Phoenix–Mesa Gateway Airport
Phoenix–Mesa Gateway Airport (IATA: AZA, ICAO: KIWA, FAA LID: IWA), formerly Williams Gateway Airport (1994–2008) and Williams Air Force Base (1941–1993), is in the southeastern area of Mesa, Arizona, and 20 miles (32 km) southeast of Phoenix, in Maricopa County, Arizona. The airport is owned and operated by the Phoenix–Mesa Gateway Airport Authority, and is a reliever airport for Phoenix Sky Harbor International Airport. It is a focus city for Allegiant Air. The airport authority is governed by a six-member board: the mayors and tribal governor of the town of Gilbert, city of Mesa, town of Queen Creek, Gila River Indian Community, city of Phoenix, and the city of Apache Junction.
The FAA's National Plan of Integrated Airport Systems for 2007–2011 called Phoenix–Mesa Gateway a reliever airport, which is a general aviation airport used to relieve congestion at a large airline airport.Allegiant Air began scheduled service from Mesa in October 2007. Phoenix Mesa Gateway Airport records say the airport had 1,242,237 passenger boardings (or approx. 621,000 enplanements) in calendar year 2014.