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COSTS AND EXPENSES BY NATURE (Tables) | 12 Months Ended
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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 |

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