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PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Construction in progress [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | $ 372,589 | [1] | $ 630,320 | [1] | $ 556,822 | $ 470,065
Accumulated depreciation |  | 372,589 | [1] | 630,320 | [1] | 556,822 | 470,065
Net Book Value |  | 372,589 | [1] | 630,320 | [1] | 556,822 | 470,065
Land [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 48,406 |  | 45,424 |  |  |
Accumulated depreciation |  | 48,406 |  | 45,424 |  |  |
Net Book Value |  | 48,406 |  | 45,424 |  |  |
Buildings [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 74,862 |  | 112,565 |  | 124,548 | 130,219
Accumulated depreciation |  | 74,862 |  | 112,565 |  | 124,548 | 130,219
Net Book Value |  | 74,862 |  | 112,565 |  | 124,548 | 130,219
Plant and Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 9,363,043 |  | 8,972,500 |  |  |
Accumulated depreciation |  | 9,363,043 |  | 8,972,500 |  |  |
Net Book Value |  | 9,363,043 |  | 8,972,500 |  |  |
Owned aircraft [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 8,847,351 |  | 8,498,248 |  |  |
Accumulated depreciation |  | 8,847,351 |  | 8,498,248 |  |  |
Net Book Value |  | 8,847,351 |  | 8,498,248 |  |  |
Others [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value | [2] | 515,692 |  | 474,252 |  |  |
Accumulated depreciation | [2] | 515,692 |  | 474,252 |  |  |
Net Book Value | [2] | 515,692 |  | 474,252 |  |  |
Machinery [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 5,217 |  | 6,594 |  |  |
Accumulated depreciation |  | 5,217 |  | 6,594 |  |  |
Net Book Value |  | 5,217 |  | 6,594 |  |  |
Information Technology Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 20,776 |  | 22,564 |  | 30,156 | 39,714
Accumulated depreciation |  | 20,776 |  | 22,564 |  | 30,156 | 39,714
Net Book Value |  | 20,776 |  | 22,564 |  | 30,156 | 39,714
Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 59,834 |  | 71,009 |  | 80,777 | 83,912
Accumulated depreciation |  | 59,834 |  | 71,009 |  | 80,777 | 83,912
Net Book Value |  | 59,834 |  | 71,009 |  | 80,777 | 83,912
Motor vehicles [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 6,733 |  | 9,122 |  | 436 | 1,045
Accumulated depreciation |  | 6,733 |  | 9,122 |  | 436 | 1,045
Net Book Value |  | 6,733 |  | 9,122 |  | 436 | 1,045
Leasehold improvements [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 98,460 |  | 83,267 |  | 84,225 | 104,541
Accumulated depreciation |  | 98,460 |  | 83,267 |  | 84,225 | 104,541
Net Book Value |  | 98,460 |  | 83,267 |  | $ 84,225 | $ 104,541
Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 2,869,698 |  | 2,548,444 |  |  |
Accumulated depreciation |  | 2,869,698 |  | 2,548,444 |  |  |
Net Book Value |  | 2,869,698 |  | 2,548,444 |  |  |
OTHERS [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 101,158 |  | 92,110 |  |  |
Accumulated depreciation |  | 101,158 |  | 92,110 |  |  |
Net Book Value |  | 101,158 |  | 92,110 |  |  |
Gross carrying amount [member] | Construction in progress [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value | [1] | 372,589 |  | 630,320 |  |  |
Accumulated depreciation | [1] | 372,589 |  | 630,320 |  |  |
Net Book Value | [1] | 372,589 |  | 630,320 |  |  |
Gross carrying amount [member] | Land [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 48,406 |  | 45,424 |  |  |
Accumulated depreciation |  | 48,406 |  | 45,424 |  |  |
Net Book Value |  | 48,406 |  | 45,424 |  |  |
Gross carrying amount [member] | Buildings [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 133,488 |  | 179,907 |  |  |
Accumulated depreciation |  | 133,488 |  | 179,907 |  |  |
Net Book Value |  | 133,488 |  | 179,907 |  |  |
Gross carrying amount [member] | Plant and Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 13,993,044 |  | 13,333,837 |  |  |
Accumulated depreciation |  | 13,993,044 |  | 13,333,837 |  |  |
Net Book Value |  | 13,993,044 |  | 13,333,837 |  |  |
Gross carrying amount [member] | Owned aircraft [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 13,268,562 |  | 12,595,223 |  |  |
Accumulated depreciation |  | 13,268,562 |  | 12,595,223 |  |  |
Net Book Value |  | 13,268,562 |  | 12,595,223 |  |  |
Gross carrying amount [member] | Others [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value | [2] | 724,482 |  | 738,614 |  |  |
Accumulated depreciation | [2] | 724,482 |  | 738,614 |  |  |
Net Book Value | [2] | 724,482 |  | 738,614 |  |  |
Gross carrying amount [member] | Machinery [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 33,658 |  | 34,253 |  |  |
Accumulated depreciation |  | 33,658 |  | 34,253 |  |  |
Net Book Value |  | 33,658 |  | 34,253 |  |  |
Gross carrying amount [member] | Information Technology Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 161,992 |  | 160,936 |  |  |
Accumulated depreciation |  | 161,992 |  | 160,936 |  |  |
Net Book Value |  | 161,992 |  | 160,936 |  |  |
