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TRANSACTIONS WITH RELATED PARTIES - Issued (Details) - Key management personnel of entity or parent - Additional Remuneration Units (ARU) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of transactions between related parties [line items] |  |  |
Total | $ 848 | $ 534 | $ 0
URAs Directors |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Total | 763 | 481 | 0
URAs Board Committee |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Total | $ 85 | $ 53 | $ 0

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Remuneration Expense + References No definition available. + Details
Name: | ltm_RemunerationExpense
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_KeyManagementPersonnelOfEntityOrParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=ltm_AdditionalRemunerationUnitsARUMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_TitleOfIndividualAxis=srt_DirectorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_TitleOfIndividualAxis=ltm_BoardCommitteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |