USAAF use
In November 1943 Langar was transferred to the USAAF Ninth Air Force as a troop carrier group base. Langar was known as USAAF Station AAF-490 for security reasons by the USAAF during the war, and by which it was referred to instead of location. Its USAAF Station Code was "LA".
438th Troop Carrier Group
Langar remained vacant for about a month until the 438th Troop Carrier Group arrived in early February 1944 from Baer AAF, Indiana. Operational squadrons of the group were:
- 87th Troop Carrier Squadron (3X)
- 88th Troop Carrier Squadron (M2)
- 89th Troop Carrier Squadron (4U)
- 90th Troop Carrier Squadron (Q7)
The 438th TCW was assigned to the 53rd Troop Carrier Wing. Like its predecessor, the group was moved south after a month to a new station at RAF Greenham Common.
Post D-Day use
In October 1944, RAF Bomber Command returned to Langar moving in with No. 1669 Heavy Conversion Unit RAF with 32 Lancasters which used the station until March 1945. Although retained by the Air Ministry. The airfield was used after the war for a short time for prisoners of war and then for displaced persons. Early in 1952 it was taken over by the Royal Canadian Air Force (RCAF) to become a supply station be for their NATO squadrons. The airfield was constructed on the old domestic and technical sites with completely new buildings, to a much higher standard than the Air Ministry was used to, by an English design team led by architect Peter Benton, under the direction of an RCAF officer. For 12 months nearly 1000 men worked constructing the station, which worked around two two-acre warehouses. another was added later and is now in private ownership. The first RCAF personnel arrived autumn 1952.
The airfield was used for eleven years (1952–1963) as 30 Air Materiel Base, RCAF Langar. Langar was the RCAF's primary supply station for No. 1 Air Division RCAF in Europe, a complex of four fighter bases set up in nearby RAF North Luffenham and in France and West Germany by Canada to help meet NATO's European air defence commitments during the Cold War. It was the only Canadian airfield in the UK.
The RCAF established No. 30 Air Materiel Base (AMB), to handle the transportation of supplies, equipment, aircraft, personnel, and other support essential for the operation of the four NATO air bases and its headquarters. Several units were attached to 30 AMB; No. 137 (Transport) Flight, which was attached to the Movements Unit of 30 AMB, operated several types of aircraft including six Bristol Freighters, one Beechcraft Expeditor, and two Dakotas. No. 312 Supply Depot handled medical supplies and spares for mechanical equipment, including aircraft (e.g. the F-86 Sabre) and vehicles. No. 314 Technical Services Unit was tasked with inspecting all supplies before they were forwarded to operational bases. This unit also assisted with repair contracts and provided technical advice.
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