

<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:href="aal-20171231.xsd#AccumulatedOtherComprehensiveIncomeLoss" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:href="aal-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:href="aal-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:href="aal-20171231.xsd#AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesOperatingPropertyAndEquipmentDetail" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesOperatingPropertyAndEquipmentDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRegionalExpensesDetail" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRegionalExpensesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfAmortizableIntangibleAssetsDetail" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfAmortizableIntangibleAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfFutureAmortizationExpenseDetail" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfFutureAmortizationExpenseDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="aal-20171231.xsd#BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuarantees" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuarantees" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesAdditionalInformationDetail" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesCapacityPurchaseAgreementsDetail" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesCapacityPurchaseAgreementsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesLongTermPurchaseCommitmentsDetail" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesLongTermPurchaseCommitmentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesOperatingLeasesDetail" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesOperatingLeasesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesOtherPurchaseCommitmentsDetails" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesOtherPurchaseCommitmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesTables" xlink:href="aal-20171231.xsd#CommitmentsContingenciesAndGuaranteesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedBalanceSheets" xlink:href="aal-20171231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:href="aal-20171231.xsd#ConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="aal-20171231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:href="aal-20171231.xsd#ConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsOfOperations" xlink:href="aal-20171231.xsd#ConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="aal-20171231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:href="aal-20171231.xsd#ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/Debt" xlink:href="aal-20171231.xsd#Debt" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/Debt20132014And2016CreditFacilitiesDetail" xlink:href="aal-20171231.xsd#Debt20132014And2016CreditFacilitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtAdditionalInformationDetail" xlink:href="aal-20171231.xsd#DebtAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsOfLongTermDebtDetail" xlink:href="aal-20171231.xsd#DebtComponentsOfLongTermDebtDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsOfLongTermDebtEnhancedEquipmentTrustCertificatesDetail" xlink:href="aal-20171231.xsd#DebtComponentsOfLongTermDebtEnhancedEquipmentTrustCertificatesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsOfLongTermDebtEquipmentLoansAndOtherNotesPayableIssuedIn2016Detail" xlink:href="aal-20171231.xsd#DebtComponentsOfLongTermDebtEquipmentLoansAndOtherNotesPayableIssuedIn2016Detail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsOfLongTermDebtGuaranteesDetail" xlink:href="aal-20171231.xsd#DebtComponentsOfLongTermDebtGuaranteesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtComponentsOfLongTermDebtSeniorNotesDetail" xlink:href="aal-20171231.xsd#DebtComponentsOfLongTermDebtSeniorNotesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtDetailsOfEnhancedEquipmentTrustCertificatesDetail" xlink:href="aal-20171231.xsd#DebtDetailsOfEnhancedEquipmentTrustCertificatesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtDetailsOfSeniorNotesDetail" xlink:href="aal-20171231.xsd#DebtDetailsOfSeniorNotesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtScheduleOfCollateralCoverageTestsDetail" xlink:href="aal-20171231.xsd#DebtScheduleOfCollateralCoverageTestsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtScheduleOfMaturitiesOfLongTermDebtAndCapitalLeasesDetail" xlink:href="aal-20171231.xsd#DebtScheduleOfMaturitiesOfLongTermDebtAndCapitalLeasesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtSummaryOfAvailabilityUnderRevolvingCreditFacilitiesDetail" xlink:href="aal-20171231.xsd#DebtSummaryOfAvailabilityUnderRevolvingCreditFacilitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DebtTables" xlink:href="aal-20171231.xsd#DebtTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/DocumentAndEntityInformation" xlink:href="aal-20171231.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EarningsLossPerShareComputationOfBasicAndDilutedEarningsPerCommonShareDetail" xlink:href="aal-20171231.xsd#EarningsLossPerShareComputationOfBasicAndDilutedEarningsPerCommonShareDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EarningsPerCommonShare" xlink:href="aal-20171231.xsd#EarningsPerCommonShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EarningsPerCommonShareTables" xlink:href="aal-20171231.xsd#EarningsPerCommonShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlans" xlink:href="aal-20171231.xsd#EmployeeBenefitPlans" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansChangesInFairValueMeasurementsOfLevel3InvestmentsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansChangesInFairValueMeasurementsOfLevel3InvestmentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansComponentsOfNetPeriodicBenefitCostIncomeDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansComponentsOfNetPeriodicBenefitCostIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansEmployeeBenefitPlansProfitSharingProgramDetails" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansEmployeeBenefitPlansProfitSharingProgramDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansFairValuesOfRetireeMedicalAndOtherPostretirementBenefitPlansAssetsByAssetCategoryDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansFairValuesOfRetireeMedicalAndOtherPostretirementBenefitPlansAssetsByAssetCategoryDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAccumulatedBenefitObligationsExceedingFairValueOfPlanAssetsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfAccumulatedBenefitObligationsExceedingFairValueOfPlanAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAllocationOfPlanAssetsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfAllocationOfPlanAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAmountsRecognizedInConsolidatedBalanceSheetsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfAmountsRecognizedInConsolidatedBalanceSheetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAmountsRecognizedInOtherComprehensiveIncomeDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfAmountsRecognizedInOtherComprehensiveIncomeDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAssumptionUsedToDetermineBenefitObligationsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfAssumptionUsedToDetermineBenefitObligationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfChangesInFairValueOfPlanAssetsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfChangesInFairValueOfPlanAssetsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfChangesInProjectedBenefitObligationsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfChangesInProjectedBenefitObligationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfExpectedFutureServiceBenefitPaymentsDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfExpectedFutureServiceBenefitPaymentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryParentheticalDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryParentheticalDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesDetail" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/EmployeeBenefitPlansTables" xlink:href="aal-20171231.xsd#EmployeeBenefitPlansTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestments" xlink:href="aal-20171231.xsd#FairValueMeasurementsAndOtherInvestments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsOtherInvestmentsDetail" xlink:href="aal-20171231.xsd#FairValueMeasurementsAndOtherInvestmentsOtherInvestmentsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsScheduleOfCarryingValueAndEstimatedFairValueOfLongTermDebtIncludingCurrentMaturitiesDetail" xlink:href="aal-20171231.xsd#FairValueMeasurementsAndOtherInvestmentsScheduleOfCarryingValueAndEstimatedFairValueOfLongTermDebtIncludingCurrentMaturitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsSummaryOfAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:href="aal-20171231.xsd#FairValueMeasurementsAndOtherInvestmentsSummaryOfAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsTables" xlink:href="aal-20171231.xsd#FairValueMeasurementsAndOtherInvestmentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxes" xlink:href="aal-20171231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesAdditionalDisclosuresDetail" xlink:href="aal-20171231.xsd#IncomeTaxesAdditionalDisclosuresDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesComponentsOfIncomeTaxProvisionBenefitDetail" xlink:href="aal-20171231.xsd#IncomeTaxesComponentsOfIncomeTaxProvisionBenefitDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesComputationOfIncomeTaxProvisionBenefitDetail" xlink:href="aal-20171231.xsd#IncomeTaxesComputationOfIncomeTaxProvisionBenefitDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetail" xlink:href="aal-20171231.xsd#IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/IncomeTaxesTables" xlink:href="aal-20171231.xsd#IncomeTaxesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosures" xlink:href="aal-20171231.xsd#OperatingSegmentsAndRelatedDisclosures" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresAdditionalInformationDetail" xlink:href="aal-20171231.xsd#OperatingSegmentsAndRelatedDisclosuresAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresOperatingRevenuesByGeographicRegionDetail" xlink:href="aal-20171231.xsd#OperatingSegmentsAndRelatedDisclosuresOperatingRevenuesByGeographicRegionDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresTables" xlink:href="aal-20171231.xsd#OperatingSegmentsAndRelatedDisclosuresTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/QuarterlyFinancialDataAdditionalInformationDetail" xlink:href="aal-20171231.xsd#QuarterlyFinancialDataAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/QuarterlyFinancialDataSummarizedFinancialDataDetail" xlink:href="aal-20171231.xsd#QuarterlyFinancialDataSummarizedFinancialDataDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/QuarterlyFinancialDataUnaudited" xlink:href="aal-20171231.xsd#QuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/QuarterlyFinancialDataUnauditedTables" xlink:href="aal-20171231.xsd#QuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/RiskManagement" xlink:href="aal-20171231.xsd#RiskManagement" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/RiskManagementAdditionalInformationDetail" xlink:href="aal-20171231.xsd#RiskManagementAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensation" xlink:href="aal-20171231.xsd#ShareBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationAdditionalInformationDetail" xlink:href="aal-20171231.xsd#ShareBasedCompensationAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationRestrictedStockUnitAwardsDetail" xlink:href="aal-20171231.xsd#ShareBasedCompensationRestrictedStockUnitAwardsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationShareBasedCompensationAsu201609Details" xlink:href="aal-20171231.xsd#ShareBasedCompensationShareBasedCompensationAsu201609Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationShareBasedCompensationStockAppreciationRightsDetail" xlink:href="aal-20171231.xsd#ShareBasedCompensationShareBasedCompensationStockAppreciationRightsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareBasedCompensationTables" xlink:href="aal-20171231.xsd#ShareBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareRepurchaseProgramsAndDividends" xlink:href="aal-20171231.xsd#ShareRepurchaseProgramsAndDividends" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareRepurchaseProgramsAndDividendsDividendsDetail" xlink:href="aal-20171231.xsd#ShareRepurchaseProgramsAndDividendsDividendsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ShareRepurchaseProgramsAndDividendsShareRepurchaseProgramsDetail" xlink:href="aal-20171231.xsd#ShareRepurchaseProgramsAndDividendsShareRepurchaseProgramsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsAdditionalDisclosuresDetail" xlink:href="aal-20171231.xsd#SpecialItemsAdditionalDisclosuresDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsComponentsOfSpecialItemsNetIncludedInConsolidatedStatementsOfOperationsDetail" xlink:href="aal-20171231.xsd#SpecialItemsComponentsOfSpecialItemsNetIncludedInConsolidatedStatementsOfOperationsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsNet" xlink:href="aal-20171231.xsd#SpecialItemsNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SpecialItemsNetTables" xlink:href="aal-20171231.xsd#SpecialItemsNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SubsequentEvent" xlink:href="aal-20171231.xsd#SubsequentEvent" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SubsequentEventAdditionalInformationDetail" xlink:href="aal-20171231.xsd#SubsequentEventAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformation" xlink:href="aal-20171231.xsd#SupplementalCashFlowInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformationCashFlowInformationAndNonCashInvestingAndFinancingActivitiesDetail" xlink:href="aal-20171231.xsd#SupplementalCashFlowInformationCashFlowInformationAndNonCashInvestingAndFinancingActivitiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/SupplementalCashFlowInformationTables" xlink:href="aal-20171231.xsd#SupplementalCashFlowInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/TransactionsWithRelatedParties" xlink:href="aal-20171231.xsd#TransactionsWithRelatedParties" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/TransactionsWithRelatedPartiesAdditionalInformationDetail" xlink:href="aal-20171231.xsd#TransactionsWithRelatedPartiesAdditionalInformationDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/TransactionsWithRelatedPartiesDetail" xlink:href="aal-20171231.xsd#TransactionsWithRelatedPartiesDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/TransactionsWithRelatedPartiesTables" xlink:href="aal-20171231.xsd#TransactionsWithRelatedPartiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ValuationAndQualifyingAccounts" xlink:href="aal-20171231.xsd#ValuationAndQualifyingAccounts" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ValuationAndQualifyingAccountsComponentsOfValuationAndQualifyingAccountsDetail" xlink:href="aal-20171231.xsd#ValuationAndQualifyingAccountsComponentsOfValuationAndQualifyingAccountsDetail" xlink:type="simple" />
  <link:roleRef roleURI="http://www.aa.com/role/ValuationAndQualifyingAccountsTables" xlink:href="aal-20171231.xsd#ValuationAndQualifyingAccountsTables" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple" />
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple" />
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLoss" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_61483447C7CEBAFEC9FDB5722708138B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8BFD01A7C0278758A64DB572270784B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_61483447C7CEBAFEC9FDB5722708138B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8BFD01A7C0278758A64DB572270784B4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_665AD313E712D980FEE6B57227075C00" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8BFD01A7C0278758A64DB572270784B4" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_665AD313E712D980FEE6B57227075C00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_064BFABDA634F018D828B57227070C7B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_665AD313E712D980FEE6B57227075C00" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_064BFABDA634F018D828B57227070C7B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_064BFABDA634F018D828B57227070C7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_665AD313E712D980FEE6B57227075C00" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_064BFABDA634F018D828B57227070C7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_48B988DE310DAE23791CB5722707F0C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_064BFABDA634F018D828B57227070C7B" xlink:to="loc_us-gaap_SubsidiariesMember_48B988DE310DAE23791CB5722707F0C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNoteTextBlock" xlink:label="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_A2BF4C66F8B1D73D4BABB57227083949" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_61483447C7CEBAFEC9FDB5722708138B" xlink:to="loc_us-gaap_ComprehensiveIncomeNoteTextBlock_A2BF4C66F8B1D73D4BABB57227083949" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C27A070F30D2FFDDA71DB572270028F3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_97C4E125E8DD7FA0AD13B57227001048" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C27A070F30D2FFDDA71DB572270028F3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_97C4E125E8DD7FA0AD13B57227001048" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_9DC12C3DEC1FB6DC5735B5722700F8B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_97C4E125E8DD7FA0AD13B57227001048" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_9DC12C3DEC1FB6DC5735B5722700F8B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_42AD3672BC7DE5D51834B5722700C6DE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9DC12C3DEC1FB6DC5735B5722700F8B2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_42AD3672BC7DE5D51834B5722700C6DE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_42AD3672BC7DE5D51834B5722700C6DE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9DC12C3DEC1FB6DC5735B5722700F8B2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_42AD3672BC7DE5D51834B5722700C6DE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B798149CBB636158C8E7B5722700FE18" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_42AD3672BC7DE5D51834B5722700C6DE" xlink:to="loc_us-gaap_SubsidiariesMember_B798149CBB636158C8E7B5722700FE18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_429DA63E67772A8BB915B5722700C238" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_97C4E125E8DD7FA0AD13B57227001048" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_429DA63E67772A8BB915B5722700C238" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_429DA63E67772A8BB915B5722700C238" xlink:to="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_429DA63E67772A8BB915B5722700C238" xlink:to="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_98D45BAE58284756000EB57227003C60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_98D45BAE58284756000EB57227003C60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_E5F621CBDD0CE3EC5B7AB57227002B07" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_BBF3DD3AC087AFB1AB30B572270011EA" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_E5F621CBDD0CE3EC5B7AB57227002B07" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AociBeforeTaxAttributableToParentRollForward" xlink:label="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C27A070F30D2FFDDA71DB572270028F3" xlink:to="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AociBeforeTaxAttributableToParent" xlink:label="loc_us-gaap_AociBeforeTaxAttributableToParent_A5E6DE9B8064E8E6B789B5722700E3F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:to="loc_us-gaap_AociBeforeTaxAttributableToParent_A5E6DE9B8064E8E6B789B5722700E3F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent" xlink:label="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_AC10F90AD17DDAF66746B5722700C41A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:to="loc_us-gaap_OciBeforeReclassificationsBeforeTaxAttributableToParent_AC10F90AD17DDAF66746B5722700C41A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_5266C23EFD761E337381B57227010D4B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent_5266C23EFD761E337381B57227010D4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_97DDBC6CE553C7DE2E34B57227011B79" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociBeforeTaxAttributableToParentRollForward_6A3DDC2A2D0D4528906FB5722700FC77" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent_97DDBC6CE553C7DE2E34B57227011B79" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AociTaxAttributableToParentRollForward" xlink:label="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C27A070F30D2FFDDA71DB572270028F3" xlink:to="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AociTaxAttributableToParent" xlink:label="loc_us-gaap_AociTaxAttributableToParent_ED1A674AB0BB7451E3F8B572270134FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:to="loc_us-gaap_AociTaxAttributableToParent_ED1A674AB0BB7451E3F8B572270134FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_04359FE141572F44E9AFB5722701FF97" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax_04359FE141572F44E9AFB5722701FF97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodTax" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_4CE15BBA85FD124C1E54B5722701CF44" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodTax_4CE15BBA85FD124C1E54B5722701CF44" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_CFA458DA99762DC0684DB57227010D93" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AociTaxAttributableToParentRollForward_0BCA232405851DC7E2EDB5722701EBF0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_CFA458DA99762DC0684DB57227010D93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_C27A070F30D2FFDDA71DB572270028F3" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97EBF2265534030AA8BFB5722701C528" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_97EBF2265534030AA8BFB5722701C528" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_4B109C99B6CD022D4AB1B5722701ABF9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_4B109C99B6CD022D4AB1B5722701ABF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_4704C1AA43C2A782A33AB57227019AB7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_4704C1AA43C2A782A33AB57227019AB7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_F12E370CA9C2DDDBEB68B5722701FD24" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_3C28AC7F0E7528C5F4CEB5722701B5DC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_F12E370CA9C2DDDBEB68B5722701FD24" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossReclassificationsOutOfAccumulatedOtherComprehensiveIncomeLossDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_051DE4959B428014A6F8B57226FA3466" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_FA170F190AE262BDD36CB57226F97A16" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_051DE4959B428014A6F8B57226FA3466" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_FA170F190AE262BDD36CB57226F97A16" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_C7D992E2F796923330A2B57226FAA16B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_FA170F190AE262BDD36CB57226F97A16" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_C7D992E2F796923330A2B57226FAA16B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A8A0D8C40D6E87E12246B57226FAA6DD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C7D992E2F796923330A2B57226FAA16B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A8A0D8C40D6E87E12246B57226FAA6DD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A8A0D8C40D6E87E12246B57226FAA6DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C7D992E2F796923330A2B57226FAA16B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A8A0D8C40D6E87E12246B57226FAA6DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B82D0C30060CF3AB7EA5B57226FADC60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_A8A0D8C40D6E87E12246B57226FAA6DD" xlink:to="loc_us-gaap_SubsidiariesMember_B82D0C30060CF3AB7EA5B57226FADC60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_D7657E51954C091C2335B57226FAD4F6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_FA170F190AE262BDD36CB57226F97A16" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_D7657E51954C091C2335B57226FAD4F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D7657E51954C091C2335B57226FAD4F6" xlink:to="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_D7657E51954C091C2335B57226FAD4F6" xlink:to="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_F424DCFDE73FE31E5206B57226FA320C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceCostCreditMember_F424DCFDE73FE31E5206B57226FA320C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_EEC66735BC8DC9496DF9B57226FA8659" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_A6D616578156C631CD70B57226FAB547" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetUnamortizedGainLossMember_EEC66735BC8DC9496DF9B57226FA8659" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_672A429D4E2D893B80F1B57226FA4BBD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_051DE4959B428014A6F8B57226FA3466" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_672A429D4E2D893B80F1B57226FA4BBD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/AccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_CCEEADD6409ECBB66FC9B5722704F831" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_D9A0D293390379F76B34B5722704DEE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_CCEEADD6409ECBB66FC9B5722704F831" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_D9A0D293390379F76B34B5722704DEE5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_BEAF275DE53C7CD2627EB5722704B5F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_D9A0D293390379F76B34B5722704DEE5" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_BEAF275DE53C7CD2627EB5722704B5F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_742BEA2CAD69B0BE95BBB5722704749E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BEAF275DE53C7CD2627EB5722704B5F8" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_742BEA2CAD69B0BE95BBB5722704749E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_742BEA2CAD69B0BE95BBB5722704749E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BEAF275DE53C7CD2627EB5722704B5F8" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_742BEA2CAD69B0BE95BBB5722704749E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B890AB241A2D5B4CA8D5B5722704F871" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_742BEA2CAD69B0BE95BBB5722704749E" xlink:to="loc_us-gaap_SubsidiariesMember_B890AB241A2D5B4CA8D5B5722704F871" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_4D1F7B2B93FEEB32F72BB5722705E211" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_CCEEADD6409ECBB66FC9B5722704F831" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_4D1F7B2B93FEEB32F72BB5722705E211" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_B3492124C5B2853179A4B5722705F5D4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_CCEEADD6409ECBB66FC9B5722704F831" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock_B3492124C5B2853179A4B5722705F5D4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_800319653BE3E1198E77B57228DA8186" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_9A1CB4E577C5DD010998B57228D5A137" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_800319653BE3E1198E77B57228DA8186" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_9A1CB4E577C5DD010998B57228D5A137" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_44F59E8EB699B1F1FB1AB57228D5623C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_9A1CB4E577C5DD010998B57228D5A137" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_44F59E8EB699B1F1FB1AB57228D5623C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_DB7E25E8C64349F7AC9DB57228D5452D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_44F59E8EB699B1F1FB1AB57228D5623C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_DB7E25E8C64349F7AC9DB57228D5452D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_DB7E25E8C64349F7AC9DB57228D5452D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_44F59E8EB699B1F1FB1AB57228D5623C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_DB7E25E8C64349F7AC9DB57228D5452D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_6DE5BAC2A3088F2BDAB5B57228D5D108" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_DB7E25E8C64349F7AC9DB57228D5452D" xlink:to="loc_us-gaap_SubsidiariesMember_6DE5BAC2A3088F2BDAB5B57228D5D108" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_BA0C37F47407C0804E76B57228DA011B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_800319653BE3E1198E77B57228DA8186" xlink:to="loc_us-gaap_BasisOfPresentationAndSignificantAccountingPoliciesTextBlock_BA0C37F47407C0804E76B57228DA011B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_10E0DCBA32CDFD8E3E66B5B6C168ACA1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_10E0DCBA32CDFD8E3E66B5B6C168ACA1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_AFC2FDD56AC96F116B4FB5B6C1682ED3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10E0DCBA32CDFD8E3E66B5B6C168ACA1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_AFC2FDD56AC96F116B4FB5B6C1682ED3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_AFC2FDD56AC96F116B4FB5B6C1682ED3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10E0DCBA32CDFD8E3E66B5B6C168ACA1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_AFC2FDD56AC96F116B4FB5B6C1682ED3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_94416636DACD8226488DB5B6C1681D2F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_AFC2FDD56AC96F116B4FB5B6C1682ED3" xlink:to="loc_us-gaap_SubsidiariesMember_94416636DACD8226488DB5B6C1681D2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B0034A0F4126CEFA678AB5B6C1682A84" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B0034A0F4126CEFA678AB5B6C1682A84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B0034A0F4126CEFA678AB5B6C1682A84" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_B0034A0F4126CEFA678AB5B6C1682A84" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_GateLeaseRightsMember" xlink:label="loc_aal_GateLeaseRightsMember_2757C695AD20669FDDF4B5B6C168FA8B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:to="loc_aal_GateLeaseRightsMember_2757C695AD20669FDDF4B5B6C168FA8B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AirportTakeOffAndLandingSlotsMember" xlink:label="loc_aal_AirportTakeOffAndLandingSlotsMember_8182CA6483A9DC52D279B5B6C16893EA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:to="loc_aal_AirportTakeOffAndLandingSlotsMember_8182CA6483A9DC52D279B5B6C16893EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_04F7A1A3673F756A73EBB5B6C168691F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:to="loc_us-gaap_CustomerRelationshipsMember_04F7A1A3673F756A73EBB5B6C168691F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketingRelatedIntangibleAssetsMember" xlink:label="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_9A7E3992CE5E6283CE7DB5B6C16957AF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_302CC20874BBF4786F12B5B6C1683D34" xlink:to="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_9A7E3992CE5E6283CE7DB5B6C16957AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrencyAxis" xlink:label="loc_us-gaap_CurrencyAxis_0BD44E8202D48AF81895B5B6C16999CF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:to="loc_us-gaap_CurrencyAxis_0BD44E8202D48AF81895B5B6C16999CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="loc_currency_AllCurrenciesDomain_42499E6F2ADB4EEB1070B5B6C16949DC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CurrencyAxis_0BD44E8202D48AF81895B5B6C16999CF" xlink:to="loc_currency_AllCurrenciesDomain_42499E6F2ADB4EEB1070B5B6C16949DC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_AllCurrenciesDomain" xlink:label="loc_currency_AllCurrenciesDomain_42499E6F2ADB4EEB1070B5B6C16949DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CurrencyAxis_0BD44E8202D48AF81895B5B6C16999CF" xlink:to="loc_currency_AllCurrenciesDomain_42499E6F2ADB4EEB1070B5B6C16949DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/currency/2017/currency-2017-01-31.xsd#currency_VEF" xlink:label="loc_currency_VEF_12F12EFCF3F57D6753C6B5B6C169F28A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_currency_AllCurrenciesDomain_42499E6F2ADB4EEB1070B5B6C16949DC" xlink:to="loc_currency_VEF_12F12EFCF3F57D6753C6B5B6C169F28A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_7F91DC1DEE4062BBEA69B5B6C16996F9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:to="loc_us-gaap_ProductOrServiceAxis_7F91DC1DEE4062BBEA69B5B6C16996F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_CC6F7B2CB30DEB8AB491B5B6C1696DFA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_7F91DC1DEE4062BBEA69B5B6C16996F9" xlink:to="loc_us-gaap_ProductsAndServicesDomain_CC6F7B2CB30DEB8AB491B5B6C1696DFA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_CC6F7B2CB30DEB8AB491B5B6C1696DFA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_7F91DC1DEE4062BBEA69B5B6C16996F9" xlink:to="loc_us-gaap_ProductsAndServicesDomain_CC6F7B2CB30DEB8AB491B5B6C1696DFA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AAdvantageProgramMember" xlink:label="loc_aal_AAdvantageProgramMember_EFE10F799445930CE322B5B6C169EF6C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_CC6F7B2CB30DEB8AB491B5B6C1696DFA" xlink:to="loc_aal_AAdvantageProgramMember_EFE10F799445930CE322B5B6C169EF6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeAxis" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeAxis_B8F44F8F45BFC5FE196DB5B6C169A8A0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_B44D626CB042C3E6584CB5B6C1688787" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeAxis_B8F44F8F45BFC5FE196DB5B6C169A8A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_B8F44F8F45BFC5FE196DB5B6C169A8A0" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredRevenueArrangementTypeDomain" xlink:label="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeAxis_B8F44F8F45BFC5FE196DB5B6C169A8A0" xlink:to="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MileageCreditsSaleMember" xlink:label="loc_aal_MileageCreditsSaleMember_E427F56A313AAAB83AB9B5B6C16956BF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A" xlink:to="loc_aal_MileageCreditsSaleMember_E427F56A313AAAB83AB9B5B6C16956BF" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MarketingComponentOfMileageSalesMember" xlink:label="loc_aal_MarketingComponentOfMileageSalesMember_97CAA8E3493C9F10504AB5B6C1698FE0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredRevenueArrangementTypeDomain_32E94DE00C2462116AD5B5B6C169488A" xlink:to="loc_aal_MarketingComponentOfMileageSalesMember_97CAA8E3493C9F10504AB5B6C1698FE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_1846CA9DE98993A50408B5CB9296373D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_dei_DocumentFiscalYearFocus_1846CA9DE98993A50408B5CB9296373D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_66CB8BDA8B52F8B8E8E2B5CB8D2378B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_66CB8BDA8B52F8B8E8E2B5CB8D2378B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfReportingUnits" xlink:label="loc_us-gaap_NumberOfReportingUnits_64FA86BE0DC17CCD08ADB5B6C169FEAB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_NumberOfReportingUnits_64FA86BE0DC17CCD08ADB5B6C169FEAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_04A2B2AA3DDC4CE7B3B9B5B6C1699204" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_Goodwill_04A2B2AA3DDC4CE7B3B9B5B6C1699204" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1A4A73A6B7B02C7E72F5B5B6C16AC8C9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_1A4A73A6B7B02C7E72F5B5B6C16AC8C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_F412124B73C1302A17D0B5B6C16A50FD" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_F412124B73C1302A17D0B5B6C16A50FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_A76C3F2E5635BE28CB87B5B6C16A488D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_A76C3F2E5635BE28CB87B5B6C16A488D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_D99FDE4165085EDEB894B5B6C16A5ACE" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_D99FDE4165085EDEB894B5B6C16A5ACE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FrequentFlierLiabilityCurrent" xlink:label="loc_us-gaap_FrequentFlierLiabilityCurrent_203B2C249A10083ABE2BB5B6C16A1121" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_FrequentFlierLiabilityCurrent_203B2C249A10083ABE2BB5B6C16A1121" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RecognitionOfDeferredRevenue" xlink:label="loc_us-gaap_RecognitionOfDeferredRevenue_6E1340F6E9DBA7FDC34AB5B6C16AE0D5" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_RecognitionOfDeferredRevenue_6E1340F6E9DBA7FDC34AB5B6C16AE0D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirTrafficLiabilityCurrent" xlink:label="loc_us-gaap_AirTrafficLiabilityCurrent_58FA75C67F01F18EDFB0B5B6C16A624F" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_AirTrafficLiabilityCurrent_58FA75C67F01F18EDFB0B5B6C16A624F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketingAndAdvertisingExpense" xlink:label="loc_us-gaap_MarketingAndAdvertisingExpense_26311ABABDD1421824CCB5B6C16A5E95" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_MarketingAndAdvertisingExpense_26311ABABDD1421824CCB5B6C16A5E95" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_3704B1A7A2BED289725CB5B6C16AA49F" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossRealized_3704B1A7A2BED289725CB5B6C16AA49F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ForeignCurrencyTransactionGainLossWriteOffDueToLackOfRepatriationsAndDeterioratedEconomicConditionOfForeignCurrency" xlink:label="loc_aal_ForeignCurrencyTransactionGainLossWriteOffDueToLackOfRepatriationsAndDeterioratedEconomicConditionOfForeignCurrency_D5B794FA74012D357425B5B6C16A1D6D" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E37853C9BE5522F9301BB5B6C1697A1C" xlink:to="loc_aal_ForeignCurrencyTransactionGainLossWriteOffDueToLackOfRepatriationsAndDeterioratedEconomicConditionOfForeignCurrency_D5B794FA74012D357425B5B6C16A1D6D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesNewAccountingStandardsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_23520153F6CCF366E9FFB57228528BDD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_23520153F6CCF366E9FFB57228528BDD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_217C774A0E24F073F47AB57228570626_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_23520153F6CCF366E9FFB57228528BDD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_217C774A0E24F073F47AB57228570626_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_217C774A0E24F073F47AB57228570626" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_23520153F6CCF366E9FFB57228528BDD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_217C774A0E24F073F47AB57228570626" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_D967C2F44AECEB757949B57228581D9C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_217C774A0E24F073F47AB57228570626" xlink:to="loc_us-gaap_SubsidiariesMember_D967C2F44AECEB757949B57228581D9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_14E2A7CE1DF889C3E16EB5722858B085" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_14E2A7CE1DF889C3E16EB5722858B085" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_0B49CF2B02632CCF88A6B5722858841E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_14E2A7CE1DF889C3E16EB5722858B085" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_0B49CF2B02632CCF88A6B5722858841E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain" xlink:label="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_0B49CF2B02632CCF88A6B5722858841E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionAxis_14E2A7CE1DF889C3E16EB5722858B085" xlink:to="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_0B49CF2B02632CCF88A6B5722858841E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member" xlink:label="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_1E2F081C36002E7F2CA8B5722858CA0E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InitialApplicationPeriodCumulativeEffectTransitionDomain_0B49CF2B02632CCF88A6B5722858841E" xlink:to="loc_us-gaap_DifferenceBetweenRevenueGuidanceInEffectBeforeAndAfterTopic606Member_1E2F081C36002E7F2CA8B5722858CA0E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementScenarioAxis" xlink:label="loc_us-gaap_StatementScenarioAxis_B0A2CC84E2037AFE92F0B572285847C0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:to="loc_us-gaap_StatementScenarioAxis_B0A2CC84E2037AFE92F0B572285847C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementScenarioAxis_B0A2CC84E2037AFE92F0B572285847C0" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScenarioUnspecifiedDomain" xlink:label="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementScenarioAxis_B0A2CC84E2037AFE92F0B572285847C0" xlink:to="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestatementAdjustmentMember" xlink:label="loc_us-gaap_RestatementAdjustmentMember_CB85773DE70A6F8C4B10B57228580793" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80" xlink:to="loc_us-gaap_RestatementAdjustmentMember_CB85773DE70A6F8C4B10B57228580793" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProFormaMember" xlink:label="loc_us-gaap_ProFormaMember_B0F8A84844483A412B21B5722858328A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80" xlink:to="loc_us-gaap_ProFormaMember_B0F8A84844483A412B21B5722858328A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ProFormaandRestatementAdjustmentMember" xlink:label="loc_aal_ProFormaandRestatementAdjustmentMember_DDD46F625C283AC7FF52B57228583A4B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScenarioUnspecifiedDomain_92DE39AD28426BE1FA88B5722858FD80" xlink:to="loc_aal_ProFormaandRestatementAdjustmentMember_DDD46F625C283AC7FF52B57228583A4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_AF28AE87CE5F1B8AAC31B5722858A4B5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_B64028AFBDBDF3DD5BE7B57228526AC3" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_AF28AE87CE5F1B8AAC31B5722858A4B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_AF28AE87CE5F1B8AAC31B5722858A4B5" xlink:to="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_AF28AE87CE5F1B8AAC31B5722858A4B5" xlink:to="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201409Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201409Member_DD3335923EE6CA676D47B5722859874D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0" xlink:to="loc_us-gaap_AccountingStandardsUpdate201409Member_DD3335923EE6CA676D47B5722859874D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AccountingStandardsUpdate201707Member" xlink:label="loc_aal_AccountingStandardsUpdate201707Member_71D122ED9DDD1429FF75B5722859510F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_D21A326484FACD81B91DB57228589ED0" xlink:to="loc_aal_AccountingStandardsUpdate201707Member_71D122ED9DDD1429FF75B5722859510F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PassengerRevenue" xlink:label="loc_us-gaap_PassengerRevenue_0315E4B0EAD6A1F88FCEB5722859F99C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_PassengerRevenue_0315E4B0EAD6A1F88FCEB5722859F99C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CargoAndFreightRevenue" xlink:label="loc_us-gaap_CargoAndFreightRevenue_83103B599EFBA39B3284B57228594F00" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_CargoAndFreightRevenue_83103B599EFBA39B3284B57228594F00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSalesRevenueNet" xlink:label="loc_us-gaap_OtherSalesRevenueNet_98013CD7D27F45E68094B57228596D16" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_OtherSalesRevenueNet_98013CD7D27F45E68094B57228596D16" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_0D83043AE8718ED58617B57228592DA7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_SalesRevenueNet_0D83043AE8718ED58617B57228592DA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_BD3A17B15A5B78C9619FB5722859D771" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_CostsAndExpenses_BD3A17B15A5B78C9619FB5722859D771" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_460DBD3F0C0D12128961B5722859AA2E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_OperatingIncomeLoss_460DBD3F0C0D12128961B5722859AA2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_B63ED9DDAEAA080F8B81B5722859DAFA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_B63ED9DDAEAA080F8B81B5722859DAFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_F8DFE0BBF53FC630E97FB5722859AB47" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_F8DFE0BBF53FC630E97FB5722859AB47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_8F864099683A711B5C3DB57228590F35" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_8F864099683A711B5C3DB57228590F35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_90EA64EBEC6737FF3624B5722859E2F3" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_NetIncomeLoss_90EA64EBEC6737FF3624B5722859E2F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_61E8E78151B83864956EB57228595A7F" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_EarningsPerShareDiluted_61E8E78151B83864956EB57228595A7F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpense" xlink:label="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpense_E8827B065C47A6DDE764B572285910F9" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateDeferredTaxAssetProvisionalIncomeTaxExpense_E8827B065C47A6DDE764B572285910F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_CA7E2263DF96A68A8C9CB572285982F6" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_CA7E2263DF96A68A8C9CB572285982F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirTrafficLiabilityCurrent" xlink:label="loc_us-gaap_AirTrafficLiabilityCurrent_F6186ADA395DA8DBB4C3B5722859827D" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_AirTrafficLiabilityCurrent_F6186ADA395DA8DBB4C3B5722859827D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FrequentFlierLiabilityCurrent" xlink:label="loc_us-gaap_FrequentFlierLiabilityCurrent_9C5EEED139914E9F98F9B572285A4E29" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_FrequentFlierLiabilityCurrent_9C5EEED139914E9F98F9B572285A4E29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FrequentFlierLiabilityNoncurrent" xlink:label="loc_us-gaap_FrequentFlierLiabilityNoncurrent_49F6801CBCA94FA399CEB572285A4784" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_FrequentFlierLiabilityNoncurrent_49F6801CBCA94FA399CEB572285A4784" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_1038FAE9EA1D1725022BB572285AA31C" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_2301FA2F04D7E79ECC75B5722859EFC2" xlink:to="loc_us-gaap_StockholdersEquity_1038FAE9EA1D1725022BB572285AA31C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesOperatingPropertyAndEquipmentDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0E215E1B231852E4B7D2B5722899742C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BB795A63789E339C0439B5722898726A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0E215E1B231852E4B7D2B5722899742C" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BB795A63789E339C0439B5722898726A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_0DE11BFA5375E9EB3F0EB57228988253" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BB795A63789E339C0439B5722898726A" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_0DE11BFA5375E9EB3F0EB57228988253" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4F990DAFF45CBB344D76B57228998815_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0DE11BFA5375E9EB3F0EB57228988253" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4F990DAFF45CBB344D76B57228998815_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4F990DAFF45CBB344D76B57228998815" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0DE11BFA5375E9EB3F0EB57228988253" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4F990DAFF45CBB344D76B57228998815" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_63FC581CAE370D5FC7DDB57228993BA6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_4F990DAFF45CBB344D76B57228998815" xlink:to="loc_us-gaap_SubsidiariesMember_63FC581CAE370D5FC7DDB57228993BA6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_1D5DAABCC72EE7DD35E7B57228998CF5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BB795A63789E339C0439B5722898726A" xlink:to="loc_us-gaap_RangeAxis_1D5DAABCC72EE7DD35E7B57228998CF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_1D5DAABCC72EE7DD35E7B57228998CF5" xlink:to="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_1D5DAABCC72EE7DD35E7B57228998CF5" xlink:to="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_4F0C86C8956394E3DDF2B57228991943" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7" xlink:to="loc_us-gaap_MinimumMember_4F0C86C8956394E3DDF2B57228991943" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_9F67CC8C15ADEF025D89B57228997BD6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_C15534716D3FC9220C8AB572289924E7" xlink:to="loc_us-gaap_MaximumMember_9F67CC8C15ADEF025D89B57228997BD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2DEF8F4A75FCCBE1E2D3B57228998C40" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_BB795A63789E339C0439B5722898726A" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2DEF8F4A75FCCBE1E2D3B57228998C40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2DEF8F4A75FCCBE1E2D3B57228998C40" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_2DEF8F4A75FCCBE1E2D3B57228998C40" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AircraftEnginesAndRelatedRotablePartsMember" xlink:label="loc_aal_AircraftEnginesAndRelatedRotablePartsMember_47F3CC6F3F9A56DE21E9B5722899D459" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:to="loc_aal_AircraftEnginesAndRelatedRotablePartsMember_47F3CC6F3F9A56DE21E9B5722899D459" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BuildingAndBuildingImprovementsMember" xlink:label="loc_us-gaap_BuildingAndBuildingImprovementsMember_186BEF38C3C05089D72FB57228991C28" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:to="loc_us-gaap_BuildingAndBuildingImprovementsMember_186BEF38C3C05089D72FB57228991C28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_3930D7B0368EDE4969C0B57228996A4A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_3930D7B0368EDE4969C0B57228996A4A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CapitalizedSoftwareMember" xlink:label="loc_aal_CapitalizedSoftwareMember_38A243A861F230EC4017B5722899EC91" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_1443A88BC6DB3CEFE4B7B57228994244" xlink:to="loc_aal_CapitalizedSoftwareMember_38A243A861F230EC4017B5722899EC91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage_3734BC901B5866633D30B572289950E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0E215E1B231852E4B7D2B5722899742C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentSalvageValuePercentage_3734BC901B5866633D30B572289950E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_3A58CE729858F21303C1B572289911EE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0E215E1B231852E4B7D2B5722899742C" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_3A58CE729858F21303C1B572289911EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_1662BBA08F513E3B278DB57228995952" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_0E215E1B231852E4B7D2B5722899742C" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_1662BBA08F513E3B278DB57228995952" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_D714E1AECA856401DFCDB57228CB0546" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_D714E1AECA856401DFCDB57228CB0546" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_55902BFE8A8A13D98CE3B57228CB38C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_D714E1AECA856401DFCDB57228CB0546" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_55902BFE8A8A13D98CE3B57228CB38C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_08789E36BD2889A7BDC4B57228CB88B8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_55902BFE8A8A13D98CE3B57228CB38C6" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_08789E36BD2889A7BDC4B57228CB88B8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_08789E36BD2889A7BDC4B57228CB88B8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_55902BFE8A8A13D98CE3B57228CB38C6" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_08789E36BD2889A7BDC4B57228CB88B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_342C270155537F43DCE0B57228CBED80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_08789E36BD2889A7BDC4B57228CB88B8" xlink:to="loc_us-gaap_SubsidiariesMember_342C270155537F43DCE0B57228CBED80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_63C5229916A6F2F46774B57228CC6D8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_63C5229916A6F2F46774B57228CC6D8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketableSecuritiesAvailableForSaleSecuritiesPolicy" xlink:label="loc_us-gaap_MarketableSecuritiesAvailableForSaleSecuritiesPolicy_2F6D2D0C96D7CB23C875B57228CCB657" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_MarketableSecuritiesAvailableForSaleSecuritiesPolicy_2F6D2D0C96D7CB23C875B57228CCB657" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock" xlink:label="loc_aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock_70EE5810195B5C404B37B57228CCD23B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_aal_RestrictedCashAndShortTermInvestmentsPolicyPolicyTextBlock_70EE5810195B5C404B37B57228CCD23B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_C43F6216065635F4D617B57228CC30EE" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_InventoryPolicyTextBlock_C43F6216065635F4D617B57228CC30EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentPolicyTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_0CF7A84ACD00A568C26FB57228CCB423" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_0CF7A84ACD00A568C26FB57228CCB423" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="loc_us-gaap_IncomeTaxPolicyTextBlock_F396535206D7A7E7E497B57228CC2F7C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_IncomeTaxPolicyTextBlock_F396535206D7A7E7E497B57228CC2F7C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_A4F0E1B8870194746FF6B57228CCA8BF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsGoodwillPolicy_A4F0E1B8870194746FF6B57228CCA8BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_7A1B3A73E7EC3106AC9CB57228CC2243" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy_7A1B3A73E7EC3106AC9CB57228CC2243" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FrequentFlierProgramPolicyPolicyTextBlock" xlink:label="loc_us-gaap_FrequentFlierProgramPolicyPolicyTextBlock_5A5CD0F53861FCF51B37B57228CC4E54" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_FrequentFlierProgramPolicyPolicyTextBlock_5A5CD0F53861FCF51B37B57228CC4E54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="loc_us-gaap_RevenueRecognitionPolicyTextBlock_AFEF04A6834393F12972B57228CC97CF" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_RevenueRecognitionPolicyTextBlock_AFEF04A6834393F12972B57228CC97CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaintenanceCostPolicyPolicyTextBlock" xlink:label="loc_us-gaap_MaintenanceCostPolicyPolicyTextBlock_EC8DD12939F0E7C3E414B57228CC3B78" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_MaintenanceCostPolicyPolicyTextBlock_EC8DD12939F0E7C3E414B57228CC3B78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_D646971CDE117085DB8EB57228CC21A9" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpensesPolicyTextBlock_D646971CDE117085DB8EB57228CC21A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy" xlink:label="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_EE00574A3F2F64643D68B57228CC1660" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_ShareBasedCompensationOptionAndIncentivePlansPolicy_EE00574A3F2F64643D68B57228CC1660" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredChargesPolicyTextBlock" xlink:label="loc_us-gaap_DeferredChargesPolicyTextBlock_084233AC131763224BE2B57228D1E55A" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_DeferredChargesPolicyTextBlock_084233AC131763224BE2B57228D1E55A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_C1E6DBFE975BBE80B36AB57228D1DD9C" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_C1E6DBFE975BBE80B36AB57228D1DD9C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherCostAndExpenseOperatingPolicyTextBlock" xlink:label="loc_aal_OtherCostAndExpenseOperatingPolicyTextBlock_CADABAB86DDBBA9ED3DCB57228D2088E" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_aal_OtherCostAndExpenseOperatingPolicyTextBlock_CADABAB86DDBBA9ED3DCB57228D2088E" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RegionalExpensesPolicyPolicyTextBlock" xlink:label="loc_aal_RegionalExpensesPolicyPolicyTextBlock_385DA90D9C7354CB14ABB57228D283C3" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_aal_RegionalExpensesPolicyPolicyTextBlock_385DA90D9C7354CB14ABB57228D283C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_FC580B9BA7249D9B30E2B57228D21F23" xlink:type="locator" />
