Ontario International Airport is an international airport two miles east of downtown Ontario, in San Bernardino County, California, United States, about 38 mi (61 km) east of downtown Los Angeles and 18 mi (29 km) west of downtown San Bernardino. It is owned and operated under a joint-powers agreement with the city of Ontario and San Bernardino County.

Bonanza Air Lines was a local service carrier as defined by the federal Civil Aeronautics Board) in the Western United States from 1945 until it merged with two other local service airlines to form Air West in 1968. Its headquarters was initially Las Vegas, Nevada, and moved to Phoenix, Arizona in 1966.