OMA reports April 2010 Traffic

Monterrey, Mexico, May 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 decreased 5.5% in April 2010, as compared to April 2009. Domestic traffic decreased 6.0%, and international traffic decreased 2.7%.

Of total traffic, 96.6% was commercial aviation, and 3.4% was general aviation.

Domestic traffic grew at three airports: Chihuahua benefitted principally from growth in traffic to Guadalajara; Reynosa from growth on the Veracruz route; and San Luis Potosí from growth on the Monterrey route. VivaAerobus opened five new routes out of Monterrey, to Ciudad Obregón, Los Mochis, Morelia, Mexicali, and Mexico City.

Domestic traffic decreased at the other airports. Mexico City traffic decreased at the Acapulco, Monterrey, Tampico, Zihuatanejo, Torreón, and Durango airports. Ciudad Juárez traffic to Monterrey decreased. Culiacán was affected by reductions on the Tijuana and San José del Cabo routes; Zacatecas on the Tijuana route; and Mazatlán on the Toluca route.

International traffic at four airports recorded growth. Mazatlán traffic grew principally on the routes to Phoenix and Calgary; San Luis Potosí increased traffic on the Dallas route; Durango traffic to Houston rose; and Zacatecas increased traffic on the Los Angeles route.

Traffic decreased principally at the Acapulco, Monterrey, and Zihuatanejo airports. The first two were most affected by reductions on the routes to Houston, while the third was affected by a reduction in charter traffic.

The total number of flight operations (takeoffs and landings) in the month increased 6.2% as compared to the prior year period.

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.