember_e3bc8ea5-4451-4634-b613-650c1c1a4b93" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_036d5bb0-58ac-4c93-9027-20b7d2c165a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_036d5bb0-58ac-4c93-9027-20b7d2c165a7" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_036d5bb0-58ac-4c93-9027-20b7d2c165a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_036d5bb0-58ac-4c93-9027-20b7d2c165a7" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_036d5bb0-58ac-4c93-9027-20b7d2c165a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_23e1f0ea-53f3-45bb-aa78-2033fddb62a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_036d5bb0-58ac-4c93-9027-20b7d2c165a7" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_23e1f0ea-53f3-45bb-aa78-2033fddb62a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember_40322832-bd0e-4732-981e-5b56869897ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_23e1f0ea-53f3-45bb-aa78-2033fddb62a9" xlink:to="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsMember_40322832-bd0e-4732-981e-5b56869897ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember_57ee1231-8d3d-46c3-9a75-4434507c7a73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_23e1f0ea-53f3-45bb-aa78-2033fddb62a9" xlink:to="loc_us-gaap_WorkforceSubjectToCollectiveBargainingArrangementsExpiringWithinOneYearMember_57ee1231-8d3d-46c3-9a75-4434507c7a73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_6296c02c-52c9-4c17-a966-d96b951b2e1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_5fbc5831-af5b-4f44-bdf5-a11d7bf9ab99" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_6296c02c-52c9-4c17-a966-d96b951b2e1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnionizedEmployeesConcentrationRiskMember_29b5f036-ae37-49e1-9f14-328c928e2384" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnionizedEmployeesConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_6296c02c-52c9-4c17-a966-d96b951b2e1d" xlink:to="loc_us-gaap_UnionizedEmployeesConcentrationRiskMember_29b5f036-ae37-49e1-9f14-328c928e2384" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementAxis_dd0d29a5-ae0c-42ab-a8a8-60727b109044" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_0fbb983d-a726-4e0f-83e3-08f02c984b97" xlink:to="loc_us-gaap_CollectiveBargainingArrangementAxis_dd0d29a5-ae0c-42ab-a8a8-60727b109044" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementDomain_dd0d29a5-ae0c-42ab-a8a8-60727b109044_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollectiveBargainingArrangementAxis_dd0d29a5-ae0c-42ab-a8a8-60727b109044" xlink:to="loc_us-gaap_CollectiveBargainingArrangementDomain_dd0d29a5-ae0c-42ab-a8a8-60727b109044_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollectiveBargainingArrangementDomain_4d348b84-3ba0-4a65-9028-fe6bdc8d26d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollectiveBargainingArrangementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollectiveBargainingArrangementAxis_dd0d29a5-ae0c-42ab-a8a8-60727b109044" xlink:to="loc_us-gaap_CollectiveBargainingArrangementDomain_4d348b84-3ba0-4a65-9028-fe6bdc8d26d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AlliedPilotsAssociationMember_f8884adf-d20d-497b-ab24-d4f11e9b8327" xlink:href="aal-20231231.xsd#aal_AlliedPilotsAssociationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollectiveBargainingArrangementDomain_4d348b84-3ba0-4a65-9028-fe6bdc8d26d1" xlink:to="loc_aal_AlliedPilotsAssociationMember_f8884adf-d20d-497b-ab24-d4f11e9b8327" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CWAIBTMember_5872ebb6-e3cf-40c2-b8b1-c9fb1ae0152c" xlink:href="aal-20231231.xsd#aal_CWAIBTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollectiveBargainingArrangementDomain_4d348b84-3ba0-4a65-9028-fe6bdc8d26d1" xlink:to="loc_aal_CWAIBTMember_5872ebb6-e3cf-40c2-b8b1-c9fb1ae0152c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PropertyPlantEquipmentExpectedCost_0c5e24f0-2634-417c-b662-e2f063229f6b" xlink:href="aal-20231231.xsd#aal_PropertyPlantEquipmentExpectedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_PropertyPlantEquipmentExpectedCost_0c5e24f0-2634-417c-b662-e2f063229f6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AirportRedevelopmentNumberOfSecurityScreenLanes_7682fe36-1a77-4fd1-b8d7-c72fbdddc9c3" xlink:href="aal-20231231.xsd#aal_AirportRedevelopmentNumberOfSecurityScreenLanes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_AirportRedevelopmentNumberOfSecurityScreenLanes_7682fe36-1a77-4fd1-b8d7-c72fbdddc9c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PropertyPlantEquipmentCostIncurredToDate_a45fdffa-5a59-460e-8472-c275e06545b3" xlink:href="aal-20231231.xsd#aal_PropertyPlantEquipmentCostIncurredToDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_PropertyPlantEquipmentCostIncurredToDate_a45fdffa-5a59-460e-8472-c275e06545b3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PropertyPlantEquipmentIncurredCost_6f8ca5a8-093a-4587-b9f4-aa6a53741f50" xlink:href="aal-20231231.xsd#aal_PropertyPlantEquipmentIncurredCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_PropertyPlantEquipmentIncurredCost_6f8ca5a8-093a-4587-b9f4-aa6a53741f50" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_PropertyPlantAndEquipmentAccumulatedDisposals_9ac90d15-ccaf-4186-87bc-5e304159dff9" xlink:href="aal-20231231.xsd#aal_PropertyPlantAndEquipmentAccumulatedDisposals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_PropertyPlantAndEquipmentAccumulatedDisposals_9ac90d15-ccaf-4186-87bc-5e304159dff9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisposals_f6b78165-abb8-4ba5-bd6f-effa8bd0dba8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentDisposals"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentDisposals_f6b78165-abb8-4ba5-bd6f-effa8bd0dba8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_ProceedsFromPrepaymentForConstruction_718ee01a-382a-4046-b857-e1d97421f9d5" xlink:href="aal-20231231.xsd#aal_ProceedsFromPrepaymentForConstruction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_ProceedsFromPrepaymentForConstruction_718ee01a-382a-4046-b857-e1d97421f9d5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate_19788192-ee78-4766-bf0d-1c176be88cc2" xlink:href="aal-20231231.xsd#aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate_19788192-ee78-4766-bf0d-1c176be88cc2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfSpareAircraftEnginesOwnedEnhancedEquipmentTrustCertificate_d69ee091-2ca3-41f3-9daf-ca507ec22bea" xlink:href="aal-20231231.xsd#aal_NumberOfSpareAircraftEnginesOwnedEnhancedEquipmentTrustCertificate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_NumberOfSpareAircraftEnginesOwnedEnhancedEquipmentTrustCertificate_d69ee091-2ca3-41f3-9daf-ca507ec22bea" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_99ce4c46-a529-42a5-861a-4aaf2cde3e46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_99ce4c46-a529-42a5-861a-4aaf2cde3e46" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_LettersofCreditOutstandingandSuretyBondsAmount_de94959c-c29f-41f8-8dd6-4dea944a551d" xlink:href="aal-20231231.xsd#aal_LettersofCreditOutstandingandSuretyBondsAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_LettersofCreditOutstandingandSuretyBondsAmount_de94959c-c29f-41f8-8dd6-4dea944a551d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfPrivatePartyPlaintiffsWhoFiledPutativeClassAction_aa0cf561-1f15-40aa-8da9-8044839df29e" xlink:href="aal-20231231.xsd#aal_NumberOfPrivatePartyPlaintiffsWhoFiledPutativeClassAction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_NumberOfPrivatePartyPlaintiffsWhoFiledPutativeClassAction_aa0cf561-1f15-40aa-8da9-8044839df29e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_NumberOfAdditionalPutativeClassActionLawsuits_8d2fba05-b583-40f2-bd75-172ba67ceaee" xlink:href="aal-20231231.xsd#aal_NumberOfAdditionalPutativeClassActionLawsuits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_NumberOfAdditionalPutativeClassActionLawsuits_8d2fba05-b583-40f2-bd75-172ba67ceaee" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_2643b6da-11e2-4cfd-8b49-e6ac0005a1da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GuaranteeObligationsMaximumExposure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_2643b6da-11e2-4cfd-8b49-e6ac0005a1da" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_20e1342b-4382-485e-bdd7-3766ece818db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_OperatingLeaseLiability_20e1342b-4382-485e-bdd7-3766ece818db" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2aecfda8-18ab-4376-bcc4-a5a7f904eceb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_2aecfda8-18ab-4376-bcc4-a5a7f904eceb" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementTerm_0351b558-8b4e-47ac-b696-510b55118e31" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementTerm"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_CollectiveBargainingAgreementTerm_0351b558-8b4e-47ac-b696-510b55118e31" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementInitialRateIncreasePercent_bb07344b-8952-4d24-b43e-9d7c22766542" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementInitialRateIncreasePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_CollectiveBargainingAgreementInitialRateIncreasePercent_bb07344b-8952-4d24-b43e-9d7c22766542" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementOneTimePaymentAmount_ad8e439e-50b3-42b7-9ac3-97c3adab2d31" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementOneTimePaymentAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_CollectiveBargainingAgreementOneTimePaymentAmount_ad8e439e-50b3-42b7-9ac3-97c3adab2d31" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems_25b40bbb-783f-495c-8082-7bf6c6f690c6" xlink:href="aal-20231231.xsd#aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