    <link:definitionArc order="18" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_A7ABD53B5F160BCAF7FFB57228CC1279" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_FC580B9BA7249D9B30E2B57228D21F23" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesRegionalExpensesDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_RegionalExpensesLineItems" xlink:label="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RegionalExpensesTable" xlink:label="loc_aal_RegionalExpensesTable_8174F59DA3E9328010D2B572286C1C7D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_aal_RegionalExpensesTable_8174F59DA3E9328010D2B572286C1C7D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_3AFC14F9B0C047A0D94AB572286CB336" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_8174F59DA3E9328010D2B572286C1C7D" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_3AFC14F9B0C047A0D94AB572286CB336" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_001EEC388397A2A79E6EB572286C56A2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3AFC14F9B0C047A0D94AB572286CB336" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_001EEC388397A2A79E6EB572286C56A2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_001EEC388397A2A79E6EB572286C56A2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3AFC14F9B0C047A0D94AB572286CB336" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_001EEC388397A2A79E6EB572286C56A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_E65AC0E73524790BD209B572286C3EB4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_001EEC388397A2A79E6EB572286C56A2" xlink:to="loc_us-gaap_SubsidiariesMember_E65AC0E73524790BD209B572286C3EB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_41254F53F7F1358D88A9B572286CA801" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_RegionalExpensesTable_8174F59DA3E9328010D2B572286C1C7D" xlink:to="loc_us-gaap_ProductOrServiceAxis_41254F53F7F1358D88A9B572286CA801" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_B7B21A83D23A8651B8CBB572286C127A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_41254F53F7F1358D88A9B572286CA801" xlink:to="loc_us-gaap_ProductsAndServicesDomain_B7B21A83D23A8651B8CBB572286C127A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_B7B21A83D23A8651B8CBB572286C127A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_41254F53F7F1358D88A9B572286CA801" xlink:to="loc_us-gaap_ProductsAndServicesDomain_B7B21A83D23A8651B8CBB572286C127A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegionalCarrierMember" xlink:label="loc_us-gaap_RegionalCarrierMember_BDF21F316C9A2C1DBD70B572286CDFA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_B7B21A83D23A8651B8CBB572286C127A" xlink:to="loc_us-gaap_RegionalCarrierMember_BDF21F316C9A2C1DBD70B572286CDFA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FuelCosts" xlink:label="loc_us-gaap_FuelCosts_8467F1024515795C9906B572286D59AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_FuelCosts_8467F1024515795C9906B572286D59AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_1276407B57CE76338AEAB572286D81BB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_LaborAndRelatedExpense_1276407B57CE76338AEAB572286D81BB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CapacityPurchases" xlink:label="loc_aal_CapacityPurchases_AF14F68A8FAD2E8D4D61B572286D1A64" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_aal_CapacityPurchases_AF14F68A8FAD2E8D4D61B572286D1A64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AircraftMaintenanceMaterialsAndRepairs" xlink:label="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_3BFDE3FA5BAA44E0FEBAB572286DC61D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_3BFDE3FA5BAA44E0FEBAB572286DC61D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LandingFeesAndOtherRentals" xlink:label="loc_us-gaap_LandingFeesAndOtherRentals_52FCF91AF2A84D350556B572286D261B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_LandingFeesAndOtherRentals_52FCF91AF2A84D350556B572286D261B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AircraftRental" xlink:label="loc_us-gaap_AircraftRental_ECF37918A83707BFE692B572286D704F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_AircraftRental_ECF37918A83707BFE692B572286D704F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_876D20BEF3D35D9317C4B572286DCE5E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_SellingAndMarketingExpense_876D20BEF3D35D9317C4B572286DCE5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_F3B257BDE4B9AE9FC75AB572286D6D7F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_DepreciationAndAmortization_F3B257BDE4B9AE9FC75AB572286D6D7F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestructuringAndOther" xlink:label="loc_aal_RestructuringAndOther_CF0EE52D8FE8B1F69564B572286D23CF" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_aal_RestructuringAndOther_CF0EE52D8FE8B1F69564B572286D23CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_0EB3A5A4F91C97A4554EB572286D72DD" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_0EB3A5A4F91C97A4554EB572286D72DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineCapacityPurchaseArrangements" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_5E4417B0F374AAB6043EB572286D7CE6" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_5E4417B0F374AAB6043EB572286D7CE6" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AirlineCapacityPurchaseArrangementsLeased" xlink:label="loc_aal_AirlineCapacityPurchaseArrangementsLeased_E6E6A1BF202B993EE420B572286DC544" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_RegionalExpensesLineItems_0D18A3768573BF069BC0B572286DE2FC" xlink:to="loc_aal_AirlineCapacityPurchaseArrangementsLeased_E6E6A1BF202B993EE420B572286DC544" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfAmortizableIntangibleAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3B115BD63B504BFF4885B5722889F909" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_392CCC8A8859C5BBEB02B5722888CE4F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3B115BD63B504BFF4885B5722889F909" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_392CCC8A8859C5BBEB02B5722888CE4F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2E373684073851A128B57228881FC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_392CCC8A8859C5BBEB02B5722888CE4F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2E373684073851A128B57228881FC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2E373684073851A128B57228881FC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_9A2E373684073851A128B57228881FC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AirportTakeOffAndLandingSlotsMember" xlink:label="loc_aal_AirportTakeOffAndLandingSlotsMember_60C03A25168E8053BAF2B57228887F82" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:to="loc_aal_AirportTakeOffAndLandingSlotsMember_60C03A25168E8053BAF2B57228887F82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CustomerRelationshipsMember" xlink:label="loc_us-gaap_CustomerRelationshipsMember_B47CF9DDBBF9B29C9862B5722888A384" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:to="loc_us-gaap_CustomerRelationshipsMember_B47CF9DDBBF9B29C9862B5722888A384" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MarketingRelatedIntangibleAssetsMember" xlink:label="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_9AD3491D9DABF6BCE8EAB5722888CDE2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:to="loc_us-gaap_MarketingRelatedIntangibleAssetsMember_9AD3491D9DABF6BCE8EAB5722888CDE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TradeNamesMember" xlink:label="loc_us-gaap_TradeNamesMember_BF3F3A0C0418923B2028B5722888E61C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:to="loc_us-gaap_TradeNamesMember_BF3F3A0C0418923B2028B5722888E61C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AirportGateLeaseholdRightsMember" xlink:label="loc_aal_AirportGateLeaseholdRightsMember_54AB934217E321A569C4B5722888B23A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_FED1B507CC545421C1C4B57228882263" xlink:to="loc_aal_AirportGateLeaseholdRightsMember_54AB934217E321A569C4B5722888B23A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_57D941889B63832550C9B572288893C3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_392CCC8A8859C5BBEB02B5722888CE4F" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_57D941889B63832550C9B572288893C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4B557332F714E1F5B07CB57228884249_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_57D941889B63832550C9B572288893C3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4B557332F714E1F5B07CB57228884249_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4B557332F714E1F5B07CB57228884249" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_57D941889B63832550C9B572288893C3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4B557332F714E1F5B07CB57228884249" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_EB006BBE937F496844A3B5722888433A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_4B557332F714E1F5B07CB57228884249" xlink:to="loc_us-gaap_SubsidiariesMember_EB006BBE937F496844A3B5722888433A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_B0E2AA4FBAC0F7386955B5722889FF96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3B115BD63B504BFF4885B5722889F909" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_B0E2AA4FBAC0F7386955B5722889FF96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_C75E5F8219D0BF7D507DB5722889AAA5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3B115BD63B504BFF4885B5722889F909" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_C75E5F8219D0BF7D507DB5722889AAA5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_63629E0E8E5125080C01B57228892073" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3B115BD63B504BFF4885B5722889F909" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_63629E0E8E5125080C01B57228892073" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesScheduleOfFutureAmortizationExpenseDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_84E4A3D1E7BFBB29793FB57228789FF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_84E4A3D1E7BFBB29793FB57228789FF0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_2477B828311DF84E06D2B5722878B8C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_84E4A3D1E7BFBB29793FB57228789FF0" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_2477B828311DF84E06D2B5722878B8C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_495759E3E78B26A8D127B572287D84A1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2477B828311DF84E06D2B5722878B8C3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_495759E3E78B26A8D127B572287D84A1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_495759E3E78B26A8D127B572287D84A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2477B828311DF84E06D2B5722878B8C3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_495759E3E78B26A8D127B572287D84A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_08A4C8D7839E78212103B572287D87DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_495759E3E78B26A8D127B572287D84A1" xlink:to="loc_us-gaap_SubsidiariesMember_08A4C8D7839E78212103B572287D87DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_D95CEC602BF79E1B97BBB572287D75AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_D95CEC602BF79E1B97BBB572287D75AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_3E906190D14A49906960B572287D8F96" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_3E906190D14A49906960B572287D8F96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_9BEF3E3FB2CE1BFE3206B572287D3467" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_9BEF3E3FB2CE1BFE3206B572287D3467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4BD17248C66ACF0CFB45B572287D6D79" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_4BD17248C66ACF0CFB45B572287D6D79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_2208B59F6B9A8CE0CD9AB572287DB164" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_2208B59F6B9A8CE0CD9AB572287DB164" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_54F6C6BC8965C6D3FFB6B572287E7029" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_54F6C6BC8965C6D3FFB6B572287E7029" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_B5EA1B7B0923CBFFDE5FB572287EAFEE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_66C1726AAC1BB80785A9B572287D7695" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_B5EA1B7B0923CBFFDE5FB572287EAFEE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/BasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable" xlink:label="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_CA6D55439389F432E99AB57228BB71E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_CA6D55439389F432E99AB57228BB71E8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_9151CDBDB482BD09EAB7B57228BBB2F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesTable_CA6D55439389F432E99AB57228BB71E8" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_9151CDBDB482BD09EAB7B57228BBB2F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_66312C1E25BFC002B40EB57228BB616D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9151CDBDB482BD09EAB7B57228BBB2F0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_66312C1E25BFC002B40EB57228BB616D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_66312C1E25BFC002B40EB57228BB616D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9151CDBDB482BD09EAB7B57228BBB2F0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_66312C1E25BFC002B40EB57228BB616D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_34CE6DBACCA0CCFEEA95B57228BBDECE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_66312C1E25BFC002B40EB57228BB616D" xlink:to="loc_us-gaap_SubsidiariesMember_34CE6DBACCA0CCFEEA95B57228BBDECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_7EC84BEC27D525FDFF8FB57228BBEFB8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_7EC84BEC27D525FDFF8FB57228BBEFB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_14E28A07CEF664FDD901B57228BBCD05" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTableTextBlock_14E28A07CEF664FDD901B57228BBCD05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_0E1B7559B41889C6E1A6B57228BBE287" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_0E1B7559B41889C6E1A6B57228BBE287" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ScheduleOfRegionalOperatingExpensesTableTextBlock" xlink:label="loc_aal_ScheduleOfRegionalOperatingExpensesTableTextBlock_C44CCE3D8E8131F4D253B57228BCC74C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_aal_ScheduleOfRegionalOperatingExpensesTableTextBlock_C44CCE3D8E8131F4D253B57228BCC74C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock" xlink:label="loc_us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_E621985626A91BFFAF6DB57228BCCD87" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_OrganizationBasisOfPresentationAndSummaryOfSignificantAccountingPoliciesLineItems_E9959FC2E37224145D49B57228BB7F91" xlink:to="loc_us-gaap_ScheduleOfNewAccountingPronouncementsAndChangesInAccountingPrinciplesTextBlock_E621985626A91BFFAF6DB57228BCCD87" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuarantees" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_CommitmentsandContingenciesLineItems" xlink:label="loc_aal_CommitmentsandContingenciesLineItems_22BE110D3C165E077A23B57226F613AC" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommitmentsandContingenciesTable" xlink:label="loc_aal_CommitmentsandContingenciesTable_FB1B0C1C5E41BB594DA9B57226F6E390" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_22BE110D3C165E077A23B57226F613AC" xlink:to="loc_aal_CommitmentsandContingenciesTable_FB1B0C1C5E41BB594DA9B57226F6E390" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_EE23BDF792E752778655B57226F652EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_CommitmentsandContingenciesTable_FB1B0C1C5E41BB594DA9B57226F6E390" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_EE23BDF792E752778655B57226F652EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_EB1E31BCBEFBFF94163EB57226F6118E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EE23BDF792E752778655B57226F652EB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_EB1E31BCBEFBFF94163EB57226F6118E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_EB1E31BCBEFBFF94163EB57226F6118E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EE23BDF792E752778655B57226F652EB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_EB1E31BCBEFBFF94163EB57226F6118E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_C3BDA269E7BBD8CD6DBEB57226F6F560" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_EB1E31BCBEFBFF94163EB57226F6118E" xlink:to="loc_us-gaap_SubsidiariesMember_C3BDA269E7BBD8CD6DBEB57226F6F560" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock" xlink:label="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_6A4FD392D61157B09AF1B57226F665CA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_22BE110D3C165E077A23B57226F613AC" xlink:to="loc_us-gaap_CommitmentsContingenciesAndGuaranteesTextBlock_6A4FD392D61157B09AF1B57226F665CA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_CF934AC8418770FB4D37B57226D73A13" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_CF934AC8418770FB4D37B57226D73A13" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_462D6FB09A373E8E4595B57226D71D98_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_CF934AC8418770FB4D37B57226D73A13" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_462D6FB09A373E8E4595B57226D71D98_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_462D6FB09A373E8E4595B57226D71D98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_CF934AC8418770FB4D37B57226D73A13" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_462D6FB09A373E8E4595B57226D71D98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_170DBE949825FF738CEFB57226D7273A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_462D6FB09A373E8E4595B57226D71D98" xlink:to="loc_us-gaap_SubsidiariesMember_170DBE949825FF738CEFB57226D7273A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CollateralAxis" xlink:label="loc_us-gaap_CollateralAxis_6976BCDACF528331F684B57226D7805A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_CollateralAxis_6976BCDACF528331F684B57226D7805A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CollateralDomain" xlink:label="loc_us-gaap_CollateralDomain_E38C082D2BA74A14BBD6B57226D77A15_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CollateralAxis_6976BCDACF528331F684B57226D7805A" xlink:to="loc_us-gaap_CollateralDomain_E38C082D2BA74A14BBD6B57226D77A15_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CollateralDomain" xlink:label="loc_us-gaap_CollateralDomain_E38C082D2BA74A14BBD6B57226D77A15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CollateralAxis_6976BCDACF528331F684B57226D7805A" xlink:to="loc_us-gaap_CollateralDomain_E38C082D2BA74A14BBD6B57226D77A15" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestrictedCashMember" xlink:label="loc_aal_RestrictedCashMember_4BC71A8C60A8BD2B4D73B57226D7FA06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CollateralDomain_E38C082D2BA74A14BBD6B57226D77A15" xlink:to="loc_aal_RestrictedCashMember_4BC71A8C60A8BD2B4D73B57226D7FA06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_81136B112767A0193B39B57226D79404" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_81136B112767A0193B39B57226D79404" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_81136B112767A0193B39B57226D79404" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_81136B112767A0193B39B57226D79404" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_CB0BB49E62D3600CCDD0B57226D709F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_CB0BB49E62D3600CCDD0B57226D709F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_936A403A66BE39BDAD07B57226D7BC67" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2E5285F5DF23AB37512AB57226D79218" xlink:to="loc_us-gaap_UnsecuredDebtMember_936A403A66BE39BDAD07B57226D7BC67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeAxis" xlink:label="loc_us-gaap_LeaseArrangementTypeAxis_C0DDF36BD5EC772FD0F8B57226D77877" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_LeaseArrangementTypeAxis_C0DDF36BD5EC772FD0F8B57226D77877" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:label="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LeaseArrangementTypeAxis_C0DDF36BD5EC772FD0F8B57226D77877" xlink:to="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:label="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LeaseArrangementTypeAxis_C0DDF36BD5EC772FD0F8B57226D77877" xlink:to="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EetcLeveragedLeaseFinancingsMember" xlink:label="loc_aal_EetcLeveragedLeaseFinancingsMember_5C84155EE0673C911D52B57226D7C12F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D" xlink:to="loc_aal_EetcLeveragedLeaseFinancingsMember_5C84155EE0673C911D52B57226D7C12F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialFacilityRevenueBondsMember" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_89C6F538B00CB1852413B57226D74CCA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LeaseArrangementTypeDomain_CCAA2C6F7C92225BC6B4B57226D7ED6D" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_89C6F538B00CB1852413B57226D74CCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_C1EAAD93735B89163D87B57226D7DD7D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_DebtInstrumentAxis_C1EAAD93735B89163D87B57226D7DD7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_C1EAAD93735B89163D87B57226D7DD7D" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_C1EAAD93735B89163D87B57226D7DD7D" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialFacilityRevenueBondsMember" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_7DA37BFA5C700AEE43ACB57226D839C0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_7DA37BFA5C700AEE43ACB57226D839C0" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes6.125Duein2018Member" xlink:label="loc_aal_SeniorNotes6.125Duein2018Member_AC68752996ECC7D6BCD3B57226D87903" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:to="loc_aal_SeniorNotes6.125Duein2018Member_AC68752996ECC7D6BCD3B57226D87903" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes5.50Duein2019Member" xlink:label="loc_aal_SeniorNotes5.50Duein2019Member_C945EF8CCC8984EC8010B57226D8A500" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:to="loc_aal_SeniorNotes5.50Duein2019Member_C945EF8CCC8984EC8010B57226D8A500" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes4.625Duein2020Member" xlink:label="loc_aal_SeniorNotes4.625Duein2020Member_EAC8466D981DDAB567D7B57226D8A50A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_FE6715FEBF5968EF547FB57226D7A3D3" xlink:to="loc_aal_SeniorNotes4.625Duein2020Member_EAC8466D981DDAB567D7B57226D8A50A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_1D68248AFE19D070D43AB57226D8DEF6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3E32F74EF2D6D7770077B57226D6BCF3" xlink:to="loc_us-gaap_ProductOrServiceAxis_1D68248AFE19D070D43AB57226D8DEF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_74521D1CF37528A82DFCB57226D8C4C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_1D68248AFE19D070D43AB57226D8DEF6" xlink:to="loc_us-gaap_ProductsAndServicesDomain_74521D1CF37528A82DFCB57226D8C4C3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_74521D1CF37528A82DFCB57226D8C4C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_1D68248AFE19D070D43AB57226D8DEF6" xlink:to="loc_us-gaap_ProductsAndServicesDomain_74521D1CF37528A82DFCB57226D8C4C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegionalCarrierMember" xlink:label="loc_us-gaap_RegionalCarrierMember_34421A8E5FC183134D2DB57226D8EF15" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_74521D1CF37528A82DFCB57226D8C4C3" xlink:to="loc_us-gaap_RegionalCarrierMember_34421A8E5FC183134D2DB57226D8EF15" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate" xlink:label="loc_aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate_0784CAD2250A5780B4F3B57226D88E2D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_aal_NumberOfAircraftOwnedEnhancedEquipmentTrustCertificate_0784CAD2250A5780B4F3B57226D88E2D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfOperatingAircraftLeasedFromTrustsInWhichCompanyHoldsSignificantVariableInterest" xlink:label="loc_aal_NumberOfOperatingAircraftLeasedFromTrustsInWhichCompanyHoldsSignificantVariableInterest_D7E2C7F9763827548908B57226D8A536" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_aal_NumberOfOperatingAircraftLeasedFromTrustsInWhichCompanyHoldsSignificantVariableInterest_D7E2C7F9763827548908B57226D8A536" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_C1A4D8FD801CB2FB5A58B57226D8C1FB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_us-gaap_LongTermDebt_C1A4D8FD801CB2FB5A58B57226D8C1FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_BEF1FF25F55AE0C69DFAB57226D87EED" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_BEF1FF25F55AE0C69DFAB57226D87EED" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LettersofCreditOutstandingandSuretyBondsAmount" xlink:label="loc_aal_LettersofCreditOutstandingandSuretyBondsAmount_6A5B343BE86781F6D502B57226D895F4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_aal_LettersofCreditOutstandingandSuretyBondsAmount_6A5B343BE86781F6D502B57226D895F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockCapitalSharesReservedForFutureIssuance" xlink:label="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_0AD89EE92283906B5147B57226D87EB3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_us-gaap_CommonStockCapitalSharesReservedForFutureIssuance_0AD89EE92283906B5147B57226D87EB3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfPutativeClassActionLawsuits" xlink:label="loc_aal_NumberOfPutativeClassActionLawsuits_6F3CC2DF1C1B11E3FD98B57226D827BE" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_aal_NumberOfPutativeClassActionLawsuits_6F3CC2DF1C1B11E3FD98B57226D827BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_E8E72D22F67BAF436B49B57226D85518" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_E8E72D22F67BAF436B49B57226D85518" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityNumberOfEmployees" xlink:label="loc_dei_EntityNumberOfEmployees_ADB70F27FA402B048246B57226D8529E" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_dei_EntityNumberOfEmployees_ADB70F27FA402B048246B57226D8529E" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CollectiveBargainingArrangementPercentageofEmployersParticipants" xlink:label="loc_aal_CollectiveBargainingArrangementPercentageofEmployersParticipants_F12C6A1F6282B759E58BB57226D938D1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_6DB19B754CDDBD0680EBB57226D8C8D7" xlink:to="loc_aal_CollectiveBargainingArrangementPercentageofEmployersParticipants_F12C6A1F6282B759E58BB57226D938D1" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesCapacityPurchaseAgreementsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5F24EEE988585091775CB64319CB3272" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5F24EEE988585091775CB64319CB3272" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_B19127417A1FEABA70C4B64319CCF3E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5F24EEE988585091775CB64319CB3272" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_B19127417A1FEABA70C4B64319CCF3E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FA1C8E4900BF6DE540DCB64319CC49EC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_B19127417A1FEABA70C4B64319CCF3E5" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FA1C8E4900BF6DE540DCB64319CC49EC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FA1C8E4900BF6DE540DCB64319CC49EC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_B19127417A1FEABA70C4B64319CCF3E5" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FA1C8E4900BF6DE540DCB64319CC49EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_9DD83443875C90BE9B49B64319CC4398" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_FA1C8E4900BF6DE540DCB64319CC49EC" xlink:to="loc_us-gaap_SubsidiariesMember_9DD83443875C90BE9B49B64319CC4398" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_A642DBBB1FD256FE8779B64319CC62F2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_5F24EEE988585091775CB64319CB3272" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_A642DBBB1FD256FE8779B64319CC62F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_A642DBBB1FD256FE8779B64319CC62F2" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_A642DBBB1FD256FE8779B64319CC62F2" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineCapacityPurchaseArrangementsMember" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_096C3E6109F06F3BF83EB64319CC38A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_096C3E6109F06F3BF83EB64319CC38A1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ObligationsRelatedToAircraftToBeLeasedMember" xlink:label="loc_aal_ObligationsRelatedToAircraftToBeLeasedMember_DE70C6D1E7E9A17B8442B64319CDDD81" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_183A2CBC89C6E105AA6BB64319CCAC8F" xlink:to="loc_aal_ObligationsRelatedToAircraftToBeLeasedMember_DE70C6D1E7E9A17B8442B64319CDDD81" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ReimbursementReceivablePercentageUnderAgreement" xlink:label="loc_aal_ReimbursementReceivablePercentageUnderAgreement_3A8D5426F3DAD8B25505B64319CDC0BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_aal_ReimbursementReceivablePercentageUnderAgreement_3A8D5426F3DAD8B25505B64319CDC0BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_D2F5AD3EE6C98BE1A383B64319CD6B89" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_D2F5AD3EE6C98BE1A383B64319CD6B89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInSecondYear" xlink:label="loc_us-gaap_PurchaseObligationDueInSecondYear_88138E81E081BEB41F3BB64319CD510D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueInSecondYear_88138E81E081BEB41F3BB64319CD510D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInThirdYear" xlink:label="loc_us-gaap_PurchaseObligationDueInThirdYear_04E35B9C5968CD7CDBF0B64319CD56B8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueInThirdYear_04E35B9C5968CD7CDBF0B64319CD56B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInFourthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFourthYear_E6B101601AB83EA3FD3FB64319CDA13F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueInFourthYear_E6B101601AB83EA3FD3FB64319CDA13F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFifthYear_2C7E69B8E8F1E286F851B64319CD174B" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueInFifthYear_2C7E69B8E8F1E286F851B64319CD174B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueAfterFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueAfterFifthYear_D4104A74A3D2188952E9B64319CDAA38" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligationDueAfterFifthYear_D4104A74A3D2188952E9B64319CDAA38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligation" xlink:label="loc_us-gaap_PurchaseObligation_B78B1642EB7E70FF1BB7B64319CD33AC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_052F9F4E6E5443FACEDCB64319CD0AEE" xlink:to="loc_us-gaap_PurchaseObligation_B78B1642EB7E70FF1BB7B64319CD33AC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesLongTermPurchaseCommitmentsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentLineItems" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTable" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTable_3BEAC0EAA2CB32BEBAF8B648B24BFE55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTable_3BEAC0EAA2CB32BEBAF8B648B24BFE55" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F88A722A8735E717B028B648B24B4D57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3BEAC0EAA2CB32BEBAF8B648B24BFE55" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F88A722A8735E717B028B648B24B4D57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_026986A84CDDCDDD953EB648B24BA2B5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F88A722A8735E717B028B648B24B4D57" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_026986A84CDDCDDD953EB648B24BA2B5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_026986A84CDDCDDD953EB648B24BA2B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F88A722A8735E717B028B648B24B4D57" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_026986A84CDDCDDD953EB648B24BA2B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_8A5711C96A4EF3D98FFCB648B24CDC41" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_026986A84CDDCDDD953EB648B24BA2B5" xlink:to="loc_us-gaap_SubsidiariesMember_8A5711C96A4EF3D98FFCB648B24CDC41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_C240036E36FAD8D496F3B648B24CC6F6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentTable_3BEAC0EAA2CB32BEBAF8B648B24BFE55" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_C240036E36FAD8D496F3B648B24CC6F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_A1505F3D2A70ACF63FE9B648B24C3724_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_C240036E36FAD8D496F3B648B24CC6F6" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_A1505F3D2A70ACF63FE9B648B24C3724_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_A1505F3D2A70ACF63FE9B648B24C3724" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis_C240036E36FAD8D496F3B648B24CC6F6" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_A1505F3D2A70ACF63FE9B648B24C3724" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_PurchaseAndLeaseCommitmentsMember" xlink:label="loc_aal_PurchaseAndLeaseCommitmentsMember_85C530066990C3A9C206B648B24CB644" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentCategoryOfItemPurchasedDomain_A1505F3D2A70ACF63FE9B648B24C3724" xlink:to="loc_aal_PurchaseAndLeaseCommitmentsMember_85C530066990C3A9C206B648B24CB644" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInNextTwelveMonths" xlink:label="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_36A9198A7F297085C129B648B24CC3D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueInNextTwelveMonths_36A9198A7F297085C129B648B24CC3D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInSecondYear" xlink:label="loc_us-gaap_PurchaseObligationDueInSecondYear_905AA32BA84E71F5D6F4B648B24C3B4A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueInSecondYear_905AA32BA84E71F5D6F4B648B24C3B4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInThirdYear" xlink:label="loc_us-gaap_PurchaseObligationDueInThirdYear_DE02C8289E2A57D1B2D5B648B24C225E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueInThirdYear_DE02C8289E2A57D1B2D5B648B24C225E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInFourthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFourthYear_31E5E0518FF7D14AC3BAB648B24CDCEA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueInFourthYear_31E5E0518FF7D14AC3BAB648B24CDCEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueInFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueInFifthYear_C74A3529FB7B826E58BFB648B24C5E91" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueInFifthYear_C74A3529FB7B826E58BFB648B24C5E91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligationDueAfterFifthYear" xlink:label="loc_us-gaap_PurchaseObligationDueAfterFifthYear_A7E426964FC3CC2D6C5DB648B24C9E1F" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligationDueAfterFifthYear_A7E426964FC3CC2D6C5DB648B24C9E1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PurchaseObligation" xlink:label="loc_us-gaap_PurchaseObligation_A3EB056BADB251327DE3B648B24C73AF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongTermPurchaseCommitmentLineItems_ED856EA00A79FDF1244AB648B24C2B34" xlink:to="loc_us-gaap_PurchaseObligation_A3EB056BADB251327DE3B648B24C73AF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesOperatingLeasesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasedAssetsLineItems" xlink:label="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfOperatingLeasedAssetsTable" xlink:label="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_3184263C231F89720C30B57226EAF5FF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_3184263C231F89720C30B57226EAF5FF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_41C391BF94FE0838E212B57226EA0EFE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_3184263C231F89720C30B57226EAF5FF" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_41C391BF94FE0838E212B57226EA0EFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_3127C03CF0D3BF84D059B57226EA4FAF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_41C391BF94FE0838E212B57226EA0EFE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_3127C03CF0D3BF84D059B57226EA4FAF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_3127C03CF0D3BF84D059B57226EA4FAF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_41C391BF94FE0838E212B57226EA0EFE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_3127C03CF0D3BF84D059B57226EA4FAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_CD9B38406AB7AD311A3BB57226EA9348" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_3127C03CF0D3BF84D059B57226EA4FAF" xlink:to="loc_us-gaap_SubsidiariesMember_CD9B38406AB7AD311A3BB57226EA9348" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FBCD1A8CDD029A9FEB53B57226EA4FD5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_3184263C231F89720C30B57226EAF5FF" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FBCD1A8CDD029A9FEB53B57226EA4FD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0107DE64C77D557BB5B4B57226EA56DA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FBCD1A8CDD029A9FEB53B57226EA4FD5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0107DE64C77D557BB5B4B57226EA56DA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0107DE64C77D557BB5B4B57226EA56DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_FBCD1A8CDD029A9FEB53B57226EA4FD5" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0107DE64C77D557BB5B4B57226EA56DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirTransportationEquipmentMember" xlink:label="loc_us-gaap_AirTransportationEquipmentMember_1CC40150EECBBC5590AFB57226EAD3BC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_0107DE64C77D557BB5B4B57226EA56DA" xlink:to="loc_us-gaap_AirTransportationEquipmentMember_1CC40150EECBBC5590AFB57226EAD3BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_566EACF652EECD210B68B57226EAD4B3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfOperatingLeasedAssetsTable_3184263C231F89720C30B57226EAF5FF" xlink:to="loc_us-gaap_RangeAxis_566EACF652EECD210B68B57226EAD4B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_566EACF652EECD210B68B57226EAD4B3" xlink:to="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_566EACF652EECD210B68B57226EAD4B3" xlink:to="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_52554A40DB9F4BC9A830B57226EA072C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3" xlink:to="loc_us-gaap_MinimumMember_52554A40DB9F4BC9A830B57226EA072C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_0EBDBA0829193A9B5C41B57226EBEA11" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_03BF639A10A8B4E304C0B57226EA44F3" xlink:to="loc_us-gaap_MaximumMember_0EBDBA0829193A9B5C41B57226EBEA11" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfAircraftOperatingUnderOperatingLease" xlink:label="loc_aal_NumberOfAircraftOperatingUnderOperatingLease_9F240A9910BC7A9243A3B57226EBC9BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_aal_NumberOfAircraftOperatingUnderOperatingLease_9F240A9910BC7A9243A3B57226EBC9BE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LesseeLeasingArrangementsOperatingLeasesRemainingTermOfContract" xlink:label="loc_aal_LesseeLeasingArrangementsOperatingLeasesRemainingTermOfContract_3FAF7F3E67062BBAA268B57226EBEE47" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_aal_LesseeLeasingArrangementsOperatingLeasesRemainingTermOfContract_3FAF7F3E67062BBAA268B57226EBEE47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_D4C32954B59638255F77B57226EB0926" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_D4C32954B59638255F77B57226EB0926" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5BD3392E8900039B901AB57226EBDC94" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_5BD3392E8900039B901AB57226EBDC94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_0E5079CDCA76E915AC16B57226EB53B3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_0E5079CDCA76E915AC16B57226EB53B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_80A153369C9D18BFA2E9B57226EB1856" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_80A153369C9D18BFA2E9B57226EB1856" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_92AA1BB0DF6B2C766159B57226EB7EF7" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_92AA1BB0DF6B2C766159B57226EB7EF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_3366C6E646BDCE329CD7B57226EBCEAA" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter_3366C6E646BDCE329CD7B57226EBCEAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDue" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5CFC9ACE2F4B2B57F851B57226EB9306" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDue_5CFC9ACE2F4B2B57F851B57226EB9306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_754881FEFCD21CF2CA87B57226EB9D38" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLeasedAssetsLineItems_92CD84572EBE9AECE4E9B57226EBE94F" xlink:to="loc_us-gaap_LeaseAndRentalExpense_754881FEFCD21CF2CA87B57226EB9D38" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesOtherPurchaseCommitmentsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationTable" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_10C5FE48B9D4601ED0A3B57226E4A353" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_10C5FE48B9D4601ED0A3B57226E4A353" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_24A71D54BCA2F7418869B57226E4C573" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_10C5FE48B9D4601ED0A3B57226E4A353" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_24A71D54BCA2F7418869B57226E4C573" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F04A6FD02993E21B0331B57226E49402_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_24A71D54BCA2F7418869B57226E4C573" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F04A6FD02993E21B0331B57226E49402_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F04A6FD02993E21B0331B57226E49402" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_24A71D54BCA2F7418869B57226E4C573" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F04A6FD02993E21B0331B57226E49402" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_1736A88020444EF57FE7B57226E4079B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F04A6FD02993E21B0331B57226E49402" xlink:to="loc_us-gaap_SubsidiariesMember_1736A88020444EF57FE7B57226E4079B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_3939FC5EB98F5DE652A2B57226E4C3D5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationTable_10C5FE48B9D4601ED0A3B57226E4A353" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_3939FC5EB98F5DE652A2B57226E4C3D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_BB2A897672B9B7CE65FCB57226E49007_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_3939FC5EB98F5DE652A2B57226E4C3D5" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_BB2A897672B9B7CE65FCB57226E49007_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain" xlink:label="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_BB2A897672B9B7CE65FCB57226E49007" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationByCategoryOfItemPurchasedAxis_3939FC5EB98F5DE652A2B57226E4C3D5" xlink:to="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_BB2A897672B9B7CE65FCB57226E49007" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_JetFuelFacilityConstructionProjectsandInformationTechnologySupportMember" xlink:label="loc_aal_JetFuelFacilityConstructionProjectsandInformationTechnologySupportMember_A8631DF4131697113ABFB57226E43CCE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnconditionalPurchaseObligationCategoryOfGoodsOrServicesAcquiredDomain_BB2A897672B9B7CE65FCB57226E49007" xlink:to="loc_aal_JetFuelFacilityConstructionProjectsandInformationTechnologySupportMember_A8631DF4131697113ABFB57226E43CCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_7A070F1EBC5F1A98E00FB57226E55E65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary_7A070F1EBC5F1A98E00FB57226E55E65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_1899CC074D2441F884E9B57226E5D646" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnSecondAnniversary_1899CC074D2441F884E9B57226E5D646" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_5B1FCB793522CFA0FFC2B57226E55420" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary_5B1FCB793522CFA0FFC2B57226E55420" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_ABAF659487A010BFA00CB57226E5BC6E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationLineItems_A3879216583E4C972410B57226E5B143" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFourthAnniversary_ABAF659487A010BFA00CB57226E5BC6E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/CommitmentsContingenciesAndGuaranteesTables" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_CommitmentsandContingenciesLineItems" xlink:label="loc_aal_CommitmentsandContingenciesLineItems_5AD08B9021218ADD0E7EB57226F4785D" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommitmentsandContingenciesTable" xlink:label="loc_aal_CommitmentsandContingenciesTable_AB579A6AD794A7E62824B57226F429F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_5AD08B9021218ADD0E7EB57226F4785D" xlink:to="loc_aal_CommitmentsandContingenciesTable_AB579A6AD794A7E62824B57226F429F5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_D218B7488344A4E73363B57226F414CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_CommitmentsandContingenciesTable_AB579A6AD794A7E62824B57226F429F5" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_D218B7488344A4E73363B57226F414CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CBD14D548852E5D29B9AB57226F4C0C8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_D218B7488344A4E73363B57226F414CD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CBD14D548852E5D29B9AB57226F4C0C8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CBD14D548852E5D29B9AB57226F4C0C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_D218B7488344A4E73363B57226F414CD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CBD14D548852E5D29B9AB57226F4C0C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_6BA5B22E339FC961DDF7B57226F44149" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_CBD14D548852E5D29B9AB57226F4C0C8" xlink:to="loc_us-gaap_SubsidiariesMember_6BA5B22E339FC961DDF7B57226F44149" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermPurchaseCommitmentTextBlock" xlink:label="loc_us-gaap_LongTermPurchaseCommitmentTextBlock_3D026A986A62EE081B3FB57226F4F853" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_5AD08B9021218ADD0E7EB57226F4785D" xlink:to="loc_us-gaap_LongTermPurchaseCommitmentTextBlock_3D026A986A62EE081B3FB57226F4F853" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_1B019B1DE0E34EA58F95B57226F440AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_5AD08B9021218ADD0E7EB57226F4785D" xlink:to="loc_us-gaap_ScheduleOfFutureMinimumRentalPaymentsForOperatingLeasesTableTextBlock_1B019B1DE0E34EA58F95B57226F440AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock" xlink:label="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock_1A42CC2C80D17B4CAC1EB57226F4C1FE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_CommitmentsandContingenciesLineItems_5AD08B9021218ADD0E7EB57226F4785D" xlink:to="loc_us-gaap_UnrecordedUnconditionalPurchaseObligationsDisclosureTextBlock_1A42CC2C80D17B4CAC1EB57226F4C1FE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_43D32479ACB31EB0E5EEB5722945ADE0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_BB60D4B42E973EA0C020B5722945DFE9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_43D32479ACB31EB0E5EEB5722945ADE0" xlink:to="loc_us-gaap_StatementTable_BB60D4B42E973EA0C020B5722945DFE9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_565093C4E4E6E5F5C98CB572294517C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_BB60D4B42E973EA0C020B5722945DFE9" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_565093C4E4E6E5F5C98CB572294517C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D0FB579691660789CF11B5722945B5FD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_565093C4E4E6E5F5C98CB572294517C9" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D0FB579691660789CF11B5722945B5FD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D0FB579691660789CF11B5722945B5FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_565093C4E4E6E5F5C98CB572294517C9" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D0FB579691660789CF11B5722945B5FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_37B327808FA2F0E0CD90B57229456E80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_D0FB579691660789CF11B5722945B5FD" xlink:to="loc_us-gaap_SubsidiariesMember_37B327808FA2F0E0CD90B57229456E80" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D32479ACB31EB0E5EEB5722945ADE0" xlink:to="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:to="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_D41B09741B2DF405BD31B5722945459E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_Cash_D41B09741B2DF405BD31B5722945459E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShortTermInvestments" xlink:label="loc_us-gaap_ShortTermInvestments_AA6AC174D07FCC4FD97DB5722945EFB3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_ShortTermInvestments_AA6AC174D07FCC4FD97DB5722945EFB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedCashAndInvestmentsCurrent" xlink:label="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_433706BF9D0531F6CDE5B57229456D41" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_RestrictedCashAndInvestmentsCurrent_433706BF9D0531F6CDE5B57229456D41" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ReceivablesNetCurrent" xlink:label="loc_us-gaap_ReceivablesNetCurrent_13F04B0C9449459D680CB5722945CB9B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_ReceivablesNetCurrent_13F04B0C9449459D680CB5722945CB9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent" xlink:label="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_008D980755A605317936B5722946FE2A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_008D980755A605317936B5722946FE2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineRelatedInventoryNet" xlink:label="loc_us-gaap_AirlineRelatedInventoryNet_DC834E06D2DF1309F12DB5722946860C" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_AirlineRelatedInventoryNet_DC834E06D2DF1309F12DB5722946860C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_CDB9F3610386734ED2C2B57229469D22" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_CDB9F3610386734ED2C2B57229469D22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_9C093FDDC8F0C5A3F3E3B5722946A9D3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_8196A2E612955583EA44B5722945D969" xlink:to="loc_us-gaap_AssetsCurrent_9C093FDDC8F0C5A3F3E3B5722946A9D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNetAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FlightEquipmentGross" xlink:label="loc_us-gaap_FlightEquipmentGross_FFD3D489D53A103D8271B5722946B515" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_us-gaap_FlightEquipmentGross_FFD3D489D53A103D8271B5722946B515" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_GroundPropertyAndEquipmentGross" xlink:label="loc_aal_GroundPropertyAndEquipmentGross_03EFBB3F3D3BBA9FFFC9B57229463EF1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_aal_GroundPropertyAndEquipmentGross_03EFBB3F3D3BBA9FFFC9B57229463EF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepositsOnFlightEquipment" xlink:label="loc_us-gaap_DepositsOnFlightEquipment_21FDD2A6EF00A41D7C04B572294637E3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_us-gaap_DepositsOnFlightEquipment_21FDD2A6EF00A41D7C04B572294637E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_1854B14BFC4B83BFDA8CB57229468446" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_1854B14BFC4B83BFDA8CB57229468446" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_081CC06E338BB2A435F