4 SFTS) was a flying training school of the Royal Australian Air Force (RAAF) during World War II.

Responsible for intermediate and advanced instruction of pilots under the Empire Air Training Scheme (EATS), the school was based at Geraldton, Western Australia, and operated Avro Anson aircraft.

Flying instruction in the RAAF underwent major changes following the outbreak of World War II, in response to a dramatic increase in the number of aircrew volunteers and the commencement of Australia's participation in the Empire Air Training Scheme (EATS).

[5] Geraldton's civil airport already had extensive runways, taxiways, hangars and barracks, but more buildings were required to house the RAAF trainees and unit personnel.

All its Avro Anson aircraft were transferred from other units that, according to the RAAF Historical Section, "happily disposed of their oldest air frames".

Coupled with a shortage of the spare parts needed to keep such aircraft operational, the result was that flying hours remained low for some time.

4 SFTS was operating just over a hundred aircraft, including two Fairey Battles and two de Havilland Fox Moths, the remainder being Ansons.

[12] From October 1942 to March 1944, the school was commanded by World War I veteran and pioneer civil aviator Norman Brearley.

4 SFTS's Ansons crashed after colliding with trees after takeoff at a satellite airfield on 21 July 1943; one of the injured died later without regaining consciousness.

[14] Four occupants of an Anson were killed on 1 November, when a wing disintegrated after the pilot apparently became disorientated in cloud and the plane went into a high-speed dive.

4 SFTS began disbanding in January 1945, as part of a general reduction in RAAF flight instruction owing to a surplus of trained aircrew, and the task was complete by May.

4 SFTS staff on 1 June 1945 to administer Geraldton's facilities and maintain its aircraft following the flying school's disbandment.

[18] CMU Geraldton was one of many such units that the RAAF raised for the storage and maintenance of surplus aircraft prior to their disposal after the war.