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OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | $ 313,449 | $ 290,476 | $ 275,549 | $ 244,778 | $ 212,242
Non-current assets |  | 204,928 | 227,541 | $ 220,807 | $ 212,203 |
Total Assets |  | 518,377 | 518,017 |  |  |
Advance Payments Categories [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 26,346 | 36,588 |  |  |
Non-current assets |  | 2,355 | 4,460 |  |  |
Total Assets |  | 28,701 | 41,048 |  |  |
Contract assets [member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets | [1] | 56,576 | 48,957 |  |  |
Non-current assets | [1] |  |  |  |  |
Total Assets | [1] | 56,576 | 48,957 |  |  |
Aircraft Insurance And Other [Member] | Advance Payments Categories [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 11,179 | 16,483 |  |  |
Non-current assets |  | 523 |  |  |  |
Total Assets |  | 11,702 | 16,483 |  |  |
Others [Member] | Advance Payments Categories [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 15,167 | 20,105 |  |  |
Non-current assets |  | 1,832 | 4,460 |  |  |
Total Assets |  | 16,999 | 24,565 |  |  |
GDS Costs [Member] | Contract assets [member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets | [1] | 16,593 | 14,708 |  |  |
Non-current assets | [1] |  |  |  |  |
Total Assets | [1] | 16,593 | 14,708 |  |  |
Credit Card Commissions [Member] | Contract assets [member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets | [1] | 23,437 | 21,614 |  |  |
Non-current assets | [1] |  |  |  |  |
Total Assets | [1] | 23,437 | 21,614 |  |  |
Travel Agencies Commissions [Member] | Contract assets [member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets | [1] | 16,546 | 12,635 |  |  |
Non-current assets | [1] |  |  |  |  |
Total Assets | [1] | 16,546 | 12,635 |  |  |
Aircraft Maintenance Reserve [Member] | Other Assets [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets | [2] | 27,987 | 831 |  |  |
Non-current assets | [2] | 17,844 | 51,836 |  |  |
Total Assets | [2] | 45,831 | 52,667 |  |  |
Sales Tax [Member] | Other Assets [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 167,987 | 187,410 |  |  |
Non-current assets |  | 34,680 | 38,186 |  |  |
Total Assets |  | 202,667 | 225,596 |  |  |
Other Assets [Member] | Other Assets [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 230,527 | 1,177 |  |  |
Non-current assets |  | 202,573 | 53 |  |  |
Total Assets |  | 433,100 | 1,230 |  |  |
Other Assets [Member] | Other Taxes [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 34,295 | 15,255 |  |  |
Non-current assets |  |  |  |  |  |
Total Assets |  | 34,295 | 15,255 |  |  |
Contributions to Societe Internationale de Telecommunications Aeronautiques ("SITA") [Member] | Other Assets [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  | 258 | 258 |  |  |
Non-current assets |  | 739 | 739 |  |  |
Total Assets |  | 997 | 997 |  |  |
Judicial Deposits [Member] | Other Assets [Member] |  |  |  |  |  |
OTHER NON-FINANCIAL ASSETS (Details) - Schedule of composition of Other non-financial assets [Line Items] |  |  |  |  |  |
Other financial assets |  |  |  |  |  |
Non-current assets |  | 149,310 | 132,267 |  |  |
Total Assets |  | $ 149,310 | $ 132,267 |  |  |
[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.

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