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Dieudonné Costes (14 November 1892 – 18 May 1973) was a French aviator who set flight distance records. He was also a fighter ace during World War I.
Costes was born in Septfonds, Tarn-et-Garonne. He received a pilot diploma (brevet) on 26 September 1912. During World War I he served in the French Air Service, in MF55 and MF85 Farman squadrons, then in N506, N507 and N531 fighterNieuport squadrons, on the Balkan front. He scored there 8 victories (6 confirmed), the first in April 1917, the rest in January–September 1918. He ended the war as a 2nd Lieutenant.
After the war he flew in a civilian aviation, starting with Latecoere in 1920, flying with mail on Toulouse-Casablanca route, then flying on Bordeaux-Paris route in 1921 and on Paris-London route in Air Union airlines in 1923. From 1925 he became a test pilot in Breguet works. Then he started to perform long-distance and record breaking flights with Breguet 19 aircraft. He became, with his co-pilot, the first man to fly from Paris to New York, where they were feted with a ticker-tape welcome.
