Grupo Aeroportuario del Centro Norte, reports that terminal passenger traffic at its 13 airports increased 4.9% in May compared to the prior year period. Domestic traffic increased 4.6% and international traffic increased 6.7%. Of total May traffic, 97.5% was commercial aviation and 2.5% was general aviation. The number of flight operations in May decreased 4.7% as compared to the same month of last year. The number of domestic operations decreased 5.2% and international operations decreased 1.1%.