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Income tax - Tax loss carry-forward (Details) - MXN ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Available tax loss carry-forward |  |  |
Historical Loss | $ 2,084,960 |  |
Restated tax loss | 2,238,306 |  |
Utilized | 296,242 |  |
Total remaining amount | 1,942,064 |  |
Unrecognized NOLs | 20,657 |  |
Net remaining amount | $ 1,921,407 |  |
Statutory income tax rate | 30.00% | 30.00% | 30.00%
Deferred income tax | $ 15,768,220 | $ 14,511,827 |
Tax balances |  |  |
Adjusted contributed capital account (CUCA) | 4,607,752 |  |
CUFIN | 3,241,275 |  |
Tax losses available for offsetting against future taxable income |  |  |
Available tax loss carry-forward |  |  |
Deferred income tax | 576,422 | $ 303,970 | $ 309,320
Comercializadora Volaris, S.A. de C.V. |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 42,777 |  |
Restated tax loss | 43,685 |  |
Total remaining amount | 43,685 |  |
Concesionaria |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 1,875,180 |  |
Restated tax loss | 2,027,302 |  |
Utilized | 217,393 |  |
Total remaining amount | 1,809,909 |  |
Operaciones Volaris |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 18,648 |  |
Restated tax loss | 18,965 |  |
Total remaining amount | 18,965 |  |
Vuela, S.A. |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 148,355 |  |
Restated tax loss | 148,354 |  |
Utilized | 78,849 |  |
Total remaining amount | 69,505 |  |
2017, Expiration 2027 |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 1,067,836 |  |
Restated tax loss | 1,206,232 |  |
Utilized | 217,393 |  |
Total remaining amount | 988,839 |  |
2018, Expiration 2021 |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 92,604 |  |
Restated tax loss | 92,604 |  |
Utilized | 78,849 |  |
Total remaining amount | 13,755 |  |
2019, Expiration 2029 |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 4,922 |  |
Restated tax loss | 5,186 |  |
Total remaining amount | 5,186 |  |
2020, Expiration 2030 |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 863,847 |  |
Restated tax loss | 878,533 |  |
Total remaining amount | 878,533 |  |
2020, Expiration 2023 |  |  |
Available tax loss carry-forward |  |  |
Historical Loss | 55,751 |  |
Restated tax loss | 55,751 |  |
Total remaining amount | $ 55,751 |  |

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