Fliegerstaffel 21 was a Swiss Air Force squadron equipped with Hawker Hunter aircraft at the dissolution in 1994.

As a coat of arms, Fliegerstaffel 21 carried a white beaver, firing two guns while riding a red shark.

From 1939 until 1945 the Fliegerkompanie 21 used Messerschmitt Bf 109 E, their home base initially being the military airfield at Dübendorf.

The Vampire remained their aircraft until 1957 and was then replaced by De Havilland D.H. 112 Mk 4 Venom.

The Swiss Air Force meant to appear larger during the Second World War than it was.