**Exhibit 8.1**

 

List of Material Subsidiaries of Grupo Aeroportuario del Sureste, S.A.B. de C.V.

 
| **Subsidiary**                                            | ** ** | **Ownership Interest** | ** ** | **Place of Organization** | ** ** |
|-----------------------------------------------------------|------------|-----------------------------|------------|-------------------------------------|------------|
| Aeropuerto de   Cancún, S.A. de C.V.                 |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Cozumel, S.A. de C.V. (1)                 |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Mérida, S.A. de C.V.                 |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Huatulco, S.A. de C.V. (2)                |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Oaxaca, S.A. de C.V.                      |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Veracruz, S.A. de C.V. (3)                |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Villahermosa, S.A. de C.V.                |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Tapachula, S.A. de C.V. (4)               |       | 100                         | %          | Mexico                              |       |
| Aeropuerto de   Minatitlán, S.A. de C.V. (5)         |       | 100                         | %          | Mexico                              |       |
| Aerostar Airport   Holdings, LLC (6)                      |       | 60                          | %          | Commonwealth of Puerto   Rico       |       |
| Sociedad   Operadora de Aeropuertos Centro Norte, S.A.(7) |       | 92.42                       | %          | Colombia                            |       |
| Servicios   Aeroportuarios del Sureste, S.A. de C.V.      |       | 100                         | %          | Mexico                              |       |
| RH Asur, S.A. de   C.V.                                   |       | 100                         | %          | Mexico                              |       |

 

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(1)         As of December 31, 2017, Aeropuerto de Cancún, S.A. de C.V., has an 18.1% equity participation in this airport.

 

(2)         As of December 31, 2017, Aeropuerto de Cancún, S.A. de C.V., has a 21.6% equity participation in this airport.

 

(3)         As of December 31. 2017, Aeropuerto de Cancún, S.A. de C.V., has a 30.0% equity participation in this airport, in accordance with the increase in capital stock in October 2014.

 

(4)         As of December 31. 2017, Aeropuerto de Cancún, S.A. de C.V., has a 30.0% equity participation in this airport.

 

(5)         As of December 31, 2017, Aeropuerto de Cancún, S.A. de C.V., has a 23.4% equity participation in this airport.

 

(6)         As of June 1, 2017, Aeropuerto de Cancún, S.A. de C.V, has a 60.0% equity participation in this entity.  On June 1, 2017, we began to consolidate Aerostar results into our financial statements.

 

(7)         As of October 19, 2017, Aeropuerto de Cancún, S.A. de C.V., has a 92.42% equity participation in this entity.  On October 19, 2017, we began to consolidate Airplan results into our financial statements.

 

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