Gross carrying amount [member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 171,469 |  | 182,629 |  |  |
Accumulated depreciation |  | 171,469 |  | 182,629 |  |  |
Net Book Value |  | 171,469 |  | 182,629 |  |  |
Gross carrying amount [member] | Motor vehicles [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 67,060 |  | 69,653 |  |  |
Accumulated depreciation |  | 67,060 |  | 69,653 |  |  |
Net Book Value |  | 67,060 |  | 69,653 |  |  |
Gross carrying amount [member] | Leasehold improvements [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 234,249 |  | 211,322 |  |  |
Accumulated depreciation |  | 234,249 |  | 211,322 |  |  |
Net Book Value |  | 234,249 |  | 211,322 |  |  |
Gross carrying amount [member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 5,693,553 |  | 4,987,953 |  |  |
Accumulated depreciation |  | 5,693,553 |  | 4,987,953 |  |  |
Net Book Value |  | 5,693,553 |  | 4,987,953 |  |  |
Gross carrying amount [member] | OTHERS [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | 255,149 |  | 226,424 |  |  |
Accumulated depreciation |  | 255,149 |  | 226,424 |  |  |
Net Book Value |  | 255,149 |  | 226,424 |  |  |
Accumulated depreciation and amortisation [member] | Construction in progress [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value | [1] |  |  |  |  |  |
Accumulated depreciation | [1] |  |  |  |  |  |
Net Book Value | [1] |  |  |  |  |  |
Accumulated depreciation and amortisation [member] | Land [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  |  |  |  |  |  |
Accumulated depreciation |  |  |  |  |  |  |
Net Book Value |  |  |  |  |  |  |
Accumulated depreciation and amortisation [member] | Buildings [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (58,626) |  | (67,342) |  |  |
Accumulated depreciation |  | (58,626) |  | (67,342) |  |  |
Net Book Value |  | (58,626) |  | (67,342) |  |  |
Accumulated depreciation and amortisation [member] | Plant and Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (4,630,001) |  | (4,361,337) |  |  |
Accumulated depreciation |  | (4,630,001) |  | (4,361,337) |  |  |
Net Book Value |  | (4,630,001) |  | (4,361,337) |  |  |
Accumulated depreciation and amortisation [member] | Owned aircraft [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (4,421,211) |  | (4,096,975) |  |  |
Accumulated depreciation |  | (4,421,211) |  | (4,096,975) |  |  |
Net Book Value |  | (4,421,211) |  | (4,096,975) |  |  |
Accumulated depreciation and amortisation [member] | Others [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value | [2] | (208,790) |  | (264,362) |  |  |
Accumulated depreciation | [2] | (208,790) |  | (264,362) |  |  |
Net Book Value | [2] | (208,790) |  | (264,362) |  |  |
Accumulated depreciation and amortisation [member] | Machinery [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (28,441) |  | (27,659) |  |  |
Accumulated depreciation |  | (28,441) |  | (27,659) |  |  |
Net Book Value |  | (28,441) |  | (27,659) |  |  |
Accumulated depreciation and amortisation [member] | Information Technology Equipment [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (141,216) |  | (138,372) |  |  |
Accumulated depreciation |  | (141,216) |  | (138,372) |  |  |
Net Book Value |  | (141,216) |  | (138,372) |  |  |
Accumulated depreciation and amortisation [member] | Fixed Installations and Accessories [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (111,635) |  | (111,620) |  |  |
Accumulated depreciation |  | (111,635) |  | (111,620) |  |  |
Net Book Value |  | (111,635) |  | (111,620) |  |  |
Accumulated depreciation and amortisation [member] | Motor vehicles [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (60,327) |  | (60,531) |  |  |
Accumulated depreciation |  | (60,327) |  | (60,531) |  |  |
Net Book Value |  | (60,327) |  | (60,531) |  |  |
Accumulated depreciation and amortisation [member] | Leasehold improvements [member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (135,789) |  | (128,055) |  |  |
Accumulated depreciation |  | (135,789) |  | (128,055) |  |  |
Net Book Value |  | (135,789) |  | (128,055) |  |  |
Accumulated depreciation and amortisation [member] | Financial Leasing Aircraft [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (2,823,855) |  | (2,439,509) |  |  |
Accumulated depreciation |  | (2,823,855) |  | (2,439,509) |  |  |
Net Book Value |  | (2,823,855) |  | (2,439,509) |  |  |
Accumulated depreciation and amortisation [member] | OTHERS [Member] |  |  |  |  |  |  |
PROPERTY, PLANT AND EQUIPMENT (Details) - Schedule of composition of property, plant and equipment [Line Items] |  |  |  |  |  |  |
Gross Book Value |  | (153,991) |  | (134,314) |  |  |
Accumulated depreciation |  | (153,991) |  | (134,314) |  |  |
Net Book Value |  | $ (153,991) |  | $ (134,314) |  |  |
[1] | As of December 31, 2019, includes advances paid to aircraft manufacturers for ThUS$ 348,148 (ThUS$ 612,236 as of December 31, 2018)
[2] | Consider mainly rotables and tools.

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