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OTHER INCOME, BY FUNCTION (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of other operating income [text block] [Abstract]  
Schedule of other income by function
   For the year ended 
   December 31, 
   2020   2019   2018 
   ThUS$   ThUS$   ThUS$ 
Coalition and loyalty program Multiplus   -    36,172    126,443 
Tours   22,499    96,997    108,448 
Aircraft leasing   46,045    102,704    78,056 
Customs and warehousing   25,138    29,353    26,667 
Duty free   -    543    3,555 
Maintenance   18,579    10,471    16,569 
Income from non-airlines products Latam Pass   42,913    42,791    19,864 
Other miscellaneous income (*)   255,828    41,833    93,156 
Total   411,002    360,864    472,758