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OTHER NON-FINANCIAL ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure Of Other Non Financial Assets Explanatory [Abstract] |
Schedule of composition of Other non-financial assets [Text Block]] |
|  | Current assets |  |  | Non-current assets |  |  | Total Assets |
|  | As of December 31, 2019 |  |  | As of December 31, 2018 |  |  | As of December 31, 2019 |  |  | As of December 31, 2018 |  |  | As of December 31, 2019 |  |  | As of December 31, 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
|  |  |  |  | Restated |  |  |  |  |  | Restated |  |  |  |  |  | Restated |
(a) Advance payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft insurance and other |  |  | 11,179 |  |  |  | 16,483 |  |  |  | 523 |  |  |  | - |  |  |  | 11,702 |  |  |  | 16,483 |
Others |  |  | 15,167 |  |  |  | 20,105 |  |  |  | 1,832 |  |  |  | 4,460 |  |  |  | 16,999 |  |  |  | 24,565 |
Subtotal advance payments |  |  | 26,346 |  |  |  | 36,588 |  |  |  | 2,355 |  |  |  | 4,460 |  |  |  | 28,701 |  |  |  | 41,048 |
(b) Contract assets (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
GDS costs |  |  | 16,593 |  |  |  | 14,708 |  |  |  | - |  |  |  | - |  |  |  | 16,593 |  |  |  | 14,708 |
Credit card commissions |  |  | 23,437 |  |  |  | 21,614 |  |  |  | - |  |  |  | - |  |  |  | 23,437 |  |  |  | 21,614 |
Travel agencies commissions |  |  | 16,546 |  |  |  | 12,635 |  |  |  | - |  |  |  | - |  |  |  | 16,546 |  |  |  | 12,635 |
Subtotal advance payments |  |  | 56,576 |  |  |  | 48,957 |  |  |  | - |  |  |  | - |  |  |  | 56,576 |  |  |  | 48,957 |
(c) Other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft maintenance reserve (2) |  |  | 27,987 |  |  |  | 831 |  |  |  | 17,844 |  |  |  | 51,836 |  |  |  | 45,831 |  |  |  | 52,667 |
Sales tax |  |  | 167,987 |  |  |  | 187,410 |  |  |  | 34,680 |  |  |  | 38,186 |  |  |  | 202,667 |  |  |  | 225,596 |
Other taxes |  |  | 34,295 |  |  |  | 15,255 |  |  |  | - |  |  |  | - |  |  |  | 34,295 |  |  |  | 15,255 |
Contributions to Société Internationale de |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Télécommunications Aéronautiques (“SITA”) |  |  | 258 |  |  |  | 258 |  |  |  | 739 |  |  |  | 739 |  |  |  | 997 |  |  |  | 997 |
Judicial deposits |  |  | - |  |  |  | - |  |  |  | 149,310 |  |  |  | 132,267 |  |  |  | 149,310 |  |  |  | 132,267 |
Others |  |  | - |  |  |  | 1,177 |  |  |  | - |  |  |  | 53 |  |  |  | - |  |  |  | 1,230 |
Subtotal other assets |  |  | 230,527 |  |  |  | 204,931 |  |  |  | 202,573 |  |  |  | 223,081 |  |  |  | 433,100 |  |  |  | 428,012 |
Total Other Non - Financial Assets |  |  | 313,449 |  |  |  | 290,476 |  |  |  | 204,928 |  |  |  | 227,541 |  |  |  | 518,377 |  |  |  | 518,017 |
(1) Movement of Contracts assets: (2) Aircraft maintenance reserves reflect prepayment deposits made by the group to lessors of certain aircraft under operating lease agreements in order to ensure that funds are available to support the scheduled heavy maintenance of the aircraft.
Schedule of movement of Contracts assets [Text Block]] |
|  |  |  |  |  |  |  | Adjustments |  |  | Difference |  |  |  |  |  |  |
|  | Initial |  |  |  |  |  | by the application |  |  | by |  |  |  |  |  | Final |
|  | balance |  |  | Activation |  |  | IFRS 15 |  |  | conversion |  |  | Amortization |  |  | balance |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
From January 1 to December 31, 2018 |  |  | - |  |  |  | 180,171 |  |  |  | 54,361 |  |  |  | (5,019 | ) |  |  | (180,556 | ) |  |  | 48,957 |
From January 1 to December 31, 2019 |  |  | 48,957 |  |  |  | 166,300 |  |  |  | - |  |  |  | (4,950 | ) |  |  | (153,731 | ) |  |  | 56,576 |

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