COSTS AND EXPENSES BY NATURE (Tables)

12 Months Ended

Dec. 31, 2018

Material income and expense [abstract]

Schedule of operating costs and administrative expenses

The main operating costs and administrative expenses are detailed below:

	For the year ended
	December 31,
	2018		2017		2016
	ThUS$		ThUS$		ThUS$
Aircraft fuel		2,983,028		2,318,816		2,056,643
Other rentals and landing fees		1,217,647		1,172,129		1,077,407
Aircraft rentals		538,347		579,551		568,979
Aircraft maintenance		382,242		430,825		366,153
Comissions		222,506		252,474		269,296
Passenger services		280,279		288,662		286,621
Other operating expenses		1,237,430		1,381,546		1,424,595
Total		6,861,479		6,424,003		6,049,694

Schedule of depreciation and amortisation expense

Depreciation and amortization

Depreciation and amortization are detailed below:

	For the year ended
	December 31,
	2018		2017		2016
	ThUS$		ThUS$		ThUS$
Depreciation (*)		916,050		943,215		910,071
Amortization		65,596		58,410		50,257
Total		981,646		1,001,625		960,328

(*) Include the depreciation of Property, plant and equipment and the maintenance cost of aircraft held under operating leases. The amount of maintenance cost included within the depreciation line item at December 31, 2018 is ThUS$ 366,393, ThUS$ 359,940 and ThUS$ 345,651 for the same period of 2017 and 2016 respectavely.

Schedule of finance costs

Financial costs

The detail of financial costs is as follows:

	For the year ended
	December 31,
	2018		2017		2016
	ThUS$		ThUS$		ThUS$
Bank loan interest		283,786		347,551		352,405
Financial leases		62,202		37,522		32,573
Other financial instruments		10,281		8,213		31,358
Total		356,269		393,286		416,336