At a glance
- Where does it stand? Gulfstream’s G400 has been in flight testing since its first flight in August 2024 in Savannah. The manufacturer has published neither a certification date nor an entry-into-service date.
- Range: 7,778 km (4,200 nautical miles) at Mach 0.85 with 8 passengers, according to the official specifications.
- Cabin: 40.8 m³, up to 12 passengers, 5 berths and 10 panoramic oval windows.
- Engines: two Pratt & Whitney Canada PW812GA, 60 kN each.
- Price: not disclosed by Gulfstream to date.
Gulfstream, a General Dynamics company, is continuing flight tests of its G400 without having set a certification date. The published facts come down to a successful first flight and a still provisional specification sheet. The G400 remains a test aircraft, and all its performance figures are described as preliminary by its manufacturer. Here is what is known, based on official figures.
Where does G400 certification stand?
The official G400 specification page states that its performance data are preliminary and subject to change. It mentions neither a certification status nor an entry-into-service date. No certification date has been announced by Gulfstream or General Dynamics. Before any delivery, the aircraft must obtain its type certificate, and the manufacturer has not released a timetable for that step.
First flight on 15 August 2024 in Savannah
According to the General Dynamics press release, the G400 took off from Savannah/Hilton Head International Airport at 9:04 a.m. for a flight of 2 hours and 54 minutes. It reached Mach 0.85 and 12,497 metres (41,000 ft), using a blend of sustainable aviation fuel from the Savannah campus. The flight officially launched the flight test programme. Mark Burns, president of Gulfstream, saw it as proof of the maturity of the new programmes and of the deliberate commonality across the next-generation fleet.
7,778 km at Mach 0.85, Mach 0.90 top speed
Gulfstream quotes a range of 4,200 nautical miles, or 7,778 km, at Mach 0.85 with 8 passengers and 3 crew, with theoretical NBAA IFR reserves. At a high-speed cruise of Mach 0.88, it drops to 7,315 km. Maximum operating speed is Mach 0.90. The manufacturer claims 29% better fuel efficiency than the G450, the previous-generation aircraft, over 3,000 nautical miles with 8 passengers. Takeoff distance is 1,524 metres and maximum cruise altitude 15,545 metres.
A 40.8 m³ cabin for 12 passengers
The cabin measures 11.07 metres long excluding baggage, 2.31 metres wide and 1.88 metres high, for a volume of 40.80 m³. Three floor plans are offered, with 9, 11 or 12 seats, up to 2.5 living areas and 5 berths. Ten panoramic oval windows, a hallmark of the brand, light the whole space. The galley is forward, the 4.96 m³ baggage compartment aft, with a lavatory aft and an optional one forward.
100% fresh air, 992 m cabin altitude
As on Gulfstream’s other next-generation aircraft, cabin air is 100% fresh, never recirculated, and purified by plasma ionisation. At 12,497 metres, cabin pressure is equivalent to an altitude of 992 metres, which Gulfstream presents as the lowest cabin altitude in its class. Customers can see the interior, by invitation, in a full-size mock-up at the Savannah showroom or at the design centre in Beverly Hills.
PW812GA engines and Symmetry flight deck
The G400 is powered by two Pratt & Whitney Canada PW812GA engines with 60 kN of thrust each. It inherits the high-speed wing and winglets introduced on the G500 and G600, as well as the sidestick-equipped Symmetry Flight Deck. The Predictive Landing Performance System is designed to improve safety and pilot situational awareness. Maximum takeoff weight is 31,683 kg, with a wingspan of 26.31 metres and a length of 26.29 metres.
Price and deliveries still to be announced
Gulfstream does not publish a list price for the G400 and has not announced a delivery schedule. No official figure can therefore be given at this stage. For context, see our ranking of the most expensive private jets in the world, our Gulfstream V profile and, at the other end of the market, the Bombardier Global 8000, an ultra-long-range jet.
| Manufacturer | Gulfstream Aerospace (General Dynamics), Savannah |
| Status | in flight testing, certification not dated |
| First flight | 15 August 2024 |
| Range | 7,778 km at Mach 0.85 (8 passengers) |
| Speed | Mach 0.88 high-speed cruise, Mach 0.90 maximum |
| Cabin | 11.07 m x 2.31 m x 1.88 m, 40.80 m³ |
| Passengers | up to 12, 5 berths |
| Engines | 2 Pratt & Whitney Canada PW812GA, 60 kN |
| Cabin altitude | 992 m at 12,497 m |
| Price | not disclosed |
Information verified on 10 November 2026. Sources: G400 page on gulfstream.com, General Dynamics press release of 15 August 2024.
