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ACCOUNTS PAYABLE, NON-CURRENT (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure Of Trade And Other Payables Non Current Explanatory [Abstract]  
Schedule of accounts payable, non-current
   As of   As of 
   December 31,   December 31, 
   2020   2019 
   ThUS$   ThUS$ 
         
Aircraft and engine maintenance   392,347    412,710 
Fleet (JOL)   208,037    190,225 
Provision for vacations and bonuses   15,036    15,868 
Other sundry liabilities   36,180    307 
Total accounts payable, non-current   651,600    619,110