Gulfstream has started flight-testing the first G400 fitted with a complete passenger cabin, taking another step toward certification of the new business jet as it showcased the aircraft at NBAA-BACE 2026 in Las Vegas. The aircraft flew from Dallas Love Field for 2 hours and 46 minutes, reaching 48,000 feet; its 11-passenger interior, arranged across two-and-a-half living areas, will allow Gulfstream to evaluate cabin systems and passenger comfort in flight. The G400 first flew in August 2024, more than two years ago, and has since undergone high-altitude testing in Telluride, Colorado, and cold-weather testing in Iqaluit, Canada. It is powered by two Pratt & Whitney Canada PW812GA engines.
Another G400 traveling to the show set a Miami–Las Vegas speed record, completing the trip in 4 hours and 8 minutes at an average speed of Mach 0.89, using a blend of sustainable aviation fuel. "The aircraft continues to perform exceptionally well as we advance through the rigorous certification program," Gulfstream President Mark Burns said. Gulfstream introduced the G400 in 2021 with a base price of $34.5 million and has not announced a revised certification date. The company lists projected range at 4,200 nautical miles at Mach 0.85 with eight passengers, three crew and fuel reserves, and a planned maximum operating speed of Mach 0.90; cabin layouts seat nine, 11 or 12 passengers, with sleeping space for up to five in the largest configuration and 10 oval windows. The Symmetry Flight Deck offers touchscreen controls and active control sidesticks, plus a landing-performance system designed to help pilots recognize runway overrun risk on approach.
