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STATEMENT OF CASH FLOWS - Schedule of obtained (payments) of flows related to financing (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Supplemental Cash Flow Information [Line Items] |  |  |
Capital raising | $ 1,750,060 | $ 0 | $ 7,217,900
Payments Capital | (2,348,580) | (567,363) | (8,891,330)
Payments Interest | (717,634) | (594,234) | (521,717)
Aircraft financing |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
Capital raising | 99,000 | 0 | 0
Payments Capital | (198,774) | (251,388) | (331,292)
Payments Interest | (69,249) | (76,497) | (52,088)
Lease liability |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
Capital raising | 0 | 0 | 0
Payments Capital | (344,038) | (225,358) | (131,917)
Payments Interest | (288,176) | (173,924) | (49,076)
Non-aircraft financing |  |  |
Supplemental Cash Flow Information [Line Items] |  |  |
Capital raising | 1,651,060 | 0 | 7,217,900
Payments Capital | (1,805,768) | (90,617) | (8,428,121)
Payments Interest | $ (360,209) | $ (343,813) | $ (420,553)

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- Definition The capital raising. + References No definition available. + Details
Name: | ltm_CapitalRaising
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The payments to capital. + References No definition available. + Details
Name: | ltm_PaymentsCapital
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The payments to capital interest. + References No definition available. + Details
Name: | ltm_PaymentsInterest
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Supplemental Cash Flow Information + References No definition available. + Details
Name: | ltm_SupplementalCashFlowInformationLineItems
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

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