Contacts:

ASUR

Lic. Adolfo Castro

+52-55-5284-0408 acastro@asur.com.mx

Breakstone Group

Susan Borinelli

+1-646-330-5907 sborinelli@breakstone-group.com

ASUR Announces Total Passenger Traffic for

December 2011 Up 15.3% Year over Year

Mexico City, January 4, 2012 - Grupo Aeroportuario del Sureste, S.A.B. de C.V. (NYSE: ASR; BMV: ASUR) (ASUR), today announced that total passenger traffic for December 2011 increased by 15.3% when compared to December 2010.

All figures in this announcement reflect comparisons between December 1 through

December 31, 2010 and 2011. Transit and general aviation passengers are excluded.

Airport

December

2010

Domestic

December

2011 % Change

Cancún 296,720 368,910 24.3
Cozumel 4,093 10,678 160.9
Huatulco 29,143 41,571 42.6
Mérida 92,633 109,611 18.3
Minatitlán 7,441 8,970 20.5
Oaxaca 31,542 35,239 11.7
Tapachula 13,127 14,059 7.1
Veracruz 60,465 64,859 7.3
Villahermosa 64,721 79,868 23.4

Total Domestic 599,885 733,765 22.3

International

Airport

December

2010

December

2011 % Change

Cancún 775,473 859,666 10.9
Cozumel 35,667 34,758 (2.5)
Huatulco 7,115 7,896 11.0
Mérida 10,606 9,490 (10.5)
Minatitlán 308 357 15.9
Oaxaca 3,682 4,236 15.0
Tapachula 270 467 73.0
Veracruz 5,907 9,276 57.0
Villahermosa 4,688 4,910 4.7

Total International 843,716 931,056 10.4

Airport December

2010

Total

December

2011

% Change

Cancún 1,072,193 1,228,576 14.6
Cozumel 39,760 45,436 14.3
Huatulco 36,258 49,467 36.4
Mérida 103,239 119,101 15.4
Minatitlán 7,749 9,327 20.4
Oaxaca 35,224 39,475 12.1
Tapachula 13,397 14,526 8.4
Veracruz 66,372 74,135 11.7
Villahermosa 69,409 84,778 22.1
ASUR Total 1,443,601 1,664,821 15.3

About ASUR:

Grupo Aeroportuario del Sureste, S.A.B. de C.V. (ASUR) is a Mexican airport operator with concessions to operate, maintain and develop the airports of Cancun, Merida, Cozumel, Villahermosa, Oaxaca, Veracruz, Huatulco, Tapachula and Minatitlan in the southeast of Mexico. The Company is listed both on the Mexican Bolsa, where it trades under the symbol ASUR, and on the NYSE in the U.S., where it trades under the symbol ASR. One ADS represents ten (10) series B shares.

- END -

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Passenger Traffic December 2011: 15.3% Increase YOY