Ryan Airfield is a general aviation reliever airport located 12 miles west of Tucson International Airport at the intersection of Ajo Way and Valencia Road. The field was created in the 1940s as a training camp for the Army Air Corps.

After the war, the state of Arizona approached the Tucson Airport Authority, who also manages Tucson International, about operating the airfield. The Authority and the state entered into a long-term lease agreement and over the years Ryan Airfield has become a busy and popular airfield.