In 1949, an Air National Guard training station was established at the former Ontario Army Air Field, renamed Ontario International Airport. In April 1949, the City of Ontario granted a lease for certain airport property to the U.S. Air Force, said site to be used by the California Air National Guard. An armory for the 149th Aircraft Control and Warning Squadron was constructed and later CA ANG activities had a major impact on the airport. In 1952, in response to the desire of the Air National Guard to base fighter aircraft at the airport, the city initiated the first of the three runway extensions. After two additional runway extensions, the airport had a 10,000 foot runway to service both commercial and military traffic.
The 1950s saw dynamic growth at Ontario International Airport (the airfield was designated "International" in 1946), with three major aircraft plants, including Lockheed, Douglas and Northrop, having facilities at the airport.A second runway extension of 1,200 feet was completed in 1956 and permitted the CA ANG's speedy F-86 Sabres to land and take off at Ontario. The first extension (800 ft) came in 1952, and the third (1,800 ft) in 1962, each time to accommodate the faster aircraft being flown by what was by now the 163d Fighter Group of the California Air National Guard. All three runway extensions were funded by the Air National Guard as military construction (MILCON). The 163 FG flew F-86F aircraft from Ontario from 1956 to 1959, and F-86H aircraft from 1959 to 1965. In 1965, the unit transitioned to the F-102 Delta Dagger and in 1968 was renamed the 163d Fighter-Interceptor Group (163 FIG). Operationally-gained by the Aerospace Defense Command (ADC), the 163d continued to fill what was primarily a coastal air defense role for southern California, Nevada and Arizona. In 1975, the unit transitioned to the O-2 Skymaster forward air control aircraft and was redesignated as the 163d Tactical Air Support Group (160 TASG), with operationally claimancy transferred from ADC to Tactical Air Command (TAC).In 1982, in preparation for transition to the F-4 Phantom II and return to its earlier designation as the 163d Fighter Group, the 163 TASG transferred to March AFB in nearby Riverside. Non-flying CA ANG operations continued at the site with the 148th Combat Communications Squadron until 1997, when Ontario ANGS was closed due to BRAC action and the 148th transferred to the renamed March ARB. California Air National Guard 196th Fighter Interceptor Squadron Convair F-102A-90-CO Delta Dagger, AF Ser. No. 57-775, in 1970. This aircraft is now on static display at Clovis Park, California. See also California World War II Army Airfields 36th Flying Training Wing (World War II)