Donald Ernest Kingaby, DSO, AFC, DFM & Two Bars (7 January 1920 – 31 December 1990) was a Royal Air Force (RAF) aviator and flying ace of the Second World War. He was the only person to be awarded the Distinguished Flying Medal three times. During an operational career of some 300 operations, Kingaby scored 21 air victories against enemy aircraft, as well as two shared victories, six probables and 11 damaged during the war. 14 of his solo victories came against the Messerschmitt Bf 109.