_aal_CollectiveBargainingAgreementAdjustmentsToOtherBenefitRelatedItems_25b40bbb-783f-495c-8082-7bf6c6f690c6" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityNumberOfEmployees_5bd5582e-6a05-49cf-87da-8883a34a7121" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityNumberOfEmployees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_dei_EntityNumberOfEmployees_5bd5582e-6a05-49cf-87da-8883a34a7121" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_799ed654-1092-4d92-966f-7cbdb0d0592d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_2b7ec121-e6af-4947-bce3-a479a9fea411" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_799ed654-1092-4d92-966f-7cbdb0d0592d" xlink:type="arc" order="21"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#SupplementalCashFlowInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_1341ae22-11f3-4a67-a0ae-bd7055b477b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_b8b21092-1758-4a69-a349-da1ea62d4bca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherSignificantNoncashTransactionsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_1341ae22-11f3-4a67-a0ae-bd7055b477b4" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_b8b21092-1758-4a69-a349-da1ea62d4bca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_9ef3a815-9a58-4557-a0da-97f6b0b22d63" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_b8b21092-1758-4a69-a349-da1ea62d4bca" xlink:to="loc_dei_LegalEntityAxis_9ef3a815-9a58-4557-a0da-97f6b0b22d63" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_9ef3a815-9a58-4557-a0da-97f6b0b22d63_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_9ef3a815-9a58-4557-a0da-97f6b0b22d63" xlink:to="loc_dei_EntityDomain_9ef3a815-9a58-4557-a0da-97f6b0b22d63_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_49867674-6717-40a2-b81a-e7e13b193d6a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_9ef3a815-9a58-4557-a0da-97f6b0b22d63" xlink:to="loc_dei_EntityDomain_49867674-6717-40a2-b81a-e7e13b193d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_a3143199-332d-413b-85fb-b08bb1bb6024" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_49867674-6717-40a2-b81a-e7e13b193d6a" xlink:to="loc_aal_AmericanAirlinesIncMember_a3143199-332d-413b-85fb-b08bb1bb6024" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_1341ae22-11f3-4a67-a0ae-bd7055b477b4" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_5e7a6983-7726-4f07-a04b-8ebbcedf5098" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_5e7a6983-7726-4f07-a04b-8ebbcedf5098" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_6e623b19-8f07-4485-aa01-d23f905772e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CapitalExpendituresIncurredButNotYetPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_us-gaap_CapitalExpendituresIncurredButNotYetPaid_6e623b19-8f07-4485-aa01-d23f905772e3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_FinanceLeaseLiabilityConvertedToOperatingLeaseLiability_21cdb33b-f497-4774-abab-df167ed3a214" xlink:href="aal-20231231.xsd#aal_FinanceLeaseLiabilityConvertedToOperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_aal_FinanceLeaseLiabilityConvertedToOperatingLeaseLiability_21cdb33b-f497-4774-abab-df167ed3a214" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OperatingLeaseLiabilityConvertedToFinanceLeaseLiability_c00ce9a7-730f-41ef-aa9b-f1d2e4bfd91b" xlink:href="aal-20231231.xsd#aal_OperatingLeaseLiabilityConvertedToFinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_aal_OperatingLeaseLiabilityConvertedToFinanceLeaseLiability_c00ce9a7-730f-41ef-aa9b-f1d2e4bfd91b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation_62759b93-f71c-4dcd-8d5b-faf4fcd0533f" xlink:href="aal-20231231.xsd#aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation_62759b93-f71c-4dcd-8d5b-faf4fcd0533f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1_a3703d4e-c446-4b20-a04e-9b18b5eb25c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_68964958-4285-448a-8547-67d1dc6036ad" xlink:to="loc_us-gaap_NoncashOrPartNoncashAcquisitionInvestmentsAcquired1_a3703d4e-c446-4b20-a04e-9b18b5eb25c5" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_f6f56343-2748-4a2f-bff2-b5ce553d148a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SupplementalCashFlowInformationAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_1341ae22-11f3-4a67-a0ae-bd7055b477b4" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_f6f56343-2748-4a2f-bff2-b5ce553d148a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_0d2c8956-14a3-4ba4-9be9-4cc4c43d0944" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_f6f56343-2748-4a2f-bff2-b5ce553d148a" xlink:to="loc_us-gaap_InterestPaidNet_0d2c8956-14a3-4ba4-9be9-4cc4c43d0944" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaid_bbf31e62-54ac-4738-ba25-39c69989840e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxesPaid"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_f6f56343-2748-4a2f-bff2-b5ce553d148a" xlink:to="loc_us-gaap_IncomeTaxesPaid_bbf31e62-54ac-4738-ba25-39c69989840e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsandRelatedDisclosuresDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#OperatingSegmentsandRelatedDisclosuresDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsandRelatedDisclosuresDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_ce117893-bd87-4850-bd4f-34199e4cb21e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9acc8bda-98b1-4cf6-9675-872e81770f43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_ce117893-bd87-4850-bd4f-34199e4cb21e" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9acc8bda-98b1-4cf6-9675-872e81770f43" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_9acc8bda-98b1-4cf6-9675-872e81770f43" xlink:to="loc_dei_LegalEntityAxis_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff" xlink:to="loc_dei_EntityDomain_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_eea72558-375c-4ef9-b232-1f1f2e689bef" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_cb07e4a0-aebd-47ae-ac15-65f72b98f0ff" xlink:to="loc_dei_EntityDomain_eea72558-375c-4ef9-b232-1f1f2e689bef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_1a5e6609-5030-4a0e-8256-e8bd12d14f2c" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_eea72558-375c-4ef9-b232-1f1f2e689bef" xlink:to="loc_aal_AmericanAirlinesIncMember_1a5e6609-5030-4a0e-8256-e8bd12d14f2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfOperatingSegments_d452765d-b4eb-4a7c-a41a-743035dafe88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NumberOfOperatingSegments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_ce117893-bd87-4850-bd4f-34199e4cb21e" xlink:to="loc_us-gaap_NumberOfOperatingSegments_d452765d-b4eb-4a7c-a41a-743035dafe88" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#ShareBasedCompensationAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_06236570-e068-47b5-9e08-8f31c5a9c539" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_06236570-e068-47b5-9e08-8f31c5a9c539" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_f71ac7f0-57c7-4359-b268-f5b1b978234a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_06236570-e068-47b5-9e08-8f31c5a9c539" xlink:to="loc_dei_LegalEntityAxis_f71ac7f0-57c7-4359-b268-f5b1b978234a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f71ac7f0-57c7-4359-b268-f5b1b978234a_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_f71ac7f0-57c7-4359-b268-f5b1b978234a" xlink:to="loc_dei_EntityDomain_f71ac7f0-57c7-4359-b268-f5b1b978234a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_f1557b56-3282-4005-93ac-03243cfd4250" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_f71ac7f0-57c7-4359-b268-f5b1b978234a" xlink:to="loc_dei_EntityDomain_f1557b56-3282-4005-93ac-03243cfd4250" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_8be3c48e-63ef-4d42-bd48-96c04fd115b6" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_f1557b56-3282-4005-93ac-03243cfd4250" xlink:to="loc_aal_AmericanAirlinesIncMember_8be3c48e-63ef-4d42-bd48-96c04fd115b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_919fe922-235e-440b-98d8-b07b581918c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_06236570-e068-47b5-9e08-8f31c5a9c539" xlink:to="loc_us-gaap_PlanNameAxis_919fe922-235e-440b-98d8-b07b581918c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_919fe922-235e-440b-98d8-b07b581918c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_919fe922-235e-440b-98d8-b07b581918c1" xlink:to="loc_us-gaap_PlanNameDomain_919fe922-235e-440b-98d8-b07b581918c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_7062bb57-23cb-4ee9-9382-b98d03610968" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_919fe922-235e-440b-98d8-b07b581918c1" xlink:to="loc_us-gaap_PlanNameDomain_7062bb57-23cb-4ee9-9382-b98d03610968" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_A2023IncentiveAwardPlanMember_5f96fcef-3538-43b8-aab9-0f3713759fde" xlink:href="aal-20231231.xsd#aal_A2023IncentiveAwardPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_7062bb57-23cb-4ee9-9382-b98d03610968" xlink:to="loc_aal_A2023IncentiveAwardPlanMember_5f96fcef-3538-43b8-aab9-0f3713759fde" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9aa15555-bdff-471a-878e-300611dc2231" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9aa15555-bdff-471a-878e-300611dc2231" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_943751d3-e695-4a7d-8971-9d82a88534bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_943751d3-e695-4a7d-8971-9d82a88534bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_0b5e1473-f05a-4c3d-8546-f5b15a44bc64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_0b5e1473-f05a-4c3d-8546-f5b15a44bc64" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_029f90da-8ff6-4751-80ed-eff