High Quality Content by WIKIPEDIA articles! Phoenix Sky Harbor International Airport (IATA: PHX, ICAO: KPHX, FAA LID: PHX) is located in the city of Phoenix and is the largest and busiest airport in the state of Arizona. Phoenix Sky Harbor International Airport is a joint civil-military public airport located 3 miles (4.8 km) east of the central business district of Phoenix, a city in Maricopa County, Arizona, United States. It is Arizona's main international airport and one of the largest aviation facilities in the American Southwest.