The first aerial circumnavigation is completed by a team from the US Army.

The first aerial circumnavigation of the world was completed in 1924 by four aviators from an eight-man team of the United States Army Air Service, the precursor of the United States Air Force. The 175-day journey from April to September covered over 26,345 miles (42,398 km). The team generally traveled east to west, around the northern Pacific Rim, through to South Asia and Europe and back to Seattle's Sand Point Airfield in the United States. Airmen Lowell H. Smith and Leslie P. Arnold, and Erik H. Nelson and John Harding Jr. made the trip in two single-engined open-cockpit Douglas World Cruisers (DWC) configured as floatplanes for most of the journey. Lead aircraft Chicago, and the New Orleans completed the expedition. Four more flyers in two additional DWC began the journey but their aircraft crashed or were forced down. All airmen survived. They were awarded the Distinguished Service Medal, and the flight won the Mackay Trophy aviation award for 1924.

September 28 is the 271st day of the year in the Gregorian calendar; 94 days remain until the end of the year.