4ac8ce523" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_b0ee43ad-85e4-43dc-9dbd-1c0495fc0743" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_029f90da-8ff6-4751-80ed-eff4ac8ce523" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationRestrictedStockUnitAwardsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#ShareBasedCompensationRestrictedStockUnitAwardsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationRestrictedStockUnitAwardsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6203f58b-6b09-4ff2-ba1a-923fdee72d27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6203f58b-6b09-4ff2-ba1a-923fdee72d27" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_cc297dbd-555c-435b-97ab-e292e92f865d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6203f58b-6b09-4ff2-ba1a-923fdee72d27" xlink:to="loc_dei_LegalEntityAxis_cc297dbd-555c-435b-97ab-e292e92f865d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_cc297dbd-555c-435b-97ab-e292e92f865d_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_cc297dbd-555c-435b-97ab-e292e92f865d" xlink:to="loc_dei_EntityDomain_cc297dbd-555c-435b-97ab-e292e92f865d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_ef66da1a-6542-489c-9487-45c0667778e7" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_cc297dbd-555c-435b-97ab-e292e92f865d" xlink:to="loc_dei_EntityDomain_ef66da1a-6542-489c-9487-45c0667778e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_ef74c64e-3dd9-4421-9cd2-d785c79b4782" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_ef66da1a-6542-489c-9487-45c0667778e7" xlink:to="loc_aal_AmericanAirlinesIncMember_ef74c64e-3dd9-4421-9cd2-d785c79b4782" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_b0924d78-1686-4073-9efa-40f80e0d75e9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6203f58b-6b09-4ff2-ba1a-923fdee72d27" xlink:to="loc_us-gaap_AwardTypeAxis_b0924d78-1686-4073-9efa-40f80e0d75e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b0924d78-1686-4073-9efa-40f80e0d75e9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_b0924d78-1686-4073-9efa-40f80e0d75e9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_b0924d78-1686-4073-9efa-40f80e0d75e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb46b14f-b208-4756-a32c-a724157426be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_b0924d78-1686-4073-9efa-40f80e0d75e9" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb46b14f-b208-4756-a32c-a724157426be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_be95d0a7-fb1d-4326-9479-eb8d427a5196" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fb46b14f-b208-4756-a32c-a724157426be" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_be95d0a7-fb1d-4326-9479-eb8d427a5196" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_21c2deb6-6a2b-4691-80ba-842177e4c69c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_21c2deb6-6a2b-4691-80ba-842177e4c69c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_67062c11-7dac-4509-bebc-d2b555bcd614" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_67062c11-7dac-4509-bebc-d2b555bcd614" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_d70686fb-ed32-4f8b-a734-992447803dde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_d70686fb-ed32-4f8b-a734-992447803dde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f09e9993-1e46-40f1-95c9-471a0adb961a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_f09e9993-1e46-40f1-95c9-471a0adb961a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_948fadbb-154a-4744-84b1-3aeedb665784" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_8e38df09-1322-458c-b82b-fcb0691130bb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_948fadbb-154a-4744-84b1-3aeedb665784" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_b303ec4d-dba6-4467-a025-5aea3d41d35d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_15264196-96dd-45f6-805a-73e379317bc6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_15264196-96dd-45f6-805a-73e379317bc6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6713d6e6-328c-495c-aa3a-21df18496920" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_6713d6e6-328c-495c-aa3a-21df18496920" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_fdcb2053-562a-4085-b97a-3f1d5b8b483e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_fdcb2053-562a-4085-b97a-3f1d5b8b483e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_199f713c-3521-4c60-abf8-b13a0b402502" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_67f1ee00-0020-4b32-9601-96d3bf815b83" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_199f713c-3521-4c60-abf8-b13a0b402502" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_13e2b21e-d4ec-4a0e-aff9-be46816ec786" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_e8884099-5f68-44d5-bf09-aa39b22176c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_e8884099-5f68-44d5-bf09-aa39