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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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The number of aircraft added to fleet.

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Financial assets and liabilities - Aircraft financing and Notes (Details) $ in Thousands		12 Months Ended
	Jun. 20, 2019 MXN ($) item	Dec. 31, 2020 MXN ($) aircraft	Dec. 31, 2019 MXN ($) aircraft	Dec. 31, 2018 MXN ($) aircraft
Aircraft financing
Number of aircraft incorporated to fleet \| aircraft		7	7	10
Notes issued	$ 1,500,000
Authorized amount under the program	$ 3,000,000
Maturity of notes	5 years
Financial liabilities		$ 5,354,633	$ 4,975,969	$ 3,523,198
Revolving line of credit
Aircraft financing
Basis points		2.60%	2.60%
Financial liabilities		$ 3,666,698
Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Number of notes issued \| item	15,000,000
Notes issued	$ 1,500,000
Authorized amount under the program	$ 3,000,000
Maturity of notes	5 years
Basis points	1.75%
Financial liabilities		$ 1,502,605
Short-term working capital facility with Banco Sabadell S.A.
Aircraft financing
Basis points		300.00%
Financial liabilities		$ 200,872
Within one year
Aircraft financing
Financial liabilities		1,566,106
Within one year \| Revolving line of credit
Aircraft financing
Financial liabilities		1,112,629
Within one year \| Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Financial liabilities		252,605
Within one year \| Short-term working capital facility with Banco Sabadell S.A.
Aircraft financing
Financial liabilities		200,872
Between one year and two years
Aircraft financing
Financial liabilities		3,054,069
Between one year and two years \| Revolving line of credit
Aircraft financing
Financial liabilities		2,554,069
Between one year and two years \| Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Financial liabilities		500,000
Between two and three years
Aircraft financing
Financial liabilities		500,000
Between two and three years \| Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Financial liabilities		500,000
Between three and four years
Aircraft financing
Financial liabilities		250,000
Between three and four years \| Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Financial liabilities		$ 250,000
28-day TIIE
Aircraft financing
Basis points			3.00%
Debt service coverage ratio prior computation period of debt service		6 months
Consecutive days for event of retention		90 days
Joint obligor as percentage of EBITDA		85.00%
28-day TIIE \| Asset backed trust notes ("CEBUR"), in Mexican pesos
Aircraft financing
Basis points		1.75%	1.75%
28-day TIIE \| Minimum
Aircraft financing
Debt service coverage ratio		2.50
28-day TIIE \| Maximum
Aircraft financing
Basis points		10.00%