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REVENUE (Tables)
12 Months Ended
Dec. 31, 2020
Disclosure of revenue [text block] [Abstract]  
Schedule of detail of revenues
   For the year ended 
   December 31, 
   2020   2019   2018 
   ThUS$   ThUS$   ThUS$ 
             
Passengers   2,713,774    9,005,629    8,708,988 
Cargo   1,209,893    1,064,434    1,186,468 
Total   3,923,667    10,070,063    9,895,456