US Airways (Phoenix) is joining a growing list of carriers cutting service to Mexican cities. US is temporarily reducing flights to the following cities between May 10 and July 1: Acapulco, Cabo (Los Cabos), Cancun, Cozumel, Guadalajara, Guaymas, Hermosillo, Ixtapa/Zihuatanejo, Manzanillo, Mazatlan, Mexico City and Puerto Vallarta. This amounts to a reduction of 38 percent.