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ACCOUNTS PAYABLE, NON-CURRENT (Tables)
 12 Months Ended
Dec. 31, 2017
Trade and other payables [abstract]  
Schedule of accounts payable, non-current

    As of     As of  
    December 31,     December 31,  
    2017     2016  
    ThUS$     ThUS$  
             
Aircraft and engine maintenance     483,795       347,085  
Provision for vacations and bonuses     14,725       12,080  
Other sundry liabilities     312       226  
Total accounts payable, non-current     498,832       359,391