Delta Airlines Phoenix-Mesa Gateway Airport does not currently operate flights to or from Phoenix-Mesa Gateway Airport (AZA) in Mesa, Arizona. Instead, Delta serves the Phoenix metropolitan area through Phoenix Sky Harbor International Airport (PHX), located approximately 28 miles northwest of Mesa. At Sky Harbor, Delta primarily operates out of Terminal 3, offering a wide range of domestic and international flights. Meanwhile, Phoenix-Mesa Gateway Airport is predominantly used by low-cost carriers, with Allegiant Air as one of its primary operators. Travelers in the Phoenix area should confirm their departure or arrival airport to ensure a smooth journey, as the region is served by multiple airports with distinct airline operations.