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v3.19.1

Description of the business and summary of significant accounting policies - Aircraft, rotable spare parts, furniture and equipment, net (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2018 agreement | Dec. 31, 2018 engine | Dec. 31, 2018 aircraft | Dec. 31, 2018 | Dec. 31, 2018 MXN ($) | Dec. 31, 2017 agreement | Dec. 31, 2017 engine | Dec. 31, 2017 aircraft | Dec. 31, 2017 | Dec. 31, 2017 MXN ($) | Dec. 31, 2016 agreement | Dec. 31, 2016 aircraft | Dec. 31, 2016 | Dec. 31, 2016 MXN ($)
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maintenance deposits expensed as supplemental rent |  |  |  |  |  | $ 87,019 |  |  |  |  | $ 103,648 |  |  |  | $ 143,923
Number of aircraft added to fleet | aircraft |  |  |  | 10 |  |  |  |  | 5 |  |  |  | 17 |  |
Maintenance adjustment payments expensed as contingent rent |  |  |  |  |  | 212,582 |  |  |  |  | 162,108 |  |  |  | 201,434
Number of aircraft with lease term extended |  | 2 |  | 2 |  |  | 3 |  | 3 |  |  | 2 | 2 |  |
Number of engine agreements for which lease term extended | engine |  |  | 2 |  |  |  |  | 2 |  |  |  |  |  |  |
Maintenance deposits expensed to contingent rent prior to lease extensions |  |  |  |  |  | 0 |  |  |  |  | 65,716 |  |  |  | 92,528
Amortization of lease incentives |  |  |  |  |  | 84,637 |  |  |  |  | 88,224 |  |  |  | 74,748
Length of time before routine aircraft and engine maintenance is required | 22 months |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 2,693,397 |  |  |  |  | 2,584,232 |  |  |  | 2,198,697
Depreciation |  |  |  |  |  | 427,756 |  |  |  |  | 496,291 |  |  |  | 496,253
Capitalized borrowing costs |  |  |  |  |  | 357,920 |  |  |  |  | 193,389 |  |  |  | 95,445
Rate used to determine amount of borrowing cost |  |  |  |  | 4.41% |  |  |  |  | 3.30% |  |  |  | 2.88% |
Aircraft parts and rotable spare parts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 106,240 |  |  |  |  | 115,173 |  |  |  | 110,592
Depreciation |  |  |  |  |  | 54,320 |  |  |  |  | 44,409 |  |  |  | 33,430
Aircraft spare engines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 260,131 |  |  |  |  | 385 |  |  |  | 323,025
Depreciation |  |  |  |  |  | 16,785 |  |  |  |  | 16,795 |  |  |  | 1,337
Standardization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 10,803 |  |  |  |  | 15,833 |  |  |  | 21,953
Depreciation |  |  |  |  |  | 13,729 |  |  |  |  | 18,543 |  |  |  | 23,728
Annual depreciation rate | Remaining contractual lease term |  |  |  |  |  |  |  |  |  |  |  |  |  |
Computer equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 5,316 |  |  |  |  | 1,845 |  |  |  | 740
Depreciation |  |  |  |  |  | 7,215 |  |  |  |  | 3,809 |  |  |  | 2,549
Annual depreciation rate |  |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |
Communications equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 1,050 |  |  |  |  |  |  |  |  | 129
Depreciation |  |  |  |  |  | 892 |  |  |  |  | 796 |  |  |  | 831
Annual depreciation rate |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Office furniture and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 652 |  |  |  |  | 6,805 |  |  |  | 517
Depreciation |  |  |  |  |  | 6,209 |  |  |  |  | 3,801 |  |  |  | 3,559
Annual depreciation rate |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Electric power equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,467
Depreciation |  |  |  |  |  | 1,132 |  |  |  |  | 1,294 |  |  |  | 1,946
Annual depreciation rate |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Workshop machinery and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 1,040 |  |  |  |  | 123 |  |  |  | 131
Depreciation |  |  |  |  |  | 727 |  |  |  |  | 722 |  |  |  | 692
Annual depreciation rate |  |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |
Service carts on board |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 36
Depreciation |  |  |  |  |  | 256 |  |  |  |  | 376 |  |  |  | 731
Annual depreciation rate |  |  |  |  | 20.00% |  |  |  |  |  |  |  |  |  |
Leasehold improvements to flight equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additions |  |  |  |  |  | 676,457 |  |  |  |  | 529,331 |  |  |  | 226,526
Depreciation |  |  |  |  |  | 313,464 |  |  |  |  | 382,745 |  |  |  | 404,659
Annual depreciation rate | The shorter of: (i) remaining contractual lease term, or (ii) the next major maintenance event |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rotable spare parts, furniture and equipment assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Impairment charges on rotable spare parts, furniture and equipment |  |  |  |  |  | $ 0 |  |  |  |  | $ 0 |  |  |  | $ 0
Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Duration of routine aircraft and engine maintenance | 7 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Length of time before major aircraft and engine maintenance is required | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum | Aircraft parts and rotable spare parts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual depreciation rate |  |  |  |  | 8.30% |  |  |  |  |  |  |  |  |  |
Minimum | Aircraft spare engines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual depreciation rate |  |  |  |  | 4.00% |  |  |  |  |  |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Duration of routine aircraft and engine maintenance | 14 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Duration of major aircraft and engine maintenance | 42 days |  |  |  |  |  |  |  |  |  |  |  |  |  |
Length of time before major aircraft and engine maintenance is required | 6 years |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum | Aircraft parts and rotable spare parts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual depreciation rate |  |  |  |  | 16.70% |  |  |  |  |  |  |  |  |  |
Maximum | Aircraft spare engines |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Annual depreciation rate |  |  |  |  | 8.30% |  |  |  |  |  |  |  |  |  |

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