OMA reports July 2010 traffic

• Total passenger traffic grows 4.6%

Monterrey, Mexico, August 10, 2010—Mexican airport operator Grupo Aeroportuario del Centro Norte, S.A.B. de C.V., known as OMA (NASDAQ: OMAB; BMV: OMA), reports that terminal passenger traffic at its 13 airports increased 4.6% in July 2010, as compared to July 2009. Domestic traffic increased 2.2%, and international traffic rose 20.8%.

Of total traffic, 97.5% was commercial aviation, and 2.5% was general aviation.

Domestic traffic increased at eight airports. Growth at the Chihuahua, Tampico, Zacatecas, Acapulco, and Mazatlán airports was noteworthy. In Chihuahua, traffic grew on the routes to Mexico City (where Interjet and Click Mexicana opened routes) and Guadalajara. Tampico traffic grew on the routes to Monterrey and Mexico City. Traffic growth in Zacatecas was principally the result of increased traffic on the Tijuana route. In Acapulco, traffic increased on the routes to Mexico City (where Interjet opened a route) and Guadalajara. Mazatlán traffic grew on the routes to La Paz and Guadalajara. Traffic at the other five group airports decreased.

During the month of July, VivaAerobus opened the Monterrey-Tuxtla Gutierrez route, and Interjet opened the Zihuatanejo-Mexico City route.

International traffic increased at nine airports, with Monterrey, Zacatecas, San Luis Potosí, Acapulco, and Mazatlán showing noteworthy increases. Monterrey benefitted from an increase in traffic to Houston, principally because of the opening of new routes by VivaAerobus and Aeroméxico Connect. Zacatecas increased traffic on the route to Los Angeles. San Luis Potosí benefitted from an increase in passenger traffic to Dallas. Acapulco traffic increased on the Phoenix route, while Mazatlán traffic rose on the routes to Houston and Phoenix. International traffic decreased most in the Chihuahua and Torreón airports.

The total number of flight operations (takeoffs and landings) in the month increased 11.1% as compared to the prior year period. Domestic flights rose 8.3%, and international flights rose 34.9%.

This press release may contain forward-looking information and statements. Forward-looking statements are statements that are not historical facts. These statements are only predictions based on our current expectations and projections about future events. Forward-looking statements may be identified by the words “believe,” “expect,” “anticipate,” “target,” or similar expressions. While OMA's management believes that the expectations reflected in such forward-looking statements are reasonable, investors are cautioned that forwardlooking information and statements are subject to various risks and uncertainties, many of which are difficult to predict and are generally beyond the control of OMA, that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include, but are not limited to, those discussed in our most recent annual report filed on Form 20-F under the caption “Risk Factors.” OMA undertakes no obligation to publicly update its forward-looking statements, whether as a result of new information, future events, or otherwise.