The squadron briefly flew the Hawker Hurricane before receiving the Hawker Typhoon, flying ground attack missions with the Second Tactical Air Force in support of Allied advances in northwestern Europe from mid-1944 to the end of the war in May 1945.

Moved to Germany in 1967, it underwent several redesignations before assuming a ground attack mission at CFB Baden–Soellingen as 439 Tactical Fighter Squadron.

Equipped with North American Harvard Mark IIB trainers and Westland Lysander Mark II army co-operation aircraft, the squadron trained with the 4th and 7th Canadian Divisions in close support and reconnaissance.

It relocated to Debert, Nova Scotia, on 16 February 1942, joining Eastern Air Command.

From the latter, on 27 March, it flew its first ground attack mission against V-1 flying bomb launch sites as part of No.

The squadron also attacked German bases and communications targets in preparation for the Normandy landings of 6 June.

439 Squadron remained there for the northern hemisphere winter and during the last months of the war attacked communications and shipping in sweeps over Germany.

They were deactivated between November 30, 1963, and February 28, 1964, and reactivated on March 1, 1964, as 439 Strike/Attack Squadron, equipped with CF-104 Starfighters.

They were disbanded at Baden-Soellingen on 15 May 1993 and reactivated shortly after at 3 Wing Bagotville as 439 Combat Support Squadron; the redesignation was officially carried out on 1 April.