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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
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.