RCAF Detachment Gananoque was a relief landing field for the Royal Air Force's No. 31 Service Flying Training School (SFTS) located at 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.