20 Military airbases in Ontario

Royal Canadian Air Force Detachment Alliston was opened in July 1940 near the village of Alliston, Ontario, this small aerodrome served as the No. 2 Relief Landing Field for No. 1 Service Flying Training School of the British Commonwealth Air Training Plan, located at RCAF Station Camp Borden. The airfield at RCAF Detachment Alliston consisted of three runways in a standard triangular pattern, but unlike the RCAF Detachment Edenvale, they were compressed grass runways and there were no lights for night landings. The airfield was abandoned at the end of World War II and the land was sold for farmland.

RCAF Station Aylmer was a Royal Canadian Air Force airfield that was built between late 1940 and June 1941 northeast of Aylmer, Ontario. It was one of many built across Canada under the British Commonwealth Air Training Plan during World War II.

Canadian Forces Base Borden, formerly RCAF Station Borden, is a Canadian Forces base located in Ontario. The historic birthplace of the Royal Canadian Air Force, CFB Borden is home to the largest training wing in the Canadian Armed Forces. The base is run by Canadian Forces Support Training Group (CFSTG) and reports to the Canadian Defence Academy (CDA) in Kingston.

RCAF Station Centralia was a Royal Canadian Air Force training base located just outside the village of Centralia near Exeter, Ontario, Canada. It became one of the largest training stations in Canada.

Canadian Forces Detachment Mountain View, also CFD Mountain View, is a Canadian Forces airfield located in Prince Edward County, Ontario, south of Belleville. It is geographically close to CFB Trenton, which has administrative responsibility for the facilities.

Royal Canadian Air Force Station Dunnville was a Second World War British Commonwealth Air Training Plan (BCATP) station located near Dunnville, Ontario. The station was home to No. 6 Service Flying Training School and is usually known by that name. Service Flying Training schools trained Pilots, either single engine or multi-engine, and 6 SFTS was a single engine school. After graduation the new pilots were assigned various duties, which might be overseas in the Royal Air Force or an RCAF squadron; or in Canada as instructors or staff pilots in the BCATP, or for duty in RCAF Home Defence squadrons.

Edenvale Airport is located 2.8 nautical miles west of Edenvale, Ontario, Canada.

RCAF Detachment Gananoque was a relief landing field for the Royal Air Force's No. 31 Service Flying Training School (SFTS) located at RCAF Station Kingston during the Second World War. The airfield was located north of Gananoque, Ontario, Canada. Gananoque consisted of a triangle-shaped runway pattern, one hangar, and a control tower. Gananoque officially became a British Commonwealth Air Training Plan (BCATP) facility in 1942 when RAF training schools became part of the BCATP. The station opened in 1940 and closed in 1945.

RCAF Detachment Grand Bend, located near Grand Bend, Ontario, was built in 1942 as part of the British Commonwealth Air Training Plan. It was the primary relief aerodrome ("R1") for student pilots training with No. 9 Service Flying Training School at RCAF Station Centralia. Grand Bend was home to No. 1 Flying Control School from 1951–1957. The station was used by Centralia until 1961 when it began use with Canadian Army. It was given back to the RCAF in 1962 and was used by RCAF Station Centralia until the aerodrome closed in 1963. Subsequent owners of the property were Eagleson Construction, John Twynsta Holdings Ltd, POG Ltd and the Grand Bend Motorplex.

RCAF Station Hamilton was an air force base of the Royal Canadian Air Force located in Mount Hope, Ontario, Canada, 15 mi (24 km) south of Hamilton.

Niagara Central Dorothy Rungeling Airport or Welland/Niagara Central Dorothy Rungeling Aerodrome,, is a registered aerodrome located 3.5 nautical miles west of Welland, Ontario, Canada. Niagara Central accommodates a flight school, skydivers, aerial photographers, itinerant light aircraft and an automatic weather station. It was built in 1940 by the Royal Canadian Air Force as part of the British Commonwealth Air Training Plan and served as the relief airfield for the No. 6 Service Flying Training School in nearby Dunnville.

RCAF Station Oshawa was a training station of the British Commonwealth Air Training Plan (BCATP) during World War II located near Oshawa, Ontario, Canada.

Pendleton Airport,, is located 3 nautical miles northwest of Pendleton, Ontario, Canada, east of Ottawa. The airfield is currently operated by the Gatineau Gliding Club.

Petawawa Heliport,, is located 3.5 nautical miles northwest of Petawawa, Ontario Canada. It is mostly used as a heliport for CH-146 helicopters from Garrison Petawawa.

RCAF Station Port Albert was a Second World War, Royal Canadian Air Force station located near Port Albert, Ontario, Canada in the Ashfield–Colborne–Wawanosh township. The station was home to the Royal Air Force's No. 31 Air Navigation School.

St. Thomas Municipal Airport,, located 3.5 nautical miles east of St. Thomas, Ontario, Canada is a small airport serving the general aviation needs of the area. The airport was established in 1941 as an air training base for the British Commonwealth Air Training Program. The base was operated by the Department of National Defence until the late 1940s as a relief field for No. 14 Service Flying Training School Aylmer, Ontario and No. 4 Bombing & Gunnery School Fingal, Ontario. It has a six runways, and four IFR approaches.

Thunder Bay International Airport,, is an airport in the city of Thunder Bay, Ontario, Canada. With 108,130 aircraft movements in 2012, it was the fourth busiest airport in Ontario and the 16th busiest airport in Canada. During the same year, more than 761,000 passengers went through the airport.

Lester B. Pearson International Airport, branded as Toronto Pearson International Airport, is the primary international airport serving Toronto, its metropolitan area, and its surrounding region known as the Golden Horseshoe. It is the largest and busiest airport in Canada, the second-busiest international air passenger gateway in the Americas, and the 30th-busiest airport in the world by passenger traffic, handling 50.5 million passengers in 2019. The airport is named in honour of Lester B. Pearson, Nobel Peace Prize laureate and 14th Prime Minister of Canada.

Canadian Forces Base Trenton, formerly RCAF Station Trenton, is a Canadian Forces base located within the city of Quinte West, Ontario. It is operated as an air force base by the Royal Canadian Air Force (RCAF) and is the hub for air transport operations in Canada and abroad. Its primary RCAF lodger unit is 8 Wing, commonly referred to as 8 Wing Trenton. CFB Trenton is Canada's largest Air Force base.

Tyendinaga (Mohawk) Airport is a registered aerodrome that is open to the public and caters mainly to general aviation. The aerodrome is located in Tyendinaga Mohawk Territory, 3 nautical miles southwest of Tyendinaga, Ontario, Canada, north of the Bay of Quinte between Kingston and Belleville.