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Related parties - Transactions with related parties (Details) - MXN ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Related parties      
Aircraft and engine maintenance $ 249,266 $ 304,399 $ 111,641
Call center fees and other fees 202,689 173,197 57,809
Other $ 8,088 $ 8,105 $ 2,516