OTHER FINANCIAL LIABILITIES (Details 5) - USD ($) $ in Thousands		Dec. 31, 2018	Dec. 31, 2017
Cross currency swaps (CCS) [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Fair values of net assets/ (liabilities)	[1]	$ 15,099	$ 38,875
Interest rate swaps [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Fair values of net assets/ (liabilities)	[2]	(2,194)	(6,542)
Fuel options [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Fair values of net assets/ (liabilities)	[3]	(15,811)	10,711
Currency options R$/US$ [Member]
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Fair values of net assets/ (liabilities)	[4]		4,370
Currency options CLP/US$
Disclosure of information about terms and conditions of hedging instruments and how they affect future cash flows [line items]
Fair values of net assets/ (liabilities)	[4]		$ 636

[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] Covers the foreign exchange risk exposure of operating cash flows caused mainly by fluctuations in the exchange rate CLP/US$, R$/US$, US$/EUR and US$/GBP. These contracts are recorded as cash flow hedges.