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OTHER NON-FINANCIAL LIABILITIES - Schedule of deferred income movement (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Deferred Income Movement [Roll Forward] |  |  |
Initial balance | $ 3,393,600 | $ 2,953,289 | $ 2,785,193
Recognition | 15,679,754 | 14,238,959 | 9,772,469
Use | (15,073,167) | (13,505,496) | (9,077,188)
Loyalty program (Award and redeem) | (126,564) | 17,680 | (241,201)
Expiration of tickets | (347,873) | (391,998) | (314,027)
Translation Difference | (260,364) | 84,988 | 4,585
Others provisions | (7,043) | (3,822) | 23,458
Final balance | 3,258,343 | $ 3,393,600 | $ 2,953,289
Recognized income from Delta Air Lines | $ 35,615 |  |

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- Definition The increase (decrease) in other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2024-01-01 -Paragraph 84 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2024-en-r&anchor=para_84&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of non-financial liabilities that the entity does not separately disclose in the same statement or note. [Refer: Other financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Deferred Income Movement + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
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Period Type: | duration

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- Definition Expiration of tickets. + References No definition available. + Details
Name: | ltm_ExpirationOfTickets
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of loyalty program. + References No definition available. + Details
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Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Amount of recognition. + References No definition available. + Details
Name: | ltm_Recognition
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Related Party Recognized Income + References No definition available. + Details
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Namespace Prefix: | ltm_
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Balance Type: | credit
Period Type: | duration

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- Definition Amount of translation difference deferred income. + References No definition available. + Details
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- Definition Amount of use deferred income. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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