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Guarantee deposits (Details)
$ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Dec. 31, 2019
MXN ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Current assets:        
Aircraft maintenance deposits paid to lessors   $ 576,505 $ 729,899 $ 1,317,663
Deposits for rental of flight equipment     1,220 17,178
Other guarantee deposits   23,822 59,516 18,052
Total $ 31,856 600,327 790,635 1,352,893
Non-current assets:        
Aircraft maintenance deposits paid to lessors   5,853,924 5,765,122 5,631,304
Deposits for rental of flight equipment   1,750,966 531,261 441,110
Other guarantee deposits   39,531 41,113 25,838
Total $ 405,643 7,644,421 6,337,496 6,098,252
Total guarantee deposits   $ 8,244,748 $ 7,128,131 $ 7,451,145