9B572294654AC" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_081CC06E338BB2A435F9B572294654AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_A28EDDA0C553A5B73049B572294620C1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNetAbstract_6944A2C892D29416C23CB572294679B3" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_A28EDDA0C553A5B73049B572294620C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrentAbstract" xlink:label="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:to="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_1C9668CA4584DAA4C015B5722946DAE6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:to="loc_us-gaap_Goodwill_1C9668CA4584DAA4C015B5722946DAE6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_DF967719DD54AAFE9436B5722946F71A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_DF967719DD54AAFE9436B5722946F71A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_74D19FDADCBAF8F73F6CB57229461E4B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_74D19FDADCBAF8F73F6CB57229461E4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsMiscellaneousNoncurrent" xlink:label="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_A80C8F6BBCB586896430B5722947F629" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:to="loc_us-gaap_OtherAssetsMiscellaneousNoncurrent_A80C8F6BBCB586896430B5722947F629" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_69C7D5D1397DE703C655B57229479C37" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherAssetsNoncurrentAbstract_A2285803CD751451B5F4B57229464DD9" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_69C7D5D1397DE703C655B57229479C37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_5F4AD992B22C50CE4594B572294747DA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_10BD41D0C1C5263E3D25B5722945CCD0" xlink:to="loc_us-gaap_Assets_5F4AD992B22C50CE4594B572294747DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_43D32479ACB31EB0E5EEB5722945ADE0" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_0052A202F0DE6ED269A3B57229472B5A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_0052A202F0DE6ED269A3B57229472B5A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_80152F388A62480D76E4B57229479B68" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_AccountsPayableCurrent_80152F388A62480D76E4B57229479B68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_80FEFA009A9E0FFB34D4B5722947C318" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_80FEFA009A9E0FFB34D4B5722947C318" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirTrafficLiabilityCurrent" xlink:label="loc_us-gaap_AirTrafficLiabilityCurrent_F2DC3D495E87B59C69D5B57229479316" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_AirTrafficLiabilityCurrent_F2DC3D495E87B59C69D5B57229479316" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FrequentFlierLiabilityCurrent" xlink:label="loc_us-gaap_FrequentFlierLiabilityCurrent_D6C838999D6F27853987B5722947C8F6" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_FrequentFlierLiabilityCurrent_D6C838999D6F27853987B5722947C8F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_F38A10234D124E1113C0B5722947952E" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_F38A10234D124E1113C0B5722947952E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_D2203E179B311ECA0D76B57229470E5F" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_31D8128E3F68CACB63B4B5722947115F" xlink:to="loc_us-gaap_LiabilitiesCurrent_D2203E179B311ECA0D76B57229470E5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:to="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_4B0B9F6B8E0B202B1FD2B5722947843A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_4B0B9F6B8E0B202B1FD2B5722947843A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_CA6AAC948DCCC03687F0B572294812B4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_CA6AAC948DCCC03687F0B572294812B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_F7103F4D63DFAC67F3CAB5722948EFF6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_F7103F4D63DFAC67F3CAB5722948EFF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_400720931155BE3EC9CEB5722948F033" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_7F77956DC5D3C673366EB5722947F1DF" xlink:to="loc_us-gaap_LiabilitiesNoncurrent_400720931155BE3EC9CEB5722948F033" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_7C3A5D829F71CF64A67BB57229485FE7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:to="loc_us-gaap_CommitmentsAndContingencies_7C3A5D829F71CF64A67BB57229485FE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:to="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_6C3852E7391256C3AC51B572294860CE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:to="loc_us-gaap_CommonStockValue_6C3852E7391256C3AC51B572294860CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_256FDF193F656328D504B57229488C52" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_256FDF193F656328D504B57229488C52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1CCD1FA9BBF700A96C36B57229489DB3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1CCD1FA9BBF700A96C36B57229489DB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_6CE07A3BA9DF0DC49B81B57229480035" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_6CE07A3BA9DF0DC49B81B57229480035" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_C9399FBF818FB00FD7EAB5722948B2A3" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_3D6BB6B41B72C3FCBBBBB572294837F5" xlink:to="loc_us-gaap_StockholdersEquity_C9399FBF818FB00FD7EAB5722948B2A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_910E27432509070E9D57B57229482E12" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4AD439D799E548E8AA91B5722947003C" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_910E27432509070E9D57B57229482E12" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_5FFC07823851589FD151B57229203587" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_StatementTable_5FFC07823851589FD151B57229203587" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_FCF079F2DD71E2D9FC36B572292002EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5FFC07823851589FD151B57229203587" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_FCF079F2DD71E2D9FC36B572292002EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F572A8011C969B310CB8B5722920B310_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_FCF079F2DD71E2D9FC36B572292002EB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F572A8011C969B310CB8B5722920B310_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F572A8011C969B310CB8B5722920B310" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_FCF079F2DD71E2D9FC36B572292002EB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F572A8011C969B310CB8B5722920B310" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_3B80F3CD6747D930F596B57229215674" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F572A8011C969B310CB8B5722920B310" xlink:to="loc_us-gaap_SubsidiariesMember_3B80F3CD6747D930F596B57229215674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4C2E38200B581B244614B5722921A75C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4C2E38200B581B244614B5722921A75C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_FF19257D1F44457A499BB5722921A850" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_FF19257D1F44457A499BB5722921A850" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_ED0AF55015932393E14BB5722921CC4B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_ED0AF55015932393E14BB5722921CC4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_2BEB7B361EFD6D744BD6B57229214893" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_CommonStockSharesIssued_2BEB7B361EFD6D744BD6B57229214893" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_13E364DACD9E0D3B4EEDB5722921BAAF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A6263C3B03B2A8C99D40B5722921E2F8" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_13E364DACD9E0D3B4EEDB5722921BAAF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_5BF67A0039147FFA1DD0B572290CDBF1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_StatementTable_5BF67A0039147FFA1DD0B572290CDBF1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_C8273556B1054C5A2D1FB572290CD226" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5BF67A0039147FFA1DD0B572290CDBF1" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_C8273556B1054C5A2D1FB572290CD226" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_991465122AD12EB8074BB572290C3849_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C8273556B1054C5A2D1FB572290CD226" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_991465122AD12EB8074BB572290C3849_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_991465122AD12EB8074BB572290C3849" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C8273556B1054C5A2D1FB572290CD226" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_991465122AD12EB8074BB572290C3849" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_9BC7F14622D85AB025EAB572290DA234" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_991465122AD12EB8074BB572290C3849" xlink:to="loc_us-gaap_SubsidiariesMember_9BC7F14622D85AB025EAB572290DA234" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_0AFFE545F51A3633E7A9B57229123E58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:to="loc_us-gaap_NetIncomeLoss_0AFFE545F51A3633E7A9B57229123E58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MainlineAndExpressDepreciationAndAmortization" xlink:label="loc_aal_MainlineAndExpressDepreciationAndAmortization_1AC9434EFF7BA2E133B3B57229131BB4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_aal_MainlineAndExpressDepreciationAndAmortization_1AC9434EFF7BA2E133B3B57229131BB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_B85CC4EBAD77EC9603E6B572291392A4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_B85CC4EBAD77EC9603E6B572291392A4" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AmortizationOfDebtDiscountPremiumAndLeasedAssets" xlink:label="loc_aal_AmortizationOfDebtDiscountPremiumAndLeasedAssets_3CFCD3273112BF94DD4FB5722913F9B0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_aal_AmortizationOfDebtDiscountPremiumAndLeasedAssets_3CFCD3273112BF94DD4FB5722913F9B0" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialChargesNonCash" xlink:label="loc_aal_SpecialChargesNonCash_9A52C5AEBC2E9BA61D90B57229147992" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_aal_SpecialChargesNonCash_9A52C5AEBC2E9BA61D90B57229147992" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_C6A3B9DD77B32358E7B2B5722914D382" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_C6A3B9DD77B32358E7B2B5722914D382" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_890693A2D0B9617F7592B57229140E83" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_us-gaap_ShareBasedCompensation_890693A2D0B9617F7592B57229140E83" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNoncashIncomeExpense" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_9FB9424C66461C602570B57229145E36" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_2914D5255A2E59D9A3F7B5722912E5AF" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_9FB9424C66461C602570B57229145E36" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_AE3840CE7D4AF602F569B57229152957" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_AE3840CE7D4AF602F569B57229152957" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherCurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_EA38F4C8858A23082272B57229165CF5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherCurrentAssets_EA38F4C8858A23082272B57229165CF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_6F203A69FCCCE057BF85B57229162673" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_6F203A69FCCCE057BF85B57229162673" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAirTrafficLiability1" xlink:label="loc_us-gaap_IncreaseDecreaseInAirTrafficLiability1_A8DA954398339DB81A40B57229164C75" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInAirTrafficLiability1_A8DA954398339DB81A40B57229164C75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInDueFromRelatedParties" xlink:label="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_445B84FC16A831243265B5722916133E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInDueFromRelatedParties_445B84FC16A831243265B5722916133E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInFrequentFlyerLiability" xlink:label="loc_us-gaap_IncreaseDecreaseInFrequentFlyerLiability_249C85FDF1D96FA3DA25B57229164B45" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInFrequentFlyerLiability_249C85FDF1D96FA3DA25B57229164B45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInPensionPlanObligations" xlink:label="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_4C08C1B12AA1271D6B6AB5722916D2BB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInPensionPlanObligations_4C08C1B12AA1271D6B6AB5722916D2BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_BAB52FD2A54870214BCAB57229165096" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_575C118B10337EBBEF79B5722914FFC2" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_BAB52FD2A54870214BCAB57229165096" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_B8262887A3063748B0CCB5722916087F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_BF85743EC0F5104CEE88B572290DD6CC" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_B8262887A3063748B0CCB5722916087F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireProductiveAssets" xlink:label="loc_us-gaap_PaymentsToAcquireProductiveAssets_9EBA695E7E34E423BCF6B5722916A83D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_PaymentsToAcquireProductiveAssets_9EBA695E7E34E423BCF6B5722916A83D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeaseBackTransactions" xlink:label="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeaseBackTransactions_6842333FC466971B8F87B572291748BA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_aal_ProceedsFromSaleOfPropertyPlantAndEquipmentAndSaleLeaseBackTransactions_6842333FC466971B8F87B572291748BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireShortTermInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_9AAFB9D3C3A1D3201CBAB5722917F5A9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_9AAFB9D3C3A1D3201CBAB5722917F5A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_3E2307431910718DF9F8B57229179497" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_3E2307431910718DF9F8B57229179497" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInRestrictedCashAndInvestments" xlink:label="loc_us-gaap_IncreaseDecreaseInRestrictedCashAndInvestments_609EC34531D22FAF5BB6B572291753B0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_IncreaseDecreaseInRestrictedCashAndInvestments_609EC34531D22FAF5BB6B572291753B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquireEquityMethodInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_79D5FC3C50BEE4F15217B57229178EC8" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_PaymentsToAcquireEquityMethodInvestments_79D5FC3C50BEE4F15217B57229178EC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherInvestments" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_83BB99E14DEDFCD2ABA7B5722917B6A8" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherInvestments_83BB99E14DEDFCD2ABA7B5722917B6A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3A8DAE0D5D8D830CB4B6B57229173E6A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_640B5A99D7CC683B3F8EB5722916C51B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_3A8DAE0D5D8D830CB4B6B57229173E6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_EA4B631F788E1E8A339EB5722917E619" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_EA4B631F788E1E8A339EB5722917E619" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_19DA7833DD4B70320A1AB5722917031B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_RepaymentsOfDebtAndCapitalLeaseObligations_19DA7833DD4B70320A1AB5722917031B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_203209CB252C19C3BAABB5722917EBDE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_203209CB252C19C3BAABB5722917EBDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_5C4339EF364CE533D9A2B5722917027A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_5C4339EF364CE533D9A2B5722917027A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsOfOrdinaryDividends" xlink:label="loc_us-gaap_PaymentsOfOrdinaryDividends_E5B19B9950BD7010647FB5722917584F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_PaymentsOfOrdinaryDividends_E5B19B9950BD7010647FB5722917584F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromPaymentsForOtherFinancingActivities" xlink:label="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_467A87072537B72939E9B5722917B012" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_ProceedsFromPaymentsForOtherFinancingActivities_467A87072537B72939E9B5722917B012" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_492BD251604291BA45FDB57229170708" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_B8A1C6C1EFC25F91265EB5722917047B" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_492BD251604291BA45FDB57229170708" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashPeriodIncreaseDecrease_18857C65FB60088E9160B57229187B92" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_CashPeriodIncreaseDecrease_18857C65FB60088E9160B57229187B92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Cash" xlink:label="loc_us-gaap_Cash_2C5C6FBBC445D569A459B5722918878F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_2192ACB75DD4CF0B6528B572290D2558" xlink:to="loc_us-gaap_Cash_2C5C6FBBC445D569A459B5722918878F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_0A06EED267528047A863B57229583200" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_92B048E6D36131E72E5AB5722957D6D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_0A06EED267528047A863B57229583200" xlink:to="loc_us-gaap_StatementTable_92B048E6D36131E72E5AB5722957D6D1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_10FCCAF03CFD5E7EB14EB5722957639F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_92B048E6D36131E72E5AB5722957D6D1" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_10FCCAF03CFD5E7EB14EB5722957639F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7D80E9798E33785F2200B5722957A7C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10FCCAF03CFD5E7EB14EB5722957639F" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7D80E9798E33785F2200B5722957A7C3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7D80E9798E33785F2200B5722957A7C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10FCCAF03CFD5E7EB14EB5722957639F" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7D80E9798E33785F2200B5722957A7C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_15BD4F6A28179AB970E1B57229571A57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_7D80E9798E33785F2200B5722957A7C3" xlink:to="loc_us-gaap_SubsidiariesMember_15BD4F6A28179AB970E1B57229571A57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_9708AC3B67DBA04389BDB5722958F329" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0A06EED267528047A863B57229583200" xlink:to="loc_us-gaap_NetIncomeLoss_9708AC3B67DBA04389BDB5722958F329" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_5282BF2FF2F061CD3356B57229581DC2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0A06EED267528047A863B57229583200" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_5282BF2FF2F061CD3356B57229581DC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract" xlink:label="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_5922FD9C42F0B039981DB5722958349A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_5282BF2FF2F061CD3356B57229581DC2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_5922FD9C42F0B039981DB5722958349A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_D13CFE149E5CF5862CD2B57229587891" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_5922FD9C42F0B039981DB5722958349A" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_D13CFE149E5CF5862CD2B57229587891" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_9971BC0325AE72E5F0A0B5722958BA31" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParentAbstract_5922FD9C42F0B039981DB5722958349A" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax_9971BC0325AE72E5F0A0B5722958BA31" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesandDerivativeAdjustmentNetofTax" xlink:label="loc_aal_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesandDerivativeAdjustmentNetofTax_108C3A622955D0CCD48FB5722958C740" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_5282BF2FF2F061CD3356B57229581DC2" xlink:to="loc_aal_OtherComprehensiveIncomeLossAvailableforsaleSecuritiesandDerivativeAdjustmentNetofTax_108C3A622955D0CCD48FB5722958C740" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_576A83CB3FBE69E187ACB5722958D4CF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_5282BF2FF2F061CD3356B57229581DC2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_576A83CB3FBE69E187ACB5722958D4CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_2D09D290E399EDFE3A3EB57229582841" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_0A06EED267528047A863B57229583200" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_2D09D290E399EDFE3A3EB57229582841" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_CDF27F9780DF3812654FB5722970518E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_StatementTable_CDF27F9780DF3812654FB5722970518E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_49A11C143ACA026CF4D5B5722970BEBB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_CDF27F9780DF3812654FB5722970518E" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_49A11C143ACA026CF4D5B5722970BEBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BB3D5238A1AE3593545EB5722970166D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_49A11C143ACA026CF4D5B5722970BEBB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BB3D5238A1AE3593545EB5722970166D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BB3D5238A1AE3593545EB5722970166D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_49A11C143ACA026CF4D5B5722970BEBB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BB3D5238A1AE3593545EB5722970166D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_65B76ADD8B122559CC00B57229708231" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_BB3D5238A1AE3593545EB5722970166D" xlink:to="loc_us-gaap_SubsidiariesMember_65B76ADD8B122559CC00B57229708231" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNetAbstract" xlink:label="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PassengerRevenueMainline" xlink:label="loc_us-gaap_PassengerRevenueMainline_BE72FAA8C117DC12C4D7B572297088E9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:to="loc_us-gaap_PassengerRevenueMainline_BE72FAA8C117DC12C4D7B572297088E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PassengerRevenueRegional" xlink:label="loc_us-gaap_PassengerRevenueRegional_093038533F816F60F97EB57229715EAD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:to="loc_us-gaap_PassengerRevenueRegional_093038533F816F60F97EB57229715EAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CargoAndFreightRevenue" xlink:label="loc_us-gaap_CargoAndFreightRevenue_683E7CE82FAEC5D382DFB572297153DA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:to="loc_us-gaap_CargoAndFreightRevenue_683E7CE82FAEC5D382DFB572297153DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSalesRevenueNet" xlink:label="loc_us-gaap_OtherSalesRevenueNet_8F824DC06D06456BBA97B5722971CD06" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:to="loc_us-gaap_OtherSalesRevenueNet_8F824DC06D06456BBA97B5722971CD06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_5E5AE1957387ED4F4F49B5722971CEFD" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SalesRevenueNetAbstract_C839CAA9871630E0C6E7B57229707061" xlink:to="loc_us-gaap_SalesRevenueNet_5E5AE1957387ED4F4F49B5722971CEFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FuelCosts" xlink:label="loc_us-gaap_FuelCosts_8FE4B48946F46069C51FB5722971040C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_FuelCosts_8FE4B48946F46069C51FB5722971040C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LaborAndRelatedExpense" xlink:label="loc_us-gaap_LaborAndRelatedExpense_C07C9BAD388FF031D322B57229719A68" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_LaborAndRelatedExpense_C07C9BAD388FF031D322B57229719A68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineCapacityPurchaseArrangements" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_538A024EB513E62F0CD7B5722976046B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_538A024EB513E62F0CD7B5722976046B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AircraftMaintenanceMaterialsAndRepairs" xlink:label="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_0CBF1C8D959FBE6B4173B5722976AAB2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_AircraftMaintenanceMaterialsAndRepairs_0CBF1C8D959FBE6B4173B5722976AAB2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LandingFeesAndOtherRentals" xlink:label="loc_us-gaap_LandingFeesAndOtherRentals_DF4B0AE107824DED45F8B57229765886" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_LandingFeesAndOtherRentals_DF4B0AE107824DED45F8B57229765886" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AircraftRental" xlink:label="loc_us-gaap_AircraftRental_3916973612A9EA86EC1AB57229772114" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_AircraftRental_3916973612A9EA86EC1AB57229772114" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_6B7200B154AE2BD8A01FB5722977A1B4" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_SellingAndMarketingExpense_6B7200B154AE2BD8A01FB5722977A1B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationAndAmortization" xlink:label="loc_us-gaap_DepreciationAndAmortization_490C8D98FECF43305C18B572297785EF" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_DepreciationAndAmortization_490C8D98FECF43305C18B572297785EF" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestructuringAndOtherMainline" xlink:label="loc_aal_RestructuringAndOtherMainline_5820A42F7E1575C41EC3B5722977023B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_aal_RestructuringAndOtherMainline_5820A42F7E1575C41EC3B5722977023B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherCostAndExpenseOperating" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_1DC01CF1FA54A32237F6B5722977E6B0" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_1DC01CF1FA54A32237F6B5722977E6B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_F40AAF761AC4A82BB2EDB5722977A75E" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_C4889F009B04B7797D7CB5722971AA1C" xlink:to="loc_us-gaap_CostsAndExpenses_F40AAF761AC4A82BB2EDB5722977A75E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_2F3A932E18B4E015B4C0B57229779727" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_OperatingIncomeLoss_2F3A932E18B4E015B4C0B57229779727" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonoperatingIncomeExpenseAbstract" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_8474F93A11AB14412A06B57229776C9B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:to="loc_us-gaap_InvestmentIncomeInterest_8474F93A11AB14412A06B57229776C9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_EB139F5968D64CDD66E8B572297786B4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:to="loc_us-gaap_InterestExpense_EB139F5968D64CDD66E8B572297786B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_0BBA3C221A679492DDF1B5722977AFF4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_0BBA3C221A679492DDF1B5722977AFF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_DF92229EDFE11064C4E0B5722977DC21" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NonoperatingIncomeExpenseAbstract_DAA642A95EAB8B2C2A88B57229770B6D" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_DF92229EDFE11064C4E0B5722977DC21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_F83515CD52B64A065D4DB572297770FA" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_F83515CD52B64A065D4DB572297770FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_447829981C3F9A107DEEB57229777CD3" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_447829981C3F9A107DEEB57229777CD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_D2DE3442820DC6076B3CB57229774656" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_NetIncomeLoss_D2DE3442820DC6076B3CB57229774656" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_2288AB2B0EDC50E633FEB57229774DD3" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_EarningsPerShareAbstract_2288AB2B0EDC50E633FEB57229774DD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_55465BA85E4BD2889979B5722978969D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_2288AB2B0EDC50E633FEB57229774DD3" xlink:to="loc_us-gaap_EarningsPerShareBasic_55465BA85E4BD2889979B5722978969D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_9AC22290080AAC0574A8B57229789D97" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_2288AB2B0EDC50E633FEB57229774DD3" xlink:to="loc_us-gaap_EarningsPerShareDiluted_9AC22290080AAC0574A8B57229789D97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_AF7EBCBA253C7043C664B57229782E26" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_AF7EBCBA253C7043C664B57229782E26" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_AEE96B02ADC901206E23B5722978C7B2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_AF7EBCBA253C7043C664B57229782E26" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_AEE96B02ADC901206E23B5722978C7B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_25DF61785E7B3C031C90B5722978FBD3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_AF7EBCBA253C7043C664B57229782E26" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_25DF61785E7B3C031C90B5722978FBD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_1649AFF151D197F4DBEFB57229780483" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_4C264B7807A7B94CD49DB5722970735A" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_1649AFF151D197F4DBEFB57229780483" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_A5DF31978F21114CDE00B5B6C1815F0E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_476244F2D0FBFE0DC9D6B5B6C18008D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_A5DF31978F21114CDE00B5B6C1815F0E" xlink:to="loc_us-gaap_StatementTable_476244F2D0FBFE0DC9D6B5B6C18008D7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_33F6964CBF40BF699131B5B6C1807591" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_476244F2D0FBFE0DC9D6B5B6C18008D7" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_33F6964CBF40BF699131B5B6C1807591" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_33F6964CBF40BF699131B5B6C1807591" xlink:to="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_33F6964CBF40BF699131B5B6C1807591" xlink:to="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_D83CF4EFD6222203BC2BB5B6C180571A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:to="loc_us-gaap_CommonStockMember_D83CF4EFD6222203BC2BB5B6C180571A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_7711943268E686F47F7EB5B6C1802D42" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_7711943268E686F47F7EB5B6C1802D42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6318E6DEFDD8AE2A3916B5B6C18052E5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_6318E6DEFDD8AE2A3916B5B6C18052E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_567B8DA552390A04B14AB5B6C1800DCB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72CA8692ED5E9B33A318B5B6C1808F28" xlink:to="loc_us-gaap_RetainedEarningsMember_567B8DA552390A04B14AB5B6C1800DCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_3087A6EDDB218AC05B52B5B6C180821E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_476244F2D0FBFE0DC9D6B5B6C18008D7" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_3087A6EDDB218AC05B52B5B6C180821E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_323EA10A87AF20F4B173B5B6C180F173_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3087A6EDDB218AC05B52B5B6C180821E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_323EA10A87AF20F4B173B5B6C180F173_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_323EA10A87AF20F4B173B5B6C180F173" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3087A6EDDB218AC05B52B5B6C180821E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_323EA10A87AF20F4B173B5B6C180F173" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_19CF3A221EB1524BB479B5B6C1814395" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_323EA10A87AF20F4B173B5B6C180F173" xlink:to="loc_us-gaap_SubsidiariesMember_19CF3A221EB1524BB479B5B6C1814395" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_A5DF31978F21114CDE00B5B6C1815F0E" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_B772F97815490D9351C9B5B6C1810E42" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_StockholdersEquity_B772F97815490D9351C9B5B6C1810E42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_BE15EB6EF11849B904BFB5B6C1813E4A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_NetIncomeLoss_BE15EB6EF11849B904BFB5B6C1813E4A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_0F4526C9C92FFA8F75ADB5B6C181FBC3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax_0F4526C9C92FFA8F75ADB5B6C181FBC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_1BAA68E754E01A3989C8B5B6C181BFF1" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesBeforeTax_1BAA68E754E01A3989C8B5B6C181BFF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossTax_6DABC265D8B9979C97ADB5B6C181836A" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossTax_6DABC265D8B9979C97ADB5B6C181836A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_345AEAD2BE04F4004FA3B5B6C18142B0" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_345AEAD2BE04F4004FA3B5B6C18142B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_ADCA69FA4A776027AB4DB5B6C181F24C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_ADCA69FA4A776027AB4DB5B6C181F24C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DividendsCommonStock" xlink:label="loc_us-gaap_DividendsCommonStock_4D1AD2509FDAF13561CAB5B6C1819F0C" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_DividendsCommonStock_4D1AD2509FDAF13561CAB5B6C1819F0C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaims" xlink:label="loc_aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaims_FDC3D83BC71003E32677B5B6C181A983" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_aal_AdjustmentsToAdditionalPaidInCapitalSettlementOfSingleDipUnsecuredClaims_FDC3D83BC71003E32677B5B6C181A983" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4BC8D2A2D96FF0155591B5B6C181041F" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_4BC8D2A2D96FF0155591B5B6C181041F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalOther" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_C1EEBD2E62A5D479A7B3B5B6C1822A61" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalOther_C1EEBD2E62A5D479A7B3B5B6C1822A61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification" xlink:label="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_36D18757244654896FFEB5B6C1821ECE" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification_36D18757244654896FFEB5B6C1821ECE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_9F7C9BE963920D86A1E7B5B6C182611C" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_D5D88031996B4BEE4CECB5B6C1811CB5" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax_9F7C9BE963920D86A1E7B5B6C182611C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ConsolidatedStatementsOfStockholdersEquityParenthetical" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_C70D83A38D9E1ADC033CB57227F670B1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_85A482C3FC18494440C6B57227F532D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_C70D83A38D9E1ADC033CB57227F670B1" xlink:to="loc_us-gaap_DebtInstrumentTable_85A482C3FC18494440C6B57227F532D9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_368E397875A0F739ECB3B57227F508D8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_85A482C3FC18494440C6B57227F532D9" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_368E397875A0F739ECB3B57227F508D8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D68B414B9E2EFECB6ED4B57227F62A3B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_368E397875A0F739ECB3B57227F508D8" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D68B414B9E2EFECB6ED4B57227F62A3B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D68B414B9E2EFECB6ED4B57227F62A3B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_368E397875A0F739ECB3B57227F508D8" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D68B414B9E2EFECB6ED4B57227F62A3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_486AA72CD36597E3E82EB57227F6F7DF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_D68B414B9E2EFECB6ED4B57227F62A3B" xlink:to="loc_us-gaap_SubsidiariesMember_486AA72CD36597E3E82EB57227F6F7DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="loc_us-gaap_DebtDisclosureTextBlock_ABA061A1C78C320C17E5B57227F66DF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_C70D83A38D9E1ADC033CB57227F670B1" xlink:to="loc_us-gaap_DebtDisclosureTextBlock_ABA061A1C78C320C17E5B57227F66DF5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/Debt20132014And2016CreditFacilitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E761BD52C6D3175FB4E0B57227D6B4B1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E761BD52C6D3175FB4E0B57227D6B4B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_139F92A6BA96BC58F5DEB57227D62B51_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E761BD52C6D3175FB4E0B57227D6B4B1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_139F92A6BA96BC58F5DEB57227D62B51_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_139F92A6BA96BC58F5DEB57227D62B51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E761BD52C6D3175FB4E0B57227D6B4B1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_139F92A6BA96BC58F5DEB57227D62B51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_693A3D5DFA2070A371FDB57227D6BF4C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_139F92A6BA96BC58F5DEB57227D62B51" xlink:to="loc_us-gaap_SubsidiariesMember_693A3D5DFA2070A371FDB57227D6BF4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_BE40A63F421883C1D3B3B57227D7D4A2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_BE40A63F421883C1D3B3B57227D7D4A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AB9B328724A0130B6AC4B57227D7A3D9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_BE40A63F421883C1D3B3B57227D7D4A2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AB9B328724A0130B6AC4B57227D7A3D9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_AB9B328724A0130B6AC4B57227D7A3D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_BE40A63F421883C1D3B3B57227D7D4A2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_AB9B328724A0130B6AC4B57227D7A3D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_9A162ACAFE43507C2222B57227D7DCA8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_AB9B328724A0130B6AC4B57227D7A3D9" xlink:to="loc_us-gaap_SecuredDebtMember_9A162ACAFE43507C2222B57227D7DCA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_64C21777B712213E5508B57227D7FE18" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:to="loc_us-gaap_CreditFacilityAxis_64C21777B712213E5508B57227D7FE18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_64C21777B712213E5508B57227D7FE18" xlink:to="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_64C21777B712213E5508B57227D7FE18" xlink:to="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_TermLoanFacilityMember" xlink:label="loc_aal_TermLoanFacilityMember_5EF569DF9DB5918F79F9B57227D7BE96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D" xlink:to="loc_aal_TermLoanFacilityMember_5EF569DF9DB5918F79F9B57227D7BE96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_782D7EC4ABAB7322032EB57227D78AB8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_782D7EC4ABAB7322032EB57227D78AB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LetterOfCreditMember" xlink:label="loc_us-gaap_LetterOfCreditMember_5F1C4548FAF437629861B57227D7E298" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_34C1F41C8DEBDD122589B57227D7BC8D" xlink:to="loc_us-gaap_LetterOfCreditMember_5F1C4548FAF437629861B57227D7E298" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_0CA5B3237EB999E35356B57227D72079" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:to="loc_us-gaap_DebtInstrumentAxis_0CA5B3237EB999E35356B57227D72079" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_0CA5B3237EB999E35356B57227D72079" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_0CA5B3237EB999E35356B57227D72079" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2013Member" xlink:label="loc_aal_CreditFacility2013Member_C8E77E4EB988C8061260B57227D7A87B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:to="loc_aal_CreditFacility2013Member_C8E77E4EB988C8061260B57227D7A87B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2014Member" xlink:label="loc_aal_CreditFacility2014Member_D0CE222380B129B401AFB57227D70E6F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:to="loc_aal_CreditFacility2014Member_D0CE222380B129B401AFB57227D70E6F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityApril2016Member" xlink:label="loc_aal_CreditFacilityApril2016Member_22F2332E7EE1199524D7B57227D7A4CA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:to="loc_aal_CreditFacilityApril2016Member_22F2332E7EE1199524D7B57227D7A4CA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityDecember2016Member" xlink:label="loc_aal_CreditFacilityDecember2016Member_31CD999787349CEE0F56B57227D79998" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_98EC74BC85CFA88193E3B57227D7200F" xlink:to="loc_aal_CreditFacilityDecember2016Member_31CD999787349CEE0F56B57227D79998" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_08EA859E48CFC0F55D0AB57227D72E64" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_ED6B7AA1CDBECF8C444EB57227D6210E" xlink:to="loc_us-gaap_VariableRateAxis_08EA859E48CFC0F55D0AB57227D72E64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_08EA859E48CFC0F55D0AB57227D72E64" xlink:to="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_08EA859E48CFC0F55D0AB57227D72E64" xlink:to="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5BF9D5BA2772FAB08D9CB57227D8202F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5BF9D5BA2772FAB08D9CB57227D8202F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BaseRateMember" xlink:label="loc_us-gaap_BaseRateMember_BAF4E798D35F98BFA06BB57227D8CDA0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_9AE7275B19AE35B27A3CB57227D744DB" xlink:to="loc_us-gaap_BaseRateMember_BAF4E798D35F98BFA06BB57227D8CDA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_E6B07A3F14E566E27EB4B57227D8980A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_E6B07A3F14E566E27EB4B57227D8980A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebt" xlink:label="loc_us-gaap_LongTermDebt_52004E2454FE3EB2BBE1B57227D8CA69" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_LongTermDebt_52004E2454FE3EB2BBE1B57227D8CA69" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_16597FE2807B593AD3A2B57227D84A9C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_16597FE2807B593AD3A2B57227D84A9C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance" xlink:label="loc_aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance_0F42FB2339B6338A8F19B57227D8D6A8" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_aal_DebtInstrumentAnnualRepaymentPercentOfPrincipalBalance_0F42FB2339B6338A8F19B57227D8D6A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_94D48212914F19787A5CB57227D8D54C" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_94D48212914F19787A5CB57227D8D54C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_30ADECE63BA84EC9E966B57227D84497" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_30ADECE63BA84EC9E966B57227D84497" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtInstrumentRestrictiveCovenantsMinimumAggregateLiquidityAmount" xlink:label="loc_aal_DebtInstrumentRestrictiveCovenantsMinimumAggregateLiquidityAmount_D99803BCA80345E01167B57227D813DC" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_996D460FDCCC7E5E6ABAB57227D8420F" xlink:to="loc_aal_DebtInstrumentRestrictiveCovenantsMinimumAggregateLiquidityAmount_D99803BCA80345E01167B57227D813DC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_2016663461DD33723903B57227E0D4F3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_3D5F068B705C060EB3E7B57227DFC2F5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2016663461DD33723903B57227E0D4F3" xlink:to="loc_us-gaap_DebtInstrumentTable_3D5F068B705C060EB3E7B57227DFC2F5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_1D2B9E33CCEF4F2F83BCB57227E035A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_3D5F068B705C060EB3E7B57227DFC2F5" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_1D2B9E33CCEF4F2F83BCB57227E035A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9AB092151C545731841EB57227E000EA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1D2B9E33CCEF4F2F83BCB57227E035A3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9AB092151C545731841EB57227E000EA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9AB092151C545731841EB57227E000EA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1D2B9E33CCEF4F2F83BCB57227E035A3" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9AB092151C545731841EB57227E000EA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_AD46E60255A1BAD31C56B57227E0CB2C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_9AB092151C545731841EB57227E000EA" xlink:to="loc_us-gaap_SubsidiariesMember_AD46E60255A1BAD31C56B57227E0CB2C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfAircraftOperatingUnderCapitalLease" xlink:label="loc_aal_NumberOfAircraftOperatingUnderCapitalLease_55D2D76FF561C10669A5B57227E00F79" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2016663461DD33723903B57227E0D4F3" xlink:to="loc_aal_NumberOfAircraftOperatingUnderCapitalLease_55D2D76FF561C10669A5B57227E00F79" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtInstrumentCollateralCoverageTestNumberOfFinancingTransactions" xlink:label="loc_aal_DebtInstrumentCollateralCoverageTestNumberOfFinancingTransactions_2D04D824D35CADCC5C0FB57227E08FDD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_2016663461DD33723903B57227E0D4F3" xlink:to="loc_aal_DebtInstrumentCollateralCoverageTestNumberOfFinancingTransactions_2D04D824D35CADCC5C0FB57227E08FDD" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsOfLongTermDebtDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_4DF01F9BC8C33CC8EE19B57227EB2764" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_4DF01F9BC8C33CC8EE19B57227EB2764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_78E1079521139B8B8CA5B57227EB1FD3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_4DF01F9BC8C33CC8EE19B57227EB2764" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_78E1079521139B8B8CA5B57227EB1FD3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_78E1079521139B8B8CA5B57227EB1FD3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_4DF01F9BC8C33CC8EE19B57227EB2764" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_78E1079521139B8B8CA5B57227EB1FD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_C75E9A40939F6A2834FCB57227EBA55C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_78E1079521139B8B8CA5B57227EB1FD3" xlink:to="loc_us-gaap_SubsidiariesMember_C75E9A40939F6A2834FCB57227EBA55C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_54A41458A467E44B7886B57227EC388E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_54A41458A467E44B7886B57227EC388E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_54A41458A467E44B7886B57227EC388E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_54A41458A467E44B7886B57227EC388E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_9FC76126686E652B3579B57227EC3177" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D" xlink:to="loc_us-gaap_SecuredDebtMember_9FC76126686E652B3579B57227EC3177" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_15D71418A9DB382DE260B57227EC5DE5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_E91FABAF857A55F7870FB57227ECEC8D" xlink:to="loc_us-gaap_UnsecuredDebtMember_15D71418A9DB382DE260B57227EC5DE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_28D3EED3FAC013380840B57227ECA8F6" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:to="loc_us-gaap_DebtInstrumentAxis_28D3EED3FAC013380840B57227ECA8F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_28D3EED3FAC013380840B57227ECA8F6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_28D3EED3FAC013380840B57227ECA8F6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2013Member" xlink:label="loc_aal_CreditFacility2013Member_D4CEC7C0AE03AAD2FA49B57227EC397B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_CreditFacility2013Member_D4CEC7C0AE03AAD2FA49B57227EC397B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2014Member" xlink:label="loc_aal_CreditFacility2014Member_A1386EC9C7DCBDEA4026B57227ECB4B3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_CreditFacility2014Member_A1386EC9C7DCBDEA4026B57227ECB4B3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityApril2016Member" xlink:label="loc_aal_CreditFacilityApril2016Member_326F96EAF9C15082AEE5B57227ECE40F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_CreditFacilityApril2016Member_326F96EAF9C15082AEE5B57227ECE40F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityDecember2016Member" xlink:label="loc_aal_CreditFacilityDecember2016Member_A6DEC2BA6ED0E2D2831BB57227EC8541" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_CreditFacilityDecember2016Member_A6DEC2BA6ED0E2D2831BB57227EC8541" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_ECA4EA0758677CA6CB3EB57227ECDF0D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_ECA4EA0758677CA6CB3EB57227ECDF0D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EquipmentLoansAndOtherNotesPayableMember" xlink:label="loc_aal_EquipmentLoansAndOtherNotesPayableMember_A1654ADED350D36CCF80B57227ED9DF2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_EquipmentLoansAndOtherNotesPayableMember_A1654ADED350D36CCF80B57227ED9DF2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialFacilityRevenueBondsMember" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_8B0EFEA05A3563977E63B57227ED1169" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_8B0EFEA05A3563977E63B57227ED1169" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherSecuredObligationsMember" xlink:label="loc_aal_OtherSecuredObligationsMember_BD7AC8DED77411F8D9F2B57227ED18FB" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_OtherSecuredObligationsMember_BD7AC8DED77411F8D9F2B57227ED18FB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes6.125Duein2018Member" xlink:label="loc_aal_SeniorNotes6.125Duein2018Member_26740EACC91C54FC4143B57227ED5BB6" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_SeniorNotes6.125Duein2018Member_26740EACC91C54FC4143B57227ED5BB6" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes5.50Duein2019Member" xlink:label="loc_aal_SeniorNotes5.50Duein2019Member_63CEA584757679770951B57227EDE17B" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_SeniorNotes5.50Duein2019Member_63CEA584757679770951B57227EDE17B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes4.625Duein2020Member" xlink:label="loc_aal_SeniorNotes4.625Duein2020Member_F7D8650653A20DEACCF3B57227ED7A90" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_6F3E924AA2462A0C8BACB57227ECA932" xlink:to="loc_aal_SeniorNotes4.625Duein2020Member_F7D8650653A20DEACCF3B57227ED7A90" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_FE912B55417CAE9E0DAEB57227ED121E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_173F7D50C0A7175A5282B57227EB0092" xlink:to="loc_us-gaap_RangeAxis_FE912B55417CAE9E0DAEB57227ED121E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_FE912B55417CAE9E0DAEB57227ED121E" xlink:to="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_FE912B55417CAE9E0DAEB57227ED121E" xlink:to="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_EB2A14B8782B8FFCA995B57227ED1717" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2" xlink:to="loc_us-gaap_MinimumMember_EB2A14B8782B8FFCA995B57227ED1717" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_521D4DF963D8106D5729B57227ED7DEC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_9E8DC22A2E37BC4F006BB57227EDA8E2" xlink:to="loc_us-gaap_MaximumMember_521D4DF963D8106D5729B57227ED7DEC" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtAndCapitalLeaseObligationsGross" xlink:label="loc_aal_DebtAndCapitalLeaseObligationsGross_BE8558357374029DA90FB57227ED93C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_aal_DebtAndCapitalLeaseObligationsGross_BE8558357374029DA90FB57227ED93C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet" xlink:label="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_11D857B443C16A46B603B57227EDA6B1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_DebtInstrumentUnamortizedDiscountPremiumAndDebtIssuanceCostsNet_11D857B443C16A46B603B57227EDA6B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_122C93C66E6FDB16C572B57227ED1113" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_122C93C66E6FDB16C572B57227ED1113" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_8DCA5CB4605E2D4EA866B57227ED066A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_8DCA5CB4605E2D4EA866B57227ED066A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtPercentageBearingVariableInterestRate" xlink:label="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_D2B489AEC99D7BD9E7B1B57227ED79E1" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_LongTermDebtPercentageBearingVariableInterestRate_D2B489AEC99D7BD9E7B1B57227ED79E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9BB249FD4D79F2BA3AC0B57227ED4CA8" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_9BB249FD4D79F2BA3AC0B57227ED4CA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_32A87B73B46F5F66C5B1B57227ED370E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_94A3581B8684D0673E6DB57227ED015D" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_32A87B73B46F5F66C5B1B57227ED370E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsOfLongTermDebtEnhancedEquipmentTrustCertificatesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_92BBB553E3D158F0844FB57227CFA4B4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:to="loc_us-gaap_DebtInstrumentTable_92BBB553E3D158F0844FB57227CFA4B4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_595E40AE25098