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INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net $ 1,046,559 $ 1,448,241
Intangible assets other than goodwill, gross 1,470,951 1,918,298
Airport slots [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net 627,742 845,959
Intangible assets other than goodwill, gross 627,742 845,959
Loyalty program [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net 204,615 263,806
Intangible assets other than goodwill, gross 204,615 263,806
Computer software [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net 139,113 220,993
Intangible assets other than goodwill, gross 528,097 656,699
Developing software [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net 68,521 99,193
Intangible assets other than goodwill, gross 69,379 99,193
Trademarks [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net [1] 6,340 17,959
Intangible assets other than goodwill, gross [1] 39,803 51,326
Other assets [Member]    
INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - Schedule of intangible assets [Line Items]    
Intangible assets other than goodwill, net 228 331
Intangible assets other than goodwill, gross $ 1,315 $ 1,315
[1] In 2016, the Company resolved to adopt a unique name and identity, and announced that the group’s brand will be LATAM, which united all the companies under a single image.