On July 3, 2013, the Gulfstream G650 set a world speed record, making a worldwide flight in a westerly direction in 41 hours and 7 minutes
Flight 20 310 nautical miles with landings in Guam, Dubai and Cape Verde began and ended in San Diego (California).
Each flight of the G650 performed at a speed of Mach 0.9, the standard high cruising speed for this aircraft.
Source: agroup.aero