A47259FB57227CFCC3D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_92BBB553E3D158F0844FB57227CFA4B4" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_595E40AE25098A47259FB57227CFCC3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_0739450214D9CC4139B3B57227CFE325_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_595E40AE25098A47259FB57227CFCC3D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_0739450214D9CC4139B3B57227CFE325_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_0739450214D9CC4139B3B57227CFE325" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_595E40AE25098A47259FB57227CFCC3D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_0739450214D9CC4139B3B57227CFE325" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_590592CFBFB940972A2FB57227D07305" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_0739450214D9CC4139B3B57227CFE325" xlink:to="loc_us-gaap_SubsidiariesMember_590592CFBFB940972A2FB57227D07305" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_A1F7743EB93BE17D4A5EB57227D0AD3E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_92BBB553E3D158F0844FB57227CFA4B4" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_A1F7743EB93BE17D4A5EB57227D0AD3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_45CE42F205D7E1299700B57227D07E2A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_A1F7743EB93BE17D4A5EB57227D0AD3E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_45CE42F205D7E1299700B57227D07E2A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_45CE42F205D7E1299700B57227D07E2A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_A1F7743EB93BE17D4A5EB57227D0AD3E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_45CE42F205D7E1299700B57227D07E2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_975B8DA006C1C704D855B57227D0AF72" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_45CE42F205D7E1299700B57227D07E2A" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_975B8DA006C1C704D855B57227D0AF72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_A51EF5432351E88B7A86B57227D086E7" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_92BBB553E3D158F0844FB57227CFA4B4" xlink:to="loc_us-gaap_DebtInstrumentAxis_A51EF5432351E88B7A86B57227D086E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_A51EF5432351E88B7A86B57227D086E7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_A51EF5432351E88B7A86B57227D086E7" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20163EnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20163EnhancedEquipmentTrustCertificatesMember_7B02CEB3345AF540638AB57227D01F82" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1" xlink:to="loc_aal_A20163EnhancedEquipmentTrustCertificatesMember_7B02CEB3345AF540638AB57227D01F82" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember_CF171CDABB42907E6328B57227D04E31" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_A20163EnhancedEquipmentTrustCertificatesMember_7B02CEB3345AF540638AB57227D01F82" xlink:to="loc_aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember_CF171CDABB42907E6328B57227D04E31" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20171EnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20171EnhancedEquipmentTrustCertificatesMember_83421D9F8498C3CB4662B57227D02C8C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1" xlink:to="loc_aal_A20171EnhancedEquipmentTrustCertificatesMember_83421D9F8498C3CB4662B57227D02C8C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20172EnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20172EnhancedEquipmentTrustCertificatesMember_7C2A90EEA64FBBDEC91DB57227D05815" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_B25B1EE94EAF0AB87964B57227D0F8E1" xlink:to="loc_aal_A20172EnhancedEquipmentTrustCertificatesMember_7C2A90EEA64FBBDEC91DB57227D05815" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember_63D6D03BD0CB37946F50B57227D032FE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_A20172EnhancedEquipmentTrustCertificatesMember_7C2A90EEA64FBBDEC91DB57227D05815" xlink:to="loc_aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember_63D6D03BD0CB37946F50B57227D032FE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromIssuanceOfSecuredDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_5D76DE2BACD18F96ADE6B57227D027A8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSecuredDebt_5D76DE2BACD18F96ADE6B57227D027A8" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfAircraftFinancedByDebtIssuance" xlink:label="loc_aal_NumberOfAircraftFinancedByDebtIssuance_CFE74F5FE0196D5D4214B57227D0B7A9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:to="loc_aal_NumberOfAircraftFinancedByDebtIssuance_CFE74F5FE0196D5D4214B57227D0B7A9" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NumberOfPassThroughTrustsIssued" xlink:label="loc_aal_NumberOfPassThroughTrustsIssued_750D9987E322FA834235B57227D003F4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:to="loc_aal_NumberOfPassThroughTrustsIssued_750D9987E322FA834235B57227D003F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_76BC8297251A119ECB8DB57227D1DBEB" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1C39A6F87580786541CBB57227D0C834" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_76BC8297251A119ECB8DB57227D1DBEB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsOfLongTermDebtEquipmentLoansAndOtherNotesPayableIssuedIn2016Detail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_D14D121DD03382B971B6B57227C3EBCD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D14D121DD03382B971B6B57227C3EBCD" xlink:to="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_10B8973F949C6AFCB119B57227C2AC93" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_10B8973F949C6AFCB119B57227C2AC93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A705FC41F2615844312DB57227C22470_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10B8973F949C6AFCB119B57227C2AC93" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A705FC41F2615844312DB57227C22470_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A705FC41F2615844312DB57227C22470" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_10B8973F949C6AFCB119B57227C2AC93" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A705FC41F2615844312DB57227C22470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_0B9CB91DE6E1F536E824B57227C38752" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_A705FC41F2615844312DB57227C22470" xlink:to="loc_us-gaap_SubsidiariesMember_0B9CB91DE6E1F536E824B57227C38752" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_2CD02755B2E814170903B57227C3E138" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_2CD02755B2E814170903B57227C3E138" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6B0AF592966FA0D7F1CCB57227C3F64F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2CD02755B2E814170903B57227C3E138" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6B0AF592966FA0D7F1CCB57227C3F64F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6B0AF592966FA0D7F1CCB57227C3F64F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_2CD02755B2E814170903B57227C3E138" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6B0AF592966FA0D7F1CCB57227C3F64F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_F452798329F0E8EAC97CB57227C3E1F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6B0AF592966FA0D7F1CCB57227C3F64F" xlink:to="loc_us-gaap_SecuredDebtMember_F452798329F0E8EAC97CB57227C3E1F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_77C7BF9ECAD00AEE050EB57227C3D470" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:to="loc_us-gaap_DebtInstrumentAxis_77C7BF9ECAD00AEE050EB57227C3D470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_BCD101D647E2E3AD5AF9B57227C38C49_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_77C7BF9ECAD00AEE050EB57227C3D470" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_BCD101D647E2E3AD5AF9B57227C38C49_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_BCD101D647E2E3AD5AF9B57227C38C49" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_77C7BF9ECAD00AEE050EB57227C3D470" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_BCD101D647E2E3AD5AF9B57227C38C49" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EquipmentLoansAndOtherNotesPayableMember" xlink:label="loc_aal_EquipmentLoansAndOtherNotesPayableMember_D21A297F2BB64F758696B57227C35421" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_BCD101D647E2E3AD5AF9B57227C38C49" xlink:to="loc_aal_EquipmentLoansAndOtherNotesPayableMember_D21A297F2BB64F758696B57227C35421" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateAxis" xlink:label="loc_us-gaap_VariableRateAxis_C6B287F43F8B5304720DB57227C313ED" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B9F73F22C634E32B43C0B57227C2D9C6" xlink:to="loc_us-gaap_VariableRateAxis_C6B287F43F8B5304720DB57227C313ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_E1FCD43292594E5296F0B57227C37F4B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_C6B287F43F8B5304720DB57227C313ED" xlink:to="loc_us-gaap_VariableRateDomain_E1FCD43292594E5296F0B57227C37F4B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_VariableRateDomain" xlink:label="loc_us-gaap_VariableRateDomain_E1FCD43292594E5296F0B57227C37F4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_C6B287F43F8B5304720DB57227C313ED" xlink:to="loc_us-gaap_VariableRateDomain_E1FCD43292594E5296F0B57227C37F4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_6BFB892C9F15C9830F5CB57227C381FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_E1FCD43292594E5296F0B57227C37F4B" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_6BFB892C9F15C9830F5CB57227C381FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSecuredNotesPayable" xlink:label="loc_us-gaap_ProceedsFromSecuredNotesPayable_6F0CBA0A01B9D406879AB57227C331C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D14D121DD03382B971B6B57227C3EBCD" xlink:to="loc_us-gaap_ProceedsFromSecuredNotesPayable_6F0CBA0A01B9D406879AB57227C331C5" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LongTermDebtAverageInterestRate" xlink:label="loc_aal_LongTermDebtAverageInterestRate_7A3F51F1C9CDADD56AE5B57227C36C09" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D14D121DD03382B971B6B57227C3EBCD" xlink:to="loc_aal_LongTermDebtAverageInterestRate_7A3F51F1C9CDADD56AE5B57227C36C09" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsOfLongTermDebtGuaranteesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_207154FCA253C2391D28B57227B7085B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_2F7A1582B4C56C01159FB57227B69D14" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_207154FCA253C2391D28B57227B7085B" xlink:to="loc_us-gaap_DebtInstrumentTable_2F7A1582B4C56C01159FB57227B69D14" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_55F9DC3D2A57E0D5B03CB57227B62B0B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2F7A1582B4C56C01159FB57227B69D14" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_55F9DC3D2A57E0D5B03CB57227B62B0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_EB78E3142AF006B1D87BB57227B604F8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_55F9DC3D2A57E0D5B03CB57227B62B0B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_EB78E3142AF006B1D87BB57227B604F8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_EB78E3142AF006B1D87BB57227B604F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_55F9DC3D2A57E0D5B03CB57227B62B0B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_EB78E3142AF006B1D87BB57227B604F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_88B0CC636DEBF2580AD7B57227B6C322" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_EB78E3142AF006B1D87BB57227B604F8" xlink:to="loc_us-gaap_SubsidiariesMember_88B0CC636DEBF2580AD7B57227B6C322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_D4ED77ACFA91E545DBB6B57227B6B065" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2F7A1582B4C56C01159FB57227B69D14" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_D4ED77ACFA91E545DBB6B57227B6B065" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_D4ED77ACFA91E545DBB6B57227B6B065" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_D4ED77ACFA91E545DBB6B57227B6B065" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_CE9E742B4779DA4F39E1B57227B635A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6" xlink:to="loc_us-gaap_SecuredDebtMember_CE9E742B4779DA4F39E1B57227B635A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_E373EF3549EE9AB680B7B57227B6796B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_2BBBDC1FDB18AF825C36B57227B6B1A6" xlink:to="loc_us-gaap_UnsecuredDebtMember_E373EF3549EE9AB680B7B57227B6796B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_13ACB2CDA5022AFF1712B57227B693C8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_2F7A1582B4C56C01159FB57227B69D14" xlink:to="loc_us-gaap_DebtInstrumentAxis_13ACB2CDA5022AFF1712B57227B693C8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_13ACB2CDA5022AFF1712B57227B693C8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_13ACB2CDA5022AFF1712B57227B693C8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes6.125Duein2018Member" xlink:label="loc_aal_SeniorNotes6.125Duein2018Member_72B0F874D803196EDFBAB57227B76564" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:to="loc_aal_SeniorNotes6.125Duein2018Member_72B0F874D803196EDFBAB57227B76564" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes5.50Duein2019Member" xlink:label="loc_aal_SeniorNotes5.50Duein2019Member_AFDBFACA5155240877F1B57227B71CCB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:to="loc_aal_SeniorNotes5.50Duein2019Member_AFDBFACA5155240877F1B57227B71CCB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes4.625Duein2020Member" xlink:label="loc_aal_SeniorNotes4.625Duein2020Member_A33BE02FA2DB0F78F8DFB57227B7B3DC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:to="loc_aal_SeniorNotes4.625Duein2020Member_A33BE02FA2DB0F78F8DFB57227B7B3DC" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialFacilityRevenueBondsMember" xlink:label="loc_aal_SpecialFacilityRevenueBondsMember_4E04CB3F121621DC34E4B57227B738EA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:to="loc_aal_SpecialFacilityRevenueBondsMember_4E04CB3F121621DC34E4B57227B738EA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilitiesAndCertainEetcFinancingsMember" xlink:label="loc_aal_CreditFacilitiesAndCertainEetcFinancingsMember_A550011D553F5D552B2BB57227B7E6D0" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_8984B880B655F47202B6B57227B670C3" xlink:to="loc_aal_CreditFacilitiesAndCertainEetcFinancingsMember_A550011D553F5D552B2BB57227B7E6D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GuaranteeObligationsMaximumExposure" xlink:label="loc_us-gaap_GuaranteeObligationsMaximumExposure_810273D696DBDB44E251B57227B77C09" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_207154FCA253C2391D28B57227B7085B" xlink:to="loc_us-gaap_GuaranteeObligationsMaximumExposure_810273D696DBDB44E251B57227B77C09" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtComponentsOfLongTermDebtSeniorNotesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_923535BDB93145E5127EB57227BBC637" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_EDCD84A1682BDBD74EC7B57227BA2163" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_923535BDB93145E5127EB57227BBC637" xlink:to="loc_us-gaap_DebtInstrumentTable_EDCD84A1682BDBD74EC7B57227BA2163" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_4BAB8D7804C936CCC4DDB57227BABDFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_EDCD84A1682BDBD74EC7B57227BA2163" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_4BAB8D7804C936CCC4DDB57227BABDFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_D7B69DDF5EF693871BE8B57227BB92F3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4BAB8D7804C936CCC4DDB57227BABDFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_D7B69DDF5EF693871BE8B57227BB92F3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_D7B69DDF5EF693871BE8B57227BB92F3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_4BAB8D7804C936CCC4DDB57227BABDFD" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_D7B69DDF5EF693871BE8B57227BB92F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_23CDA804656AAA922B52B57227BB0AC5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_D7B69DDF5EF693871BE8B57227BB92F3" xlink:to="loc_us-gaap_UnsecuredDebtMember_23CDA804656AAA922B52B57227BB0AC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_8D3C1A30609B8BC7013BB57227BB4C8D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_EDCD84A1682BDBD74EC7B57227BA2163" xlink:to="loc_us-gaap_DebtInstrumentAxis_8D3C1A30609B8BC7013BB57227BB4C8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_76F5ED7EC1A63E5C2E2EB57227BB33F1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_8D3C1A30609B8BC7013BB57227BB4C8D" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_76F5ED7EC1A63E5C2E2EB57227BB33F1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_76F5ED7EC1A63E5C2E2EB57227BB33F1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_8D3C1A30609B8BC7013BB57227BB4C8D" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_76F5ED7EC1A63E5C2E2EB57227BB33F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_2715A4905924A38F43BFB57227BB9ABC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_76F5ED7EC1A63E5C2E2EB57227BB33F1" xlink:to="loc_us-gaap_SeniorNotesMember_2715A4905924A38F43BFB57227BB9ABC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_2B58FFBC870C4FA94BBFB57227BBFBD9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_923535BDB93145E5127EB57227BBC637" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_2B58FFBC870C4FA94BBFB57227BBFBD9" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtDetailsOfEnhancedEquipmentTrustCertificatesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_6B7C80BC35BBCD7B3955B57227CA82AC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_B37134F94ACAC8B48884B57227C9ACB0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6B7C80BC35BBCD7B3955B57227CA82AC" xlink:to="loc_us-gaap_DebtInstrumentTable_B37134F94ACAC8B48884B57227C9ACB0" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_BEA910206C7E717572EDB57227C9FBE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B37134F94ACAC8B48884B57227C9ACB0" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_BEA910206C7E717572EDB57227C9FBE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_532F76C5F576AF9E54D3B57227C93C28_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BEA910206C7E717572EDB57227C9FBE7" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_532F76C5F576AF9E54D3B57227C93C28_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_532F76C5F576AF9E54D3B57227C93C28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BEA910206C7E717572EDB57227C9FBE7" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_532F76C5F576AF9E54D3B57227C93C28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_7ABDF7190111237610C6B57227C9254A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_532F76C5F576AF9E54D3B57227C93C28" xlink:to="loc_us-gaap_SubsidiariesMember_7ABDF7190111237610C6B57227C9254A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_AD746F30ACD4DCF36C10B57227C98A04" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B37134F94ACAC8B48884B57227C9ACB0" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_AD746F30ACD4DCF36C10B57227C98A04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_EE71408D1EBB1456DFBEB57227C948CD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_AD746F30ACD4DCF36C10B57227C98A04" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_EE71408D1EBB1456DFBEB57227C948CD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_EE71408D1EBB1456DFBEB57227C948CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_AD746F30ACD4DCF36C10B57227C98A04" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_EE71408D1EBB1456DFBEB57227C948CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_6D6C7ADB519E7725EBA4B57227C9B1E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_EE71408D1EBB1456DFBEB57227C948CD" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_6D6C7ADB519E7725EBA4B57227C9B1E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_AC3BEB3980E6D85A55E0B57227C93207" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B37134F94ACAC8B48884B57227C9ACB0" xlink:to="loc_us-gaap_DebtInstrumentAxis_AC3BEB3980E6D85A55E0B57227C93207" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_AC3BEB3980E6D85A55E0B57227C93207" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_AC3BEB3980E6D85A55E0B57227C93207" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20163SeriesAAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20163SeriesAAEnhancedEquipmentTrustCertificatesMember_AA325C9367F8ADF3B374B57227C9A53D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20163SeriesAAEnhancedEquipmentTrustCertificatesMember_AA325C9367F8ADF3B374B57227C9A53D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20163SeriesAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20163SeriesAEnhancedEquipmentTrustCertificatesMember_D2EF5362EB6ACACB1D00B57227CAC7C5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20163SeriesAEnhancedEquipmentTrustCertificatesMember_D2EF5362EB6ACACB1D00B57227CAC7C5" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember_374A9C8BDF4E98503882B57227CA182E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20163SeriesBEnhancedEquipmentTrustCertificatesMember_374A9C8BDF4E98503882B57227CA182E" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20171SeriesAAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20171SeriesAAEnhancedEquipmentTrustCertificatesMember_9D2DBD8F885645E17886B57227CA0A9B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20171SeriesAAEnhancedEquipmentTrustCertificatesMember_9D2DBD8F885645E17886B57227CA0A9B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20171SeriesAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20171SeriesAEnhancedEquipmentTrustCertificatesMember_036F13C197DF8D4E12C3B57227CAE901" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20171SeriesAEnhancedEquipmentTrustCertificatesMember_036F13C197DF8D4E12C3B57227CAE901" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20171SeriesBEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20171SeriesBEnhancedEquipmentTrustCertificatesMember_58ED0E58979FC42D0ED3B57227CA3186" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20171SeriesBEnhancedEquipmentTrustCertificatesMember_58ED0E58979FC42D0ED3B57227CA3186" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20172SeriesAAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20172SeriesAAEnhancedEquipmentTrustCertificatesMember_D361B613195F2494E79AB57227CA53FF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20172SeriesAAEnhancedEquipmentTrustCertificatesMember_D361B613195F2494E79AB57227CA53FF" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20172SeriesAEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20172SeriesAEnhancedEquipmentTrustCertificatesMember_F1AFA47526626EE20844B57227CA3C06" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20172SeriesAEnhancedEquipmentTrustCertificatesMember_F1AFA47526626EE20844B57227CA3C06" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember" xlink:label="loc_aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember_733BDBE3F473CD58FEF7B57227CA8705" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_F6D60499F218BA6EAFC4B57227C9196D" xlink:to="loc_aal_A20172SeriesBEnhancedEquipmentTrustCertificatesMember_733BDBE3F473CD58FEF7B57227CA8705" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_811099E2894D36748088B57227CA1C51" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6B7C80BC35BBCD7B3955B57227CA82AC" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_811099E2894D36748088B57227CA1C51" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount" xlink:label="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_CD94A2A95E5D3EE56B73B57227CA5B7F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6B7C80BC35BBCD7B3955B57227CA82AC" xlink:to="loc_us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount_CD94A2A95E5D3EE56B73B57227CA5B7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_E12D9BD0E7A980B4868BB57227CA4B18" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_6B7C80BC35BBCD7B3955B57227CA82AC" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_E12D9BD0E7A980B4868BB57227CA4B18" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtDetailsOfSeniorNotesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_D93E499BB5AFC791CC56B57227BF569C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_9A3A42A682B16E496F7AB57227BEA79F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D93E499BB5AFC791CC56B57227BF569C" xlink:to="loc_us-gaap_DebtInstrumentTable_9A3A42A682B16E496F7AB57227BEA79F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_8B44E6325661C778330CB57227BEA1D7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9A3A42A682B16E496F7AB57227BEA79F" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_8B44E6325661C778330CB57227BEA1D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_827E617D632E456834CDB57227BE8AF0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8B44E6325661C778330CB57227BEA1D7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_827E617D632E456834CDB57227BE8AF0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_827E617D632E456834CDB57227BE8AF0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_8B44E6325661C778330CB57227BEA1D7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_827E617D632E456834CDB57227BE8AF0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_8BB8F0EBCD84D101532FB57227BE616B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_827E617D632E456834CDB57227BE8AF0" xlink:to="loc_us-gaap_UnsecuredDebtMember_8BB8F0EBCD84D101532FB57227BE616B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_D58DD4605C70C6C918B0B57227BE721C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9A3A42A682B16E496F7AB57227BEA79F" xlink:to="loc_us-gaap_DebtInstrumentAxis_D58DD4605C70C6C918B0B57227BE721C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_D58DD4605C70C6C918B0B57227BE721C" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_D58DD4605C70C6C918B0B57227BE721C" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes6.125Duein2018Member" xlink:label="loc_aal_SeniorNotes6.125Duein2018Member_925A20C44E477AD2CB34B57227BEE098" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3" xlink:to="loc_aal_SeniorNotes6.125Duein2018Member_925A20C44E477AD2CB34B57227BEE098" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes5.50Duein2019Member" xlink:label="loc_aal_SeniorNotes5.50Duein2019Member_EB357700938A4D6BD01AB57227BF1285" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3" xlink:to="loc_aal_SeniorNotes5.50Duein2019Member_EB357700938A4D6BD01AB57227BF1285" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SeniorNotes4.625Duein2020Member" xlink:label="loc_aal_SeniorNotes4.625Duein2020Member_64DBBCED3A5141818522B57227BFED18" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_137D3F0A12437CBBAAEFB57227BE68A3" xlink:to="loc_aal_SeniorNotes4.625Duein2020Member_64DBBCED3A5141818522B57227BFED18" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_619E355C42D8E86EE832B57227BF0309" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D93E499BB5AFC791CC56B57227BF569C" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_619E355C42D8E86EE832B57227BF0309" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1F94070E3C3FE76C8FCBB57227BFA717" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_D93E499BB5AFC791CC56B57227BF569C" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_1F94070E3C3FE76C8FCBB57227BFA717" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtScheduleOfCollateralCoverageTestsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_EB950EBDFA0EF814325AB57227B22A8F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_090C126FAC09CECE2519B57227B1A4C1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EB950EBDFA0EF814325AB57227B22A8F" xlink:to="loc_us-gaap_DebtInstrumentTable_090C126FAC09CECE2519B57227B1A4C1" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_11894C5BA24EAA53B4EAB57227B17B98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_090C126FAC09CECE2519B57227B1A4C1" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_11894C5BA24EAA53B4EAB57227B17B98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B51A1575EAF801AAB5CEB57227B11781_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_11894C5BA24EAA53B4EAB57227B17B98" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B51A1575EAF801AAB5CEB57227B11781_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B51A1575EAF801AAB5CEB57227B11781" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_11894C5BA24EAA53B4EAB57227B17B98" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B51A1575EAF801AAB5CEB57227B11781" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_2C1D20B4146A5EFB234CB57227B1A367" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B51A1575EAF801AAB5CEB57227B11781" xlink:to="loc_us-gaap_SubsidiariesMember_2C1D20B4146A5EFB234CB57227B1A367" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_6E41A1D8DAA5F4652ECCB57227B1C149" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_090C126FAC09CECE2519B57227B1A4C1" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_6E41A1D8DAA5F4652ECCB57227B1C149" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_92466C3738A50EC67857B57227B185C2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6E41A1D8DAA5F4652ECCB57227B1C149" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_92466C3738A50EC67857B57227B185C2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_92466C3738A50EC67857B57227B185C2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_6E41A1D8DAA5F4652ECCB57227B1C149" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_92466C3738A50EC67857B57227B185C2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_7BE09975510FCCDAAF12B57227B234C7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_92466C3738A50EC67857B57227B185C2" xlink:to="loc_us-gaap_SecuredDebtMember_7BE09975510FCCDAAF12B57227B234C7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_421ED5C722CD8DA94B0EB57227B269A3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_090C126FAC09CECE2519B57227B1A4C1" xlink:to="loc_us-gaap_DebtInstrumentAxis_421ED5C722CD8DA94B0EB57227B269A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_421ED5C722CD8DA94B0EB57227B269A3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_421ED5C722CD8DA94B0EB57227B269A3" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2013Member" xlink:label="loc_aal_CreditFacility2013Member_3612E6BE2984D72A765DB57227B237AE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:to="loc_aal_CreditFacility2013Member_3612E6BE2984D72A765DB57227B237AE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2014Member" xlink:label="loc_aal_CreditFacility2014Member_E04E37D303350B34B7FFB57227B2BAB8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:to="loc_aal_CreditFacility2014Member_E04E37D303350B34B7FFB57227B2BAB8" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityApril2016Member" xlink:label="loc_aal_CreditFacilityApril2016Member_19ECA903FE725180C205B57227B2D709" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:to="loc_aal_CreditFacilityApril2016Member_19ECA903FE725180C205B57227B2D709" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityDecember2016Member" xlink:label="loc_aal_CreditFacilityDecember2016Member_31A37B1856D955DB22ECB57227B26487" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_D8F6045FD78EE4EE1250B57227B26F36" xlink:to="loc_aal_CreditFacilityDecember2016Member_31A37B1856D955DB22ECB57227B26487" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier" xlink:label="loc_aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier_2ED2DDAB0DF26CDC538CB57227B283D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EB950EBDFA0EF814325AB57227B22A8F" xlink:to="loc_aal_DebtInstrumentCollateralCovenantLoanToValueRatioMultiplier_2ED2DDAB0DF26CDC538CB57227B283D5" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio" xlink:label="loc_aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio_EB3CBBE1318F7D60A49DB57227B2588F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EB950EBDFA0EF814325AB57227B22A8F" xlink:to="loc_aal_DebtInstrumentCollateralCovenantMaximumLoanToValueRatio_EB3CBBE1318F7D60A49DB57227B2588F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LtvAsOfMeasurementDate" xlink:label="loc_aal_LtvAsOfMeasurementDate_9F494BEDD0FB2D1ED1F1B57227B2C757" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_EB950EBDFA0EF814325AB57227B22A8F" xlink:to="loc_aal_LtvAsOfMeasurementDate_9F494BEDD0FB2D1ED1F1B57227B2C757" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtScheduleOfMaturitiesOfLongTermDebtAndCapitalLeasesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_88CC52C99A2D44EA8135B57227DC0B70" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_DebtInstrumentTable_88CC52C99A2D44EA8135B57227DC0B70" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_626250D7F6ADE57905D1B57227DC7F1B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_88CC52C99A2D44EA8135B57227DC0B70" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_626250D7F6ADE57905D1B57227DC7F1B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1258EE8C6A9C86737E79B57227DDD39F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_626250D7F6ADE57905D1B57227DC7F1B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1258EE8C6A9C86737E79B57227DDD39F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1258EE8C6A9C86737E79B57227DDD39F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_626250D7F6ADE57905D1B57227DC7F1B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1258EE8C6A9C86737E79B57227DDD39F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_3D7B1043FB23C67F0B39B57227DDD79E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_1258EE8C6A9C86737E79B57227DDD39F" xlink:to="loc_us-gaap_SubsidiariesMember_3D7B1043FB23C67F0B39B57227DDD79E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths_054080571E4CFF18BE24B57227DD5BF7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsRepaymentsOfPrincipalInNextTwelveMonths_054080571E4CFF18BE24B57227DD5BF7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo_47047E93D58A14DB27EFB57227DD498E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearTwo_47047E93D58A14DB27EFB57227DD498E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree_66689DD5C74EFB6814D7B57227DDFC4F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearThree_66689DD5C74EFB6814D7B57227DDFC4F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour_53302AF0A932A08FB4CFB57227DDFF38" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFour_53302AF0A932A08FB4CFB57227DDFF38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive_3F60D12A179B9D340B20B57227DD8162" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalInYearFive_3F60D12A179B9D340B20B57227DD8162" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalAfterYearFive" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalAfterYearFive_279719F3F8C9FE381475B57227DD57A9" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsMaturitiesRepaymentsOfPrincipalAfterYearFive_279719F3F8C9FE381475B57227DD57A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtAndCapitalLeaseObligations" xlink:label="loc_us-gaap_DebtAndCapitalLeaseObligations_47D26FD7C4EB2F3EA6E1B57227DD7964" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_8B69340B21B07CCCC5CDB57227DDAB4A" xlink:to="loc_us-gaap_DebtAndCapitalLeaseObligations_47D26FD7C4EB2F3EA6E1B57227DD7964" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtSummaryOfAvailabilityUnderRevolvingCreditFacilitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityLineItems" xlink:label="loc_us-gaap_LineOfCreditFacilityLineItems_054F7E86EF7AE647D8CCB57227E5F7B3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_054F7E86EF7AE647D8CCB57227E5F7B3" xlink:to="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_FEFD3CE7924B5850CD2EB57227E4E695" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_FEFD3CE7924B5850CD2EB57227E4E695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_58E5AC23D7555C456C30B57227E4A4CF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_FEFD3CE7924B5850CD2EB57227E4E695" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_58E5AC23D7555C456C30B57227E4A4CF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_58E5AC23D7555C456C30B57227E4A4CF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_FEFD3CE7924B5850CD2EB57227E4E695" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_58E5AC23D7555C456C30B57227E4A4CF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_C4DB5F570F660220809CB57227E432DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_58E5AC23D7555C456C30B57227E4A4CF" xlink:to="loc_us-gaap_SubsidiariesMember_C4DB5F570F660220809CB57227E432DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_0EEBA1D9DC7BC17F9527B57227E48C8E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_0EEBA1D9DC7BC17F9527B57227E48C8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5766E22D17696C4CD177B57227E4F92C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0EEBA1D9DC7BC17F9527B57227E48C8E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5766E22D17696C4CD177B57227E4F92C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_5766E22D17696C4CD177B57227E4F92C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0EEBA1D9DC7BC17F9527B57227E48C8E" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_5766E22D17696C4CD177B57227E4F92C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_8D5C276B5095C304120CB57227E4A0A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_5766E22D17696C4CD177B57227E4F92C" xlink:to="loc_us-gaap_SecuredDebtMember_8D5C276B5095C304120CB57227E4A0A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityAxis" xlink:label="loc_us-gaap_CreditFacilityAxis_B22E050397EB939B2A5CB57227E45436" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:to="loc_us-gaap_CreditFacilityAxis_B22E050397EB939B2A5CB57227E45436" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_187CDC828EF263B99C92B57227E48193_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_B22E050397EB939B2A5CB57227E45436" xlink:to="loc_us-gaap_CreditFacilityDomain_187CDC828EF263B99C92B57227E48193_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CreditFacilityDomain" xlink:label="loc_us-gaap_CreditFacilityDomain_187CDC828EF263B99C92B57227E48193" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_B22E050397EB939B2A5CB57227E45436" xlink:to="loc_us-gaap_CreditFacilityDomain_187CDC828EF263B99C92B57227E48193" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_4B07549096324FADF095B57227E481B5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_187CDC828EF263B99C92B57227E48193" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_4B07549096324FADF095B57227E481B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_520528A7E97657F1DFF1B57227E40511" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LineOfCreditFacilityTable_13377CD18021F8C93A77B57227E4EF0A" xlink:to="loc_us-gaap_DebtInstrumentAxis_520528A7E97657F1DFF1B57227E40511" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_520528A7E97657F1DFF1B57227E40511" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_520528A7E97657F1DFF1B57227E40511" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2013Member" xlink:label="loc_aal_CreditFacility2013Member_F5A9ABB7EF467D5FC39EB57227E44FAA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2" xlink:to="loc_aal_CreditFacility2013Member_F5A9ABB7EF467D5FC39EB57227E44FAA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacility2014Member" xlink:label="loc_aal_CreditFacility2014Member_E5FD687350C727EC3B5FB57227E42983" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2" xlink:to="loc_aal_CreditFacility2014Member_E5FD687350C727EC3B5FB57227E42983" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CreditFacilityApril2016Member" xlink:label="loc_aal_CreditFacilityApril2016Member_9190B0D7EBC15CD146C3B57227E4A9FD" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_40511CD59130D393DEA0B57227E484E2" xlink:to="loc_aal_CreditFacilityApril2016Member_9190B0D7EBC15CD146C3B57227E4A9FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_63B8A090A9C20CC3A985B57227E58CCC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LineOfCreditFacilityLineItems_054F7E86EF7AE647D8CCB57227E5F7B3" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_63B8A090A9C20CC3A985B57227E58CCC" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DebtTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_B2C388FB5AF4A5A1860DB57227F12035" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:to="loc_us-gaap_DebtInstrumentTable_B2C388FB5AF4A5A1860DB57227F12035" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_3DB36B0304F975EB64D8B57227F27BC0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B2C388FB5AF4A5A1860DB57227F12035" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_3DB36B0304F975EB64D8B57227F27BC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_8A4377C13E34F484D41EB57227F2C3C3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3DB36B0304F975EB64D8B57227F27BC0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_8A4377C13E34F484D41EB57227F2C3C3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_8A4377C13E34F484D41EB57227F2C3C3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3DB36B0304F975EB64D8B57227F27BC0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_8A4377C13E34F484D41EB57227F2C3C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_7FF115778CF7A3948BC9B57227F26ADD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_8A4377C13E34F484D41EB57227F2C3C3" xlink:to="loc_us-gaap_SubsidiariesMember_7FF115778CF7A3948BC9B57227F26ADD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_5F516D40CB95545FC51DB57227F25564" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B2C388FB5AF4A5A1860DB57227F12035" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_5F516D40CB95545FC51DB57227F25564" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5F516D40CB95545FC51DB57227F25564" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_5F516D40CB95545FC51DB57227F25564" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SecuredDebtMember" xlink:label="loc_us-gaap_SecuredDebtMember_7049185E1AFDC114B275B57227F21BCE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C" xlink:to="loc_us-gaap_SecuredDebtMember_7049185E1AFDC114B275B57227F21BCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_UnsecuredDebtMember" xlink:label="loc_us-gaap_UnsecuredDebtMember_5001ACE689B324B9D5A0B57227F2809D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_A7A2D57BC847C58495FCB57227F2EB2C" xlink:to="loc_us-gaap_UnsecuredDebtMember_5001ACE689B324B9D5A0B57227F2809D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentAxis" xlink:label="loc_us-gaap_DebtInstrumentAxis_F929CA171AC382FFBD4DB57227F20129" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_B2C388FB5AF4A5A1860DB57227F12035" xlink:to="loc_us-gaap_DebtInstrumentAxis_F929CA171AC382FFBD4DB57227F20129" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_F929CA171AC382FFBD4DB57227F20129" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_F929CA171AC382FFBD4DB57227F20129" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SeniorNotesMember" xlink:label="loc_us-gaap_SeniorNotesMember_DD53F3A98F42956002D0B57227F2296B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4" xlink:to="loc_us-gaap_SeniorNotesMember_DD53F3A98F42956002D0B57227F2296B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EnhancedEquipmentTrustCertificateMember" xlink:label="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_5A93BD741CD3643CA25BB57227F25E82" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_957171FA24BF595BB8DAB57227F226A4" xlink:to="loc_us-gaap_EnhancedEquipmentTrustCertificateMember_5A93BD741CD3643CA25BB57227F25E82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDebtTableTextBlock_04F95A74CE0C5592EC5CB57227F280AB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:to="loc_us-gaap_ScheduleOfDebtTableTextBlock_04F95A74CE0C5592EC5CB57227F280AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock" xlink:label="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_4FDFF37DAF0991DB323EB57227F232FA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:to="loc_us-gaap_ScheduleOfLineOfCreditFacilitiesTextBlock_4FDFF37DAF0991DB323EB57227F232FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_9A721337B9F6C9A92CC2B57227F25F10" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:to="loc_us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_9A721337B9F6C9A92CC2B57227F25F10" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ScheduleOfCollateralCoverageTestsTableTextBlock" xlink:label="loc_aal_ScheduleOfCollateralCoverageTestsTableTextBlock_F2E125CC73809A07F7D1B57227F255C3" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_1CFFABC55A2F3293A7C4B57227F2B7DC" xlink:to="loc_aal_ScheduleOfCollateralCoverageTestsTableTextBlock_F2E125CC73809A07F7D1B57227F255C3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationLineItems" xlink:label="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentInformationTable" xlink:label="loc_dei_DocumentInformationTable_8425A63A1BE5302E57BEB572298750A6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_DocumentInformationTable_8425A63A1BE5302E57BEB572298750A6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_836C9569B36CD5CF35AEB57229887EFD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_8425A63A1BE5302E57BEB572298750A6" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_836C9569B36CD5CF35AEB57229887EFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_17512306F02DBAFE98CFB5722988BE85_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_836C9569B36CD5CF35AEB57229887EFD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_17512306F02DBAFE98CFB5722988BE85_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_17512306F02DBAFE98CFB5722988BE85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_836C9569B36CD5CF35AEB57229887EFD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_17512306F02DBAFE98CFB5722988BE85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_1E2B42F72C8D42FA8DF5B5722988F1F0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_17512306F02DBAFE98CFB5722988BE85" xlink:to="loc_us-gaap_SubsidiariesMember_1E2B42F72C8D42FA8DF5B5722988F1F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_69BCF461842A9F36FB7FB5722988D9B7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_DocumentType_69BCF461842A9F36FB7FB5722988D9B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_D10FFA76400737FBEA55B5722988C0E4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_AmendmentFlag_D10FFA76400737FBEA55B5722988C0E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_C82B674BAECA8012BB52B57229887E6A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_DocumentPeriodEndDate_C82B674BAECA8012BB52B57229887E6A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_FCB05284465929FABAF7B57229888979" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_DocumentFiscalYearFocus_FCB05284465929FABAF7B57229888979" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_7F8A4097A36E7F49220FB57229882991" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_DocumentFiscalPeriodFocus_7F8A4097A36E7F49220FB57229882991" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_7D39002EB4C7AB28438BB57229887E19" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_TradingSymbol_7D39002EB4C7AB28438BB57229887E19" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_AD1CF46D391E1CD1FADCB5722988C701" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityRegistrantName_AD1CF46D391E1CD1FADCB5722988C701" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_33EB5B4DD567A978B3B3B5722988359A" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityCentralIndexKey_33EB5B4DD567A978B3B3B5722988359A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_DF75BFE26580975FFA78B57229893C9B" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_CurrentFiscalYearEndDate_DF75BFE26580975FFA78B57229893C9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_9F359D8E6A770C86F4E3B572298948B6" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_9F359D8E6A770C86F4E3B572298948B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_C2B322CD77328C93EC9AB57229891E6B" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityCurrentReportingStatus_C2B322CD77328C93EC9AB57229891E6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityVoluntaryFilers" xlink:label="loc_dei_EntityVoluntaryFilers_810EF1247FFCFC30BFBDB57229893A68" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityVoluntaryFilers_810EF1247FFCFC30BFBDB57229893A68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_3EB05E143986B8E4FFD8B57229891536" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityFilerCategory_3EB05E143986B8E4FFD8B57229891536" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_B72D9A574153F4C9C0AAB572298910E5" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_B72D9A574153F4C9C0AAB572298910E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd#dei_EntityPublicFloat" xlink:label="loc_dei_EntityPublicFloat_FB4C259DA11ABCB99F3CB57229891C65" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_6B0FB54FB1615262B7BBB57229884782" xlink:to="loc_dei_EntityPublicFloat_FB4C259DA11ABCB99F3CB57229891C65" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EarningsLossPerShareComputationOfBasicAndDilutedEarningsPerCommonShareDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/EarningsPerCommonShare" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/EarningsPerCommonShareTables" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlans" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_98516028F485F9958B93B57227730F92" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_EB701C4CEAB275EA7640B57227734C25" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_98516028F485F9958B93B57227730F92" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_EB701C4CEAB275EA7640B57227734C25" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_665709E698C23709EBE8B5722773DFA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_EB701C4CEAB275EA7640B57227734C25" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_665709E698C23709EBE8B5722773DFA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B7311468F5B6C5265EBAB57227730F65_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_665709E698C23709EBE8B5722773DFA0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B7311468F5B6C5265EBAB57227730F65_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B7311468F5B6C5265EBAB57227730F65" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_665709E698C23709EBE8B5722773DFA0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B7311468F5B6C5265EBAB57227730F65" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_525278684FF55A4C961EB57227734E92" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B7311468F5B6C5265EBAB57227730F65" xlink:to="loc_us-gaap_SubsidiariesMember_525278684FF55A4C961EB57227734E92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_D448C48EDB2113028526B572277331E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_98516028F485F9958B93B57227730F92" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock_D448C48EDB2113028526B572277331E6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_AE87ADF18B637255BA1BB57227691A32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_AE87ADF18B637255BA1BB57227691A32" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_9F353670343DA92FC0F2B57227698263" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_AE87ADF18B637255BA1BB57227691A32" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_9F353670343DA92FC0F2B57227698263" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_29C208A2B3B78547F3C1B572276982F8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9F353670343DA92FC0F2B57227698263" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_29C208A2B3B78547F3C1B572276982F8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_29C208A2B3B78547F3C1B572276982F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9F353670343DA92FC0F2B57227698263" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_29C208A2B3B78547F3C1B572276982F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_51698F181D8A545C2061B57227695659" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_29C208A2B3B78547F3C1B572276982F8" xlink:to="loc_us-gaap_SubsidiariesMember_51698F181D8A545C2061B57227695659" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_651EF6728239711D9988B5722769347D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_AE87ADF18B637255BA1BB57227691A32" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_651EF6728239711D9988B5722769347D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_651EF6728239711D9988B5722769347D" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_651EF6728239711D9988B5722769347D" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_6A7564A85D2BAFE99D3AB5722769C647" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_6A7564A85D2BAFE99D3AB5722769C647" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_12E752C7CCB70646BF22B572276A30B2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_6E630823005F28745D48B572276900E4" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_12E752C7CCB70646BF22B572276A30B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_F77EFD8F8354C0D22637B572276A8DFE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_F77EFD8F8354C0D22637B572276A8DFE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanAmortizationPeriodOfGainsLossesRelatedToPlanAmendment" xlink:label="loc_aal_DefinedBenefitPlanAmortizationPeriodOfGainsLossesRelatedToPlanAmendment_036E96EF2CBCD2278BF3B572276AE739" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_aal_DefinedBenefitPlanAmortizationPeriodOfGainsLossesRelatedToPlanAmendment_036E96EF2CBCD2278BF3B572276AE739" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesRelatedToPlanAmendmentBeforeTax" xlink:label="loc_aal_PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesRelatedToPlanAmendmentBeforeTax_124E01C80CFD7C5ED3D6B572276A91C5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_aal_PensionAndOtherPostretirementBenefitPlansAccumulatedOtherComprehensiveIncomeLossNetGainsLossesRelatedToPlanAmendmentBeforeTax_124E01C80CFD7C5ED3D6B572276A91C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear_50D69E92ACBCEFCCA6E7B572276A3C15" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedAmortizationNextFiscalYear_50D69E92ACBCEFCCA6E7B572276A3C15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_5D53371923B1D2173D10B572276A8C38" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