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INTANGIBLE ASSETS OTHER THAN GOODWILL (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | $ 1,441,072 | $ 1,617,247 | $ 1,610,313 | $ 1,321,425
Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 1,838,967 | 1,981,284 |  |
Airport Slots [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill | [1] | 828,969 | 964,513 | 978,849 | 816,987
Airport Slots [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 828,969 | 964,513 |  |
Loyalty Program [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 274,420 | 321,440 |  |
Loyalty Program [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 274,420 | 321,440 |  |
Computer Software [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 156,469 | 160,970 | 157,016 | 104,258
Computer Software [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 529,009 | 509,377 |  |
Developing Software [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 151,853 | 123,415 | $ 91,053 | $ 74,887
Developing Software [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 151,853 | 123,415 |  |
Trade Marks [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill | [2] | 29,361 | 46,909 |  |
Trade Marks [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill | [2] | 53,391 | 62,539 |  |
Other Assets [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | 431 |  |  |
Other Assets [Member] | Gross Book Value [Member] |  |  |  |  |
Disclosure of detailed information about intangible assets [line items] |  |  |  |  |
Intangible assets other than goodwill |  | $ 1,325 |  |  |
[1] | See Note 2.5
[2] | 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.

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