Business jets · Gulfstream Aerospace
Gulfstream IV / G300 / G400 / G450 GLF4
The Gulfstream IV is a large-cabin, long-range business jet and the ancestor of the modern Gulfstream line. The GIV-SP, G300, G400 and G450 versions all share the GLF4 designator.
Gulfstream IVs airborne over the US now
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of all airborne aircraftplus — on the ground
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Gulfstream IVs in the air over the last 24 hours
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Specifications
- ICAO code
- GLF4
- First flight
- 1985
- Typical cruise
- 460 kt / 529 mph
- Service ceiling
- 45,000 ft
- Range
- 4,200 nm / 4,833 mi
- Capacity
- 12-16 passengers
- Length
- 26.9 m / 88 ft
- Wingspan
- 23.7 m / 78 ft
Engines: 2 x Rolls-Royce Tay 611-8 turbofans. Family: Gulfstream. Figures are typical published values, rounded; real performance depends on variant, weight and conditions.
What it does in US skies
GIV-family jets fly corporate and charter trips across the US and over the oceans. Military versions carry senior officials as the C-20, and NOAA flies one as a hurricane research aircraft.
Main US operators: Corporate flight departments, Charter operators, US Air Force, Navy and Army (C-20 variants), NOAA.
How to recognize a Gulfstream IV
- Six large oval windows per side, a classic Gulfstream signature
- T-tail, swept wing with winglets and two rear-mounted engines
- Long, pointed nose and slim fuselage
- Shorter than the GV/G550, which has seven windows per side
How it looks on a flight tracker
Cruises at FL410 to FL450 around 440 to 490 knots. Corporate aircraft usually show N-numbers; military C-20s may use SAM or other government callsigns, or appear with limited details.
History
The Gulfstream IV first flew in September 1985 and entered service in 1987. The G450, the final version, was built until 2018 and replaced by the G500.
Where Gulfstream IVs are right now
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What is the ICAO code for the Gulfstream IV / G300 / G400 / G450?
The ICAO aircraft type designator for the Gulfstream IV / G300 / G400 / G450 is GLF4. Flight trackers and flight plans use this four-character code.
How fast does the Gulfstream IV fly?
The Gulfstream IV / G300 / G400 / G450 typically cruises at about 460 knots true airspeed (about 529 mph). Ground speed on a tracker varies with the wind.
How high can the Gulfstream IV fly?
Its service ceiling is about 45,000 ft.