_5D53371923B1D2173D10B572276A8C38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_9F13BA271CB28262B674B572276A22FE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear_9F13BA271CB28262B674B572276A22FE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlansEstimatedSupplementalFutureEmployerContributionsInNextFiscalYear" xlink:label="loc_aal_DefinedBenefitPlansEstimatedSupplementalFutureEmployerContributionsInNextFiscalYear_05390AFDEBE06636DD9DB572276AB381" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_14269D0244559333903FB572276AE9F4" xlink:to="loc_aal_DefinedBenefitPlansEstimatedSupplementalFutureEmployerContributionsInNextFiscalYear_05390AFDEBE06636DD9DB572276AB381" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansChangesInFairValueMeasurementsOfLevel3InvestmentsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A2AAFE024499B7C39D9DB5722719D8FA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A2AAFE024499B7C39D9DB5722719D8FA" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_531D9AEA0F83721ACA7EB5722718AFE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_531D9AEA0F83721ACA7EB5722718AFE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_88931BF467CDFE2F190FB5722718B848_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_531D9AEA0F83721ACA7EB5722718AFE4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_88931BF467CDFE2F190FB5722718B848_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_88931BF467CDFE2F190FB5722718B848" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_531D9AEA0F83721ACA7EB5722718AFE4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_88931BF467CDFE2F190FB5722718B848" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_3B26F013C47E9203DED5B57227184E60" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_88931BF467CDFE2F190FB5722718B848" xlink:to="loc_us-gaap_SubsidiariesMember_3B26F013C47E9203DED5B57227184E60" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_5967CAECE4FBA1DA97E7B57227180DBE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_5967CAECE4FBA1DA97E7B57227180DBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1F6B8F71A8ED9B35A034B57227184748_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_5967CAECE4FBA1DA97E7B57227180DBE" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1F6B8F71A8ED9B35A034B57227184748_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1F6B8F71A8ED9B35A034B57227184748" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_5967CAECE4FBA1DA97E7B57227180DBE" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1F6B8F71A8ED9B35A034B57227184748" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_625CE3979E0EBB74EB70B5722718EBED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1F6B8F71A8ED9B35A034B57227184748" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_625CE3979E0EBB74EB70B5722718EBED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2DE77D9909CBB00891F1B5722718412E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2DE77D9909CBB00891F1B5722718412E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_C35D77802A26DF4F032DB57227188B2B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2DE77D9909CBB00891F1B5722718412E" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_C35D77802A26DF4F032DB57227188B2B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_C35D77802A26DF4F032DB57227188B2B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2DE77D9909CBB00891F1B5722718412E" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_C35D77802A26DF4F032DB57227188B2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_1B02F346B6E3D86BC031B5722718E4DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_C35D77802A26DF4F032DB57227188B2B" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_1B02F346B6E3D86BC031B5722718E4DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_FA75599621459097D5CEB572271872DF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_9FA223A374348A4F2EB0B57227186FEB" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_FA75599621459097D5CEB572271872DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_FA75599621459097D5CEB572271872DF" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_FA75599621459097D5CEB572271872DF" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrivateEquityFundsMember" xlink:label="loc_us-gaap_PrivateEquityFundsMember_2109953C00CF33E6267CB572271999EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D" xlink:to="loc_us-gaap_PrivateEquityFundsMember_2109953C00CF33E6267CB572271999EB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InsuranceGroupAnnuityContractsMember" xlink:label="loc_aal_InsuranceGroupAnnuityContractsMember_AEC07F766FD16A83690EB5722719ED82" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_3120CFE9E6ABF9E829ADB5722718C73D" xlink:to="loc_aal_InsuranceGroupAnnuityContractsMember_AEC07F766FD16A83690EB5722719ED82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A2AAFE024499B7C39D9DB5722719D8FA" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E886284FFF6B4B1980E8B5722719DC27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_E886284FFF6B4B1980E8B5722719DC27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_76A3350ACD5D3F2B1471B57227194EE1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsStillHeld_76A3350ACD5D3F2B1471B57227194EE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_57AA4B605BE363422EC1B572271949C2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssetsSoldDuringPeriod_57AA4B605BE363422EC1B572271949C2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationPurchases" xlink:label="loc_aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationPurchases_6BCF030A08B671B6FDB8B572271917F4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationPurchases_6BCF030A08B671B6FDB8B572271917F4" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationSales" xlink:label="loc_aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationSales_B37E06C205D11AA3AEF0B5722719E54E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_aal_DefinedBenefitPlanPlanAssetsLevel3ReconciliationSales_B37E06C205D11AA3AEF0B5722719E54E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels" xlink:label="loc_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_DF9CD2AB02779D5B28ACB57227191E3A" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsLevel3ReconciliationRollForward_E3E30B3E320304764B9BB5722719D456" xlink:to="loc_us-gaap_DefinedBenefitPlanTransfersBetweenMeasurementLevels_DF9CD2AB02779D5B28ACB57227191E3A" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansComponentsOfNetPeriodicBenefitCostIncomeDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_896409C4A0D1A13808F0B572274BD8E7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_91D18B79DC86733E2EA9B572274B0439" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_896409C4A0D1A13808F0B572274BD8E7" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_91D18B79DC86733E2EA9B572274B0439" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E5A1432C15C60C32E343B572274B3C64" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_91D18B79DC86733E2EA9B572274B0439" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E5A1432C15C60C32E343B572274B3C64" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F8FE4AAADA4161D7FF8FB572274BD208_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5A1432C15C60C32E343B572274B3C64" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F8FE4AAADA4161D7FF8FB572274BD208_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F8FE4AAADA4161D7FF8FB572274BD208" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5A1432C15C60C32E343B572274B3C64" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F8FE4AAADA4161D7FF8FB572274BD208" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_D1EF486012B9FA4F71F5B572274B5C8A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F8FE4AAADA4161D7FF8FB572274BD208" xlink:to="loc_us-gaap_SubsidiariesMember_D1EF486012B9FA4F71F5B572274B5C8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_ECAEF6F993CF02725D7EB572274B1371" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_91D18B79DC86733E2EA9B572274B0439" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_ECAEF6F993CF02725D7EB572274B1371" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_ECAEF6F993CF02725D7EB572274B1371" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_ECAEF6F993CF02725D7EB572274B1371" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_623994B96C9110FEBA24B572274B45CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_623994B96C9110FEBA24B572274B45CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_16F820924D9AB6978624B572274B651E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_BA605DEE73261D4E8565B572274B28D3" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_16F820924D9AB6978624B572274B651E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_896409C4A0D1A13808F0B572274BD8E7" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_F62F818EB0B06EDC3ABBB572274B24C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_F62F818EB0B06EDC3ABBB572274B24C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_EEAE6B0E396025CDF59FB572274C85F2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_EEAE6B0E396025CDF59FB572274C85F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_A9FD31C804140DB1FBECB572274C45F4" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_A9FD31C804140DB1FBECB572274C45F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_6CD384F9A8EC560434FAB572274C1FDC" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_6CD384F9A8EC560434FAB572274C1FDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_A95BE8DE1C37BF3C25E0B572274C3FCE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_A95BE8DE1C37BF3C25E0B572274C3FCE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_69D1A26A235BCB7E748BB572274C5469" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_69D1A26A235BCB7E748BB572274C5469" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_259A424A7E7D8B20243DB572274CD94E" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_259A424A7E7D8B20243DB572274CD94E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedContributionPlanCostRecognized" xlink:label="loc_us-gaap_DefinedContributionPlanCostRecognized_6202F6970AD86DC2E695B572274CD43E" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_DefinedContributionPlanCostRecognized_6202F6970AD86DC2E695B572274CD43E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementBenefitExpense" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_392B1C5AC3943C59ECC3B572274C1F1D" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_781D44A4873A168910D0B572274BCA03" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitExpense_392B1C5AC3943C59ECC3B572274C1F1D" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansEmployeeBenefitPlansProfitSharingProgramDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_AFF0E00BB2C8244C7AD1B572270B81D5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable" xlink:label="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_F90979FC50B1BD288B41B572270A1B86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_AFF0E00BB2C8244C7AD1B572270B81D5" xlink:to="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_F90979FC50B1BD288B41B572270A1B86" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_BAF975AEC3AC124322DBB572270A6EE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_F90979FC50B1BD288B41B572270A1B86" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_BAF975AEC3AC124322DBB572270A6EE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6B601578C1451498ED7DB572270AD2F4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BAF975AEC3AC124322DBB572270A6EE4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6B601578C1451498ED7DB572270AD2F4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6B601578C1451498ED7DB572270AD2F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BAF975AEC3AC124322DBB572270A6EE4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6B601578C1451498ED7DB572270AD2F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_04B4C7B6CA66AC21D26BB572270BAADB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_6B601578C1451498ED7DB572270AD2F4" xlink:to="loc_us-gaap_SubsidiariesMember_04B4C7B6CA66AC21D26BB572270BAADB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis" xlink:label="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_52922FCA21D428A77962B572270B1E8D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTitleOfIndividualAndByTypeOfDeferredCompensationTable_F90979FC50B1BD288B41B572270A1B86" xlink:to="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_52922FCA21D428A77962B572270B1E8D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_CDAA115E4D1C5025D7D1B572270B0BA7_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_52922FCA21D428A77962B572270B1E8D" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_CDAA115E4D1C5025D7D1B572270B0BA7_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain" xlink:label="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_CDAA115E4D1C5025D7D1B572270B0BA7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsByTypeOfDeferredCompensationAxis_52922FCA21D428A77962B572270B1E8D" xlink:to="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_CDAA115E4D1C5025D7D1B572270B0BA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredProfitSharingMember" xlink:label="loc_us-gaap_DeferredProfitSharingMember_14C407F48E465F7B537DB572270BCED9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredBonusAndProfitSharingArrangementIndividualContractTypeOfDeferredCompensationDomain_CDAA115E4D1C5025D7D1B572270B0BA7" xlink:to="loc_us-gaap_DeferredProfitSharingMember_14C407F48E465F7B537DB572270BCED9" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ProfitSharePercentage" xlink:label="loc_aal_ProfitSharePercentage_F0F2D89C398DC5E37C6CB572270BB2A4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_AFF0E00BB2C8244C7AD1B572270B81D5" xlink:to="loc_aal_ProfitSharePercentage_F0F2D89C398DC5E37C6CB572270BB2A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent" xlink:label="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_8FDEA470008BF692C473B572270BB150" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredCompensationArrangementWithIndividualExcludingShareBasedPaymentsAndPostretirementBenefitsLineItems_AFF0E00BB2C8244C7AD1B572270B81D5" xlink:to="loc_us-gaap_DeferredCompensationLiabilityCurrentAndNoncurrent_8FDEA470008BF692C473B572270BB150" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansFairValuesOfRetireeMedicalAndOtherPostretirementBenefitPlansAssetsByAssetCategoryDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_6B5FEB08EAF2686E676BB5B6BFE79B87" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_6B5FEB08EAF2686E676BB5B6BFE79B87" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_05D008FCE54370485893B5B6BFE58023" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_05D008FCE54370485893B5B6BFE58023" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9B14F69C02423E22006FB5B6BFE51587_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_05D008FCE54370485893B5B6BFE58023" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9B14F69C02423E22006FB5B6BFE51587_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9B14F69C02423E22006FB5B6BFE51587" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_05D008FCE54370485893B5B6BFE58023" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9B14F69C02423E22006FB5B6BFE51587" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_DCA808D32C407E8C1DD8B5B6BFE53DCF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_9B14F69C02423E22006FB5B6BFE51587" xlink:to="loc_us-gaap_SubsidiariesMember_DCA808D32C407E8C1DD8B5B6BFE53DCF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_1D9F4FBEEA012FE095D9B5B6BFE57E4B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_1D9F4FBEEA012FE095D9B5B6BFE57E4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D4843045469E57D394F8B5B6BFE5F57D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1D9F4FBEEA012FE095D9B5B6BFE57E4B" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D4843045469E57D394F8B5B6BFE5F57D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D4843045469E57D394F8B5B6BFE5F57D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1D9F4FBEEA012FE095D9B5B6BFE57E4B" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D4843045469E57D394F8B5B6BFE5F57D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6C3E593955894B65CB36B5B6BFE53ACB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_D4843045469E57D394F8B5B6BFE5F57D" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6C3E593955894B65CB36B5B6BFE53ACB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_51EF06E8669BC62EB748B5B6BFE5F0BA" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_51EF06E8669BC62EB748B5B6BFE5F0BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_51EF06E8669BC62EB748B5B6BFE5F0BA" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_51EF06E8669BC62EB748B5B6BFE5F0BA" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_2FDD758601218AE87EEBB5B6BFE61A3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736" xlink:to="loc_us-gaap_MoneyMarketFundsMember_2FDD758601218AE87EEBB5B6BFE61A3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MutualFundMember" xlink:label="loc_us-gaap_MutualFundMember_028A7DD0D46AC28A1B36B5B6BFE60368" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C78ED84B3523E468F8B7B5B6BFE63736" xlink:to="loc_us-gaap_MutualFundMember_028A7DD0D46AC28A1B36B5B6BFE60368" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MutualFundAALClassMember" xlink:label="loc_aal_MutualFundAALClassMember_2DDF006925B4F7DAFDA5B5B6BFE6E479" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MutualFundMember_028A7DD0D46AC28A1B36B5B6BFE60368" xlink:to="loc_aal_MutualFundAALClassMember_2DDF006925B4F7DAFDA5B5B6BFE6E479" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MutualFundsInstitutionalClassMember" xlink:label="loc_aal_MutualFundsInstitutionalClassMember_832CA1041832AEFF81D2B5B6BFE6D93A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MutualFundMember_028A7DD0D46AC28A1B36B5B6BFE60368" xlink:to="loc_aal_MutualFundsInstitutionalClassMember_832CA1041832AEFF81D2B5B6BFE6D93A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesByInvestmentObjectiveAxis" xlink:label="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_513B97620029347E3C04B5B6BFE65F15" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:to="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_513B97620029347E3C04B5B6BFE65F15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_A486E388927B0052956EB5B6BFE7C182_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_513B97620029347E3C04B5B6BFE65F15" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_A486E388927B0052956EB5B6BFE7C182_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_A486E388927B0052956EB5B6BFE7C182" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_513B97620029347E3C04B5B6BFE65F15" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_A486E388927B0052956EB5B6BFE7C182" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InternationalCompaniesMember" xlink:label="loc_aal_InternationalCompaniesMember_618805EBEB43FC2146A5B5B6BFE78CAE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_A486E388927B0052956EB5B6BFE7C182" xlink:to="loc_aal_InternationalCompaniesMember_618805EBEB43FC2146A5B5B6BFE78CAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2BF9C3FBDDC276027ED9B5B6BFE7C007" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_636D4C82ACC3FF39418BB5B6BFE5D836" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2BF9C3FBDDC276027ED9B5B6BFE7C007" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2BF9C3FBDDC276027ED9B5B6BFE7C007" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2BF9C3FBDDC276027ED9B5B6BFE7C007" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_DF7321C7BC0DCAFB72F8B5B6BFE763C6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_DF7321C7BC0DCAFB72F8B5B6BFE763C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_0BC86A4B3843FFB11C04B5B6BFE7C632" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_944EC5FAFB7B63B9C1A8B5B6BFE783C9" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_0BC86A4B3843FFB11C04B5B6BFE7C632" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_98DCD51C90401AE7FD04B5B6BFE7EFC7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_6B5FEB08EAF2686E676BB5B6BFE79B87" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_98DCD51C90401AE7FD04B5B6BFE7EFC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_6DD84437ADDD586B2551B5B6BFE7AE86" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_6B5FEB08EAF2686E676BB5B6BFE79B87" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_6DD84437ADDD586B2551B5B6BFE7AE86" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAccumulatedBenefitObligationsExceedingFairValueOfPlanAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_46412BD34A0EA1E3725BB572274F04E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_46412BD34A0EA1E3725BB572274F04E7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_62615ABD1FBD44DD70B0B572274F75E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_46412BD34A0EA1E3725BB572274F04E7" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_62615ABD1FBD44DD70B0B572274F75E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_71993F06110D209CFEA9B5722750DC55_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_62615ABD1FBD44DD70B0B572274F75E1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_71993F06110D209CFEA9B5722750DC55_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_71993F06110D209CFEA9B5722750DC55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_62615ABD1FBD44DD70B0B572274F75E1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_71993F06110D209CFEA9B5722750DC55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_C1ED38F599AEC8DF7F25B5722750B978" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_71993F06110D209CFEA9B5722750DC55" xlink:to="loc_us-gaap_SubsidiariesMember_C1ED38F599AEC8DF7F25B5722750B978" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_96DFE8556A9C6F25CA3FB572275029AB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_46412BD34A0EA1E3725BB572274F04E7" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_96DFE8556A9C6F25CA3FB572275029AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_96DFE8556A9C6F25CA3FB572275029AB" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_96DFE8556A9C6F25CA3FB572275029AB" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_D518C9BD8F5D61F94DE5B57227507506" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_D518C9BD8F5D61F94DE5B57227507506" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E32594EE930DA10E75B7B57227505715" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_436E08A4FBB82E1BEEA8B5722750BF85" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_E32594EE930DA10E75B7B57227505715" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_F80F5BFE0F82AC07401BB572275048E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation_F80F5BFE0F82AC07401BB572275048E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_5F6FFF5A8BBD9F6D1B72B57227501D53" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateAccumulatedBenefitObligation_5F6FFF5A8BBD9F6D1B72B57227501D53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation_0CA1E378DE9D26AFF3EFB57227508731" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateBenefitObligation_0CA1E378DE9D26AFF3EFB57227508731" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_2A22405820D692CA04D6B57227506495" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_2A22405820D692CA04D6B57227506495" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_67682160D646F9044D87B5722750AF4B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_06590E8D609C9020AF25B572275079C6" xlink:to="loc_us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets_67682160D646F9044D87B5722750AF4B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAllocationOfPlanAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9E40F75866CC3457FB1AB5722739B360" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_795EF4DFAD587AED7135B5722737D8EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9E40F75866CC3457FB1AB5722739B360" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_795EF4DFAD587AED7135B5722737D8EE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_769C3EC8A6EDC4E402BCB57227371B1C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_795EF4DFAD587AED7135B5722737D8EE" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_769C3EC8A6EDC4E402BCB57227371B1C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BD94614BCE86BAED76BBB5722737C934_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_769C3EC8A6EDC4E402BCB57227371B1C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BD94614BCE86BAED76BBB5722737C934_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BD94614BCE86BAED76BBB5722737C934" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_769C3EC8A6EDC4E402BCB57227371B1C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BD94614BCE86BAED76BBB5722737C934" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_E68790454C6341237F7BB57227374696" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_BD94614BCE86BAED76BBB5722737C934" xlink:to="loc_us-gaap_SubsidiariesMember_E68790454C6341237F7BB57227374696" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_58DF6748C71529EAF843B5722738DF3E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_795EF4DFAD587AED7135B5722737D8EE" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_58DF6748C71529EAF843B5722738DF3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_58DF6748C71529EAF843B5722738DF3E" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_58DF6748C71529EAF843B5722738DF3E" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMember" xlink:label="loc_us-gaap_EquityMember_FD89AD9A6DCB8AD92CF6B57227382606" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_us-gaap_EquityMember_FD89AD9A6DCB8AD92CF6B57227382606" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_UnitedStatesLargeMember" xlink:label="loc_aal_UnitedStatesLargeMember_44F607D91F93E8AFC846B5722738990F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_UnitedStatesLargeMember_44F607D91F93E8AFC846B5722738990F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_UnitedStatesSmallMidMember" xlink:label="loc_aal_UnitedStatesSmallMidMember_D467FFEE9B810D37E702B5722738EAD2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_UnitedStatesSmallMidMember_D467FFEE9B810D37E702B5722738EAD2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InternationalValuesMember" xlink:label="loc_aal_InternationalValuesMember_D2999AF6B930FCDD7936B57227386828" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_InternationalValuesMember_D2999AF6B930FCDD7936B57227386828" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmergingMarketsMember" xlink:label="loc_aal_EmergingMarketsMember_8D53C27C1357D3326466B5722738B6B4" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_EmergingMarketsMember_8D53C27C1357D3326466B5722738B6B4" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AlternativeInvestmentMember" xlink:label="loc_aal_AlternativeInvestmentMember_1B0D20EB564FA5CABA7BB57227380772" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_AlternativeInvestmentMember_1B0D20EB564FA5CABA7BB57227380772" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_FixedIncomeMember" xlink:label="loc_aal_FixedIncomeMember_81B9D4FBB4CEB517329BB57227385A4B" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_FixedIncomeMember_81B9D4FBB4CEB517329BB57227385A4B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_FixedIncomeUSLongDurationMember" xlink:label="loc_aal_FixedIncomeUSLongDurationMember_122D00B7343943F888B3B5722738ABBC" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_FixedIncomeUSLongDurationMember_122D00B7343943F888B3B5722738ABBC" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_FixedIncomeEmergingMarketsMember" xlink:label="loc_aal_FixedIncomeEmergingMarketsMember_07E9F7A70C0DE69BD915B57227383C54" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_FixedIncomeEmergingMarketsMember_07E9F7A70C0DE69BD915B57227383C54" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_PrivateFixedIncomeMember" xlink:label="loc_aal_PrivateFixedIncomeMember_23D8CBE4040B9A5FFA73B57227389351" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_PrivateFixedIncomeMember_23D8CBE4040B9A5FFA73B57227389351" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherPlanAssetCategoryMember" xlink:label="loc_aal_OtherPlanAssetCategoryMember_5E04BE62679B6CB34893B57227383447" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_aal_OtherPlanAssetCategoryMember_5E04BE62679B6CB34893B57227383447" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashEquivalentsMember" xlink:label="loc_us-gaap_CashEquivalentsMember_D65A4EE595FEBB815323B5722738B505" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_5ED85618C59C1CC36E46B57227386A91" xlink:to="loc_us-gaap_CashEquivalentsMember_D65A4EE595FEBB815323B5722738B505" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_D9D00B4EF41CF9C7E849B572273874E9" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_795EF4DFAD587AED7135B5722737D8EE" xlink:to="loc_us-gaap_RangeAxis_D9D00B4EF41CF9C7E849B572273874E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_D9D00B4EF41CF9C7E849B572273874E9" xlink:to="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_D9D00B4EF41CF9C7E849B572273874E9" xlink:to="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_C94568DD1EF9D0B6BBDBB57227399B05" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3" xlink:to="loc_us-gaap_MinimumMember_C94568DD1EF9D0B6BBDBB57227399B05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B54C3B997B35A581B3B5B5722739BEE8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_192A64413B2F7715E211B5722738EEB3" xlink:to="loc_us-gaap_MaximumMember_B54C3B997B35A581B3B5B5722739BEE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_F88BEE858764CA065676B5722739DB45" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_9E40F75866CC3457FB1AB5722739B360" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsTargetAllocationPercentage_F88BEE858764CA065676B5722739DB45" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAmountsRecognizedInConsolidatedBalanceSheetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B34A3428C41D4EB2C7B5722759011D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FC88EE32F8838046BCB6B57227589D0C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B34A3428C41D4EB2C7B5722759011D" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FC88EE32F8838046BCB6B57227589D0C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_2CD107BC5E5D3F139760B57227598D77" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FC88EE32F8838046BCB6B57227589D0C" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_2CD107BC5E5D3F139760B57227598D77" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6CC8DAF928884C6F5D64B5722759B8B6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2CD107BC5E5D3F139760B57227598D77" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6CC8DAF928884C6F5D64B5722759B8B6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6CC8DAF928884C6F5D64B5722759B8B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2CD107BC5E5D3F139760B57227598D77" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6CC8DAF928884C6F5D64B5722759B8B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_18F794CF0C78C6C2FC5CB57227595246" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_6CC8DAF928884C6F5D64B5722759B8B6" xlink:to="loc_us-gaap_SubsidiariesMember_18F794CF0C78C6C2FC5CB57227595246" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_287FDFA78D7C4B1197F1B5722759C59F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_FC88EE32F8838046BCB6B57227589D0C" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_287FDFA78D7C4B1197F1B5722759C59F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_287FDFA78D7C4B1197F1B5722759C59F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_287FDFA78D7C4B1197F1B5722759C59F" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_8312BF1DC911ED8EE219B57227591858" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_8312BF1DC911ED8EE219B57227591858" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2A09925042D06C1A575FB57227593EBA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_2D913A35B21A80590B61B572275967A9" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_2A09925042D06C1A575FB57227593EBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_8526BA036E1D68154135B572275986E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B34A3428C41D4EB2C7B5722759011D" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansCurrentLiabilities_8526BA036E1D68154135B572275986E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_92AB9261DF67F5E1BFDAB5722759DF4C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B34A3428C41D4EB2C7B5722759011D" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_92AB9261DF67F5E1BFDAB5722759DF4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_558E2D7E2F891B588B48B572275923DB" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_35B34A3428C41D4EB2C7B5722759011D" xlink:to="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent_558E2D7E2F891B588B48B572275923DB" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAmountsRecognizedInOtherComprehensiveIncomeDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3FC7AA6EC00B9CB79C2B5722755161F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E4D9EA503F26E7A3419AB57227546EFB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3FC7AA6EC00B9CB79C2B5722755161F" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E4D9EA503F26E7A3419AB57227546EFB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_69F2E08502608188B15FB57227546693" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E4D9EA503F26E7A3419AB57227546EFB" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_69F2E08502608188B15FB57227546693" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7DEA435B62E059B32BBFB57227545DA0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_69F2E08502608188B15FB57227546693" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7DEA435B62E059B32BBFB57227545DA0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7DEA435B62E059B32BBFB57227545DA0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_69F2E08502608188B15FB57227546693" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7DEA435B62E059B32BBFB57227545DA0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_9FE756AAA01B82C55C3DB5722754C07D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_7DEA435B62E059B32BBFB57227545DA0" xlink:to="loc_us-gaap_SubsidiariesMember_9FE756AAA01B82C55C3DB5722754C07D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_9CFE81A25C59F391CBAEB57227540EC5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E4D9EA503F26E7A3419AB57227546EFB" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_9CFE81A25C59F391CBAEB57227540EC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_9CFE81A25C59F391CBAEB57227540EC5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_9CFE81A25C59F391CBAEB57227540EC5" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_B75CF18EBE0FE057ABCAB572275584E7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_B75CF18EBE0FE057ABCAB572275584E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_837D10C4CEC8CB71F0BBB5722755D27D" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9945362555B7F3BEFF96B57227546003" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_837D10C4CEC8CB71F0BBB5722755D27D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_A3344ACCAA53C5919803B57227551930" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3FC7AA6EC00B9CB79C2B5722755161F" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax_A3344ACCAA53C5919803B57227551930" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_0ADED0DA24EC76161AECB57227551FDE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3FC7AA6EC00B9CB79C2B5722755161F" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax_0ADED0DA24EC76161AECB57227551FDE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax" xlink:label="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_2A731693625B838722B5B57227558FBF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E3FC7AA6EC00B9CB79C2B5722755161F" xlink:to="loc_us-gaap_DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeBeforeTax_2A731693625B838722B5B57227558FBF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfAssumptionUsedToDetermineBenefitObligationsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D533A4E7207271CDCFA9B5722745CD02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D533A4E7207271CDCFA9B5722745CD02" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E22D1779ED2D79862AAEB57227456BEB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D533A4E7207271CDCFA9B5722745CD02" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E22D1779ED2D79862AAEB57227456BEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F3DF98ACFC53D1C7FDF1B5722745AD0D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E22D1779ED2D79862AAEB57227456BEB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F3DF98ACFC53D1C7FDF1B5722745AD0D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F3DF98ACFC53D1C7FDF1B5722745AD0D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E22D1779ED2D79862AAEB57227456BEB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F3DF98ACFC53D1C7FDF1B5722745AD0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_55512F812B574CBF8050B5722745AB28" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F3DF98ACFC53D1C7FDF1B5722745AD0D" xlink:to="loc_us-gaap_SubsidiariesMember_55512F812B574CBF8050B5722745AB28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_67D3036D46E8BBE1676FB5722745B2AF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_D533A4E7207271CDCFA9B5722745CD02" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_67D3036D46E8BBE1676FB5722745B2AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_67D3036D46E8BBE1676FB5722745B2AF" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_67D3036D46E8BBE1676FB5722745B2AF" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_8D557A2A96D89B70BED6B572274553BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_8D557A2A96D89B70BED6B572274553BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_D00F08EAF516B2634C23B5722746EB74" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_5693E3505EBBDD7EC8F5B5722745FDB6" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_D00F08EAF516B2634C23B5722746EB74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_5550C6F4748505A457B4B572274689B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_5550C6F4748505A457B4B572274689B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_6E14574EC0993367385FB5722746974E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostDiscountRate_6E14574EC0993367385FB5722746974E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_F0DE89F80D5478B5FACEB5722746CF4D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets_F0DE89F80D5478B5FACEB5722746CF4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear" xlink:label="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_E51636B239C2AB37B635B5722746F88A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear_E51636B239C2AB37B635B5722746F88A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1" xlink:label="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_F8C67CE7EEAAC0C29957B57227468855" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_D0179126583C92942033B5722746CECA" xlink:to="loc_us-gaap_DefinedBenefitPlanUltimateHealthCareCostTrendRate1_F8C67CE7EEAAC0C29957B57227468855" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfChangesInFairValueOfPlanAssetsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_132A98604947D50A1BF0B5EB2CBFE3D3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_132A98604947D50A1BF0B5EB2CBFE3D3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_472226A3142D335ABE9AB5EB2CBF85F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_132A98604947D50A1BF0B5EB2CBFE3D3" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_472226A3142D335ABE9AB5EB2CBF85F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_37C733BFA785E8BB075AB5EB2CBF3866_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_472226A3142D335ABE9AB5EB2CBF85F2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_37C733BFA785E8BB075AB5EB2CBF3866_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_37C733BFA785E8BB075AB5EB2CBF3866" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_472226A3142D335ABE9AB5EB2CBF85F2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_37C733BFA785E8BB075AB5EB2CBF3866" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_4930929C6F796C1CF9C2B5EB2CBF8627" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_37C733BFA785E8BB075AB5EB2CBF3866" xlink:to="loc_us-gaap_SubsidiariesMember_4930929C6F796C1CF9C2B5EB2CBF8627" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_38541A3E8B7144BCF37AB5EB2CBFE8B7" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_132A98604947D50A1BF0B5EB2CBFE3D3" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_38541A3E8B7144BCF37AB5EB2CBFE8B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_38541A3E8B7144BCF37AB5EB2CBFE8B7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_38541A3E8B7144BCF37AB5EB2CBFE8B7" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_866D6807A5E33D079C36B5EB2CC09370" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_866D6807A5E33D079C36B5EB2CC09370" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_CB7AF2AE510857F7B201B5EB2CC0D5A6" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_1223FD692D5104EBA8CEB5EB2CC07394" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_CB7AF2AE510857F7B201B5EB2CC0D5A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_7DC4BE3C97538751FFD3B5EB2CC0ED06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_7DC4BE3C97538751FFD3B5EB2CC0ED06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_963E71E13BE8A41D74C2B5EB2CC0D470" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanActualReturnOnPlanAssets_963E71E13BE8A41D74C2B5EB2CC0D470" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanContributionsByEmployer" xlink:label="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_8FB92F7A9ABD60CE0FE4B5EB2CC013D0" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanContributionsByEmployer_8FB92F7A9ABD60CE0FE4B5EB2CC013D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanSettlementsPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_0E620C223835394C4862B5EB2CC0B38B" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanSettlementsPlanAssets_0E620C223835394C4862B5EB2CC0B38B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_72B0ED55080A31C30CEFB5EB2CC0662E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAssetsBenefitsPaid_72B0ED55080A31C30CEFB5EB2CC0662E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_ABEABA75A1BF0CCC2326B5EB2CC0FB93" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInFairValueOfPlanAssetsRollForward_263CDD58B1B599C2FF6BB5EB2CC08E29" xlink:to="loc_us-gaap_DefinedBenefitPlanAssetsTransferredToFromPlan_ABEABA75A1BF0CCC2326B5EB2CC0FB93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_39F2D50BC2E6539FFF01B5EB2CC0FBDB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:to="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_39F2D50BC2E6539FFF01B5EB2CC0FBDB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanSupplementalContributionsByEmployer" xlink:label="loc_aal_DefinedBenefitPlanSupplementalContributionsByEmployer_424A5F6CB5A17BD5F35AB5EB2CC0965F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:to="loc_aal_DefinedBenefitPlanSupplementalContributionsByEmployer_424A5F6CB5A17BD5F35AB5EB2CC0965F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanMinimumContributionsbyEmployer" xlink:label="loc_aal_DefinedBenefitPlanMinimumContributionsbyEmployer_5A1A35DE0832FD3B3C1FB5EB2CC0B314" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_0CDBAE0A62803624FB8AB5EB2CC0B721" xlink:to="loc_aal_DefinedBenefitPlanMinimumContributionsbyEmployer_5A1A35DE0832FD3B3C1FB5EB2CC0B314" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfChangesInProjectedBenefitObligationsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A6C14748BD09D9432B43B57227640346" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06D50FEDDEBB46FCD743B572276356ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A6C14748BD09D9432B43B57227640346" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06D50FEDDEBB46FCD743B572276356ED" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_2321D0016097BD128F6BB5722763928B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06D50FEDDEBB46FCD743B572276356ED" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_2321D0016097BD128F6BB5722763928B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_91943B31AE6C4D06E30FB5722763C419_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2321D0016097BD128F6BB5722763928B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_91943B31AE6C4D06E30FB5722763C419_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_91943B31AE6C4D06E30FB5722763C419" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_2321D0016097BD128F6BB5722763928B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_91943B31AE6C4D06E30FB5722763C419" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_11CA134A44A605496C52B5722763C455" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_91943B31AE6C4D06E30FB5722763C419" xlink:to="loc_us-gaap_SubsidiariesMember_11CA134A44A605496C52B5722763C455" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_F00E063CC50ED10CDC2CB5722763ED12" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_06D50FEDDEBB46FCD743B572276356ED" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_F00E063CC50ED10CDC2CB5722763ED12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F00E063CC50ED10CDC2CB5722763ED12" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_F00E063CC50ED10CDC2CB5722763ED12" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_C2F93957BB06B95B96C6B57227642530" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_C2F93957BB06B95B96C6B57227642530" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6C5AA20EEEB54FBA9D68B5722764B1AD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_13CBBAE00AA1B6C685B3B5722763EDAD" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_6C5AA20EEEB54FBA9D68B5722764B1AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward" xlink:label="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_A6C14748BD09D9432B43B57227640346" xlink:to="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_4CF5B1417355EFDDC9A1B5722764951C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_4CF5B1417355EFDDC9A1B5722764951C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_213630383A88A77F7E1DB57227649C37" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_213630383A88A77F7E1DB57227649C37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_A2EEA4645A675277FE82B572276452BF" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_A2EEA4645A675277FE82B572276452BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanActuarialGainLoss" xlink:label="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_DA56737C9FB82541960BB572276401D4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanActuarialGainLoss_DA56737C9FB82541960BB572276401D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanPlanAmendments" xlink:label="loc_us-gaap_DefinedBenefitPlanPlanAmendments_0950749B236705EDDA2EB57227648B12" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanPlanAmendments_0950749B236705EDDA2EB57227648B12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement_C3FFBBD012ED6ECFE7F4B5722764BCA2" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationPaymentForSettlement_C3FFBBD012ED6ECFE7F4B5722764BCA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_4679775B7D03B4519690B5722764658A" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligationBenefitsPaid_4679775B7D03B4519690B5722764658A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanOtherChanges" xlink:label="loc_us-gaap_DefinedBenefitPlanOtherChanges_658C1D38BCC8E25B841DB572276486F6" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanChangeInBenefitObligationRollForward_6E6D18A5A9AD97761CD6B5722764A916" xlink:to="loc_us-gaap_DefinedBenefitPlanOtherChanges_658C1D38BCC8E25B841DB572276486F6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfExpectedFutureServiceBenefitPaymentsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E3A38806A963CD62CE27B572273D8039" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E3A38806A963CD62CE27B572273D8039" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_8FEA76586E493D09B4AAB572273D8796" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E3A38806A963CD62CE27B572273D8039" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_8FEA76586E493D09B4AAB572273D8796" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_8284EFCE6473061CEF81B572273D4C57_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8FEA76586E493D09B4AAB572273D8796" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_8284EFCE6473061CEF81B572273D4C57_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_8284EFCE6473061CEF81B572273D4C57" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8FEA76586E493D09B4AAB572273D8796" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_8284EFCE6473061CEF81B572273D4C57" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_DA40C425A6FFEFD48B51B572273DCDC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_8284EFCE6473061CEF81B572273D4C57" xlink:to="loc_us-gaap_SubsidiariesMember_DA40C425A6FFEFD48B51B572273DCDC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_B26DA92D3E71BEAB0527B572273D529E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_E3A38806A963CD62CE27B572273D8039" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_B26DA92D3E71BEAB0527B572273D529E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B26DA92D3E71BEAB0527B572273D529E" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_B26DA92D3E71BEAB0527B572273D529E" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_2389F8033A99CEC318A0B572273D07E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_2389F8033A99CEC318A0B572273D07E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_66F7C4B278610DEC38EBB572273D04CA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_02E40B397B55830EC7CFB572273DDF85" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_66F7C4B278610DEC38EBB572273D04CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_CFC29000E5FCF6F405F9B572273D7AE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_CFC29000E5FCF6F405F9B572273D7AE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_2505064845B10594ED89B572273DBD86" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_2505064845B10594ED89B572273DBD86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_C577C1B20450381829AEB572273E038C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_C577C1B20450381829AEB572273E038C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_A3728AE6913505B8DFDBB572273ED1B2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_A3728AE6913505B8DFDBB572273ED1B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_F0F7202EB01653DA8C28B572273EA219" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_F0F7202EB01653DA8C28B572273EA219" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_D31B0226AE9C2C73833EB572273E12F6" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_FF8D0250E058E86AB4B8B572273D9FAC" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_D31B0226AE9C2C73833EB572273E12F6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1160D58B9225F892980CB57227320EFE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1160D58B9225F892980CB57227320EFE" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_14CD75D12E49F8DB215AB572272F602A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_14CD75D12E49F8DB215AB572272F602A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_C319CDC76070B036BAD4B572272F3B6C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_14CD75D12E49F8DB215AB572272F602A" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_C319CDC76070B036BAD4B572272F3B6C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_C319CDC76070B036BAD4B572272F3B6C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_14CD75D12E49F8DB215AB572272F602A" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_C319CDC76070B036BAD4B572272F3B6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_2959A936C50AEA187E0AB5722730A780" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_C319CDC76070B036BAD4B572272F3B6C" xlink:to="loc_us-gaap_SubsidiariesMember_2959A936C50AEA187E0AB5722730A780" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_FF309A4C0B85418AEEC4B57227304CD4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_FF309A4C0B85418AEEC4B57227304CD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9DADD71D2FE803049871B57227303C35_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_FF309A4C0B85418AEEC4B57227304CD4" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9DADD71D2FE803049871B57227303C35_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_9DADD71D2FE803049871B57227303C35" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_FF309A4C0B85418AEEC4B57227304CD4" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_9DADD71D2FE803049871B57227303C35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_A09169A6876BE01D750FB5722730BF73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_9DADD71D2FE803049871B57227303C35" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_A09169A6876BE01D750FB5722730BF73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_92DF2C0E7AD175EDB361B57227308A4E" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_92DF2C0E7AD175EDB361B57227308A4E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CCD85F3FB36EBA539101B57227309A91_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_92DF2C0E7AD175EDB361B57227308A4E" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CCD85F3FB36EBA539101B57227309A91_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_CCD85F3FB36EBA539101B57227309A91" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_92DF2C0E7AD175EDB361B57227308A4E" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_CCD85F3FB36EBA539101B57227309A91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_C6E50AE4BB78D963FDC0B5722730B8FA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_CCD85F3FB36EBA539101B57227309A91" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_C6E50AE4BB78D963FDC0B5722730B8FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_CE380C70694F6614B1E7B5722730EA2C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_CE380C70694F6614B1E7B5722730EA2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_CE380C70694F6614B1E7B5722730EA2C" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_CE380C70694F6614B1E7B5722730EA2C" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_92273BC9E7D18384B31EB5722730515A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_92273BC9E7D18384B31EB5722730515A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesMember" xlink:label="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InternationalMarketsMember" xlink:label="loc_aal_InternationalMarketsMember_8D6FFD659F2AF0E6B202B5722730F676" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:to="loc_aal_InternationalMarketsMember_8D6FFD659F2AF0E6B202B5722730F676" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LargeCapCompaniesMember" xlink:label="loc_aal_LargeCapCompaniesMember_4E5D6AD91D451FA80A74B5722730C556" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:to="loc_aal_LargeCapCompaniesMember_4E5D6AD91D451FA80A74B5722730C556" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MidCapCompaniesMember" xlink:label="loc_aal_MidCapCompaniesMember_C17A60F220D32D0EEA32B5722731C861" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:to="loc_aal_MidCapCompaniesMember_C17A60F220D32D0EEA32B5722731C861" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SmallCapCompaniesMember" xlink:label="loc_aal_SmallCapCompaniesMember_D75772FC412692342B28B5722731A901" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:to="loc_aal_SmallCapCompaniesMember_D75772FC412692342B28B5722731A901" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MutualFundMember" xlink:label="loc_us-gaap_MutualFundMember_1674AE7939B5C7748969B5722731453E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesMember_A24EA62FB5DE5A8AAF2DB5722730F792" xlink:to="loc_us-gaap_MutualFundMember_1674AE7939B5C7748969B5722731453E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtSecuritiesMember" xlink:label="loc_us-gaap_DebtSecuritiesMember_60250AE834A17C915B9CB5722731D9FC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_us-gaap_DebtSecuritiesMember_60250AE834A17C915B9CB5722731D9FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_113748CF5B090CD3F5C6B57227312565" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_60250AE834A17C915B9CB5722731D9FC" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_113748CF5B090CD3F5C6B57227312565" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_9AB59E74F7D536EA33E0B5722731ECBB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_60250AE834A17C915B9CB5722731D9FC" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_9AB59E74F7D536EA33E0B5722731ECBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="loc_us-gaap_MunicipalBondsMember_F62DD3999BB05D011F06B5722731E794" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtSecuritiesMember_60250AE834A17C915B9CB5722731D9FC" xlink:to="loc_us-gaap_MunicipalBondsMember_F62DD3999BB05D011F06B5722731E794" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AlternativeInvestmentMember" xlink:label="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrivateEquityFundsMember" xlink:label="loc_us-gaap_PrivateEquityFundsMember_46FE08A3901FE0049DD8B5722731EE80" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:to="loc_us-gaap_PrivateEquityFundsMember_46FE08A3901FE0049DD8B5722731EE80" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_PrivateEquityPartnershipsMeasuredAtNetAssetValueMember" xlink:label="loc_aal_PrivateEquityPartnershipsMeasuredAtNetAssetValueMember_4C8FCD7DB5B3BBAA9B3BB57227316C5F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:to="loc_aal_PrivateEquityPartnershipsMeasuredAtNetAssetValueMember_4C8FCD7DB5B3BBAA9B3BB57227316C5F" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommonCollectiveTrustsMember" xlink:label="loc_aal_CommonCollectiveTrustsMember_FBF2F54F7F9014D1DDE6B5722731A439" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:to="loc_aal_CommonCollectiveTrustsMember_FBF2F54F7F9014D1DDE6B5722731A439" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommonCollectiveTrustand1032InvestmentTrustsMember" xlink:label="loc_aal_CommonCollectiveTrustand1032InvestmentTrustsMember_B83A0DDFC1FE735C2BEAB57227311DB2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:to="loc_aal_CommonCollectiveTrustand1032InvestmentTrustsMember_B83A0DDFC1FE735C2BEAB57227311DB2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InsuranceGroupAnnuityContractsMember" xlink:label="loc_aal_InsuranceGroupAnnuityContractsMember_353F0D71291B43838F1CB57227315967" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_AlternativeInvestmentMember_72BE589D21F1D77013BAB57227314345" xlink:to="loc_aal_InsuranceGroupAnnuityContractsMember_353F0D71291B43838F1CB57227315967" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DividendAndInterestReceivableMember" xlink:label="loc_aal_DividendAndInterestReceivableMember_22716CD02D5E703C6D26B5722731975B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_aal_DividendAndInterestReceivableMember_22716CD02D5E703C6D26B5722731975B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DueToFromBrokersForSaleOfSecuritiesMember" xlink:label="loc_aal_DueToFromBrokersForSaleOfSecuritiesMember_EB869C939A5C05E6168FB5722731A6D4" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_aal_DueToFromBrokersForSaleOfSecuritiesMember_EB869C939A5C05E6168FB5722731A6D4" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherPlanAssetCategoriesLiabilitiesNetMember" xlink:label="loc_aal_OtherPlanAssetCategoriesLiabilitiesNetMember_8357F092CDC5EA86E9B3B5722731D7FA" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_1E98E965D56B6FFC78FAB572273097DB" xlink:to="loc_aal_OtherPlanAssetCategoriesLiabilitiesNetMember_8357F092CDC5EA86E9B3B5722731D7FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E60CB513EC791B61424BB572273142E9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_F869FF88E33A1ADEE16DB572272F4ACA" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E60CB513EC791B61424BB572273142E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E60CB513EC791B61424BB572273142E9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_E60CB513EC791B61424BB572273142E9" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_3B8EC390BD0F6A47E375B5722732FF9D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_3B8EC390BD0F6A47E375B5722732FF9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_C3CB7646A210E2067EE6B5722732B728" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_C3CB7646A210E2067EE6B5722732B728" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_ADC62EE353BDA06491E0B5722732C880" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_09A371DB92B1439D43E6B5722732F006" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_ADC62EE353BDA06491E0B5722732C880" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_EF3C238EDCE4797A2396B5722732D7CF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_1160D58B9225F892980CB57227320EFE" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_EF3C238EDCE4797A2396B5722732D7CF" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryParentheticalDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_EDBAB9A72FE9F0F58D65B5722726C53C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_EDBAB9A72FE9F0F58D65B5722726C53C" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis" xlink:label="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_B1CC548A8376E79400DFB5722723B242" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:to="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_B1CC548A8376E79400DFB5722723B242" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_B1CC548A8376E79400DFB5722723B242" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanAssetCategoriesDomain" xlink:label="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis_B1CC548A8376E79400DFB5722723B242" xlink:to="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InternationalMarketsMember" xlink:label="loc_aal_InternationalMarketsMember_500AADDAB4273114E65DB5722724E36F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_aal_InternationalMarketsMember_500AADDAB4273114E65DB5722724E36F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MutualFundMember" xlink:label="loc_us-gaap_MutualFundMember_5D53D0EEC480D6D5353EB57227243C3F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_us-gaap_MutualFundMember_5D53D0EEC480D6D5353EB57227243C3F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_E4615533F70DA39D210EB5722724D385" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_E4615533F70DA39D210EB5722724D385" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_USGovernmentDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentDebtSecuritiesMember_3190E64096C82C9C18CCB5722724AA82" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_us-gaap_USGovernmentDebtSecuritiesMember_3190E64096C82C9C18CCB5722724AA82" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PrivateEquityFundsMember" xlink:label="loc_us-gaap_PrivateEquityFundsMember_425353234CEA2252EE1CB5722724B436" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_us-gaap_PrivateEquityFundsMember_425353234CEA2252EE1CB5722724B436" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommonCollectiveTrustand1032InvestmentTrustsMember" xlink:label="loc_aal_CommonCollectiveTrustand1032InvestmentTrustsMember_F810A8175FE7A64565B3B5722724EB94" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanAssetCategoriesDomain_C5CA05CC4A52BD60F342B57227246AEE" xlink:to="loc_aal_CommonCollectiveTrustand1032InvestmentTrustsMember_F810A8175FE7A64565B3B5722724EB94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesByInvestmentObjectiveAxis" xlink:label="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_B0A717221DCE6A026BE0B5722724BEDF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:to="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_B0A717221DCE6A026BE0B5722724BEDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_B0A717221DCE6A026BE0B5722724BEDF" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquitySecuritiesInvestmentObjectiveMember" xlink:label="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_EquitySecuritiesByInvestmentObjectiveAxis_B0A717221DCE6A026BE0B5722724BEDF" xlink:to="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_USCompaniesMember" xlink:label="loc_aal_USCompaniesMember_1BA4088074057AD0DDC4B572272444FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_USCompaniesMember_1BA4088074057AD0DDC4B572272444FC" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_USGovernmentDebtSecuritiesandCorporateDebtSecuritiesMember" xlink:label="loc_aal_USGovernmentDebtSecuritiesandCorporateDebtSecuritiesMember_BEF583BDFB8D12F7CED6B5722724ED72" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_USGovernmentDebtSecuritiesandCorporateDebtSecuritiesMember_BEF583BDFB8D12F7CED6B5722724ED72" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_InternationalCompaniesMember" xlink:label="loc_aal_InternationalCompaniesMember_2A351F436A240F986B8DB5722724B226" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_InternationalCompaniesMember_2A351F436A240F986B8DB5722724B226" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CorporateDebtWithStandardAndPoorsRatingLowerThanAMember" xlink:label="loc_aal_CorporateDebtWithStandardAndPoorsRatingLowerThanAMember_59C9AFA771E9B3295238B57227240BC9" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_CorporateDebtWithStandardAndPoorsRatingLowerThanAMember_59C9AFA771E9B3295238B57227240BC9" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CorporateDebtWithStandardAndPoorsRatingAOrHigherMember" xlink:label="loc_aal_CorporateDebtWithStandardAndPoorsRatingAOrHigherMember_DA5624BD69FA57A62370B5722725966E" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_CorporateDebtWithStandardAndPoorsRatingAOrHigherMember_DA5624BD69FA57A62370B5722725966E" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmergingMarketCompaniesMember" xlink:label="loc_aal_EmergingMarketCompaniesMember_D2AE81E4B745602A8524B5722725C179" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_EmergingMarketCompaniesMember_D2AE81E4B745602A8524B5722725C179" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DomesticGovernmentSecuritiesMember" xlink:label="loc_aal_DomesticGovernmentSecuritiesMember_1F3E8EB3E06951A1954DB57227251484" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_DomesticGovernmentSecuritiesMember_1F3E8EB3E06951A1954DB57227251484" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmergingMarketGovernmentSecuritiesMember" xlink:label="loc_aal_EmergingMarketGovernmentSecuritiesMember_23D7EFCC8B9F1217EE36B57227256C26" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_EmergingMarketGovernmentSecuritiesMember_23D7EFCC8B9F1217EE36B57227256C26" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherInternationalGovernmentSecuritiesMember" xlink:label="loc_aal_OtherInternationalGovernmentSecuritiesMember_B10788AD3E49C92EF48EB5722725C7AB" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_OtherInternationalGovernmentSecuritiesMember_B10788AD3E49C92EF48EB5722725C7AB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_USBuyoutOpportunitiesMember" xlink:label="loc_aal_USBuyoutOpportunitiesMember_09AB40FFF679163DC6A1B57227250860" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_USBuyoutOpportunitiesMember_09AB40FFF679163DC6A1B57227250860" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EuropeanBuyoutOpportunitiesMember" xlink:label="loc_aal_EuropeanBuyoutOpportunitiesMember_1F5774BE81E672887B75B57227255344" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_EuropeanBuyoutOpportunitiesMember_1F5774BE81E672887B75B57227255344" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CollectiveInterestTrustMember" xlink:label="loc_aal_CollectiveInterestTrustMember_0B24A614CD7F8F9F00D8B57227254020" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_CollectiveInterestTrustMember_0B24A614CD7F8F9F00D8B57227254020" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmergingMarket10312InvestmentTrustMember" xlink:label="loc_aal_EmergingMarket10312InvestmentTrustMember_834C201721685DFAA305B57227257C60" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_EmergingMarket10312InvestmentTrustMember_834C201721685DFAA305B57227257C60" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CanadianSegregatedBalancedValueMember" xlink:label="loc_aal_CanadianSegregatedBalancedValueMember_0E442C84820D91C73E0AB5722725D8CF" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_CanadianSegregatedBalancedValueMember_0E442C84820D91C73E0AB5722725D8CF" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CommonOrCollectiveTrustMember" xlink:label="loc_aal_CommonOrCollectiveTrustMember_ECFBCDEDB584E3B09058B57227250C4C" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquitySecuritiesInvestmentObjectiveMember_308FA3110FBC274B126FB5722724BC67" xlink:to="loc_aal_CommonOrCollectiveTrustMember_ECFBCDEDB584E3B09058B57227250C4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_92CEB51EC816EEFDFADEB5722725D68F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:to="loc_us-gaap_RangeAxis_92CEB51EC816EEFDFADEB5722725D68F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_92CEB51EC816EEFDFADEB5722725D68F" xlink:to="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_92CEB51EC816EEFDFADEB5722725D68F" xlink:to="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_AC7F07F578DD09F453A7B5722725752E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A" xlink:to="loc_us-gaap_MinimumMember_AC7F07F578DD09F453A7B5722725752E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_B9982E6CE191B3BBD00AB5722725A554" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_FEA3E893120E59EEEA1FB5722725356A" xlink:to="loc_us-gaap_MaximumMember_B9982E6CE191B3BBD00AB5722725A554" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_EF267B8E2B2038EC6EBBB5722725FEA2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_EF267B8E2B2038EC6EBBB5722725FEA2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CDB31ED8B4C9A10A6405B57227252117_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EF267B8E2B2038EC6EBBB5722725FEA2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CDB31ED8B4C9A10A6405B57227252117_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CDB31ED8B4C9A10A6405B57227252117" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EF267B8E2B2038EC6EBBB5722725FEA2" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CDB31ED8B4C9A10A6405B57227252117" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_33BBE7F11282FC750E20B57227257646" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_CDB31ED8B4C9A10A6405B57227252117" xlink:to="loc_us-gaap_SubsidiariesMember_33BBE7F11282FC750E20B57227257646" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementGeographicalAxis" xlink:label="loc_us-gaap_StatementGeographicalAxis_651A28C7C1C17BA84D54B57227260A40" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_622234ACC25DF04121AFB57227238FD4" xlink:to="loc_us-gaap_StatementGeographicalAxis_651A28C7C1C17BA84D54B57227260A40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementGeographicalAxis_651A28C7C1C17BA84D54B57227260A40" xlink:to="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentGeographicalDomain" xlink:label="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementGeographicalAxis_651A28C7C1C17BA84D54B57227260A40" xlink:to="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_GB" xlink:label="loc_country_GB_D987EA5D95C3F9D4BF51B5722726C99B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_country_GB_D987EA5D95C3F9D4BF51B5722726C99B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_JP" xlink:label="loc_country_JP_DBAD0A93CC9A166F4778B57227268413" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_country_JP_DBAD0A93CC9A166F4778B57227268413" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_FR" xlink:label="loc_country_FR_5D70A38BE9B48C3BAF9EB5722726F896" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_country_FR_5D70A38BE9B48C3BAF9EB5722726F896" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_CH" xlink:label="loc_country_CH_8D18D196564857FACA48B57227269591" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_country_CH_8D18D196564857FACA48B57227269591" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_NL" xlink:label="loc_country_NL_A6795F6B8BA096B9D66BB57227261440" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_country_NL_A6795F6B8BA096B9D66BB57227261440" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmergingMarketsMember" xlink:label="loc_aal_EmergingMarketsMember_E3B746FD904427B79567B572272617A1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_aal_EmergingMarketsMember_E3B746FD904427B79567B572272617A1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NoConcentrationGreaterThanFivePercentInAnyOneCountryMember" xlink:label="loc_aal_NoConcentrationGreaterThanFivePercentInAnyOneCountryMember_259DD3681A51F9D32C85B5722726BE22" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentGeographicalDomain_3CD0DBD97C7B04984B71B57227263EF6" xlink:to="loc_aal_NoConcentrationGreaterThanFivePercentInAnyOneCountryMember_259DD3681A51F9D32C85B5722726BE22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations" xlink:label="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_E062E4C079F8F84A0F41B5722726EACB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_EDBAB9A72FE9F0F58D65B5722726C53C" xlink:to="loc_us-gaap_DefinedBenefitPlanWeightedAverageAssetAllocations_E062E4C079F8F84A0F41B5722726EACB" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EstimatedLifeOfLiquidationOfUnderlyingAssets" xlink:label="loc_aal_EstimatedLifeOfLiquidationOfUnderlyingAssets_672A03EB5613B20955CBB57227262256" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_EDBAB9A72FE9F0F58D65B5722726C53C" xlink:to="loc_aal_EstimatedLifeOfLiquidationOfUnderlyingAssets_672A03EB5613B20955CBB57227262256" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DefinedBenefitPlanMasterTrustFutureFundingCommitments" xlink:label="loc_aal_DefinedBenefitPlanMasterTrustFutureFundingCommitments_D3F4A486267110E8C69CB5722726B363" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_EDBAB9A72FE9F0F58D65B5722726C53C" xlink:to="loc_aal_DefinedBenefitPlanMasterTrustFutureFundingCommitments_D3F4A486267110E8C69CB5722726B363" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansScheduleOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7A58EA022C1182A76F33B57227413CFF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7A58EA022C1182A76F33B57227413CFF" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F02FF58B48C544941D28B5722741A05E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_7A58EA022C1182A76F33B57227413CFF" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F02FF58B48C544941D28B5722741A05E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B5AE4928A461DBB71CE6B5722741D770_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F02FF58B48C544941D28B5722741A05E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B5AE4928A461DBB71CE6B5722741D770_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B5AE4928A461DBB71CE6B5722741D770" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F02FF58B48C544941D28B5722741A05E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B5AE4928A461DBB71CE6B5722741D770" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_3F386FDFC9E5808FCBD1B57227410BC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B5AE4928A461DBB71CE6B5722741D770" xlink:to="loc_us-gaap_SubsidiariesMember_3F386FDFC9E5808FCBD1B57227410BC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_7283633BEB349857E5F3B57227413A5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents_7283633BEB349857E5F3B57227413A5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_01C369E614EC396E3B06B5722741E9AC" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation_01C369E614EC396E3B06B5722741E9AC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_A0854D3DF876A62F9E58B57227414FE1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1_A0854D3DF876A62F9E58B57227414FE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1" xlink:label="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_1CBB52AB58F3B7A96697B57227413872" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_E75545DC9B6B92EABB0AB572274186A1" xlink:to="loc_us-gaap_DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1_1CBB52AB58F3B7A96697B57227413872" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/EmployeeBenefitPlansTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_97CB3A14F043CE6A3F1AB572276F49EE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_97CB3A14F043CE6A3F1AB572276F49EE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E0A019F8B80EDB1000A8B572276F8920" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_97CB3A14F043CE6A3F1AB572276F49EE" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E0A019F8B80EDB1000A8B572276F8920" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B4D9D7272FF9DCB0F8EAB572276F577F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E0A019F8B80EDB1000A8B572276F8920" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B4D9D7272FF9DCB0F8EAB572276F577F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B4D9D7272FF9DCB0F8EAB572276F577F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E0A019F8B80EDB1000A8B572276F8920" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B4D9D7272FF9DCB0F8EAB572276F577F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_DAC8BBB404D15D6B36CEB572276F8B35" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B4D9D7272FF9DCB0F8EAB572276F577F" xlink:to="loc_us-gaap_SubsidiariesMember_DAC8BBB404D15D6B36CEB572276F8B35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeAxis" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_3F7E8108FABFA0954455B572276F5364" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_97CB3A14F043CE6A3F1AB572276F49EE" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_3F7E8108FABFA0954455B572276F5364" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_3F7E8108FABFA0954455B572276F5364" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetirementPlanTypeDomain" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_3F7E8108FABFA0954455B572276F5364" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PensionPlansDefinedBenefitMember" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_0E9441A04A782C1088FAB572276F36F9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_0E9441A04A782C1088FAB572276F36F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember" xlink:label="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_C8AD470FFAE1798FAAC1B572276FF49B" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_D3F3514AA16BF44281F5B572276F238B" xlink:to="loc_us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember_C8AD470FFAE1798FAAC1B572276FF49B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfChangesInProjectedBenefitObligationsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfChangesInProjectedBenefitObligationsTableTextBlock_F9DFFEE10E3F166CD928B5722770C50C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfChangesInProjectedBenefitObligationsTableTextBlock_F9DFFEE10E3F166CD928B5722770C50C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfChangesInFairValueOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfChangesInFairValueOfPlanAssetsTableTextBlock_A42FDF65F897695BFC05B5722770384C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfChangesInFairValueOfPlanAssetsTableTextBlock_A42FDF65F897695BFC05B5722770384C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_5AD7EE7B0DE2A436F62CB5722770D44D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock_5AD7EE7B0DE2A436F62CB5722770D44D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_32E51659EDBB5BBC0DB5B5722770FFB4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock_32E51659EDBB5BBC0DB5B5722770FFB4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_1D7AB1271B150F1B4AA6B5722770873B" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfAccumulatedBenefitObligationsInExcessOfFairValueOfPlanAssetsTableTextBlock_1D7AB1271B150F1B4AA6B5722770873B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfNetBenefitCostsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_9567147AD79E2C1DEE60B572277030B8" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfNetBenefitCostsTableTextBlock_9567147AD79E2C1DEE60B572277030B8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAssumptionsUsedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_B1869D7C0020B217C0EEB5722770DBEB" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfAssumptionsUsedTableTextBlock_B1869D7C0020B217C0EEB5722770DBEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock_5E58D7582CFF8E41B80AB57227706149" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock_5E58D7582CFF8E41B80AB57227706149" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_148EB64BC5B361210EFDB5722770EB05" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock_148EB64BC5B361210EFDB5722770EB05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_46270EB86443A74ED7B6B5722770C9DA" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock_46270EB86443A74ED7B6B5722770C9DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_52CA0F22E031BF813FEBB5722770880E" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_859A93EFB0A209FDEBCAB572276F58EE" xlink:to="loc_us-gaap_ScheduleOfEffectOfSignificantUnobservableInputsChangesInPlanAssetsTableTextBlock_52CA0F22E031BF813FEBB5722770880E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestments" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F2E872E27CCDCEE521FCB572278A8031" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_D65EFC716D285A2BC98AB572278A62C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F2E872E27CCDCEE521FCB572278A8031" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_D65EFC716D285A2BC98AB572278A62C8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_3B52B6B1D6BCA1B57AC7B572278ACC1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_D65EFC716D285A2BC98AB572278A62C8" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_3B52B6B1D6BCA1B57AC7B572278ACC1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1DE414BB44CE6329EB4AB572278A8CDF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3B52B6B1D6BCA1B57AC7B572278ACC1A" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1DE414BB44CE6329EB4AB572278A8CDF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1DE414BB44CE6329EB4AB572278A8CDF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3B52B6B1D6BCA1B57AC7B572278ACC1A" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1DE414BB44CE6329EB4AB572278A8CDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_E4D308F998282C7AFCA4B572278AB39E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_1DE414BB44CE6329EB4AB572278A8CDF" xlink:to="loc_us-gaap_SubsidiariesMember_E4D308F998282C7AFCA4B572278AB39E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_F5C7309B2E03E8BD9E73B572278A8FE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_F2E872E27CCDCEE521FCB572278A8031" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_F5C7309B2E03E8BD9E73B572278A8FE5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsOtherInvestmentsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentLineItems" xlink:label="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd#invest_InvestmentTable" xlink:label="loc_invest_InvestmentTable_3221D376DEB668E79159B57227773A06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_invest_InvestmentTable_3221D376DEB668E79159B57227773A06" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_DA94A38F3DC26ECA6AEEB572277730D1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_3221D376DEB668E79159B57227773A06" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_DA94A38F3DC26ECA6AEEB572277730D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4FE65EBD835B24FD2E59B5722777FDD8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_DA94A38F3DC26ECA6AEEB572277730D1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4FE65EBD835B24FD2E59B5722777FDD8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_4FE65EBD835B24FD2E59B5722777FDD8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_DA94A38F3DC26ECA6AEEB572277730D1" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_4FE65EBD835B24FD2E59B5722777FDD8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_F9F41BE90ACA7BEC3A79B5722778FD43" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_4FE65EBD835B24FD2E59B5722777FDD8" xlink:to="loc_us-gaap_SubsidiariesMember_F9F41BE90ACA7BEC3A79B5722778FD43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3B3D37757837D742753B572277848C5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_3221D376DEB668E79159B57227773A06" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3B3D37757837D742753B572277848C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3B3D37757837D742753B572277848C5" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvesteeNameDomain" xlink:label="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_B3B3D37757837D742753B572277848C5" xlink:to="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RepublicAirwaysHoldingsInc.Member" xlink:label="loc_aal_RepublicAirwaysHoldingsInc.Member_1A3FDBEBC45A2B0AAD4CB5722778A83A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949" xlink:to="loc_aal_RepublicAirwaysHoldingsInc.Member_1A3FDBEBC45A2B0AAD4CB5722778A83A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ChinaSouthernAirlinesCompanyLimitedMember" xlink:label="loc_aal_ChinaSouthernAirlinesCompanyLimitedMember_F21A4C12ED3880B88D8DB5722778714F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityMethodInvesteeNameDomain_9174DD16B8B7A0665E8CB57227783949" xlink:to="loc_aal_ChinaSouthernAirlinesCompanyLimitedMember_F21A4C12ED3880B88D8DB5722778714F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_99D3A7A2A463A6A2C4C2B57227781E3A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_invest_InvestmentTable_3221D376DEB668E79159B57227773A06" xlink:to="loc_us-gaap_ProductOrServiceAxis_99D3A7A2A463A6A2C4C2B57227781E3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_BCAB7C52C66F18291009B5722778C4C5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_99D3A7A2A463A6A2C4C2B57227781E3A" xlink:to="loc_us-gaap_ProductsAndServicesDomain_BCAB7C52C66F18291009B5722778C4C5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_BCAB7C52C66F18291009B5722778C4C5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_99D3A7A2A463A6A2C4C2B57227781E3A" xlink:to="loc_us-gaap_ProductsAndServicesDomain_BCAB7C52C66F18291009B5722778C4C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegionalCarrierMember" xlink:label="loc_us-gaap_RegionalCarrierMember_CA89E000B6CF6C5852A5B57227787CD3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_BCAB7C52C66F18291009B5722778C4C5" xlink:to="loc_us-gaap_RegionalCarrierMember_CA89E000B6CF6C5852A5B57227787CD3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_D089B14202AF4D26BE63B5722778F95A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_D089B14202AF4D26BE63B5722778F95A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineCapacityPurchaseArrangements" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangements_F9EFC311F1B2D0CB0687B57227786D0C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangements_F9EFC311F1B2D0CB0687B57227786D0C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CostMethodInvestmentsOwnershipPercentage" xlink:label="loc_aal_CostMethodInvestmentsOwnershipPercentage_E3DBBBB4C48C7AEE516DB5722778D0A5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_aal_CostMethodInvestmentsOwnershipPercentage_E3DBBBB4C48C7AEE516DB5722778D0A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostMethodInvestments" xlink:label="loc_us-gaap_CostMethodInvestments_BB65604868A3C1432FD0B5722778478C" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_us-gaap_CostMethodInvestments_BB65604868A3C1432FD0B5722778478C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_CostMethodInvestmentsRequiredHoldingPeriod" xlink:label="loc_aal_CostMethodInvestmentsRequiredHoldingPeriod_C489ECB936074173A460B5722778BCC8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_invest_InvestmentLineItems_EBDD675C781AC5E14B66B5722778814B" xlink:to="loc_aal_CostMethodInvestmentsRequiredHoldingPeriod_C489ECB936074173A460B5722778BCC8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsScheduleOfCarryingValueAndEstimatedFairValueOfLongTermDebtIncludingCurrentMaturitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3CF79ECD0FBAFE477865B572277D21DA" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3B97A2D759447D7E7EEBB572277CE822" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3CF79ECD0FBAFE477865B572277D21DA" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3B97A2D759447D7E7EEBB572277CE822" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_EA2425E0548AC7EAB4E7B572277C38F4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3B97A2D759447D7E7EEBB572277CE822" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_EA2425E0548AC7EAB4E7B572277C38F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_AF01F22BC84DB0BD4E87B572277CDCF5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EA2425E0548AC7EAB4E7B572277C38F4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_AF01F22BC84DB0BD4E87B572277CDCF5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_AF01F22BC84DB0BD4E87B572277CDCF5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EA2425E0548AC7EAB4E7B572277C38F4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_AF01F22BC84DB0BD4E87B572277CDCF5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_FE1458B1189964BCE280B572277C37FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_AF01F22BC84DB0BD4E87B572277CDCF5" xlink:to="loc_us-gaap_SubsidiariesMember_FE1458B1189964BCE280B572277C37FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_7035D3AE45C8B9132634B572277C66DA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3B97A2D759447D7E7EEBB572277CE822" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_7035D3AE45C8B9132634B572277C66DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_7035D3AE45C8B9132634B572277C66DA" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_B60A1839CF92850BDBBFB572277CF594" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_7035D3AE45C8B9132634B572277C66DA" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_B60A1839CF92850BDBBFB572277CF594" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_B60A1839CF92850BDBBFB572277CF594" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_60E735CB92B4C0D196A8B572277CEDD6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_60E735CB92B4C0D196A8B572277CEDD6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_D854B2AB15468DB17B8FB572277CED6E" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_BFB257B673C9B3CB9D91B572277CFF00" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_D854B2AB15468DB17B8FB572277CED6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_700C473BE0AD206B2488B572277DA871" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_3B97A2D759447D7E7EEBB572277CE822" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_700C473BE0AD206B2488B572277DA871" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9CFDD78B7D1182BDD31BB572277D32CC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_700C473BE0AD206B2488B572277DA871" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9CFDD78B7D1182BDD31BB572277D32CC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9CFDD78B7D1182BDD31BB572277D32CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_700C473BE0AD206B2488B572277DA871" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9CFDD78B7D1182BDD31BB572277D32CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_F2FDC4937A3FA6B1B4C1B572277DB5C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9CFDD78B7D1182BDD31BB572277D32CC" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_F2FDC4937A3FA6B1B4C1B572277DB5C4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongTermDebtFairValue" xlink:label="loc_us-gaap_LongTermDebtFairValue_6C2773EB1D9E6D7FBEFBB572277DF702" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_3CF79ECD0FBAFE477865B572277D21DA" xlink:to="loc_us-gaap_LongTermDebtFairValue_6C2773EB1D9E6D7FBEFBB572277DF702" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsSummaryOfAssetsMeasuredAtFairValueOnRecurringBasisDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D5BF0C8CF2D26E570983B572278436C4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D5BF0C8CF2D26E570983B572278436C4" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_1E5A9E26A5E8E88AC284B572278323CE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_1E5A9E26A5E8E88AC284B572278323CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FBA0F815B0A5B0737D57B57227830E8C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1E5A9E26A5E8E88AC284B572278323CE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FBA0F815B0A5B0737D57B57227830E8C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FBA0F815B0A5B0737D57B57227830E8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1E5A9E26A5E8E88AC284B572278323CE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FBA0F815B0A5B0737D57B57227830E8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_4FA02802C79579FCA4D8B57227836228" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_FBA0F815B0A5B0737D57B57227830E8C" xlink:to="loc_us-gaap_SubsidiariesMember_4FA02802C79579FCA4D8B57227836228" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_468BE73C24082B9D84BCB5722783C9A5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_468BE73C24082B9D84BCB5722783C9A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_938852E205777445B9C5B57227839FE1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_468BE73C24082B9D84BCB5722783C9A5" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_938852E205777445B9C5B57227839FE1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_938852E205777445B9C5B57227839FE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_468BE73C24082B9D84BCB5722783C9A5" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_938852E205777445B9C5B57227839FE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_CA9E8AFB57C99E932A09B57227832BC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_938852E205777445B9C5B57227839FE1" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_CA9E8AFB57C99E932A09B57227832BC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_7871EE6AFD0D5C32DCCEB57227838CC8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:to="loc_us-gaap_InvestmentTypeAxis_7871EE6AFD0D5C32DCCEB57227838CC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_7871EE6AFD0D5C32DCCEB57227838CC8" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_7871EE6AFD0D5C32DCCEB57227838CC8" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_9842FAFB4FAC00ABEB94B57227836055" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:to="loc_us-gaap_MoneyMarketFundsMember_9842FAFB4FAC00ABEB94B57227836055" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CorporateDebtSecuritiesMember" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_A19A13DECD471EDE065AB5722783F6AA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_A19A13DECD471EDE065AB5722783F6AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BankTimeDepositsMember" xlink:label="loc_us-gaap_BankTimeDepositsMember_1C31C6331EBD0BAE3E5AB572278317E2" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:to="loc_us-gaap_BankTimeDepositsMember_1C31C6331EBD0BAE3E5AB572278317E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RepurchaseAgreementsMember" xlink:label="loc_us-gaap_RepurchaseAgreementsMember_18418C0A8B88F1EA2C7FB57227836211" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_C5F97B6CE3B743C87FCAB5722783C3D5" xlink:to="loc_us-gaap_RepurchaseAgreementsMember_18418C0A8B88F1EA2C7FB57227836211" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_076877AE9B49DBD034CBB572278379FF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_076877AE9B49DBD034CBB572278379FF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_076877AE9B49DBD034CBB572278379FF" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_076877AE9B49DBD034CBB572278379FF" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_CC169351B434F578B6F5B5722784CBE1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_CC169351B434F578B6F5B5722784CBE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_45C253A84F7EB9945A83B5722784E062" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_610B6069A2E52610575AB57227830288" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_45C253A84F7EB9945A83B5722784E062" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentSecondaryCategorizationAxis" xlink:label="loc_us-gaap_InvestmentSecondaryCategorizationAxis_B315BA13E8964E4F7C0DB5722784F8AF" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_0ACF2D915714D413A2FBB5722782E884" xlink:to="loc_us-gaap_InvestmentSecondaryCategorizationAxis_B315BA13E8964E4F7C0DB5722784F8AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsBySecondaryCategorizationDomain" xlink:label="loc_us-gaap_InvestmentsBySecondaryCategorizationDomain_CB75F1D0ED353CCDA86BB5722784A5A1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentSecondaryCategorizationAxis_B315BA13E8964E4F7C0DB5722784F8AF" xlink:to="loc_us-gaap_InvestmentsBySecondaryCategorizationDomain_CB75F1D0ED353CCDA86BB5722784A5A1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InvestmentsBySecondaryCategorizationDomain" xlink:label="loc_us-gaap_InvestmentsBySecondaryCategorizationDomain_CB75F1D0ED353CCDA86BB5722784A5A1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentSecondaryCategorizationAxis_B315BA13E8964E4F7C0DB5722784F8AF" xlink:to="loc_us-gaap_InvestmentsBySecondaryCategorizationDomain_CB75F1D0ED353CCDA86BB5722784A5A1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MaturityDatesExceedingOneYearMember" xlink:label="loc_aal_MaturityDatesExceedingOneYearMember_9183D65F5047BEE1324CB57227840BB0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsBySecondaryCategorizationDomain_CB75F1D0ED353CCDA86BB5722784A5A1" xlink:to="loc_aal_MaturityDatesExceedingOneYearMember_9183D65F5047BEE1324CB57227840BB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_6A3B6B228C236CDCA8B0B5722784CB29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D5BF0C8CF2D26E570983B572278436C4" xlink:to="loc_us-gaap_AvailableForSaleSecurities_6A3B6B228C236CDCA8B0B5722784CB29" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure" xlink:label="loc_aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure_9B86DD3056E271242683B5722784793F" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D5BF0C8CF2D26E570983B572278436C4" xlink:to="loc_aal_RestrictedCashAndCashEquivalentsAndShorttermInvestmentsFairValueDisclosure_9B86DD3056E271242683B5722784793F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_10E8EBAAF5E708692B90B57227847F5B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_D5BF0C8CF2D26E570983B572278436C4" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_10E8EBAAF5E708692B90B57227847F5B" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/FairValueMeasurementsAndOtherInvestmentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A78731B8587553100C03B5722787ED3B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BA9FAC59EDD4BE5FB1E7B57227877AA3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A78731B8587553100C03B5722787ED3B" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BA9FAC59EDD4BE5FB1E7B57227877AA3" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_8BECE08BCF846A667E94B57227870326" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_BA9FAC59EDD4BE5FB1E7B57227877AA3" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_8BECE08BCF846A667E94B57227870326" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6906222C49D572AA6FFFB57227873CEF_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8BECE08BCF846A667E94B57227870326" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6906222C49D572AA6FFFB57227873CEF_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_6906222C49D572AA6FFFB57227873CEF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8BECE08BCF846A667E94B57227870326" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_6906222C49D572AA6FFFB57227873CEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_826548212C93BB66D0EFB57227872824" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_6906222C49D572AA6FFFB57227873CEF" xlink:to="loc_us-gaap_SubsidiariesMember_826548212C93BB66D0EFB57227872824" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_9C041B975ED0B03C7C2BB57227877E31" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A78731B8587553100C03B5722787ED3B" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_9C041B975ED0B03C7C2BB57227877E31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_54CBD0E6823326BA2D99B57227877452" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_A78731B8587553100C03B5722787ED3B" xlink:to="loc_us-gaap_ScheduleOfCarryingValuesAndEstimatedFairValuesOfDebtInstrumentsTableTextBlock_54CBD0E6823326BA2D99B57227877452" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesLineItems" xlink:label="loc_aal_IncomeTaxesLineItems_4A961680A4FA2A30E788B57227AD6D27" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesTable" xlink:label="loc_aal_IncomeTaxesTable_FF06153F74B4B08BFB4EB57227ADC329" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_4A961680A4FA2A30E788B57227AD6D27" xlink:to="loc_aal_IncomeTaxesTable_FF06153F74B4B08BFB4EB57227ADC329" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_6B3D7A24A6B7587F7385B57227AD91CD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_FF06153F74B4B08BFB4EB57227ADC329" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_6B3D7A24A6B7587F7385B57227AD91CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1CB112A319BD216B2036B57227ADFA73_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_6B3D7A24A6B7587F7385B57227AD91CD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1CB112A319BD216B2036B57227ADFA73_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1CB112A319BD216B2036B57227ADFA73" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_6B3D7A24A6B7587F7385B57227AD91CD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1CB112A319BD216B2036B57227ADFA73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_50E69B34CF443D78EA88B57227ADFFBB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_1CB112A319BD216B2036B57227ADFA73" xlink:to="loc_us-gaap_SubsidiariesMember_50E69B34CF443D78EA88B57227ADFFBB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_B974B43964C98F2E68D1B57227ADAE29" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_4A961680A4FA2A30E788B57227AD6D27" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_B974B43964C98F2E68D1B57227ADAE29" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesAdditionalDisclosuresDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesLineItems" xlink:label="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesTable" xlink:label="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_EA819D83E7E6F9B8A607B572279C70D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_EA819D83E7E6F9B8A607B572279C70D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_62C1107750B0C03304CAB572279C7EE4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EA819D83E7E6F9B8A607B572279C70D4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_62C1107750B0C03304CAB572279C7EE4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_62C1107750B0C03304CAB572279C7EE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EA819D83E7E6F9B8A607B572279C70D4" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_62C1107750B0C03304CAB572279C7EE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_BF3DC49B3A0EBD8E3D7AB572279D6926" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_62C1107750B0C03304CAB572279C7EE4" xlink:to="loc_us-gaap_SubsidiariesMember_BF3DC49B3A0EBD8E3D7AB572279D6926" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_686A11E36614BB6232BAB572279DF6BA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_686A11E36614BB6232BAB572279DF6BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_79FEE66CEEABAECB9254B572279D8A3B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_686A11E36614BB6232BAB572279DF6BA" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_79FEE66CEEABAECB9254B572279D8A3B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetDomain" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_79FEE66CEEABAECB9254B572279D8A3B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_686A11E36614BB6232BAB572279DF6BA" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_79FEE66CEEABAECB9254B572279D8A3B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SubstantiallyAllDeferredTaxAssetsIncludingNetOperatingLossesMember" xlink:label="loc_aal_SubstantiallyAllDeferredTaxAssetsIncludingNetOperatingLossesMember_7F167C2061E0C434B98BB572279D9115" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_79FEE66CEEABAECB9254B572279D8A3B" xlink:to="loc_aal_SubstantiallyAllDeferredTaxAssetsIncludingNetOperatingLossesMember_7F167C2061E0C434B98BB572279D9115" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityAxis" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_627E73DE3EFD929131C0B572279DF020" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_627E73DE3EFD929131C0B572279DF020" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_627E73DE3EFD929131C0B572279DF020" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxAuthorityDomain" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_627E73DE3EFD929131C0B572279DF020" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticCountryMember" xlink:label="loc_us-gaap_DomesticCountryMember_39006BC2EB16C2F09790B572279DE662" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB" xlink:to="loc_us-gaap_DomesticCountryMember_39006BC2EB16C2F09790B572279DE662" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StateAndLocalJurisdictionMember" xlink:label="loc_us-gaap_StateAndLocalJurisdictionMember_7F1172D41A65D886F853B572279DE8B1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_A3AB86ADF3EFFBA2C51AB572279DF1EB" xlink:to="loc_us-gaap_StateAndLocalJurisdictionMember_7F1172D41A65D886F853B572279DE8B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardAxis" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_687AF98770A32A66D38CB572279D06E2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_6B8D97F30ED38956C888B572279C8EB9" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_687AF98770A32A66D38CB572279D06E2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_46C433DDF8B8C441986EB572279D17E3_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_687AF98770A32A66D38CB572279D06E2" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_46C433DDF8B8C441986EB572279D17E3_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardNameDomain" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_46C433DDF8B8C441986EB572279D17E3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_687AF98770A32A66D38CB572279D06E2" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_46C433DDF8B8C441986EB572279D17E3" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AlternativeMinimumTaxCreditCarryforwardMember" xlink:label="loc_aal_AlternativeMinimumTaxCreditCarryforwardMember_B941F5607D1F807FFBF1B572279DF32E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_46C433DDF8B8C441986EB572279D17E3" xlink:to="loc_aal_AlternativeMinimumTaxCreditCarryforwardMember_B941F5607D1F807FFBF1B572279DF32E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_724058EE1DFA795D359AB572279E8969" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_724058EE1DFA795D359AB572279E8969" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ValuationAllowanceTaxCutsAndJobsActOf2017DeferredTaxAssetIncreaseDecreaseAmount" xlink:label="loc_aal_ValuationAllowanceTaxCutsAndJobsActOf2017DeferredTaxAssetIncreaseDecreaseAmount_69188F749C4E71730427B572279E6833" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_ValuationAllowanceTaxCutsAndJobsActOf2017DeferredTaxAssetIncreaseDecreaseAmount_69188F749C4E71730427B572279E6833" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwards" xlink:label="loc_us-gaap_OperatingLossCarryforwards_842FD32498C73E1007E4B572279EE8F8" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_us-gaap_OperatingLossCarryforwards_842FD32498C73E1007E4B572279EE8F8" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OperatingLossCarryforwardsWithoutAnnualLimitationsOnUse" xlink:label="loc_aal_OperatingLossCarryforwardsWithoutAnnualLimitationsOnUse_AC73B9C9B41C93DB8231B572279E1090" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