G650 vs GIV: how the two fleets are really flown
On three of the four chapters' lead measures, the gap inside each fleet is bigger than the gap between the G650 and the GIV. The clearest difference is hours per landing: the middle G650 at 2.5 : 1, the middle GIV at 1.9 : 1.
Gulfstream G650/G650ER fleet statistics →Gulfstream GIV/G450 fleet statistics →
Fatigue
On hours per landing, the types sit further apart than the middle half of either fleet spans: the middle G650 at 2.5 : 1, the middle GIV at 1.9 : 1.
What each landing and pressurization cycle costs the structure: landings per hour and short hops.
Hours per landing
Where the two fleets sitSide by side
Every active aircraft of each type in North America: 314 G650s and 495 GIVs.| Measure | G650 median | Middle half | GIV median | Middle half |
|---|---|---|---|---|
| Hours per landing Each aircraft’s average flight hours per landing | 2.5 : 1 | 2.0–3.0 : 1 | 1.9 : 1 | 1.7–2.2 : 1 |
| Short hops Share of legs under 300 nm | 30% | 23–42% | 33% | 26–40% |
| Leg length Median leg | 654 nm | 469–906 nm | 560 nm | 446–719 nm |
Corrosion
On salt air, the gap between the types is smaller than the spread inside either fleet: the middle G650 at 3%, the middle GIV at 2%.
What the air around the fleet does overnight: salt, damp and freeze–thaw.
Salt air
Where the two fleets sitSide by side
Aircraft we can place on enough nights at known fields: 254 G650s and 388 GIVs.| Measure | G650 median | Middle half | GIV median | Middle half |
|---|---|---|---|---|
| Salt air Nights within 2 km of the coast | 3% | 1–8% | 2% | 0–7% |
| Near the coast Nights within 10 km of the coast | 29% | 11–65% | 32% | 7–58% |
| Damp air Hours a day at 80% humidity or more, above freezing | 7.7 h | 6.6–9.1 h | 7.4 h | 6.4–8.6 h |
| Freeze–thaw Nights that froze and thawed within the day | 6% | 2–12% | 7% | 2–13% |
| Moisture in the air Average absolute humidity overnight | 9.3 g/m³ | 8.3–10.4 g/m³ | 9.5 g/m³ | 8.4–10.9 g/m³ |
Engines and brakes
On short runways, the gap between the types is smaller than the spread inside either fleet: the middle GIV at 39%, the middle G650 at 37%.
What departures ask of engines, brakes and tires: heat and height, and runway length.
Short runways
Where the two fleets sitSide by side
Departures we could assess: 313 G650s and 494 GIVs.| Measure | G650 median | Middle half | GIV median | Middle half |
|---|---|---|---|---|
| Short runways Departures where the longest runway was under 1.25× the takeoff distance | 37% | 24–53% | 39% | 27–52% |
| Hot, high takeoffs Departures at 5,000 ft density altitude or more | 3% | 1–6% | 5% | 2–8% |
| Density altitude Typical density altitude at takeoff | 1,079 ft | 781–1,409 ft | 1,391 ft | 1,148–1,736 ft |
Utilization
On flights a month, the gap between the types is smaller than the spread inside either fleet: the middle GIV at 9, the middle G650 at 7.
How steadily each fleet is used: flights, flying days and estimated hours.
Flights a month
Where the two fleets sitSide by side
Every active G650 (314) and GIVs with at least 40% of their flights tracked (392). Each type uses the tracking rule its own fleet page uses.| Measure | G650 median | Middle half | GIV median | Middle half |
|---|---|---|---|---|
| Flights a month In the months it flew | 6.7 | 4.9–9.5 | 8.5 | 4.9–14.7 |
| Days flown a month Days with at least one flight | 5.1 | 3.7–6.8 | 5.8 | 3.6–9.7 |
| Estimated hours a year From time in the air | ≈199 h | 139–271 h | ≈189 h | 120–358 h |
Choosing between a G650 and a GIV?
Check both tails, not the types.
Enter the two tails on your shortlist. TailCheck grades each one on Fatigue, Corrosion, Engines and brakes, and Utilization against its own type, then puts them side by side.
