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Consolidated Statements of Cash Flows
$ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Dec. 31, 2015
MXN ($)
Operating activities        
(Loss) income before income tax $ (38,296) $ (755,774) $ 4,976,671 $ 3,502,218
Non-cash adjustment to reconcile income before tax to net cash flows from operating activities:        
Depreciation and amortization 27,802 548,687 536,543 456,717
Provision for doubtful accounts 239 4,720 9,164 8,825
Finance income (5,361) (105,795) (102,591) (47,034)
Finance cost 4,376 86,357 35,116 21,703
Net foreign exchange differences 25,556 504,366 (1,054,333) (483,329)
Financial instruments 2,534 50,007 353,943 287,550
Net gain on disposal of rotable spare parts, furniture and equipment and gain on sale of aircraft (3,292) (64,978) (483,565) (180,433)
Employee benefits 236 4,657 3,122 2,549
Aircraft and engine lease extension benefit and other benefits from service agreements (5,096) (100,580) (82,178) (62,122)
Management incentive and long-term incentive plans 445 8,783 4,826 4,250
Cash flows from operating activities before changes in working capital 9,143 180,450 4,196,718 3,510,894
Changes in operating assets and liabilities:        
Related parties (1,221) (24,091) 50,706 13,749
Other accounts receivable 7,082 139,774 (157,370) (52,157)
Recoverable and prepaid taxes (22,243) (438,966) (361,377) 63,499
Inventories (2,582) (50,966) (80,811) (23,400)
Prepaid expenses 36,790 726,020 (1,027,040) (353,451)
Other assets 1,112 21,941 19,540 28,758
Guarantee deposits 2,910 57,425 (1,957,350) (1,164,911)
Suppliers 9,936 196,082 136,178 300,447
Accrued liabilities 14,690 289,920 499,584 272,555
Other taxes and fees payable 17,887 353,014 523,524 433,863
Unearned transportation revenue 409 8,069 196,313 536,319
Financial instruments 6,387 126,053 (450,902) (637,879)
Other liabilities 567 11,198 260,437 127,170
Cash flows from operating activities before interest received and income tax paid 80,867 1,595,923 1,848,150 3,055,456
Interest received 5,361 105,795 102,591 47,034
Income tax paid (36,272) (715,849) (972,009) (32,877)
Net cash flows provided by operating activities 49,956 985,869 978,732 3,069,613
Investing activities        
Acquisitions of rotable spare parts, furniture and equipment (127,778) (2,521,752) (2,198,697) (1,403,863)
Acquisitions of intangible assets (6,633) (130,908) (60,792) (52,228)
Pre-delivery payments reimbursements 10,841 213,947 1,733,093 669,718
Proceeds from disposals of rotable spare parts, furniture and equipment 9,033 178,273 498,438 185,096
Net cash flows used in investing activities (114,537) (2,260,440) (27,958) (601,277)
Financing activities        
Proceeds from exercised stock options 32 638 20,186 23,461
Treasury shares purchase (512) (10,108) (17,025)  
Interest paid (5,340) (105,388) (39,350) (41,538)
Other finance interest paid     (137,830) (40,113)
Payments of financial debt (46,864) (924,867) (1,531,460) (801,335)
Proceeds from financial debt 123,535 2,438,025 1,716,244 924,611
Net cash flows provided by financing activities 70,851 1,398,300 10,765 65,086
Increase in cash and cash equivalents 6,270 123,729 961,539 2,533,422
Net foreign exchange differences on cash balance (12,369) (244,101) 952,399 359,034
Cash and cash equivalents at beginning of year 358,303 7,071,251 5,157,313 2,264,857
Cash and cash equivalents at end of year $ 352,204 $ 6,950,879 $ 7,071,251 $ 5,157,313