b22176c6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_9c92b144-b648-4419-86ab-25c6b5fb460b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_9c92b144-b648-4419-86ab-25c6b5fb460b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_c21f309c-e6ea-4bdb-a26b-1355f064ed5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_21161496-25bc-46c4-9a29-e263e41886bf" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_c21f309c-e6ea-4bdb-a26b-1355f064ed5a" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/ValuationandQualifyingAccountsDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#ValuationandQualifyingAccountsDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationandQualifyingAccountsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_2455b505-c96e-4631-b0ed-d705be03b533" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_3ffdda09-4481-438b-9d76-336b243f7b2c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ValuationAndQualifyingAccountsDisclosureTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_2455b505-c96e-4631-b0ed-d705be03b533" xlink:to="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_3ffdda09-4481-438b-9d76-336b243f7b2c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_8c7240fd-e049-4d0a-96f7-6cc7a52e490f" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_3ffdda09-4481-438b-9d76-336b243f7b2c" xlink:to="loc_dei_LegalEntityAxis_8c7240fd-e049-4d0a-96f7-6cc7a52e490f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_8c7240fd-e049-4d0a-96f7-6cc7a52e490f_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_8c7240fd-e049-4d0a-96f7-6cc7a52e490f" xlink:to="loc_dei_EntityDomain_8c7240fd-e049-4d0a-96f7-6cc7a52e490f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a0f10883-cdcd-4bbd-98e4-390b2bbc5d01" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_8c7240fd-e049-4d0a-96f7-6cc7a52e490f" xlink:to="loc_dei_EntityDomain_a0f10883-cdcd-4bbd-98e4-390b2bbc5d01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_86573745-421e-48c6-be4b-5941a41ab618" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_a0f10883-cdcd-4bbd-98e4-390b2bbc5d01" xlink:to="loc_aal_AmericanAirlinesIncMember_86573745-421e-48c6-be4b-5941a41ab618" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4f37854d-7bfa-491a-8c71-4997af061c10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureTable_3ffdda09-4481-438b-9d76-336b243f7b2c" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4f37854d-7bfa-491a-8c71-4997af061c10" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_4f37854d-7bfa-491a-8c71-4997af061c10_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4f37854d-7bfa-491a-8c71-4997af061c10" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_4f37854d-7bfa-491a-8c71-4997af061c10_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_a394a67f-b163-4bce-bdf6-f2bb56e5ddc4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_4f37854d-7bfa-491a-8c71-4997af061c10" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_a394a67f-b163-4bce-bdf6-f2bb56e5ddc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryValuationReserveMember_39240233-6542-4e4c-9a57-c02112633df7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InventoryValuationReserveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_a394a67f-b163-4bce-bdf6-f2bb56e5ddc4" xlink:to="loc_us-gaap_InventoryValuationReserveMember_39240233-6542-4e4c-9a57-c02112633df7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_8a2293b2-4b7f-484a-9e37-d1fefbc53ca5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ValuationAndQualifyingAccountsDisclosureLineItems_2455b505-c96e-4631-b0ed-d705be03b533" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_8a2293b2-4b7f-484a-9e37-d1fefbc53ca5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_a5857eef-032b-440d-bf47-e7e77609331d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_8a2293b2-4b7f-484a-9e37-d1fefbc53ca5" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_a5857eef-032b-440d-bf47-e7e77609331d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_00d33520-375b-413c-924c-6103864af1f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_8a2293b2-4b7f-484a-9e37-d1fefbc53ca5" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_00d33520-375b-413c-924c-6103864af1f7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_62c3fc82-9c08-46b5-9f9d-dbd7e9b2b1f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesDeductions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_8a2293b2-4b7f-484a-9e37-d1fefbc53ca5" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_62c3fc82-9c08-46b5-9f9d-dbd7e9b2b1f1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_67341679-23e8-4c72-97d8-934659a70cbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowancesAndReservesBalance"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/TransactionswithRelatedPartiesNetReceivablesPayablestoRelatedPartiesDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#TransactionswithRelatedPartiesNetReceivablesPayablestoRelatedPartiesDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionswithRelatedPartiesNetReceivablesPayablestoRelatedPartiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_fff4c3a1-f423-496f-bb08-152ed2194073" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_fff4c3a1-f423-496f-bb08-152ed2194073" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5d50c18d-325f-402e-881a-ae76e3ba02d8" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_fff4c3a1-f423-496f-bb08-152ed2194073" xlink:to="loc_dei_LegalEntityAxis_5d50c18d-325f-402e-881a-ae76e3ba02d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5d50c18d-325f-402e-881a-ae76e3ba02d8_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5d50c18d-325f-402e-881a-ae76e3ba02d8" xlink:to="loc_dei_EntityDomain_5d50c18d-325f-402e-881a-ae76e3ba02d8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_d5d04048-6b0e-4842-aacc-8a2dd2c4d76a" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5d50c18d-325f-402e-881a-ae76e3ba02d8" xlink:to="loc_dei_EntityDomain_d5d04048-6b0e-4842-aacc-8a2dd2c4d76a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_4acbbd99-772c-49bb-b9b5-42b520e10568" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_d5d04048-6b0e-4842-aacc-8a2dd2c4d76a" xlink:to="loc_aal_AmericanAirlinesIncMember_4acbbd99-772c-49bb-b9b5-42b520e10568" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f5f61708-91e8-4da8-8b78-10845bb1e4d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_fff4c3a1-f423-496f-bb08-152ed2194073" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f5f61708-91e8-4da8-8b78-10845bb1e4d1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f5f61708-91e8-4da8-8b78-10845bb1e4d1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f5f61708-91e8-4da8-8b78-10845bb1e4d1" xlink:to="loc_us-gaap_RelatedPartyDomain_f5f61708-91e8-4da8-8b78-10845bb1e4d1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_6814ad49-da14-4c7d-89dd-70411f39fc34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f5f61708-91e8-4da8-8b78-10845bb1e4d1" xlink:to="loc_us-gaap_RelatedPartyDomain_6814ad49-da14-4c7d-89dd-70411f39fc34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_9cb22631-ceb1-4570-9e90-8467859ddade" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_6814ad49-da14-4c7d-89dd-70411f39fc34" xlink:to="loc_srt_ParentCompanyMember_9cb22631-ceb1-4570-9e90-8467859ddade" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOfCommonParentMember_71beb10b-bde4-457c-b2c6-2d77856cf83a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsidiaryOfCommonParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_6814ad49-da14-4c7d-89dd-70411f39fc34" xlink:to="loc_us-gaap_SubsidiaryOfCommonParentMember_71beb10b-bde4-457c-b2c6-2d77856cf83a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesGrossCurrent_8311cf90-d4b6-458b-a1cb-b836a2762fda" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherReceivablesGrossCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:to="loc_us-gaap_OtherReceivablesGrossCurrent_8311cf90-d4b6-458b-a1cb-b836a2762fda" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_0c73613d-3442-4723-9a17-6e6da239a3db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:to="loc_us-gaap_AccountsPayableCurrent_0c73613d-3442-4723-9a17-6e6da239a3db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReceivablesNetCurrent_65367974-c55f-4222-add1-4a7b6c7c8a72" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherReceivablesNetCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:to="loc_us-gaap_OtherReceivablesNetCurrent_65367974-c55f-4222-add1-4a7b6c7c8a72" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_4973c705-e477-4dab-b0a4-29de9ed4ef7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_5e08e1db-8f5e-4818-a707-1e67cdaa4d0a" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_4973c705-e477-4dab-b0a4-29de9ed4ef7e" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.aa.com/role/TransactionswithRelatedPartiesAdditionalInformationDetails" xlink:type="simple" xlink:href="aal-20231231.xsd#TransactionswithRelatedPartiesAdditionalInformationDetails"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionswithRelatedPartiesAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_8911f197-0e2a-4b92-a9e2-88a05dcd9780" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_8911f197-0e2a-4b92-a9e2-88a05dcd9780" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_5394f20e-2412-4234-8336-37a1eb97ac22" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:to="loc_dei_LegalEntityAxis_5394f20e-2412-4234-8336-37a1eb97ac22" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_5394f20e-2412-4234-8336-37a1eb97ac22_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_5394f20e-2412-4234-8336-37a1eb97ac22" xlink:to="loc_dei_EntityDomain_5394