May 27, Swiss professor August Piccard and his assistant Kipfer take a stratosphere-balloon to 15,781 m, starting in Augsburg and landing on a glacier in Austria.
June
June 23-July 1, Wiley Post and Harold Gatty fly around the world in a Lockheed Vega, the Winnie Mae, covering 15,474 miles in 8 days 15 hours 51 minutes - a new record.
October 1 - KLM begins a regular service between Amsterdam and Batavia by Fokker F.XII. At 13,744 km (8,540 miles) this is the longest regular air route in the world at the time.