_OperatingLossCarryforwardsWithoutAnnualLimitationsOnUse_AC73B9C9B41C93DB8231B572279E1090" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OperatingLossCarryforwardsOutstandingWithoutAnnualLimitationsOnUse" xlink:label="loc_aal_OperatingLossCarryforwardsOutstandingWithoutAnnualLimitationsOnUse_44819E002FB7DE7479A8B572279E04A8" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_OperatingLossCarryforwardsOutstandingWithoutAnnualLimitationsOnUse_44819E002FB7DE7479A8B572279E04A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TaxCreditCarryforwardAmount" xlink:label="loc_us-gaap_TaxCreditCarryforwardAmount_EA8CC3C07264B63CADB2B572279E4FAF" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_us-gaap_TaxCreditCarryforwardAmount_EA8CC3C07264B63CADB2B572279E4FAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_E75869DBB67F2D24847AB572279E6BFF" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_E75869DBB67F2D24847AB572279E6BFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_34FEC08ACF53F81D120DB572279E035B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_34FEC08ACF53F81D120DB572279E035B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit" xlink:label="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_6BF609F3BDE4AF06616AB572279E9260" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_6BF609F3BDE4AF06616AB572279E9260" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount" xlink:label="loc_aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount_1B1C64FFABC08DE1BB89B572279E90F5" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_7D975870C854A0611D13B572279D8DC0" xlink:to="loc_aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount_1B1C64FFABC08DE1BB89B572279E90F5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesComponentsOfIncomeTaxProvisionBenefitDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_ComponentsOfIncomeTaxesLineItems" xlink:label="loc_aal_ComponentsOfIncomeTaxesLineItems_F0F3534FA1E2610B0382B57227A79832" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ComponentsOfIncomeTaxesTable" xlink:label="loc_aal_ComponentsOfIncomeTaxesTable_64366965C836137F0674B57227A68959" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_F0F3534FA1E2610B0382B57227A79832" xlink:to="loc_aal_ComponentsOfIncomeTaxesTable_64366965C836137F0674B57227A68959" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E5EE28ED0333EB38D2B3B57227A7099F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_ComponentsOfIncomeTaxesTable_64366965C836137F0674B57227A68959" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E5EE28ED0333EB38D2B3B57227A7099F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7AE3D421EBA4E39707C7B57227A7BA24_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5EE28ED0333EB38D2B3B57227A7099F" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7AE3D421EBA4E39707C7B57227A7BA24_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_7AE3D421EBA4E39707C7B57227A7BA24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5EE28ED0333EB38D2B3B57227A7099F" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_7AE3D421EBA4E39707C7B57227A7BA24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_959245B76EE6981893A1B57227A7AC27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_7AE3D421EBA4E39707C7B57227A7BA24" xlink:to="loc_us-gaap_SubsidiariesMember_959245B76EE6981893A1B57227A7AC27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CB5072043B3EF887B009B57227A70014" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_F0F3534FA1E2610B0382B57227A79832" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CB5072043B3EF887B009B57227A70014" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_263C16E0DBDA6E051649B57227A7F4BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CB5072043B3EF887B009B57227A70014" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_263C16E0DBDA6E051649B57227A7F4BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3F40DF98FCF9A428B6B5B57227A7E241" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CB5072043B3EF887B009B57227A70014" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_3F40DF98FCF9A428B6B5B57227A7E241" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0EA4BF6B90F41EBA07A1B57227A71E74" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefitContinuingOperationsAbstract_CB5072043B3EF887B009B57227A70014" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_0EA4BF6B90F41EBA07A1B57227A71E74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_CF1A066AA75B7C1FC5E0B57227A789B0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_F0F3534FA1E2610B0382B57227A79832" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_CF1A066AA75B7C1FC5E0B57227A789B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_B1326E012BC4C0EA7D73B57227A7B306" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_CF1A066AA75B7C1FC5E0B57227A789B0" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_B1326E012BC4C0EA7D73B57227A7B306" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_5F1011E0DD34C417FCEAB57227A72678" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_CF1A066AA75B7C1FC5E0B57227A789B0" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_5F1011E0DD34C417FCEAB57227A72678" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_00001C76117064E81A3DB57227A7A90F" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefitContinuingOperationsAbstract_CF1A066AA75B7C1FC5E0B57227A789B0" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_00001C76117064E81A3DB57227A7A90F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7C3AC2E628CE45616D58B57227A737D5" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_ComponentsOfIncomeTaxesLineItems_F0F3534FA1E2610B0382B57227A79832" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7C3AC2E628CE45616D58B57227A737D5" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesComputationOfIncomeTaxProvisionBenefitDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxDisclosureLineItems" xlink:label="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ComponentsOfIncomeTaxesTable" xlink:label="loc_aal_ComponentsOfIncomeTaxesTable_B40A145EA3AE90C18428B57227A2FE06" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_aal_ComponentsOfIncomeTaxesTable_B40A145EA3AE90C18428B57227A2FE06" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_8F6C4281879D624CEFB1B57227A25A91" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_ComponentsOfIncomeTaxesTable_B40A145EA3AE90C18428B57227A2FE06" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_8F6C4281879D624CEFB1B57227A25A91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_85A3E33ED0725297E18CB57227A268CE_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8F6C4281879D624CEFB1B57227A25A91" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_85A3E33ED0725297E18CB57227A268CE_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_85A3E33ED0725297E18CB57227A268CE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8F6C4281879D624CEFB1B57227A25A91" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_85A3E33ED0725297E18CB57227A268CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_C79AD44D54247868A799B57227A26182" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_85A3E33ED0725297E18CB57227A268CE" xlink:to="loc_us-gaap_SubsidiariesMember_C79AD44D54247868A799B57227A26182" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_DFA9D7887BAA21E9A24BB57227A23EE7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_DFA9D7887BAA21E9A24BB57227A23EE7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_B6AB3DD71F9BB2B8B061B57227A2BBFD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_B6AB3DD71F9BB2B8B061B57227A2BBFD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_4405B3EA46E7C546BC3EB57227A287BE" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_4405B3EA46E7C546BC3EB57227A287BE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EffectiveIncomeTaxRateReconciliationBankruptcyAdministrationExpenses" xlink:label="loc_aal_EffectiveIncomeTaxRateReconciliationBankruptcyAdministrationExpenses_B36428971A83AD272B3DB57227A28E7A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_aal_EffectiveIncomeTaxRateReconciliationBankruptcyAdministrationExpenses_B36428971A83AD272B3DB57227A28E7A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount" xlink:label="loc_aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount_A0E5162C5DD820825205B57227A2C3F9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_aal_EffectiveIncomeTaxRateReconciliationEffectofTaxCutsandJobsActof2017Amount_A0E5162C5DD820825205B57227A2C3F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_70BB585DC45D3F61AFCBB57227A27A78" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_70BB585DC45D3F61AFCBB57227A27A78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_736793E13EBF0FFDB9AFB57227A2DC8C" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_736793E13EBF0FFDB9AFB57227A2DC8C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_C5DA03BCDE7882B63E9CB57227A2A4DA" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxDisclosureLineItems_04E8502D30299CDB826CB57227A2AEBD" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_C5DA03BCDE7882B63E9CB57227A2A4DA" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesDeferredTaxAssetsAndLiabilitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsLineItems" xlink:label="loc_us-gaap_OperatingLossCarryforwardsLineItems_3A556E9018001A6C44FDB572279604DF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingLossCarryforwardsTable" xlink:label="loc_us-gaap_OperatingLossCarryforwardsTable_DE02C860DBB535C9943AB57227960034" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_3A556E9018001A6C44FDB572279604DF" xlink:to="loc_us-gaap_OperatingLossCarryforwardsTable_DE02C860DBB535C9943AB57227960034" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_C7C43FA147F6828561F3B57227967373" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OperatingLossCarryforwardsTable_DE02C860DBB535C9943AB57227960034" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_C7C43FA147F6828561F3B57227967373" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A00BAADC2F00D2F0D8D6B57227966BB0_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C7C43FA147F6828561F3B57227967373" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A00BAADC2F00D2F0D8D6B57227966BB0_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A00BAADC2F00D2F0D8D6B57227966BB0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C7C43FA147F6828561F3B57227967373" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A00BAADC2F00D2F0D8D6B57227966BB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_09A91B6ECA2CD72AFC9EB5722796FDC5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_A00BAADC2F00D2F0D8D6B57227966BB0" xlink:to="loc_us-gaap_SubsidiariesMember_09A91B6ECA2CD72AFC9EB5722796FDC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNetAbstract" xlink:label="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_3A556E9018001A6C44FDB572279604DF" xlink:to="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2570B508744106DEE13CB57227962D22" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_2570B508744106DEE13CB57227962D22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_D0E51A7ABA318CBB0396B5722796B3CD" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPensions_D0E51A7ABA318CBB0396B5722796B3CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsFrequentFlierLiability" xlink:label="loc_us-gaap_DeferredTaxAssetsFrequentFlierLiability_84878C428B59F4F83253B57227967FD1" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsFrequentFlierLiability_84878C428B59F4F83253B57227967FD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_D1B06686826D6F7B6C55B5722796E9DF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax_D1B06686826D6F7B6C55B5722796E9DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_EB41E03B8AF67464100AB5722796BCFE" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsPostretirementBenefits_EB41E03B8AF67464100AB5722796BCFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_48DBCC0BC76B17DA525FB57227962705" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsDeferredRent_48DBCC0BC76B17DA525FB57227962705" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsDeferredGainOnSaleLeasebackTransaction" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredGainOnSaleLeasebackTransaction_0B24E68D786C69A0C785B572279664A6" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredGainOnSaleLeasebackTransaction_0B24E68D786C69A0C785B572279664A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_D5C87419438044F0F59DB57227960A2B" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther_D5C87419438044F0F59DB57227960A2B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsOther" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_E996B0ACF3EA1774C705B5722797359F" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_E996B0ACF3EA1774C705B5722797359F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsGross" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_F521FD6BB9FD8DE878C5B5722797E614" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_F521FD6BB9FD8DE878C5B5722797E614" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsValuationAllowance" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_E0AC0ED7F2A4D999ED0FB572279705D6" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_E0AC0ED7F2A4D999ED0FB572279705D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsNet" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_587AEE5F2106710AB680B5722797B7C5" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetsNetAbstract_873BE15FEA6707FF2094B5722796DBE2" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_587AEE5F2106710AB680B5722797B7C5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNetAbstract" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_AAC804CD2F4B8B883C32B57227976882" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_3A556E9018001A6C44FDB572279604DF" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_AAC804CD2F4B8B883C32B57227976882" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization" xlink:label="loc_aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization_66E88C37EA843FE581B8B5722797B27D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_AAC804CD2F4B8B883C32B57227976882" xlink:to="loc_aal_DeferredTaxLiabilitiesAcceleratedDepreciationAndAmortization_66E88C37EA843FE581B8B5722797B27D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesOther" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_C5D0A7319464DB5C9AE0B572279749A1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_AAC804CD2F4B8B883C32B57227976882" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_C5D0A7319464DB5C9AE0B572279749A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilities" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_E2BD4511CDD8B6B949F4B57227970C58" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxLiabilitiesNetAbstract_AAC804CD2F4B8B883C32B57227976882" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_E2BD4511CDD8B6B949F4B57227970C58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_8ADCDD2B6DFBB8FA07CFB57227976474" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OperatingLossCarryforwardsLineItems_3A556E9018001A6C44FDB572279604DF" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_8ADCDD2B6DFBB8FA07CFB57227976474" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/IncomeTaxesTables" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesLineItems" xlink:label="loc_aal_IncomeTaxesLineItems_F0D59D7755B2E1616882B57227AA2357" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesTable" xlink:label="loc_aal_IncomeTaxesTable_04D18D01F56CEAC0A95FB57227AAF6E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_IncomeTaxesLineItems_F0D59D7755B2E1616882B57227AA2357" xlink:to="loc_aal_IncomeTaxesTable_04D18D01F56CEAC0A95FB57227AAF6E5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_43869D3F5B00D4975E08B57227AAB08E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_IncomeTaxesTable_04D18D01F56CEAC0A95FB57227AAF6E5" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_43869D3F5B00D4975E08B57227AAB08E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F95CE695182A7156B022B57227AAA926_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_43869D3F5B00D4975E08B57227AAB08E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F95CE695182A7156B022B57227AAA926_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F95CE695182A7156B022B57227AAA926" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_43869D3F5B00D4975E08B57227AAB08E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F95CE695182A7156B022B57227AAA926" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_18A7D77A0C9B485429F6B57227AADAC8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F95CE695182A7156B022B57227AAA926" xlink:to="loc_us-gaap_SubsidiariesMember_18A7D77A0C9B485429F6B57227AADAC8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FA43CD06B27237F6A3C1B57227AA5204" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_F0D59D7755B2E1616882B57227AA2357" xlink:to="loc_us-gaap_ScheduleOfComponentsOfIncomeTaxExpenseBenefitTableTextBlock_FA43CD06B27237F6A3C1B57227AA5204" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_CEB974C40167ACC8B03FB57227AA3218" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_F0D59D7755B2E1616882B57227AA2357" xlink:to="loc_us-gaap_ScheduleOfEffectiveIncomeTaxRateReconciliationTableTextBlock_CEB974C40167ACC8B03FB57227AA3218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_8881F64F0FD824762942B57227AAAF73" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_IncomeTaxesLineItems_F0D59D7755B2E1616882B57227AA2357" xlink:to="loc_us-gaap_ScheduleOfDeferredTaxAssetsAndLiabilitiesTableTextBlock_8881F64F0FD824762942B57227AAAF73" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosures" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_6B5D155561E87BD4059CB57226C7AF8E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_481A5BB6EBC61E61F19FB57226C79B16" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6B5D155561E87BD4059CB57226C7AF8E" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_481A5BB6EBC61E61F19FB57226C79B16" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_53805F3C84A1459E20B9B57226C732E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_481A5BB6EBC61E61F19FB57226C79B16" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_53805F3C84A1459E20B9B57226C732E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_27A64AD4141EA6210BEFB57226C7204F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_53805F3C84A1459E20B9B57226C732E6" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_27A64AD4141EA6210BEFB57226C7204F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_27A64AD4141EA6210BEFB57226C7204F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_53805F3C84A1459E20B9B57226C732E6" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_27A64AD4141EA6210BEFB57226C7204F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_8AC7A385524518C9F048B57226C75C00" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_27A64AD4141EA6210BEFB57226C7204F" xlink:to="loc_us-gaap_SubsidiariesMember_8AC7A385524518C9F048B57226C75C00" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_23C097EE349A66347E20B57226C7D3F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6B5D155561E87BD4059CB57226C7AF8E" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_23C097EE349A66347E20B57226C7D3F2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_D654246091910F3031ACB57226C23752" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_18DA70133515DE1F8189B57226C19FDE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_D654246091910F3031ACB57226C23752" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_18DA70133515DE1F8189B57226C19FDE" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_D4310D013C0268ED9EF0B57226C107D9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_18DA70133515DE1F8189B57226C19FDE" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_D4310D013C0268ED9EF0B57226C107D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_62E9D56AA07E4B88CF48B57226C1B5D2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_D4310D013C0268ED9EF0B57226C107D9" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_62E9D56AA07E4B88CF48B57226C1B5D2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_62E9D56AA07E4B88CF48B57226C1B5D2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_D4310D013C0268ED9EF0B57226C107D9" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_62E9D56AA07E4B88CF48B57226C1B5D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_146B92B71AEDB28925F7B57226C2A221" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_62E9D56AA07E4B88CF48B57226C1B5D2" xlink:to="loc_us-gaap_SubsidiariesMember_146B92B71AEDB28925F7B57226C2A221" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_0B62A527B2A72AD4B7DFB57226C290E0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_D654246091910F3031ACB57226C23752" xlink:to="loc_us-gaap_NumberOfOperatingSegments_0B62A527B2A72AD4B7DFB57226C290E0" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresOperatingRevenuesByGeographicRegionDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_1A5EFD8A119FBC9D0A11B57226BFCBAF" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7620E6038F70196ACA57B57226BE2879" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1A5EFD8A119FBC9D0A11B57226BFCBAF" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7620E6038F70196ACA57B57226BE2879" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_1E9D54772974706472AEB57226BEC117" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7620E6038F70196ACA57B57226BE2879" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_1E9D54772974706472AEB57226BEC117" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_66F296FBF2335E3C3BEDB57226BED175_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1E9D54772974706472AEB57226BEC117" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_66F296FBF2335E3C3BEDB57226BED175_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_66F296FBF2335E3C3BEDB57226BED175" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1E9D54772974706472AEB57226BEC117" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_66F296FBF2335E3C3BEDB57226BED175" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_0415A7D43065A3BB4BA0B57226BEE7AF" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_66F296FBF2335E3C3BEDB57226BED175" xlink:to="loc_us-gaap_SubsidiariesMember_0415A7D43065A3BB4BA0B57226BEE7AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineDestinationsAxis" xlink:label="loc_us-gaap_AirlineDestinationsAxis_D5DF4365B8DFCFF65729B57226BE1C40" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_7620E6038F70196ACA57B57226BE2879" xlink:to="loc_us-gaap_AirlineDestinationsAxis_D5DF4365B8DFCFF65729B57226BE1C40" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineDestinationDomain" xlink:label="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AirlineDestinationsAxis_D5DF4365B8DFCFF65729B57226BE1C40" xlink:to="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineDestinationDomain" xlink:label="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AirlineDestinationsAxis_D5DF4365B8DFCFF65729B57226BE1C40" xlink:to="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DomesticDestinationMember" xlink:label="loc_us-gaap_DomesticDestinationMember_2A7834AECF81569E15F6B57226BF0FE4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:to="loc_us-gaap_DomesticDestinationMember_2A7834AECF81569E15F6B57226BF0FE4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LatinAmericaDestinationMember" xlink:label="loc_us-gaap_LatinAmericaDestinationMember_A756BC3E3F053DF033EEB57226BF170C" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:to="loc_us-gaap_LatinAmericaDestinationMember_A756BC3E3F053DF033EEB57226BF170C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AtlanticDestinationMember" xlink:label="loc_us-gaap_AtlanticDestinationMember_12BD2F83E85B7A10F8F2B57226BFF565" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:to="loc_us-gaap_AtlanticDestinationMember_12BD2F83E85B7A10F8F2B57226BFF565" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PacificDestinationMember" xlink:label="loc_us-gaap_PacificDestinationMember_1782D3C5A0DE0A605C51B57226BF4F12" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AirlineDestinationDomain_5C82F3CE264B8E2E0946B57226BE7388" xlink:to="loc_us-gaap_PacificDestinationMember_1782D3C5A0DE0A605C51B57226BF4F12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_984C65C77917F8467AFBB57226BFC693" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_1A5EFD8A119FBC9D0A11B57226BFCBAF" xlink:to="loc_us-gaap_SalesRevenueNet_984C65C77917F8467AFBB57226BFC693" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/OperatingSegmentsAndRelatedDisclosuresTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_3A336502D4DF136AD4A2B57226C462C1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_B0C3832837660A616046B57226C428BB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A336502D4DF136AD4A2B57226C462C1" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_B0C3832837660A616046B57226C428BB" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_3E0970FCE6D9ACC9261AB57226C4B47E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_B0C3832837660A616046B57226C428BB" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_3E0970FCE6D9ACC9261AB57226C4B47E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_2A671921AC05010BB0E9B57226C4A994_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3E0970FCE6D9ACC9261AB57226C4B47E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_2A671921AC05010BB0E9B57226C4A994_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_2A671921AC05010BB0E9B57226C4A994" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_3E0970FCE6D9ACC9261AB57226C4B47E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_2A671921AC05010BB0E9B57226C4A994" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B1A4A0C2E460242271B2B57226C47FD1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_2A671921AC05010BB0E9B57226C4A994" xlink:to="loc_us-gaap_SubsidiariesMember_B1A4A0C2E460242271B2B57226C47FD1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_5A8DDEC7D2BF15269A42B57226C49ABE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_3A336502D4DF136AD4A2B57226C462C1" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_5A8DDEC7D2BF15269A42B57226C49ABE" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/QuarterlyFinancialDataAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_33DE76EC6F5A18CE1192B572267D3C58" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_33DE76EC6F5A18CE1192B572267D3C58" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_C19A33F9E18F59314105B572267D9191" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_33DE76EC6F5A18CE1192B572267D3C58" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_C19A33F9E18F59314105B572267D9191" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D4280BD82890CCE319C0B572267D0282_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C19A33F9E18F59314105B572267D9191" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D4280BD82890CCE319C0B572267D0282_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D4280BD82890CCE319C0B572267D0282" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_C19A33F9E18F59314105B572267D9191" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D4280BD82890CCE319C0B572267D0282" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_56B508D51D440BCB7699B572267D5FC6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_D4280BD82890CCE319C0B572267D0282" xlink:to="loc_us-gaap_SubsidiariesMember_56B508D51D440BCB7699B572267D5FC6" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OperatingAndNonoperatingSpecialChargesNet" xlink:label="loc_aal_OperatingAndNonoperatingSpecialChargesNet_DE95B986E9792AC45DA4B572267D101D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_aal_OperatingAndNonoperatingSpecialChargesNet_DE95B986E9792AC45DA4B572267D101D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmployeeTaxReformBonusExpense" xlink:label="loc_aal_EmployeeTaxReformBonusExpense_AEBE3801B049DDA68B47B572267DEC98" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_aal_EmployeeTaxReformBonusExpense_AEBE3801B049DDA68B47B572267DEC98" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmployeeTaxReformBonusAmount" xlink:label="loc_aal_EmployeeTaxReformBonusAmount_85C335EB2118E3F88FD5B572267D757A" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_aal_EmployeeTaxReformBonusAmount_85C335EB2118E3F88FD5B572267D757A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_AA97F8661FE32D17C5A4B572267D0E8A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_AA97F8661FE32D17C5A4B572267D0E8A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_90615B68F2A118FCEEE1B572267D83D9" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_us-gaap_RestructuringCharges_90615B68F2A118FCEEE1B572267D83D9" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_IncreaseDecreaseInFairValueBankruptcySettlementObligations" xlink:label="loc_aal_IncreaseDecreaseInFairValueBankruptcySettlementObligations_1E4925C2935B0D436119B572267D4FC1" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_aal_IncreaseDecreaseInFairValueBankruptcySettlementObligations_1E4925C2935B0D436119B572267D4FC1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit" xlink:label="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_E135B9ED649466AAEFC1B572267D7EF6" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_74C6A82808673C00E811B572267DE00D" xlink:to="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_E135B9ED649466AAEFC1B572267D7EF6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/QuarterlyFinancialDataSummarizedFinancialDataDetail" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationLineItems" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationTable" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationTable_95D6A936414F3B6F4642B57226829571" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_aal_SelectedQuarterlyFinancialInformationTable_95D6A936414F3B6F4642B57226829571" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_23ECDACD413E3DA1519BB57226821703" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationTable_95D6A936414F3B6F4642B57226829571" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_23ECDACD413E3DA1519BB57226821703" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_38A8DA3B66C8ACF545CAB5722682010B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_23ECDACD413E3DA1519BB57226821703" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_38A8DA3B66C8ACF545CAB5722682010B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_38A8DA3B66C8ACF545CAB5722682010B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_23ECDACD413E3DA1519BB57226821703" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_38A8DA3B66C8ACF545CAB5722682010B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_D35393F3215F98FF02C1B572268249D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_38A8DA3B66C8ACF545CAB5722682010B" xlink:to="loc_us-gaap_SubsidiariesMember_D35393F3215F98FF02C1B572268249D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SalesRevenueNet" xlink:label="loc_us-gaap_SalesRevenueNet_D03FA173AB6521554433B57226827287" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_SalesRevenueNet_D03FA173AB6521554433B57226827287" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CostsAndExpenses" xlink:label="loc_us-gaap_CostsAndExpenses_71155C47320D1C82C0D7B57226829E7A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_CostsAndExpenses_71155C47320D1C82C0D7B57226829E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_4F5AD1AF8CB731906D7EB5722682CB06" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_OperatingIncomeLoss_4F5AD1AF8CB731906D7EB5722682CB06" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_B0D9EC40E31DA1660C89B57226823ABF" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_NetIncomeLoss_B0D9EC40E31DA1660C89B57226823ABF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_163F082E68561398BD5FB5722682F804" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_EarningsPerShareAbstract_163F082E68561398BD5FB5722682F804" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_3A29B258F6717490525AB572268379D5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_163F082E68561398BD5FB5722682F804" xlink:to="loc_us-gaap_EarningsPerShareBasic_3A29B258F6717490525AB572268379D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_AF8D768191062C430D14B57226830EFE" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareAbstract_163F082E68561398BD5FB5722682F804" xlink:to="loc_us-gaap_EarningsPerShareDiluted_AF8D768191062C430D14B57226830EFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_8D981D8478D414C14A10B57226832835" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_E7F1235C7F7812BE0738B5722682344D" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_8D981D8478D414C14A10B57226832835" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F0DBF4A88CD052156C05B572268367F2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_8D981D8478D414C14A10B57226832835" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_F0DBF4A88CD052156C05B572268367F2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_F78A29C9F57E7ADCCAA7B57226831F88" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_8D981D8478D414C14A10B57226832835" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_F78A29C9F57E7ADCCAA7B57226831F88" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/QuarterlyFinancialDataUnaudited" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationLineItems" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3B29925D2C4917C97C68B572268A1C41" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationTable" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationTable_7B8E98AF25DE1EA23E5CB572268AFFA7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3B29925D2C4917C97C68B572268A1C41" xlink:to="loc_aal_SelectedQuarterlyFinancialInformationTable_7B8E98AF25DE1EA23E5CB572268AFFA7" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_5977DE7FD6471BD58326B572268AB4FD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationTable_7B8E98AF25DE1EA23E5CB572268AFFA7" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_5977DE7FD6471BD58326B572268AB4FD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1354F71B3AD8BBD770F9B572268ADE45_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_5977DE7FD6471BD58326B572268AB4FD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1354F71B3AD8BBD770F9B572268ADE45_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1354F71B3AD8BBD770F9B572268ADE45" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_5977DE7FD6471BD58326B572268AB4FD" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1354F71B3AD8BBD770F9B572268ADE45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_B44B23377377CCE1E3EBB572268AC574" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_1354F71B3AD8BBD770F9B572268ADE45" xlink:to="loc_us-gaap_SubsidiariesMember_B44B23377377CCE1E3EBB572268AC574" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="loc_us-gaap_QuarterlyFinancialInformationTextBlock_D6976C05A682C6D8AF02B572268B2058" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3B29925D2C4917C97C68B572268A1C41" xlink:to="loc_us-gaap_QuarterlyFinancialInformationTextBlock_D6976C05A682C6D8AF02B572268B2058" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/QuarterlyFinancialDataUnauditedTables" xlink:type="extended">
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationLineItems" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3698715084A2C72B4DD3B572268735CD" xlink:type="locator" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SelectedQuarterlyFinancialInformationTable" xlink:label="loc_aal_SelectedQuarterlyFinancialInformationTable_2BB6227B92582A159E67B57226869E03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3698715084A2C72B4DD3B572268735CD" xlink:to="loc_aal_SelectedQuarterlyFinancialInformationTable_2BB6227B92582A159E67B57226869E03" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_0B558F2C5B5A695E035DB5722686FB3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationTable_2BB6227B92582A159E67B57226869E03" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_0B558F2C5B5A695E035DB5722686FB3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D1AA78A2FC62AA59158EB5722686F79C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0B558F2C5B5A695E035DB5722686FB3C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D1AA78A2FC62AA59158EB5722686F79C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D1AA78A2FC62AA59158EB5722686F79C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0B558F2C5B5A695E035DB5722686FB3C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D1AA78A2FC62AA59158EB5722686F79C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_5CB0FDB40E808FF5A980B5722686A7AD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_D1AA78A2FC62AA59158EB5722686F79C" xlink:to="loc_us-gaap_SubsidiariesMember_5CB0FDB40E808FF5A980B5722686A7AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_038FCE963D28FC97184CB5722687B708" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_aal_SelectedQuarterlyFinancialInformationLineItems_3698715084A2C72B4DD3B572268735CD" xlink:to="loc_us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_038FCE963D28FC97184CB5722687B708" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/RiskManagement" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_15ACF6429F84DE263AD4B57227901C62" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_5559EEB5B45CC78BB290B57227902BC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_15ACF6429F84DE263AD4B57227901C62" xlink:to="loc_us-gaap_DebtInstrumentTable_5559EEB5B45CC78BB290B57227902BC2" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_03361B67A4B737692AC8B57227900ECB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_5559EEB5B45CC78BB290B57227902BC2" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_03361B67A4B737692AC8B57227900ECB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BC6E9891BE0D611913C0B57227907FD9_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_03361B67A4B737692AC8B57227900ECB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BC6E9891BE0D611913C0B57227907FD9_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_BC6E9891BE0D611913C0B57227907FD9" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_03361B67A4B737692AC8B57227900ECB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_BC6E9891BE0D611913C0B57227907FD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_6766688A1C107020B925B5722790908C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_BC6E9891BE0D611913C0B57227907FD9" xlink:to="loc_us-gaap_SubsidiariesMember_6766688A1C107020B925B5722790908C" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RiskManagementTextBlock" xlink:label="loc_aal_RiskManagementTextBlock_B150C4B5B3337B622147B5722790A4D6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_15ACF6429F84DE263AD4B57227901C62" xlink:to="loc_aal_RiskManagementTextBlock_B150C4B5B3337B622147B5722790A4D6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/RiskManagementAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="loc_us-gaap_DebtInstrumentLineItems_91FDFFE295F0364A3782B572278D01ED" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtInstrumentTable" xlink:label="loc_us-gaap_DebtInstrumentTable_9E1C9E24234EFE8B71C1B572278D79DC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_91FDFFE295F0364A3782B572278D01ED" xlink:to="loc_us-gaap_DebtInstrumentTable_9E1C9E24234EFE8B71C1B572278D79DC" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_79181F3B0BEC90C59093B572278DE23D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9E1C9E24234EFE8B71C1B572278D79DC" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_79181F3B0BEC90C59093B572278DE23D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FB3C97C787391D6C15CAB572278D628B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_79181F3B0BEC90C59093B572278DE23D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FB3C97C787391D6C15CAB572278D628B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_FB3C97C787391D6C15CAB572278D628B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_79181F3B0BEC90C59093B572278DE23D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_FB3C97C787391D6C15CAB572278D628B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_D48E59BAB02E11FB4772B572278D033E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_FB3C97C787391D6C15CAB572278D628B" xlink:to="loc_us-gaap_SubsidiariesMember_D48E59BAB02E11FB4772B572278D033E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeAxis" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_97B12D98CA80C914B724B572278DF1D2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_9E1C9E24234EFE8B71C1B572278D79DC" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_97B12D98CA80C914B724B572278DF1D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_68EEB4343402CAF5CB89B572278DAB78_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_97B12D98CA80C914B724B572278DF1D2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_68EEB4343402CAF5CB89B572278DAB78_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtTypeDomain" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_68EEB4343402CAF5CB89B572278DAB78" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_97B12D98CA80C914B724B572278DF1D2" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_68EEB4343402CAF5CB89B572278DAB78" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_VariableRateDebtMember" xlink:label="loc_aal_VariableRateDebtMember_83B15834191BC295BCCDB572278DE771" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_68EEB4343402CAF5CB89B572278DAB78" xlink:to="loc_aal_VariableRateDebtMember_83B15834191BC295BCCDB572278DE771" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LongtermDebtPercentageBearingVariableInterestAmount" xlink:label="loc_us-gaap_LongtermDebtPercentageBearingVariableInterestAmount_DBCFCEDE726CA0EC1922B572278D3E68" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_91FDFFE295F0364A3782B572278D01ED" xlink:to="loc_us-gaap_LongtermDebtPercentageBearingVariableInterestAmount_DBCFCEDE726CA0EC1922B572278D3E68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="loc_us-gaap_DebtWeightedAverageInterestRate_7A3EECA72D726F176E4EB572278D83E8" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_91FDFFE295F0364A3782B572278D01ED" xlink:to="loc_us-gaap_DebtWeightedAverageInterestRate_7A3EECA72D726F176E4EB572278D83E8" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9D30DAAB5E65F5E655CBB57226B9F3F0" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_115E03D8DD6F78FC247AB57226B9A12D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9D30DAAB5E65F5E655CBB57226B9F3F0" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_115E03D8DD6F78FC247AB57226B9A12D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_84C928A00014370A4C61B57226B91792" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_115E03D8DD6F78FC247AB57226B9A12D" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_84C928A00014370A4C61B57226B91792" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1CD37394306A391A0C12B57226B9C680_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_84C928A00014370A4C61B57226B91792" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1CD37394306A391A0C12B57226B9C680_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_1CD37394306A391A0C12B57226B9C680" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_84C928A00014370A4C61B57226B91792" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_1CD37394306A391A0C12B57226B9C680" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_BECA5014B7BE16303095B57226B9D112" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_1CD37394306A391A0C12B57226B9C680" xlink:to="loc_us-gaap_SubsidiariesMember_BECA5014B7BE16303095B57226B9D112" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_0672C57BCCFF86DDB936B57226B9D4E6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_9D30DAAB5E65F5E655CBB57226B9F3F0" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_0672C57BCCFF86DDB936B57226B9D4E6" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_FED6EA0063DD3EC89822B57226B2FBFE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:to="loc_us-gaap_AwardTypeAxis_FED6EA0063DD3EC89822B57226B2FBFE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BF8B643ADB639E4D9C4EB57226B23F7F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_FED6EA0063DD3EC89822B57226B2FBFE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BF8B643ADB639E4D9C4EB57226B23F7F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BF8B643ADB639E4D9C4EB57226B23F7F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_FED6EA0063DD3EC89822B57226B2FBFE" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BF8B643ADB639E4D9C4EB57226B23F7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_603CAC30ECE83C8846CEB57226B2FC1D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_BF8B643ADB639E4D9C4EB57226B23F7F" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_603CAC30ECE83C8846CEB57226B2FC1D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F0D5105A3A917D54F081B57226B22122" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F0D5105A3A917D54F081B57226B22122" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_E3232B7730A9291AC1D7B57226B26B7B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F0D5105A3A917D54F081B57226B22122" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_E3232B7730A9291AC1D7B57226B26B7B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_E3232B7730A9291AC1D7B57226B26B7B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F0D5105A3A917D54F081B57226B22122" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_E3232B7730A9291AC1D7B57226B26B7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_EB2B9C11F78F4CE6016FB57226B2ED03" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_E3232B7730A9291AC1D7B57226B26B7B" xlink:to="loc_us-gaap_SubsidiariesMember_EB2B9C11F78F4CE6016FB57226B2ED03" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_F95FF88CC5BCBB1E8772B57226B22820" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:to="loc_us-gaap_PlanNameAxis_F95FF88CC5BCBB1E8772B57226B22820" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_1A1F5E96ED65C6E5908DB57226B23EC2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_F95FF88CC5BCBB1E8772B57226B22820" xlink:to="loc_us-gaap_PlanNameDomain_1A1F5E96ED65C6E5908DB57226B23EC2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_1A1F5E96ED65C6E5908DB57226B23EC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_F95FF88CC5BCBB1E8772B57226B22820" xlink:to="loc_us-gaap_PlanNameDomain_1A1F5E96ED65C6E5908DB57226B23EC2" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AagIncentiveAwardPlan2013Member" xlink:label="loc_aal_AagIncentiveAwardPlan2013Member_E94CC568BA19C36EB954B57226B2F57E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_1A1F5E96ED65C6E5908DB57226B23EC2" xlink:to="loc_aal_AagIncentiveAwardPlan2013Member_E94CC568BA19C36EB954B57226B2F57E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_99573FC9B52B738D3902B57226B26668" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_5756538664CF01A1183CB57226B2226B" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_99573FC9B52B738D3902B57226B26668" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_86AFCF6B2684784C2622B57226B33DDA_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_99573FC9B52B738D3902B57226B26668" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_86AFCF6B2684784C2622B57226B33DDA_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_86AFCF6B2684784C2622B57226B33DDA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_99573FC9B52B738D3902B57226B26668" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_86AFCF6B2684784C2622B57226B33DDA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SpecialItemsNetMember" xlink:label="loc_aal_SpecialItemsNetMember_36EB0423CDED06A2B269B57226B3EAAB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_86AFCF6B2684784C2622B57226B33DDA" xlink:to="loc_aal_SpecialItemsNetMember_36EB0423CDED06A2B269B57226B3EAAB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_130DFCE2B04E345EA6C1B57226B3E289" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_130DFCE2B04E345EA6C1B57226B3E289" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_437BFDFB619627A8924FB57226B396B4" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_437BFDFB619627A8924FB57226B396B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F1416911CF812BA36A13B57226B3FBC3" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_F1416911CF812BA36A13B57226B3FBC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_98A130993F9B27858E9CB57226B335F4" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_98A130993F9B27858E9CB57226B335F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6F69AB5C29493CC1EA81B57226B3DD4F" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_D64702E2371667D55F05B57226B3D8D7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_6F69AB5C29493CC1EA81B57226B3DD4F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationRestrictedStockUnitAwardsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71087561A0E20C6D2487B57226AB8A27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71087561A0E20C6D2487B57226AB8A27" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_61A381701AD6D4675C4AB57226AB65BE" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71087561A0E20C6D2487B57226AB8A27" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_61A381701AD6D4675C4AB57226AB65BE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F32065DAD00397D96652B57226ABD33C_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_61A381701AD6D4675C4AB57226AB65BE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F32065DAD00397D96652B57226ABD33C_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_F32065DAD00397D96652B57226ABD33C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_61A381701AD6D4675C4AB57226AB65BE" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_F32065DAD00397D96652B57226ABD33C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_077E134AE3F209DB7A16B57226AB0C86" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_F32065DAD00397D96652B57226ABD33C" xlink:to="loc_us-gaap_SubsidiariesMember_077E134AE3F209DB7A16B57226AB0C86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_37914AC0CA486574FBA6B57226AB4B23" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_71087561A0E20C6D2487B57226AB8A27" xlink:to="loc_us-gaap_AwardTypeAxis_37914AC0CA486574FBA6B57226AB4B23" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0F83F050E073D383725AB57226AB5DE5_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_37914AC0CA486574FBA6B57226AB4B23" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0F83F050E073D383725AB57226AB5DE5_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0F83F050E073D383725AB57226AB5DE5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_37914AC0CA486574FBA6B57226AB4B23" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0F83F050E073D383725AB57226AB5DE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_AC56F79F3A55C3CF70ABB57226AC2ADD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0F83F050E073D383725AB57226AB5DE5" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_AC56F79F3A55C3CF70ABB57226AC2ADD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_37348D9B3F3C74E3C67BB57226AC9A27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_37348D9B3F3C74E3C67BB57226AC9A27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01E2E88F20702FDC91B4B57226AC9DFA" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_01E2E88F20702FDC91B4B57226AC9DFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_BF38E27D9E8CC5E7515BB57226AC7905" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_BF38E27D9E8CC5E7515BB57226AC7905" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2169ACF96B36892762D7B57226ACA26E" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_B03E4021D57521A0D03BB57226ACAD6B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_2169ACF96B36892762D7B57226ACA26E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C13EBBB387137306B46DB57226ACEC5F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_C13EBBB387137306B46DB57226ACEC5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D2B8068F87A905557BEFB57226AD2F35" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_D2B8068F87A905557BEFB57226AD2F35" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_F8FA20A39002D8A7371EB57226AD05CC" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_F8FA20A39002D8A7371EB57226AD05CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D6DB5683A70C391EEF37B57226AD4C5F" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B32052A6083D35B479F5B57226ACDAB0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_D6DB5683A70C391EEF37B57226AD4C5F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_BA9B1AAF2E90EA71ABF8B57226AD4132" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_BA9B1AAF2E90EA71ABF8B57226AD4132" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_D7457300A1F641CBDD98B57226ADF4D7" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_D7457300A1F641CBDD98B57226ADF4D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_F988BBFFDA87089A3794B57226ADD777" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_95EA7796E1EA06226E74B57226AC7569" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_F988BBFFDA87089A3794B57226ADD777" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationShareBasedCompensationAsu201609Details" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_D05EAF30E80B95E3AD41B5B6BF437633" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_25427A0A703FFB38B5B0B5B6BF41C56D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_D05EAF30E80B95E3AD41B5B6BF437633" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_25427A0A703FFB38B5B0B5B6BF41C56D" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3386AA9E6F805821BBE8B5B6BF42E423" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_25427A0A703FFB38B5B0B5B6BF41C56D" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3386AA9E6F805821BBE8B5B6BF42E423" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_26A3015AFD15C532B0B5B5B6BF42C705_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3386AA9E6F805821BBE8B5B6BF42E423" xlink:to="loc_us-gaap_EquityComponentDomain_26A3015AFD15C532B0B5B5B6BF42C705_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_26A3015AFD15C532B0B5B5B6BF42C705" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3386AA9E6F805821BBE8B5B6BF42E423" xlink:to="loc_us