450 Squadron of the Royal Australian Air Force, which flew under that number from 1941 until 1945 in the Middle East and Italy.

In August the following year, 450 Tactical Helicopter Squadron was transferred back to 1 Wing at CFB St.

On May 2, 2012, the squadron was re-established to operate the CH-147F Chinook helicopters of the Royal Canadian Air Force, based out of CFB Petawawa.

There were 4 crew on board at the time, 2 of whom were sent to hospital with non-life-threatening injuries while the search continued for the remaining 2.

On June 21, 2023, the bodies of the remaining 2 crew members were recovered from the Ottawa River.