The main operating costs and administrative expenses are detailed below:
| For the periods ended | ||||||||||||
| December 31, | ||||||||||||
| 2017 | 2016 | 2015 | ||||||||||
| ThUS$ | ThUS$ | ThUS$ | ||||||||||
| Aircraft fuel | 2,318,816 | 2,056,643 | 2,651,067 | |||||||||
| Other rentals and landing fees | 1,172,129 | 1,077,407 | 1,109,826 | |||||||||
| Aircraft rentals | 579,551 | 568,979 | 525,134 | |||||||||
| Aircraft maintenance | 430,825 | 366,153 | 437,235 | |||||||||
| Comissions | 252,474 | 269,296 | 302,774 | |||||||||
| Passenger services | 288,662 | 286,621 | 295,439 | |||||||||
| Other operating expenses | 1,381,546 | 1,424,595 | 1,293,320 | |||||||||
| Total | 6,424,003 | 6,049,694 | 6,614,795 | |||||||||