On what date did KLM have its first flight?

The first KLM flight took place on 17 May 1920. KLM's first pilot, Jerry Shaw, flew from Croydon Airport, London, to Amsterdam. The flight was flown using a leased Aircraft Transport and Travel De Haviland DH-16, registration G-EALU, which was carrying two British journalists and some newspapers. In 1920, KLM carried 440 passengers and 22 tons of freight. In April 1921, after a winter hiatus, KLM resumed its services using its own pilots, and Fokker F.II and Fokker F.III aircraft. In 1921, KLM started scheduled services.

KLM's first intercontinental flight took off on 1 October 1924. The final destination was Jakarta (then called 'Batavia'), Java, in the Dutch East Indies; the flight used a Fokker F.VII with registration H-NACC and was piloted by Van der Hoop. In September 1929, regular scheduled services between Amsterdam and Batavia commenced. Until the outbreak of the Second World War in 1939, this was the world's longest-distance scheduled service by airplane. By 1926, it was offering flights to Amsterdam, Rotterdam, Brussels, Paris, London, Bremen, Copenhagen, and Malmö, using primarily Fokker F.II and Fokker F.III aircraft.