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Financial risk management: (Tables)

12 Months Ended

Dec. 31, 2020

Financial risk management:

Schedule of exchange rate risk


		December 31,
		2019			2020
Monetary position:
Asset		Ps.	164,370		Ps.	88,426
Liability			(4,853)			(5,578)
		Ps.	159,517		Ps.	82,848

Schedule of liquidity position


December 31, 2019		Cash and equivalents			Total Debt			Debt term short			Debt term long
Mexico		Ps.	4,991,567		Ps.	3,992,467		Ps.	23,998		Ps.	3,968,469
Aerostar			698,466			6,799,941			311,372			6,488,569
Airplan			502,646			2,920,485			214,237			2,706,248
Total		Ps.	6,192,679		Ps.	13,712,893		Ps.	549,607		Ps.	13,163,286


December 31, 2020		Cash and equivalents			Total Debt			Debt term short			Debt term long
Mexico		Ps.	4,058,495		Ps.	3,971,210		Ps.	322,209		Ps.	3,649,001
Aerostar			804,634			7,171,278			529,337			6,641,941
Airplan			329,499			2,757,858			287,204			2,470,654
Total		Ps.	5,192,628		Ps.	13,900,346		Ps.	1,138,750		Ps.	12,761,596

Schedule of liquidity risk

Under

Between 3 months

Between 1

Between 2 and

At December 31, 2019

3 months

and one year

and 2 years

5 years

Bank loans and interest

Ps.

14,639

Ps.

223,596

Ps.

228,073

Ps.

6,446,644

Long term debt

111,676

199,696

204,492

6,284,077

Suppliers

245,100

Accounts payable and accrued expenses

1,378,657



At December 31, 2020
Bank loans and interest		Ps.	11,176		Ps.	797,339		Ps.	2,238,558		Ps.	3,881,097
Long term debt			114,420			215,815			233,123			6,408,818
Suppliers			353,806
Accounts payable and accrued expenses			1,187,345

Schedule of short term liquidity


		December 31,
		2019			2020

Current assets		Ps.	7,845,856		Ps.	7,716,049
Current liabilities			2,560,020			2,767,087

Short term position (liquidity)		Ps.	5,285,836		Ps.	4,948,962