-gaap_EquityComponentDomain_26A3015AFD15C532B0B5B5B6BF42C705" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_802385C9162FCEE82259B5B6BF4286E8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_26A3015AFD15C532B0B5B5B6BF42C705" xlink:to="loc_us-gaap_RetainedEarningsMember_802385C9162FCEE82259B5B6BF4286E8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CC42DE688D31672210C5B5B6BF42C0E3" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_25427A0A703FFB38B5B0B5B6BF41C56D" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CC42DE688D31672210C5B5B6BF42C0E3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7AD876B959B3BB3ED0DCB5B6BF42665B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CC42DE688D31672210C5B5B6BF42C0E3" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7AD876B959B3BB3ED0DCB5B6BF42665B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TypeOfAdoptionMember" xlink:label="loc_us-gaap_TypeOfAdoptionMember_7AD876B959B3BB3ED0DCB5B6BF42665B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_CC42DE688D31672210C5B5B6BF42C0E3" xlink:to="loc_us-gaap_TypeOfAdoptionMember_7AD876B959B3BB3ED0DCB5B6BF42665B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountingStandardsUpdate201609Member" xlink:label="loc_us-gaap_AccountingStandardsUpdate201609Member_CC97173A36FE66C76DE3B5B6BF421B68" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_7AD876B959B3BB3ED0DCB5B6BF42665B" xlink:to="loc_us-gaap_AccountingStandardsUpdate201609Member_CC97173A36FE66C76DE3B5B6BF421B68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_87704F85D4ACCBF3749BB5B6BF42CA2C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_25427A0A703FFB38B5B0B5B6BF41C56D" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_87704F85D4ACCBF3749BB5B6BF42CA2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_26DAE1908FE20419051EB5B6BF421042_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_87704F85D4ACCBF3749BB5B6BF42CA2C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_26DAE1908FE20419051EB5B6BF421042_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_26DAE1908FE20419051EB5B6BF421042" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_87704F85D4ACCBF3749BB5B6BF42CA2C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_26DAE1908FE20419051EB5B6BF421042" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_427C0D131EED9A71086BB5B6BF42A189" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_26DAE1908FE20419051EB5B6BF421042" xlink:to="loc_us-gaap_SubsidiariesMember_427C0D131EED9A71086BB5B6BF42A189" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_214BC0746869DD0FCF1BB5B6BF43EE5E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_D05EAF30E80B95E3AD41B5B6BF437633" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_214BC0746869DD0FCF1BB5B6BF43EE5E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0926F6D597D9C57B6DD9B5B6BF43BCA2" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_D05EAF30E80B95E3AD41B5B6BF437633" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0926F6D597D9C57B6DD9B5B6BF43BCA2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationShareBasedCompensationStockAppreciationRightsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C53B85CC16A59678F32B5EBAE4B0F38" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C53B85CC16A59678F32B5EBAE4B0F38" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_EF31FD7F2395CD452550B5EBAE4C4661" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C53B85CC16A59678F32B5EBAE4B0F38" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_EF31FD7F2395CD452550B5EBAE4C4661" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_E7157C627262495EA13AB5EBAE4C73FC_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EF31FD7F2395CD452550B5EBAE4C4661" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_E7157C627262495EA13AB5EBAE4C73FC_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_E7157C627262495EA13AB5EBAE4C73FC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_EF31FD7F2395CD452550B5EBAE4C4661" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_E7157C627262495EA13AB5EBAE4C73FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_055C75D300747D21CDC3B5EBAE4C1191" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_E7157C627262495EA13AB5EBAE4C73FC" xlink:to="loc_us-gaap_SubsidiariesMember_055C75D300747D21CDC3B5EBAE4C1191" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_BCF796E35533EF896E93B5EBAE4C92BF" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C53B85CC16A59678F32B5EBAE4B0F38" xlink:to="loc_us-gaap_AwardTypeAxis_BCF796E35533EF896E93B5EBAE4C92BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0EB1038B68ED32D3FEC8B5EBAE4CA35B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_BCF796E35533EF896E93B5EBAE4C92BF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0EB1038B68ED32D3FEC8B5EBAE4CA35B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0EB1038B68ED32D3FEC8B5EBAE4CA35B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_BCF796E35533EF896E93B5EBAE4C92BF" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0EB1038B68ED32D3FEC8B5EBAE4CA35B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockAppreciationRightsSARSMember" xlink:label="loc_us-gaap_StockAppreciationRightsSARSMember_3F725CDF433ABF01E0F3B5EBAE4C2331" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_0EB1038B68ED32D3FEC8B5EBAE4CA35B" xlink:to="loc_us-gaap_StockAppreciationRightsSARSMember_3F725CDF433ABF01E0F3B5EBAE4C2331" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeAxis" xlink:label="loc_us-gaap_RangeAxis_B38ED2813E8559642A59B5EBAE4C1E3B" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_4C53B85CC16A59678F32B5EBAE4B0F38" xlink:to="loc_us-gaap_RangeAxis_B38ED2813E8559642A59B5EBAE4C1E3B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RangeAxis_B38ED2813E8559642A59B5EBAE4C1E3B" xlink:to="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RangeMember" xlink:label="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RangeAxis_B38ED2813E8559642A59B5EBAE4C1E3B" xlink:to="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MinimumMember" xlink:label="loc_us-gaap_MinimumMember_E2BE7925671DFF923E5EB5EBAE4C349B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4" xlink:to="loc_us-gaap_MinimumMember_E2BE7925671DFF923E5EB5EBAE4C349B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MaximumMember" xlink:label="loc_us-gaap_MaximumMember_730CB013FA20D35EA8C3B5EBAE4C5452" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RangeMember_BB3CA4E4DACDFDB4D486B5EBAE4C9DD4" xlink:to="loc_us-gaap_MaximumMember_730CB013FA20D35EA8C3B5EBAE4C5452" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionOfAwardsExchangeRatio" xlink:label="loc_aal_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionOfAwardsExchangeRatio_1FD6FC673A9ED8A4A389B5EBAE4C13AA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_aal_ShareBasedCompensationArrangementByShareBasedPaymentAwardConversionOfAwardsExchangeRatio_1FD6FC673A9ED8A4A389B5EBAE4C13AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_A134EEBED3FFF8434F69B5EBAE4C48E5" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_A134EEBED3FFF8434F69B5EBAE4C48E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_DA49D0A693E157225A16B5EBAE4C6F5C" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_DA49D0A693E157225A16B5EBAE4C6F5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_AE67024C179AFADAF12DB5EBAE4D703A" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsExercised_AE67024C179AFADAF12DB5EBAE4D703A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisedinPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisedinPeriodWeightedAverageGrantDateFairValue_9C3E562F7E31F469D24DB5EBAE4D6989" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsExercisedinPeriodWeightedAverageGrantDateFairValue_9C3E562F7E31F469D24DB5EBAE4D6989" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAggregateIntrinsicValueExercised" xlink:label="loc_aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAggregateIntrinsicValueExercised_D052C6A6B1FFFEE12FADB5EBAE4D9820" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_aal_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsOtherthanOptionsAggregateIntrinsicValueExercised_D052C6A6B1FFFEE12FADB5EBAE4D9820" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_147AA1191F9FE03C5B96B5EBAE4DE378" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_147AA1191F9FE03C5B96B5EBAE4DE378" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_82CAF521FCA60FA943ECB5EBAE4D274F" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding_82CAF521FCA60FA943ECB5EBAE4D274F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_99164468B76D75EE5817B5EBAE4D7523" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_75DBC8CB7A26C88D8ED4B5EBAE4C1417" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_99164468B76D75EE5817B5EBAE4D7523" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareBasedCompensationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_260E62A74F3DA08EDD44B57226B63125" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_29E1C6BDC84883F888DDB57226B6F2C8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_260E62A74F3DA08EDD44B57226B63125" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_29E1C6BDC84883F888DDB57226B6F2C8" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_0C835B525C70665E3454B57226B6417E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_29E1C6BDC84883F888DDB57226B6F2C8" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_0C835B525C70665E3454B57226B6417E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_960B604A24907890908AB57226B6182E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0C835B525C70665E3454B57226B6417E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_960B604A24907890908AB57226B6182E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_960B604A24907890908AB57226B6182E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_0C835B525C70665E3454B57226B6417E" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_960B604A24907890908AB57226B6182E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_5648ED6A0F16CB7026CAB57226B6EF27" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_960B604A24907890908AB57226B6182E" xlink:to="loc_us-gaap_SubsidiariesMember_5648ED6A0F16CB7026CAB57226B6EF27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_40DC18181748E107F91FB57226B64974" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_260E62A74F3DA08EDD44B57226B63125" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_40DC18181748E107F91FB57226B64974" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareRepurchaseProgramsAndDividends" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareRepurchaseProgramsAndDividendsDividendsDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/ShareRepurchaseProgramsAndDividendsShareRepurchaseProgramsDetail" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsAdditionalDisclosuresDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_530EEA27FC282FCB7A4FB572281CE05D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_463FDB96E8F9FB56BCA5B572281CD68A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_530EEA27FC282FCB7A4FB572281CE05D" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_463FDB96E8F9FB56BCA5B572281CD68A" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_BDE37AA5578F3701F97FB572281C4201" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_463FDB96E8F9FB56BCA5B572281CD68A" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_BDE37AA5578F3701F97FB572281C4201" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_847D03E5EA3A9D35E6F4B572281CB7F8_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BDE37AA5578F3701F97FB572281C4201" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_847D03E5EA3A9D35E6F4B572281CB7F8_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_847D03E5EA3A9D35E6F4B572281CB7F8" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_BDE37AA5578F3701F97FB572281C4201" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_847D03E5EA3A9D35E6F4B572281CB7F8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_8DDB4D378BC3ECE5B744B572281C215B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_847D03E5EA3A9D35E6F4B572281CB7F8" xlink:to="loc_us-gaap_SubsidiariesMember_8DDB4D378BC3ECE5B744B572281C215B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_C97EE6D553263CBD5ECEB572281C3F39" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_463FDB96E8F9FB56BCA5B572281CD68A" xlink:to="loc_us-gaap_ProductOrServiceAxis_C97EE6D553263CBD5ECEB572281C3F39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_CDBA42277F5C1CFD4ACCB572281C7342_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_C97EE6D553263CBD5ECEB572281C3F39" xlink:to="loc_us-gaap_ProductsAndServicesDomain_CDBA42277F5C1CFD4ACCB572281C7342_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_CDBA42277F5C1CFD4ACCB572281C7342" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_C97EE6D553263CBD5ECEB572281C3F39" xlink:to="loc_us-gaap_ProductsAndServicesDomain_CDBA42277F5C1CFD4ACCB572281C7342" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MainlineMember" xlink:label="loc_us-gaap_MainlineMember_6AB8F630FD35554167BFB572281C767B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_CDBA42277F5C1CFD4ACCB572281C7342" xlink:to="loc_us-gaap_MainlineMember_6AB8F630FD35554167BFB572281C767B" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmployeeTaxReformBonusAmount" xlink:label="loc_aal_EmployeeTaxReformBonusAmount_3453E0C6CDD0696B8892B572281CF04F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_530EEA27FC282FCB7A4FB572281CE05D" xlink:to="loc_aal_EmployeeTaxReformBonusAmount_3453E0C6CDD0696B8892B572281CF04F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsComponentsOfSpecialItemsNetIncludedInConsolidatedStatementsOfOperationsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1AC428C8068BF5E71324B5B6C134F179" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1AC428C8068BF5E71324B5B6C134F179" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_9E86C9CEA0A8D4638ED4B5B6C1345322" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1AC428C8068BF5E71324B5B6C134F179" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_9E86C9CEA0A8D4638ED4B5B6C1345322" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A283C46D6FDDF627D76EB5B6C134C89A_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9E86C9CEA0A8D4638ED4B5B6C1345322" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A283C46D6FDDF627D76EB5B6C134C89A_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_A283C46D6FDDF627D76EB5B6C134C89A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_9E86C9CEA0A8D4638ED4B5B6C1345322" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_A283C46D6FDDF627D76EB5B6C134C89A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_8ECAA689FDB94E3F25E6B5B6C134D166" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_A283C46D6FDDF627D76EB5B6C134C89A" xlink:to="loc_us-gaap_SubsidiariesMember_8ECAA689FDB94E3F25E6B5B6C134D166" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_44BCCD0A0F49C7A56A95B5B6C1354733" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_1AC428C8068BF5E71324B5B6C134F179" xlink:to="loc_us-gaap_ProductOrServiceAxis_44BCCD0A0F49C7A56A95B5B6C1354733" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_89932DD0C0A6C6063CC9B5B6C1353576_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_44BCCD0A0F49C7A56A95B5B6C1354733" xlink:to="loc_us-gaap_ProductsAndServicesDomain_89932DD0C0A6C6063CC9B5B6C1353576_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_89932DD0C0A6C6063CC9B5B6C1353576" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_44BCCD0A0F49C7A56A95B5B6C1354733" xlink:to="loc_us-gaap_ProductsAndServicesDomain_89932DD0C0A6C6063CC9B5B6C1353576" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MainlineMember" xlink:label="loc_us-gaap_MainlineMember_06DA43715E1F45393D74B5B6C1357E81" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_89932DD0C0A6C6063CC9B5B6C1353576" xlink:to="loc_us-gaap_MainlineMember_06DA43715E1F45393D74B5B6C1357E81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_8A2738D9C38ED21D564AB5B6C135D0D4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_us-gaap_BusinessCombinationIntegrationRelatedCosts_8A2738D9C38ED21D564AB5B6C135D0D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCharges" xlink:label="loc_us-gaap_RestructuringCharges_48E044E0A3A0DBA7E33DB5B6C1359E66" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_us-gaap_RestructuringCharges_48E044E0A3A0DBA7E33DB5B6C1359E66" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_EmployeeTaxReformBonusExpense" xlink:label="loc_aal_EmployeeTaxReformBonusExpense_1B0DDCB980B1E55302BAB5B6C1359F61" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_EmployeeTaxReformBonusExpense_1B0DDCB980B1E55302BAB5B6C1359F61" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_LaborContractExpenses" xlink:label="loc_aal_LaborContractExpenses_4F218DFBBF9D866EB4B7B5B6C135ACFA" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_LaborContractExpenses_4F218DFBBF9D866EB4B7B5B6C135ACFA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_MarkToMarketAdjustmentsForBankruptcyObligationsAndOther" xlink:label="loc_aal_MarkToMarketAdjustmentsForBankruptcyObligationsAndOther_97816FE657D75F7256CDB5B6C135A08D" xlink:type="locator" />
    <link:definitionArc order="5" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_MarkToMarketAdjustmentsForBankruptcyObligationsAndOther_97816FE657D75F7256CDB5B6C135A08D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherOperatingSpecialChargesNet" xlink:label="loc_aal_OtherOperatingSpecialChargesNet_136FE89F80E7D0B7E585B5B6C13580CE" xlink:type="locator" />
    <link:definitionArc order="6" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_OtherOperatingSpecialChargesNet_136FE89F80E7D0B7E585B5B6C13580CE" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestructuringAndOtherMainline" xlink:label="loc_aal_RestructuringAndOtherMainline_413771018BA305D0532EB5B6C1359E9D" xlink:type="locator" />
    <link:definitionArc order="7" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_RestructuringAndOtherMainline_413771018BA305D0532EB5B6C1359E9D" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestructuringAndOtherRegional" xlink:label="loc_aal_RestructuringAndOtherRegional_B3853BF4F9678BF607B2B5B6C1352BCD" xlink:type="locator" />
    <link:definitionArc order="8" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_RestructuringAndOtherRegional_B3853BF4F9678BF607B2B5B6C1352BCD" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_RestructuringAndOtherNet" xlink:label="loc_aal_RestructuringAndOtherNet_96D90AB181D51A70BB3FB5B6C135DC12" xlink:type="locator" />
    <link:definitionArc order="9" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_RestructuringAndOtherNet_96D90AB181D51A70BB3FB5B6C135DC12" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_DebtRefinancingandDebtExtinguishmentExpense" xlink:label="loc_aal_DebtRefinancingandDebtExtinguishmentExpense_9D380B2357F63B9F815EB5B6C13543C1" xlink:type="locator" />
    <link:definitionArc order="10" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_DebtRefinancingandDebtExtinguishmentExpense_9D380B2357F63B9F815EB5B6C13543C1" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_AmountRecognizedInIncomeDueToInflationaryAccountingNet" xlink:label="loc_aal_AmountRecognizedInIncomeDueToInflationaryAccountingNet_DA6374E020A9E136CD1FB5B6C1354E08" xlink:type="locator" />
    <link:definitionArc order="11" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_AmountRecognizedInIncomeDueToInflationaryAccountingNet_DA6374E020A9E136CD1FB5B6C1354E08" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherNonOperatingSpecialChargesCreditsNet" xlink:label="loc_aal_OtherNonOperatingSpecialChargesCreditsNet_2125DD56C255358A423CB5B6C13607BA" xlink:type="locator" />
    <link:definitionArc order="12" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_OtherNonOperatingSpecialChargesCreditsNet_2125DD56C255358A423CB5B6C13607BA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_NonoperatingSpecialItemsNet" xlink:label="loc_aal_NonoperatingSpecialItemsNet_A3FE6955995197F8CA3DB5B6C136DDBA" xlink:type="locator" />
    <link:definitionArc order="13" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_NonoperatingSpecialItemsNet_A3FE6955995197F8CA3DB5B6C136DDBA" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit" xlink:label="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_C083172CE40214EB6221B5B6C136143E" xlink:type="locator" />
    <link:definitionArc order="14" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_TaxCutsAndJobsActOf2017IncompleteAccountingProvisionalIncomeTaxExpenseBenefit_C083172CE40214EB6221B5B6C136143E" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ReversalOfValuationAllowance" xlink:label="loc_aal_ReversalOfValuationAllowance_43BFE82CC09E8CC60407B5B6C136CB33" xlink:type="locator" />
    <link:definitionArc order="15" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_ReversalOfValuationAllowance_43BFE82CC09E8CC60407B5B6C136CB33" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherTaxCharges" xlink:label="loc_aal_OtherTaxCharges_27DA76FCF00F327125A0B5B6C1369C4A" xlink:type="locator" />
    <link:definitionArc order="16" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_OtherTaxCharges_27DA76FCF00F327125A0B5B6C1369C4A" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_IncomeTaxesSpecialItemsNet" xlink:label="loc_aal_IncomeTaxesSpecialItemsNet_A8AA06596B08C2FC7160B5B6C136C41C" xlink:type="locator" />
    <link:definitionArc order="17" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_83B48902B6CE6ED638B4B5B6C1357357" xlink:to="loc_aal_IncomeTaxesSpecialItemsNet_A8AA06596B08C2FC7160B5B6C136C41C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsNet" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_4D41061FCF98AD2AD3F9B5722840610F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0809ECEC5D26C155056AB572283FD40F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4D41061FCF98AD2AD3F9B5722840610F" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0809ECEC5D26C155056AB572283FD40F" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F2DC8AB15E8909C6F2B5B572283F917B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_0809ECEC5D26C155056AB572283FD40F" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F2DC8AB15E8909C6F2B5B572283F917B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_C65DB9232A677E79D02CB57228401A6D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F2DC8AB15E8909C6F2B5B572283F917B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_C65DB9232A677E79D02CB57228401A6D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_C65DB9232A677E79D02CB57228401A6D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F2DC8AB15E8909C6F2B5B572283F917B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_C65DB9232A677E79D02CB57228401A6D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_ECC81A4143555CCA5BC6B572284025E5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_C65DB9232A677E79D02CB57228401A6D" xlink:to="loc_us-gaap_SubsidiariesMember_ECC81A4143555CCA5BC6B572284025E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock" xlink:label="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_82F5C0B75C13D342558DB57228409259" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_4D41061FCF98AD2AD3F9B5722840610F" xlink:to="loc_us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_82F5C0B75C13D342558DB57228409259" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SpecialItemsNetTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RestructuringCostAndReserveLineItems" xlink:label="loc_us-gaap_RestructuringCostAndReserveLineItems_A92E46DDCD73367A29B3B57228373538" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTable" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_897DD6135E8D4B966F76B572283741B6" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A92E46DDCD73367A29B3B57228373538" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_897DD6135E8D4B966F76B572283741B6" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_B168AE9B189E4CB26025B57228375358" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_897DD6135E8D4B966F76B572283741B6" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_B168AE9B189E4CB26025B57228375358" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B21DF71C614BC354166BB57228379D1F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_B168AE9B189E4CB26025B57228375358" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B21DF71C614BC354166BB57228379D1F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B21DF71C614BC354166BB57228379D1F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_B168AE9B189E4CB26025B57228375358" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B21DF71C614BC354166BB57228379D1F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_F360A1DA34D3DFC41CFEB57228379299" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B21DF71C614BC354166BB57228379D1F" xlink:to="loc_us-gaap_SubsidiariesMember_F360A1DA34D3DFC41CFEB57228379299" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_46792ED7D1085173FC59B5722837E10E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RestructuringCostAndReserveLineItems_A92E46DDCD73367A29B3B57228373538" xlink:to="loc_us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_46792ED7D1085173FC59B5722837E10E" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SubsequentEvent" xlink:type="extended" />
  <link:definitionLink xlink:role="http://www.aa.com/role/SubsequentEventAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventLineItems" xlink:label="loc_us-gaap_SubsequentEventLineItems_880A3ADFA473686C3140B57226761555" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTable" xlink:label="loc_us-gaap_SubsequentEventTable_DE4661B7F6205983C63AB57226768D75" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_880A3ADFA473686C3140B57226761555" xlink:to="loc_us-gaap_SubsequentEventTable_DE4661B7F6205983C63AB57226768D75" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_1212B291EB9240DF8231B5722676CF0F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_DE4661B7F6205983C63AB57226768D75" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_1212B291EB9240DF8231B5722676CF0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D4C1B8B072DF80E2A5ECB5722676DC7D_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1212B291EB9240DF8231B5722676CF0F" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D4C1B8B072DF80E2A5ECB5722676DC7D_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_D4C1B8B072DF80E2A5ECB5722676DC7D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1212B291EB9240DF8231B5722676CF0F" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_D4C1B8B072DF80E2A5ECB5722676DC7D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsequentEventMember" xlink:label="loc_us-gaap_SubsequentEventMember_6BF5467FEFF939D4A95BB57226768EC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_D4C1B8B072DF80E2A5ECB5722676DC7D" xlink:to="loc_us-gaap_SubsequentEventMember_6BF5467FEFF939D4A95BB57226768EC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_56AB72DFEF99CF4B2653B5722676309F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_880A3ADFA473686C3140B57226761555" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_56AB72DFEF99CF4B2653B5722676309F" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_7D4432116C8CC23271D2B57226D0665B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsTable" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F2DC5925203B813EA1E5B57226D04117" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_7D4432116C8CC23271D2B57226D0665B" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F2DC5925203B813EA1E5B57226D04117" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F3FDD0247E2F7AA8D7E7B57226D0923D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F2DC5925203B813EA1E5B57226D04117" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F3FDD0247E2F7AA8D7E7B57226D0923D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_778D2274714F5CC1C618B57226D022DD_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F3FDD0247E2F7AA8D7E7B57226D0923D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_778D2274714F5CC1C618B57226D022DD_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_778D2274714F5CC1C618B57226D022DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F3FDD0247E2F7AA8D7E7B57226D0923D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_778D2274714F5CC1C618B57226D022DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_4A9C01E67088769795CFB57226D077CC" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_778D2274714F5CC1C618B57226D022DD" xlink:to="loc_us-gaap_SubsidiariesMember_4A9C01E67088769795CFB57226D077CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashFlowSupplementalDisclosuresTextBlock" xlink:label="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_413F6DDD1C5E66501B28B57226D052B3" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_7D4432116C8CC23271D2B57226D0665B" xlink:to="loc_us-gaap_CashFlowSupplementalDisclosuresTextBlock_413F6DDD1C5E66501B28B57226D052B3" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformationCashFlowInformationAndNonCashInvestingAndFinancingActivitiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3C340342E8676F53EC24B57226CB039A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsTable" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_32CF61ECBED262F7E66AB57226CA418B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3C340342E8676F53EC24B57226CB039A" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_32CF61ECBED262F7E66AB57226CA418B" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_5D24B198C4F5876394C4B57226CA0384" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_32CF61ECBED262F7E66AB57226CA418B" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_5D24B198C4F5876394C4B57226CA0384" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9302F4B8F4E91DF5CA0FB57226CAA557_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_5D24B198C4F5876394C4B57226CA0384" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9302F4B8F4E91DF5CA0FB57226CAA557_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_9302F4B8F4E91DF5CA0FB57226CAA557" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_5D24B198C4F5876394C4B57226CA0384" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_9302F4B8F4E91DF5CA0FB57226CAA557" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_2B047CCFD9D8E44633BBB57226CB090E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_9302F4B8F4E91DF5CA0FB57226CAA557" xlink:to="loc_us-gaap_SubsidiariesMember_2B047CCFD9D8E44633BBB57226CB090E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract" xlink:label="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_3DDE083FDF74C2D352C8B57226CBAAD5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3C340342E8676F53EC24B57226CB039A" xlink:to="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_3DDE083FDF74C2D352C8B57226CBAAD5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TransferOfInvestments" xlink:label="loc_us-gaap_TransferOfInvestments_E6969C623B1E76E50797B57226CB1D32" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_3DDE083FDF74C2D352C8B57226CBAAD5" xlink:to="loc_us-gaap_TransferOfInvestments_E6969C623B1E76E50797B57226CB1D32" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation" xlink:label="loc_aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation_341AF3483C1A29B777BFB57226CBCED9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_3DDE083FDF74C2D352C8B57226CBAAD5" xlink:to="loc_aal_OtherSignificantNoncashTransactionBankruptcySettlementObligation_341AF3483C1A29B777BFB57226CBCED9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeaseObligationsIncurred" xlink:label="loc_us-gaap_CapitalLeaseObligationsIncurred_9C2DDEF5671026AD8CF5B57226CB6283" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_3DDE083FDF74C2D352C8B57226CBAAD5" xlink:to="loc_us-gaap_CapitalLeaseObligationsIncurred_9C2DDEF5671026AD8CF5B57226CB6283" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_F3889F71C95873A34990B57226CB1C84" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_3C340342E8676F53EC24B57226CB039A" xlink:to="loc_us-gaap_SupplementalCashFlowInformationAbstract_F3889F71C95873A34990B57226CB1C84" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InterestPaidNet" xlink:label="loc_us-gaap_InterestPaidNet_D127483A0471CA266491B57226CBFB76" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_F3889F71C95873A34990B57226CB1C84" xlink:to="loc_us-gaap_InterestPaidNet_D127483A0471CA266491B57226CBFB76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncomeTaxesPaid" xlink:label="loc_us-gaap_IncomeTaxesPaid_4D21202B41FB941D3B8EB57226CB3227" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SupplementalCashFlowInformationAbstract_F3889F71C95873A34990B57226CB1C84" xlink:to="loc_us-gaap_IncomeTaxesPaid_4D21202B41FB941D3B8EB57226CB3227" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/SupplementalCashFlowInformationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsLineItems" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_011416EA164CB0BF0D22B57226CE26FB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherSignificantNoncashTransactionsTable" xlink:label="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F16C0C28AF5A7E492A13B57226CDE184" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_011416EA164CB0BF0D22B57226CE26FB" xlink:to="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F16C0C28AF5A7E492A13B57226CDE184" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_1D0E8BC87A84AB41D92FB57226CD1951" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsTable_F16C0C28AF5A7E492A13B57226CDE184" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_1D0E8BC87A84AB41D92FB57226CD1951" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D761C0C37E8BD6CD842EB57226CEDEC2_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1D0E8BC87A84AB41D92FB57226CD1951" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D761C0C37E8BD6CD842EB57226CEDEC2_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_D761C0C37E8BD6CD842EB57226CEDEC2" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1D0E8BC87A84AB41D92FB57226CD1951" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_D761C0C37E8BD6CD842EB57226CEDEC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_9A3AAA3DF9C4492BD4A6B57226CE4F3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_D761C0C37E8BD6CD842EB57226CEDEC2" xlink:to="loc_us-gaap_SubsidiariesMember_9A3AAA3DF9C4492BD4A6B57226CE4F3C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_F7DA9D39F8B7AE450BE8B57226CE7D98" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherSignificantNoncashTransactionsLineItems_011416EA164CB0BF0D22B57226CE26FB" xlink:to="loc_us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock_F7DA9D39F8B7AE450BE8B57226CE7D98" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionsWithRelatedParties" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_638741530BD66DF3DB58B5722672E292" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4EF04BF79D78F51B1FE3B5722671E5ED" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_638741530BD66DF3DB58B5722672E292" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4EF04BF79D78F51B1FE3B5722671E5ED" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F5A8DB3FEEDBC9ED38F0B5722672762B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_4EF04BF79D78F51B1FE3B5722671E5ED" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F5A8DB3FEEDBC9ED38F0B5722672762B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_98D8239985FF6F1DE93BB5722672E4A4_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F5A8DB3FEEDBC9ED38F0B5722672762B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_98D8239985FF6F1DE93BB5722672E4A4_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_98D8239985FF6F1DE93BB5722672E4A4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F5A8DB3FEEDBC9ED38F0B5722672762B" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_98D8239985FF6F1DE93BB5722672E4A4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_AA3720500A9FEA0238CFB572267270DD" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_98D8239985FF6F1DE93BB5722672E4A4" xlink:to="loc_us-gaap_SubsidiariesMember_AA3720500A9FEA0238CFB572267270DD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_C8A2E1470631CD45D7D3B5722672ED8C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_638741530BD66DF3DB58B5722672E292" xlink:to="loc_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_C8A2E1470631CD45D7D3B5722672ED8C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionsWithRelatedPartiesAdditionalInformationDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_F0C21B3C39ACF39B8453B57226614737" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_F0C21B3C39ACF39B8453B57226614737" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_E5E6757806EB43371452B5722660360D" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_E5E6757806EB43371452B5722660360D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_13C465D338D7776781B4B5722660230F_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5E6757806EB43371452B5722660360D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_13C465D338D7776781B4B5722660230F_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_13C465D338D7776781B4B5722660230F" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_E5E6757806EB43371452B5722660360D" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_13C465D338D7776781B4B5722660230F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_8DA678AEF805C84AE864B5722660249B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_13C465D338D7776781B4B5722660230F" xlink:to="loc_us-gaap_SubsidiariesMember_8DA678AEF805C84AE864B5722660249B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductOrServiceAxis" xlink:label="loc_us-gaap_ProductOrServiceAxis_DD391C926565C63BD8D3B5722660972A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:to="loc_us-gaap_ProductOrServiceAxis_DD391C926565C63BD8D3B5722660972A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_E4EA98EAB595B9B1AB7BB572266173E1_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ProductOrServiceAxis_DD391C926565C63BD8D3B5722660972A" xlink:to="loc_us-gaap_ProductsAndServicesDomain_E4EA98EAB595B9B1AB7BB572266173E1_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProductsAndServicesDomain" xlink:label="loc_us-gaap_ProductsAndServicesDomain_E4EA98EAB595B9B1AB7BB572266173E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ProductOrServiceAxis_DD391C926565C63BD8D3B5722660972A" xlink:to="loc_us-gaap_ProductsAndServicesDomain_E4EA98EAB595B9B1AB7BB572266173E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RegionalCarrierMember" xlink:label="loc_us-gaap_RegionalCarrierMember_BF6D37D3AA1BEF6709CAB5722661A789" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductsAndServicesDomain_E4EA98EAB595B9B1AB7BB572266173E1" xlink:to="loc_us-gaap_RegionalCarrierMember_BF6D37D3AA1BEF6709CAB5722661A789" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4254B06AB8FB95ED131B57226612E3D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4254B06AB8FB95ED131B57226612E3D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_74F85BC9FDE596A10E27B5722661145E_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4254B06AB8FB95ED131B57226612E3D" xlink:to="loc_us-gaap_RelatedPartyDomain_74F85BC9FDE596A10E27B5722661145E_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_74F85BC9FDE596A10E27B5722661145E" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_C4254B06AB8FB95ED131B57226612E3D" xlink:to="loc_us-gaap_RelatedPartyDomain_74F85BC9FDE596A10E27B5722661145E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiaryOfCommonParentMember" xlink:label="loc_us-gaap_SubsidiaryOfCommonParentMember_651288309D0811B5C472B57226614D02" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_74F85BC9FDE596A10E27B5722661145E" xlink:to="loc_us-gaap_SubsidiaryOfCommonParentMember_651288309D0811B5C472B57226614D02" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_A0D59DA3D827699EA630B57226613C92" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D0C4CBE02752B1A370FBB572265EC041" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_A0D59DA3D827699EA630B57226613C92" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_2881D0690DFBF9216C14B57226619103_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_A0D59DA3D827699EA630B57226613C92" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_2881D0690DFBF9216C14B57226619103_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_2881D0690DFBF9216C14B57226619103" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_A0D59DA3D827699EA630B57226613C92" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_2881D0690DFBF9216C14B57226619103" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AirlineCapacityPurchaseArrangementsMember" xlink:label="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_38589CC945D4E9E97024B572266136E4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_2881D0690DFBF9216C14B57226619103" xlink:to="loc_us-gaap_AirlineCapacityPurchaseArrangementsMember_38589CC945D4E9E97024B572266136E4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty" xlink:label="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_1079BA5091C6501D5926B5722661D1C4" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_F0C21B3C39ACF39B8453B57226614737" xlink:to="loc_us-gaap_RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty_1079BA5091C6501D5926B5722661D1C4" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionsWithRelatedPartiesDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_7BD79125EE674B90EAE3B57226688B48" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D8C3F95743A27871E6BAB57226686A24" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_7BD79125EE674B90EAE3B57226688B48" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D8C3F95743A27871E6BAB57226686A24" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_A3630402811A870B0628B57226681B55" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D8C3F95743A27871E6BAB57226686A24" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_A3630402811A870B0628B57226681B55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B590EA55A65392DCE2DCB5722668CE68_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_A3630402811A870B0628B57226681B55" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B590EA55A65392DCE2DCB5722668CE68_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_B590EA55A65392DCE2DCB5722668CE68" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_A3630402811A870B0628B57226681B55" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_B590EA55A65392DCE2DCB5722668CE68" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_7C69C06CA5D4E34ADB60B5722668EDFA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_B590EA55A65392DCE2DCB5722668CE68" xlink:to="loc_us-gaap_SubsidiariesMember_7C69C06CA5D4E34ADB60B5722668EDFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_75E37680C7A46CA48612B57226681EE1" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_D8C3F95743A27871E6BAB57226686A24" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_75E37680C7A46CA48612B57226681EE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_75E37680C7A46CA48612B57226681EE1" xlink:to="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyDomain" xlink:label="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_75E37680C7A46CA48612B57226681EE1" xlink:to="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ParentCompanyMember" xlink:label="loc_us-gaap_ParentCompanyMember_A78469211FC46801312BB5722668DEC7" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918" xlink:to="loc_us-gaap_ParentCompanyMember_A78469211FC46801312BB5722668DEC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiaryOfCommonParentMember" xlink:label="loc_us-gaap_SubsidiaryOfCommonParentMember_245F5AC13015676B8ED8B5722668F3DB" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_214534B5E08BE299DC49B5722668B918" xlink:to="loc_us-gaap_SubsidiaryOfCommonParentMember_245F5AC13015676B8ED8B5722668F3DB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent" xlink:label="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_0D48D58ECD49D81C7C05B57226694D43" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_7BD79125EE674B90EAE3B57226688B48" xlink:to="loc_us-gaap_RelatedPartyTransactionDueFromToRelatedPartyCurrent_0D48D58ECD49D81C7C05B57226694D43" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/TransactionsWithRelatedPartiesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_F4A3E0B2D7391848C2EBB572266D2E8D" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_AFC2B74D51AAAF180B80B572266C3CC5" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_F4A3E0B2D7391848C2EBB572266D2E8D" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_AFC2B74D51AAAF180B80B572266C3CC5" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_8A6EC58C25A72CC3A368B572266CA7FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_AFC2B74D51AAAF180B80B572266C3CC5" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_8A6EC58C25A72CC3A368B572266CA7FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_5F35A7D1F6B13A1E4F23B572266CE887_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8A6EC58C25A72CC3A368B572266CA7FB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_5F35A7D1F6B13A1E4F23B572266CE887_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_5F35A7D1F6B13A1E4F23B572266CE887" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_8A6EC58C25A72CC3A368B572266CA7FB" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_5F35A7D1F6B13A1E4F23B572266CE887" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_7043F88350AAE630CE03B572266DA53B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_5F35A7D1F6B13A1E4F23B572266CE887" xlink:to="loc_us-gaap_SubsidiariesMember_7043F88350AAE630CE03B572266DA53B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_21322097ABDB2464C99DB572266D4A56" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_F4A3E0B2D7391848C2EBB572266D2E8D" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_21322097ABDB2464C99DB572266D4A56" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationAndQualifyingAccounts" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_F54435DA3FCD2413CB11B5722697FE02" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_E5E49B70F82A4C730716B57226972026" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_F54435DA3FCD2413CB11B5722697FE02" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_E5E49B70F82A4C730716B57226972026" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_84A0A157ED7AE46D7FEAB57226976C71" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_E5E49B70F82A4C730716B57226972026" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_84A0A157ED7AE46D7FEAB57226976C71" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_3A6C3BB63BEC15C735CFB57226975F4B_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_84A0A157ED7AE46D7FEAB57226976C71" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_3A6C3BB63BEC15C735CFB57226975F4B_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_3A6C3BB63BEC15C735CFB57226975F4B" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_84A0A157ED7AE46D7FEAB57226976C71" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_3A6C3BB63BEC15C735CFB57226975F4B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_690A750C7213943313DDB5722697C4DA" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_3A6C3BB63BEC15C735CFB57226975F4B" xlink:to="loc_us-gaap_SubsidiariesMember_690A750C7213943313DDB5722697C4DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock" xlink:label="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_7852E6A11412833B39E8B5722697D83C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_F54435DA3FCD2413CB11B5722697FE02" xlink:to="loc_us-gaap_ScheduleOfValuationAndQualifyingAccountsDisclosureTextBlock_7852E6A11412833B39E8B5722697D83C" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationAndQualifyingAccountsComponentsOfValuationAndQualifyingAccountsDetail" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_079206340ED507664D7EB572269183D1" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_35AE6CDA4027C493EFE7B57226917F96" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_079206340ED507664D7EB572269183D1" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_35AE6CDA4027C493EFE7B57226917F96" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_F93477C9DC0A0A2DBFCFB572269159D0" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_35AE6CDA4027C493EFE7B57226917F96" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_F93477C9DC0A0A2DBFCFB572269159D0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CDD31FE70F38FAD7E38CB5722691B430_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F93477C9DC0A0A2DBFCFB572269159D0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CDD31FE70F38FAD7E38CB5722691B430_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_CDD31FE70F38FAD7E38CB5722691B430" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_F93477C9DC0A0A2DBFCFB572269159D0" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_CDD31FE70F38FAD7E38CB5722691B430" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_EFC274BA3560CCCC2A6FB5722691E74C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_CDD31FE70F38FAD7E38CB5722691B430" xlink:to="loc_us-gaap_SubsidiariesMember_EFC274BA3560CCCC2A6FB5722691E74C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesTypeAxis" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_699B424BEC282055ED3DB57226915241" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_35AE6CDA4027C493EFE7B57226917F96" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_699B424BEC282055ED3DB57226915241" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_699B424BEC282055ED3DB57226915241" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDomain" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesTypeAxis_699B424BEC282055ED3DB57226915241" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_InventoryValuationReserveMember" xlink:label="loc_us-gaap_InventoryValuationReserveMember_CABCF04DB62F9CBE7B09B572269153E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492" xlink:to="loc_us-gaap_InventoryValuationReserveMember_CABCF04DB62F9CBE7B09B572269153E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsMember" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsMember_27F4C806A80E0948AA38B5722691E3D9" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowancesAndReservesDomain_4408276235EB1E5E9642B5722691B492" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsMember_27F4C806A80E0948AA38B5722691E3D9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_MovementInValuationAllowancesAndReservesRollForward" xlink:label="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_079206340ED507664D7EB572269183D1" xlink:to="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesBalance" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesBalance_74C8E159857B0D22FCE7B572269150E1" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesBalance_74C8E159857B0D22FCE7B572269150E1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_96443399473EA4767E27B57226912D7A" xlink:type="locator" />
    <link:definitionArc order="2" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesChargedToCostAndExpense_96443399473EA4767E27B57226912D7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesDeductions" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0BC53CAEF6412FDB71DEB57226927F4D" xlink:type="locator" />
    <link:definitionArc order="3" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesDeductions_0BC53CAEF6412FDB71DEB57226927F4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAllowancesAndReservesAdjustments" xlink:label="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_3E59931299BBD66AAFCAB57226927EF2" xlink:type="locator" />
    <link:definitionArc order="4" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInValuationAllowancesAndReservesRollForward_0A473599A1C0C3CFCC39B57226912A1A" xlink:to="loc_us-gaap_ValuationAllowancesAndReservesAdjustments_3E59931299BBD66AAFCAB57226927EF2" xlink:type="arc" />
  </link:definitionLink>
  <link:definitionLink xlink:role="http://www.aa.com/role/ValuationAndQualifyingAccountsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_BDCCAF37F38063C97B3FB5722694334C" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ValuationAndQualifyingAccountsDisclosureTable" xlink:label="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_DACCA12DCF0FB234ACF3B5722694EA3C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_BDCCAF37F38063C97B3FB5722694334C" xlink:to="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_DACCA12DCF0FB234ACF3B5722694EA3C" xlink:type="arc" xbrldt:closed="true" xbrldt:contextElement="segment" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesAxis" xlink:label="loc_us-gaap_ConsolidatedEntitiesAxis_1311E7BF2AAE2CB640D0B5722694598C" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureTable_DACCA12DCF0FB234ACF3B5722694EA3C" xlink:to="loc_us-gaap_ConsolidatedEntitiesAxis_1311E7BF2AAE2CB640D0B5722694598C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_90AFBA7C419A2F4A28EEB5722694A6FB_default" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1311E7BF2AAE2CB640D0B5722694598C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_90AFBA7C419A2F4A28EEB5722694A6FB_default" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConsolidatedEntitiesDomain" xlink:label="loc_us-gaap_ConsolidatedEntitiesDomain_90AFBA7C419A2F4A28EEB5722694A6FB" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConsolidatedEntitiesAxis_1311E7BF2AAE2CB640D0B5722694598C" xlink:to="loc_us-gaap_ConsolidatedEntitiesDomain_90AFBA7C419A2F4A28EEB5722694A6FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SubsidiariesMember" xlink:label="loc_us-gaap_SubsidiariesMember_BCB99378E8641C1D408EB57226949869" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConsolidatedEntitiesDomain_90AFBA7C419A2F4A28EEB5722694A6FB" xlink:to="loc_us-gaap_SubsidiariesMember_BCB99378E8641C1D408EB57226949869" xlink:type="arc" />
    <link:loc xlink:href="aal-20171231.xsd#aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock" xlink:label="loc_aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock_7351E1E3A751F5C6DF18B5722694F889" xlink:type="locator" />
    <link:definitionArc order="1" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAndQualifyingAccountsDisclosureLineItems_BDCCAF37F38063C97B3FB5722694334C" xlink:to="loc_aal_ScheduleOfValuationAndQualifyingAccountsTableTextBlock_7351E1E3A751F5C6DF18B5722694F889" xlink:type="arc" />
  </link:definitionLink>
</link:linkbase>





