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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019cd9b3-4cc9-79a0-ad66-84beb50bfc1c,g:a3b4ec9c-bf4b-4ea9-ac88-fff461dc9c63-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.aa.com/role/DocumentandEntityInformationDocument" xlink:type="simple" xlink:href="aal-20260317.xsd#DocumentandEntityInformationDocument"/>
  <link:definitionLink xlink:role="http://www.aa.com/role/DocumentandEntityInformationDocument" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019cd9b3-4cc9-71fd-ba74-3441edb41742" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntitiesTable_019cd9b3-4cc9-71fd-ba74-3441edb41742" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_019cd9b3-4cc9-741f-9894-53901b507a11" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019cd9b3-4cc9-71fd-ba74-3441edb41742" xlink:to="loc_srt_ConsolidatedEntitiesAxis_019cd9b3-4cc9-741f-9894-53901b507a11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cd9b3-4cc9-741f-9894-53901b507a11_default" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cd9b3-4cc9-741f-9894-53901b507a11" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cd9b3-4cc9-741f-9894-53901b507a11_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_019cd9b3-4cc9-7ab1-b952-e5d7f7e901ab" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_019cd9b3-4cc9-741f-9894-53901b507a11" xlink:to="loc_srt_ConsolidatedEntitiesDomain_019cd9b3-4cc9-7ab1-b952-e5d7f7e901ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SubsidiariesMember_019cd9b3-4cc9-79ca-9d16-82fcc41224b5" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_019cd9b3-4cc9-7ab1-b952-e5d7f7e901ab" xlink:to="loc_srt_SubsidiariesMember_019cd9b3-4cc9-79ca-9d16-82fcc41224b5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019cd9b3-4cc9-71fd-ba74-3441edb41742" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b" xlink:to="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7b21-bf9b-b27c48263899" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019cd9b3-4cc9-7702-bd65-61e5c6d32b0b" xlink:to="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7b21-bf9b-b27c48263899" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019cd9b3-4cc9-7187-9d20-42e089bb7232" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7b21-bf9b-b27c48263899" xlink:to="loc_us-gaap_CommonStockMember_019cd9b3-4cc9-7187-9d20-42e089bb7232" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WarrantMember_019cd9b3-4cc9-7440-bc7c-3f1f7f3d401d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019cd9b3-4cc9-7b21-bf9b-b27c48263899" xlink:to="loc_us-gaap_WarrantMember_019cd9b3-4cc9-7440-bc7c-3f1f7f3d401d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019cd9b3-4cca-7186-a4df-3300bb7d9f75" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_DocumentType_019cd9b3-4cca-7186-a4df-3300bb7d9f75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019cd9b3-4cca-70fd-a66c-81ea573f9c1a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_AmendmentFlag_019cd9b3-4cca-70fd-a66c-81ea573f9c1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019cd9b3-4cca-76ba-b0dd-66693c1f53e9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_DocumentPeriodEndDate_019cd9b3-4cca-76ba-b0dd-66693c1f53e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019cd9b3-4cca-7e4a-b7a7-c4cb9aecbc24" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityRegistrantName_019cd9b3-4cca-7e4a-b7a7-c4cb9aecbc24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019cd9b3-4cca-7645-8c78-c9217efd96b4" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityCentralIndexKey_019cd9b3-4cca-7645-8c78-c9217efd96b4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019cd9b3-4cca-7c77-8744-499eebfe5efc" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019cd9b3-4cca-7c77-8744-499eebfe5efc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019cd9b3-4cca-79a9-b292-df3296eaa39a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityFileNumber_019cd9b3-4cca-79a9-b292-df3296eaa39a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019cd9b3-4cca-72e1-8b10-4dfbc8558352" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityTaxIdentificationNumber_019cd9b3-4cca-72e1-8b10-4dfbc8558352" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019cd9b3-4cca-7dca-bc92-653e3d5ed4c2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityAddressAddressLine1_019cd9b3-4cca-7dca-bc92-653e3d5ed4c2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019cd9b3-4cca-7210-a840-6d830bc89f5e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityAddressCityOrTown_019cd9b3-4cca-7210-a840-6d830bc89f5e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019cd9b3-4cca-7c5d-a62f-0c61943c77cb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityAddressStateOrProvince_019cd9b3-4cca-7c5d-a62f-0c61943c77cb" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019cd9b3-4cca-72f8-adbd-f676129929ed" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityAddressPostalZipCode_019cd9b3-4cca-72f8-adbd-f676129929ed" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019cd9b3-4cca-7d71-9b2b-ea50f82fc088" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_CityAreaCode_019cd9b3-4cca-7d71-9b2b-ea50f82fc088" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019cd9b3-4cca-75e3-97f6-2a7d801f35eb" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_LocalPhoneNumber_019cd9b3-4cca-75e3-97f6-2a7d801f35eb" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019cd9b3-4cca-7242-897c-c208b5be6eb2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_WrittenCommunications_019cd9b3-4cca-7242-897c-c208b5be6eb2" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019cd9b3-4cca-7b8e-aee2-4ffccbf1b6f0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_SolicitingMaterial_019cd9b3-4cca-7b8e-aee2-4ffccbf1b6f0" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019cd9b3-4cca-74c0-99ed-90f432fbdb18" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_PreCommencementTenderOffer_019cd9b3-4cca-74c0-99ed-90f432fbdb18" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019cd9b3-4cca-7d78-be72-6c773b1fc1b6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019cd9b3-4cca-7d78-be72-6c773b1fc1b6" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019cd9b3-4cca-7d27-9e50-e2e516d34f3d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_Security12bTitle_019cd9b3-4cca-7d27-9e50-e2e516d34f3d" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019cd9b3-4cca-7bbd-958b-171012ad52ec" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_TradingSymbol_019cd9b3-4cca-7bbd-958b-171012ad52ec" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019cd9b3-4cca-7a98-b0bf-4d312bf48286" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_SecurityExchangeName_019cd9b3-4cca-7a98-b0bf-4d312bf48286" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019cd9b3-4cca-7719-8911-efe955227663" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019cd9b3-4cca-793b-a76a-109feb9be78a" xlink:to="loc_dei_EntityEmergingGrowthCompany_019cd9b3-4cca-7719-8911-efe955227663" xlink:type="arc" order="21"/>
  </link:definitionLink>
</link:linkbase>
