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Balances and transactions with related parties: (Tables) | 12 Months Ended
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Dec. 31, 2019
Balances and transactions with related parties: |
Schedule of balances receivable and payable |
|  | December 31,
|  | 2018 |  | 2019
Accounts receivable: |  |  |  |  |  |
Autobuses de Oriente ADO, S. A. de C. V. (Shareholder/services) |  | Ps. | 538 |  |  |
Autobuses Golfo Pacífico, S. A. de C. V. (Shareholder/services) |  |  | 271 |  | Ps. | 284
|  | Ps. | 809 |  | Ps. | 284
Accounts payable and accumulated expenses (Note 10):(*) |  |  |  |  |  |
Inversiones y Técnicas Aeroportuarias, S. A. de C. V. |  |  |  |  |  |
(Shareholder/technical assistance) |  | Ps. | (96,643) |  | Ps. | (96,769)
Sociedad Operadora Airplan, S. A. |  |  |  |  |  |
(Shareholder/technical assistance) |  |  |  |  |  |
Lava Tap de Chiapas, S. A. de C. V. |  |  |  |  |  |
(Key Management personnel/services) |  |  | (689) |  |  | (543)
|  |  | (97,332) |  |  | (97,312)
Net |  |  |  |  |  |
|  | Ps. | (96,523) |  | Ps. | (97,028)
(*) These are accounts with terms of less than one year under similar market conditions.
Schedule of transactions with related parties |
|  | December 31,
|  | 2017 |  | 2018 |  | 2019
Commercial income: |  |  |  |  |  |  |  |  |
Autobuses de Oriente, S. A. de C. V. (Stockholder) |  | Ps. | 11,770 |  | Ps. | 14,455 |  | Ps. | 14,349
Autobuses Golfo Pacífico, S. A. de C. V. (Stockholder) |  |  | 6,382 |  |  | 7,014 |  |  | 7,290
Coordinados de México de Oriente, S. A. de C. V. (Stockholder) |  |  | 139 |  |  | 150 |  |  | 157
Interest income: |  |  |  |  |  |  |  |  |
Aerostar (joint venture) |  | Ps. | 69,202 |  |  |  |  |  |
Expenses: |  |  |  |  |  |  |  |  |
Stockholders: |  |  |  |  |  |  |  |  |
Technical assistance (Note 15.4) |  | Ps. | (346,487) |  | Ps. | (386,249) |  | Ps. | (404,086)
Related parties: |  |  |  |  |  |  |  |  |
Administrative services |  |  |  |  |  |  |  |  |
Leasing |  | Ps. | (5,019) |  | Ps. | (5,232) |  | Ps. | (5,340)
Cleaning services |  |  | (10,239) |  |  | (10,854) |  |  | (11,544)
Other |  |  | (598) |  |  |  |  |  |
Schedule of compensation of key personnel |
|  | December 31,
|  | 2017 |  | 2018 |  | 2019
Short term salaries and other benefits paid to key personnel (Note 18.17) (*) |  | Ps. | 84,642 |  | Ps. | 119,202 |  | Ps. | 109,747
Fees paid to the Board of Directors and Committees |  |  | 4,974 |  |  | 8,695 |  |  | 9,146
(*) In 2017, 2018 and 2019, includes costs of Ps.34,879 , Ps.53,268 and Ps.41,411; and Ps.3,268, Ps.16,350 and Ps.17,381, respectively for key personnel of directors of Aerostar and Airplan, whose results as of June 1, 2017 and October 19, 2017, respectively, were consolidated into the Company’s financial statements.

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