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OTHER INCOME, BY FUNCTION (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of other operating income [text block] [Abstract] |  |
Delta airlines compensation | $ 118,188 | $ 132,467

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- Definition The amount of compensation from third parties. + References No definition available. + Details
Name: | ltm_DeltaAirLineIncCompensation
Namespace Prefix: | ltm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | ltm_DisclosureOfOtherOperatingIncomeTextBlockAbstract
Namespace Prefix: | ltm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration