Originally using De Havilland DH.4 aircraft in World War I, it was last equipped with BAe Hawk jet trainers.

239 Squadron at RAF Gatwick, West Sussex with Alison engined North American Mustang I's.

In January 1944 the squadron moved to RAF Turnhouse in Scotland and was re-equipped with Hawker Hurricane IV's in April 1944, converting to Supermarine Spitfire VB's in early May 1944.

The pilots of the squadron at this stage were drawn from former Army co-operation units, The Royal Marines and as well as the RAF.

Subsequently they moved to RAF Thorney Island, and shortly after in April 1948, the squadron was re-equipped with Gloster Meteor jet fighters.

based at RAF Chivenor, North Devon, as the 'Shadow' designation for one of its constituent squadrons.