
Billy Bishop, the top scoring Canadian and British Empire ace of the war, was piloting an S.E.5 on 19 June 1918, when he scored four Pfalz D.III fighters and a LVG C two-seat reconnaissance aircraft near Ploegsteert.He achieved this whilst piloting a Sopwith Camel fighter. John Inglis Gilmour of the Royal Air Force successfully brought down five German aircraft in a single day on 1 July 1918.For this success he was awarded the Distinguished Service Order.

Frederick McCall, Canadian flying ace, shot down five German fighters, four (3 Albatros D.V and 1 Fokker D.VII) in the morning and the fifth in the evening (Albatros D.V) of 30 June 1918.Henry Woollett of the Royal Air Force shot down and destroyed six German airplanes on 12 April 1918, setting two afire.John Lightfoot Trollope of the Royal Air Force shot down and destroyed seven German planes on 24 March 1918.Raymond Collishaw, a Canadian who was the top scoring Royal Naval Air Service ace, piloted a Sopwith Triplane when scoring six Albatros D.V fighters near Menen, 6 July 1917.Andrew Beauchamp-Proctor, the top scoring South African ace of the war, was piloting an SE5a fighter with Royal Air Force No 84 Squadron when he shot down five German aircraft on.He had a total of 27 kills during the war, even though he wore glasses and had a useless left arm. Bernert scored five victories within 20 minutes on 24 April 1917. The first single pilot (as opposed to double aviators, as is the case with the previously mentioned Arigi and Lasi) was World War I German flying ace Fritz Otto Bernert.

The first aviators to ever achieve "ace in a day" were pilot Julius Arigi and observer/gunner Johann Lasi of the Austro-Hungarian air force, on 22 August 1916, when they downed five Italian planes.

René Fonck, the top scoring French Aéronautique Militaire and Allied ace of the war, scored six in a day on both 9 May and 26 September 1918. Atkey credited with a total of 38 victories, making him the most successful two-seater pilot and Gass with 39 claims was the most successful observer ace of all time. Two days later, on 9 May, they were credited with another five enemy machines in the course of two sorties. On, they shot down five German planes in a single sortie over Arras. World War I Ace in a day on two occasions Ī Bristol F2B crew – Canadian pilot Captain Alfred Atkey and English observer Lieutenant Charles Gass – became "ace in a day" twice in the same week.