f20e-2412-4234-8336-37a1eb97ac22_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_eeec6976-8b6f-42df-aa0a-8eb02991fc00" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_5394f20e-2412-4234-8336-37a1eb97ac22" xlink:to="loc_dei_EntityDomain_eeec6976-8b6f-42df-aa0a-8eb02991fc00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_aal_AmericanAirlinesIncMember_efd5772e-430f-4176-8dfd-8573b1935088" xlink:href="aal-20231231.xsd#aal_AmericanAirlinesIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_eeec6976-8b6f-42df-aa0a-8eb02991fc00" xlink:to="loc_aal_AmericanAirlinesIncMember_efd5772e-430f-4176-8dfd-8573b1935088" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_d5fec6b2-9789-4143-8495-1e9897c48ff4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:to="loc_srt_ProductOrServiceAxis_d5fec6b2-9789-4143-8495-1e9897c48ff4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d5fec6b2-9789-4143-8495-1e9897c48ff4_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_d5fec6b2-9789-4143-8495-1e9897c48ff4" xlink:to="loc_srt_ProductsAndServicesDomain_d5fec6b2-9789-4143-8495-1e9897c48ff4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_0c605308-19dc-4546-b50a-eaf5b925e2c3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_d5fec6b2-9789-4143-8495-1e9897c48ff4" xlink:to="loc_srt_ProductsAndServicesDomain_0c605308-19dc-4546-b50a-eaf5b925e2c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RegionalCarrierMember_e582de37-71c0-4e2f-a364-9fbe6c8b612c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RegionalCarrierMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_0c605308-19dc-4546-b50a-eaf5b925e2c3" xlink:to="loc_us-gaap_RegionalCarrierMember_e582de37-71c0-4e2f-a364-9fbe6c8b612c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6f3b797f-b4ff-4bee-9d96-dacf99611f61" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6f3b797f-b4ff-4bee-9d96-dacf99611f61" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_6f3b797f-b4ff-4bee-9d96-dacf99611f61_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6f3b797f-b4ff-4bee-9d96-dacf99611f61" xlink:to="loc_us-gaap_RelatedPartyDomain_6f3b797f-b4ff-4bee-9d96-dacf99611f61_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_2c28069a-a5f1-4180-82f4-91747b8c7bd1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_6f3b797f-b4ff-4bee-9d96-dacf99611f61" xlink:to="loc_us-gaap_RelatedPartyDomain_2c28069a-a5f1-4180-82f4-91747b8c7bd1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsidiaryOfCommonParentMember_eeb37d0f-d0e6-4beb-8204-92428e4b04f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsidiaryOfCommonParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_2c28069a-a5f1-4180-82f4-91747b8c7bd1" xlink:to="loc_us-gaap_SubsidiaryOfCommonParentMember_eeb37d0f-d0e6-4beb-8204-92428e4b04f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_7f7a7262-9c8d-48d9-b324-6ad380720079" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_9623fcf2-a644-47f2-bab7-93df1aa34f2f" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_7f7a7262-9c8d-48d9-b324-6ad380720079" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_7f7a7262-9c8d-48d9-b324-6ad380720079_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_7f7a7262-9c8d-48d9-b324-6ad380720079" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_7f7a7262-9c8d-48d9-b324-6ad380720079_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_526a272b-0007-492a-9c1c-18a9ff5048ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_7f7a7262-9c8d-48d9-b324-6ad380720079" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_526a272b-0007-492a-9c1c-18a9ff5048ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_4a04656a-c942-4a78-b6b2-4e7d6f361bca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_526a272b-0007-492a-9c1c-18a9ff5048ad" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_4a04656a-c942-4a78-b6b2-4e7d6f361bca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_5e0db8b8-0f8b-4866-82dd-d7c5184ea385" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AirlineCapacityPurchaseArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_8911f197-0e2a-4b92-a9e2-88a05dcd9780" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_5e0db8b8-0f8b-4866-82dd-d7c5184ea385" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TypeOfAdoptionMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate202006Member" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountingStandardsUpdate202006Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember" xlink:to="loc_us-gaap_AccountingStandardsUpdate202006Member" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesCurrentAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#AwardTypeOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/ecd/AwardTypeOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockUnitsRSUMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
