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OTHER FINANCIAL LIABILITIES (Details) - Schedule of hedging operation - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Cross currency swaps (CCS) [Member] |  |  |
OTHER FINANCIAL LIABILITIES (Details) - Schedule of hedge derivatives [Line Items] |  |  |
Fair values of net assets/ (liabilities) | [1] | $ (22,662) | $ 15,099
Interest rate swaps [Member] |  |  |
OTHER FINANCIAL LIABILITIES (Details) - Schedule of hedge derivatives [Line Items] |  |  |
Fair values of net assets/ (liabilities) | [2] | 2,618 | (2,194)
Fuel options [Member] |  |  |
OTHER FINANCIAL LIABILITIES (Details) - Schedule of hedge derivatives [Line Items] |  |  |
Fair values of net assets/ (liabilities) | [3] | 48,542 | (15,811)
Currency options CLP/US$ |  |  |
OTHER FINANCIAL LIABILITIES (Details) - Schedule of hedge derivatives [Line Items] |  |  |
Fair values of net assets/ (liabilities) | [4] | $ (41) |
[1] | Covers the significant variations in cash flows associated with market risk implicit in the changes in the 3-month LIBOR interest rate and the exchange rate US$/UF of bank loans. These contracts are recorded as cash flow hedges and fair value.
[2] | Covers the significant variations in cash flows associated with market risk implicit in the increases in the 3 months LIBOR interest rates for long-term loans incurred in the acquisition of aircraft and bank loans. These contracts are recorded as cash flow hedges.
[3] | Covers significant variations in cash flows associated with market risk implicit in the changes in the price of future fuel purchases. These contracts are recorded as cash flow hedges.
[4] | They cover the exposure to foreign exchange risk of operating cash flows, mainly caused by the fluctuation of the CLP/US$, R$/US$, US$/EUR and US$/GBP exchange rate. These contracts are registered as cash flow hedge contracts.

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