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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019eccbb-1a81-7ca3-9a03-3441edc65adf,g:12b0dd73-eb2e-42eb-88ce-4e99772149a9-->
<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-20260614.xsd#Cover"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019eccbb-1a81-707e-bed8-f2e2ae731bf0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntitiesTable_019eccbb-1a81-707e-bed8-f2e2ae731bf0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019eccbb-1a81-7cc8-838d-046477f0acc0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019eccbb-1a81-707e-bed8-f2e2ae731bf0" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019eccbb-1a81-7cc8-838d-046477f0acc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-7cc8-838d-046477f0acc0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019eccbb-1a81-7cc8-838d-046477f0acc0" xlink:to="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-7cc8-838d-046477f0acc0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-720c-b97a-26e19a2db8e2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019eccbb-1a81-7cc8-838d-046477f0acc0" xlink:to="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-720c-b97a-26e19a2db8e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019eccbb-1a81-7636-878b-e0480adfa5dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-720c-b97a-26e19a2db8e2" xlink:to="loc_us-gaap_CommonStockMember_019eccbb-1a81-7636-878b-e0480adfa5dd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019eccbb-1a81-74ee-aadc-411747c071ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019eccbb-1a81-720c-b97a-26e19a2db8e2" xlink:to="loc_us-gaap_WarrantMember_019eccbb-1a81-74ee-aadc-411747c071ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019eccbb-1a81-7e97-af94-60bdfbf71d25" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_DocumentType_019eccbb-1a81-7e97-af94-60bdfbf71d25" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019eccbb-1a81-7874-8b7b-3d8088b0f8bb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_AmendmentFlag_019eccbb-1a81-7874-8b7b-3d8088b0f8bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019eccbb-1a81-7a48-a307-279c61a78ead" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_DocumentPeriodEndDate_019eccbb-1a81-7a48-a307-279c61a78ead" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019eccbb-1a81-77d4-aeaa-79eebabc1436" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityRegistrantName_019eccbb-1a81-77d4-aeaa-79eebabc1436" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019eccbb-1a81-741f-944b-956da26ddace" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityCentralIndexKey_019eccbb-1a81-741f-944b-956da26ddace" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019eccbb-1a81-7d44-8d73-8521170c0530" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019eccbb-1a81-7d44-8d73-8521170c0530" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019eccbb-1a81-7dd5-a099-d8b7bbb03dac" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityFileNumber_019eccbb-1a81-7dd5-a099-d8b7bbb03dac" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019eccbb-1a81-77d7-ba7e-6b95e13526b4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityTaxIdentificationNumber_019eccbb-1a81-77d7-ba7e-6b95e13526b4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019eccbb-1a81-7e29-8979-09c96ff084d8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityAddressAddressLine1_019eccbb-1a81-7e29-8979-09c96ff084d8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019eccbb-1a81-7302-8d0a-cf584ac04c23" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityAddressCityOrTown_019eccbb-1a81-7302-8d0a-cf584ac04c23" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019eccbb-1a81-7f59-b6a5-f07cd79b97f2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityAddressStateOrProvince_019eccbb-1a81-7f59-b6a5-f07cd79b97f2" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019eccbb-1a81-7190-92b5-23d47227c304" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityAddressPostalZipCode_019eccbb-1a81-7190-92b5-23d47227c304" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019eccbb-1a81-7444-9249-02b8347db6f3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_CityAreaCode_019eccbb-1a81-7444-9249-02b8347db6f3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019eccbb-1a81-77d5-9f9f-fe54f4f56e3d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_LocalPhoneNumber_019eccbb-1a81-77d5-9f9f-fe54f4f56e3d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019eccbb-1a81-7eb9-9971-f45e36809366" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_WrittenCommunications_019eccbb-1a81-7eb9-9971-f45e36809366" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019eccbb-1a81-753d-bd29-c374422024ec" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_SolicitingMaterial_019eccbb-1a81-753d-bd29-c374422024ec" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019eccbb-1a81-7991-ad36-6db8d6a711c8" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_PreCommencementTenderOffer_019eccbb-1a81-7991-ad36-6db8d6a711c8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019eccbb-1a81-71ae-9087-94833253ef4e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019eccbb-1a81-71ae-9087-94833253ef4e" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_019eccbb-1a81-7f02-acec-7b5085c3d8be" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_CurrentFiscalYearEndDate_019eccbb-1a81-7f02-acec-7b5085c3d8be" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019eccbb-1a81-7fbd-86ca-410767b6ab06" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_Security12bTitle_019eccbb-1a81-7fbd-86ca-410767b6ab06" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019eccbb-1a81-7c53-9de2-84fe4c0fed4a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_TradingSymbol_019eccbb-1a81-7c53-9de2-84fe4c0fed4a" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019eccbb-1a81-7106-b901-5c7e49eef030" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_SecurityExchangeName_019eccbb-1a81-7106-b901-5c7e49eef030" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019eccbb-1a81-704f-b08c-0d9810efadc3" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019eccbb-1a81-7dc3-b1fb-61a1d54a5b74" xlink:to="loc_dei_EntityEmergingGrowthCompany_019eccbb-1a81-704f-b08c-0d9810efadc3" xlink:type="arc" order="22"/>
  </link:definitionLink>
</link:linkbase>
