The British Commonwealth Air Training Plan (BCATP), often referred to as simply "The Plan", was a massive, joint military aircrew training program created by the United Kingdom, Canada, Australia and New Zealand, during the Second World War. BCATP remains as one of the single largest aviation training programs in history and was responsible for training nearly half the pilots, navigators, bomb aimers, air gunners, wireless operators and flight engineers who served with the Royal Air Force (RAF), Royal Navy Fleet Air Arm (FAA), Royal Australian Air Force (RAAF), Royal Canadian Air Force (RCAF) and Royal New Zealand Air Force (RNZAF) during the war.

Under a parallel agreement, the Joint Air Training Scheme, South Africa trained 33,347 aircrew for the South African Air Force and other Allied air forces. This number was exceeded only by Canada, which trained 131,500 personnel.

Students from many other countries attended schools under these plans, including Argentina, Belgium, Ceylon, Czechoslovakia, Denmark, Finland, Fiji, France, Greece, the Netherlands, Norway, Poland and the Republic of China.

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