Tucson International Airport (IATA: TUS, ICAO: KTUS, FAA LID: TUS) is a joint civil-military public airport located six miles (10 km) south of the central business district of Tucson, in Pima County, Arizona, United States, and is the second largest and busiest airport in Arizona, after Sky Harbor International Airport in Phoenix. Tucson International is owned and operated by the Tucson Airport Authority, which also operates Ryan Airfield. Currently, Tucson International Airport is not a hub or focus city for any major passenger airline. The airport recently completed a Concourse Renovation Project, the last phase of an extensive remodeling begun in 2000 that added 82,000 sq ft (7,600 m2) to ticketing and baggage claim. On March 19, 2008, the previous West/East concourses and gates were renumbered with the East Concourse becoming Concourse A: Gates A1 - A9, and the West Concourse becoming Concourse B: Gates B1 - B11. The international arrival area was relocated to the main terminal in Concourse A, whereas before it existed in a separate terminal. Public transportation to and from the airport is provided by Sun Tran bus routes #6 and #11.

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