RCAF Detachment Alliston

The airfield was closed following the end of World War II. As a relief landing field for the British Commonwealth Air Training Plan (BCATP), its purpose became obsolete with the conclusion of the war and the subsequent winding down of the massive pilot training program. The demobilization of forces and consolidation of military assets led to the closure of numerous auxiliary airfields like Alliston across Canada.

The site of the former airport is now completely occupied by the Honda of Canada Mfg. (HCM) automotive assembly plant. Honda purchased the land in the mid-1980s and opened its first plant there in 1986. The area has been entirely redeveloped with multiple factory buildings, vast parking lots, and a vehicle test track. While no original airport structures or runways remain, the vehicle test track partially follows the layout of the former triangular runway system. The location is a major industrial hub and one of the largest employers in the region.

RCAF Detachment Alliston was a crucial component of the British Commonwealth Air Training Plan (BCATP) during World War II. It was officially designated as Relief Landing Field No. 1 for No. 1 Service Flying Training School (SFTS), which was based at the nearby RCAF Station Camp Borden. Constructed in the early 1940s, its primary function was to provide a safe, uncongested area for student pilots to practice takeoffs, landings, and emergency procedures. The main aircraft used for this advanced training was the North American Harvard. The airfield, along with countless others like it, was instrumental in the Allied war effort by facilitating the training of over 130,000 aircrew members from across the Commonwealth.

There are zero plans or prospects for reopening the site as an airport. The land is fully and permanently developed as a major industrial manufacturing complex, making any future aviation use physically and economically impossible.