List of aircraft of World War II

Strategic and photo-reconnaissance aircraft were frequently specially modified variants of high performance aircraft, usually fighters or bombers.

Primary trainers are used for basic flight training while advanced trainers were used for familiarization with the more complex systems and higher speeds of combat aircraft, and for air combat training. Multi-engined trainers were used to prepare pilots for multi-engine bombers and transports, and to train navigators, bombardiers, gunners and flight engineers. Most nations used obsolete combat types for advanced training, although large scale training programs such as the British Commonwealth Air Training Plan (BCATP) required more aircraft than were available and aircraft were designed and built specifically to fulfill training roles. Intermediate trainers were used in several countries but additional hours at the primary stage made them redundant.

Prototypes were aircraft that were intended to enter service but did not, either due to changing requirements, failing to meet requirements or other problems. They may not have reached production before the end of the war but may have entered service post-war. If the aircraft was deployed to regular squadrons or used in an operational capacity other than evaluation, it should be listed above under its appropriate type. Napkinwaffe - paper projects and aircraft that first flew after the war are not included.