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INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Net Carrying Amount [Member] | Airports Slots [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | $ 845,959 | $ 828,969
Intangible assets other than goodwill, Net | 845,959 | 828,969
Net Carrying Amount [Member] | Loyalty Program [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 263,806 | 274,420
Intangible assets other than goodwill, Net | 263,806 | 274,420
Net Carrying Amount [Member] | Computer software [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 220,993 | 156,038
Intangible assets other than goodwill, Net | 220,993 | 156,038
Net Carrying Amount [Member] | Developing Software [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 99,193 | 151,853
Intangible assets other than goodwill, Net | 99,193 | 151,853
Net Carrying Amount [Member] | Brand names [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 17,959 | 29,361
Intangible assets other than goodwill, Net | 17,959 | 29,361
Net Carrying Amount [Member] | Other intangible assets [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 331 | 431
Intangible assets other than goodwill, Net | 331 | 431
Gross carrying amount [member] | Airports Slots [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 845,959 | 828,969
Intangible assets other than goodwill, Net | 845,959 | 828,969
Gross carrying amount [member] | Loyalty Program [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 263,806 | 274,420
Intangible assets other than goodwill, Net | 263,806 | 274,420
Gross carrying amount [member] | Computer software [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 656,699 | 529,009
Intangible assets other than goodwill, Net | 656,699 | 529,009
Gross carrying amount [member] | Developing Software [Member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 99,193 | 151,853
Intangible assets other than goodwill, Net | 99,193 | 151,853
Gross carrying amount [member] | Brand names [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 51,326 | 53,391
Intangible assets other than goodwill, Net | 51,326 | 53,391
Gross carrying amount [member] | Other intangible assets [member] |  |
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items] |  |
Intangible assets other than goodwill, Gross | 1,315 | 1,325
Intangible assets other than goodwill, Net | $ 1,315 | $ 1,325

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