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Guarantee deposits (Details)
$ in Thousands, $ in Thousands
Dec. 31, 2018
USD ($)
Dec. 31, 2018
MXN ($)
Dec. 31, 2017
MXN ($)
Dec. 31, 2016
MXN ($)
Current assets:        
Aircraft maintenance deposits paid to lessors   $ 729,899 $ 1,317,663 $ 1,145,913
Deposits for rental of flight equipment   1,220 17,178 14,155
Other guarantee deposits   59,516 18,052 7,141
Total $ 40,169 790,635 1,352,893 1,167,209
Non-current assets:        
Aircraft maintenance deposits paid to lessors   5,765,122 5,631,304 5,951,831
Deposits for rental of flight equipment   531,261 441,110 589,804
Other guarantee deposits   41,113 25,838 18,243
Total $ 321,980 6,337,496 6,098,252 6,559,878
Total guarantee deposits   $ 7,128,131 $ 7,451,145 $ 7,727,087