Trip-length mix
33% of G650 legs and 34% of GIV legs were under 300 nm, a gap of 1 percentage point; 39% and 32% were over 900 nm.
| Leg length (nm) | G650 | GIV |
|---|---|---|
| <150 | 17% | 17% |
| 150–300 | 16% | 17% |
| 300–450 | 8% | 10% |
| 450–600 | 7% | 8% |
| 600–900 | 13% | 15% |
| 900–1,200 | 10% | 11% |
| 1,200–1,800 | 8% | 9% |
| 1,800+ | 21% | 12% |
Share of legs by length in nautical miles, 1 Aug 2025 – 31 Jul 2026: 25,932 legs by 314 G650s and 49,371 legs by 495 GIVs, every leg with a known distance. The G650's trips bunch at 1,800+ nm, the GIV's at <150 nm.
G650 vs GIV: on paper
Certified figures come from each type certificate data sheet, the rest from the manufacturer. Each figure names its source; a range covers the variants one page tracks together; a dash means we don’t have a source for that figure yet. We don’t have a manufacturer source for the GIV yet, so its manufacturer rows show a dash.
| Measure | G650/G650ER | GIV/G450 |
|---|---|---|
| Range (manufacturer) | 7,000–7,500 nmManufacturer (archived spec page, 14 Jun 2023) | —Not in our sources yet |
| High-speed cruise (manufacturer) | Mach 0.90Manufacturer (archived spec page, 14 Jun 2023) | —Not in our sources yet |
| Takeoff distance (manufacturer) | 5,858–6,299 ftManufacturer (archived spec page, 14 Jun 2023) | —Not in our sources yet |
| Cabin length (manufacturer) | 46 ft 10 inManufacturer (archived spec page, 14 Jun 2023) | —Not in our sources yet |
| Maximum takeoff weight (certified) | 99,600–103,600 lbEASA TCDS EASA.IM.A.169 Issue 17, p.17 | 70,900–74,600 lbEASA TCDS EASA.IM.A.070 Issue 13, p.37 |
| Fuel capacity (certified) | 44,200–48,200 lbEASA TCDS EASA.IM.A.169 Issue 17, p.14 | 25,895–29,500 lbEASA TCDS EASA.IM.A.070 Issue 13, p.36 |
| Maximum operating altitude (certified) | 51,000 ftEASA TCDS EASA.IM.A.169 Issue 17, p.14 | 45,000 ftEASA TCDS EASA.IM.A.070 Issue 13, p.36 |
| Passenger seats (certified) | Up to 19EASA TCDS EASA.IM.A.169 Issue 17, p.18 | Up to 19EASA TCDS EASA.IM.A.070 Issue 13, p.37 |
G650 vs GIV: questions
Which is flown more, the G650 or the GIV?
The G650, by about 10 estimated hours a year: the middle G650 flew ≈199 h a year, the middle GIV ≈189 h. That is a fleet median: the middle half of G650s logged 139–271 h and of GIVs 120–358 h, so one aircraft can sit far from its type. In flights, the medians are 7 a month for the G650 and 9 for the GIV.
Which lands more often for its hours, the G650 or the GIV?
The GIV: its middle aircraft flies 1.9 hours per landing, against 2.5 for the G650, 0.6 hours fewer per landing. More landings per hour means more pressurization cycles for the same time in the air. Short hops, legs under 300 nm, make up 30% of the middle G650's legs and 33% of the middle GIV's.
Which flies longer trips, the G650 or the GIV?
The G650, by 94 nm on the median leg: 654 nm for the middle aircraft, against 560 nm for the GIV. 33% of G650 legs and 34% of GIV legs were under 300 nm, a gap of 1 percentage point; 39% and 32% were over 900 nm.
Which spends more nights by the sea, the G650 or the GIV?
The G650, by 1 percentage point: its middle aircraft spends 3% of its nights within 2 km of the coast, the middle GIV 2%. Salt air is one of the corrosion inputs a TailCheck report grades for one aircraft against its own type.
Does this comparison include the G450?
Yes. The tracking data doesn't tell the GIV, GIV-SP, G300, G400, G350 and G450 apart, so the GIV figures here cover all of them. The specs table names a figure’s variants where the sources separate them.
Cite this data
The Aircraft Ledger. “Gulfstream G650/G650ER vs Gulfstream GIV/G450.” Data to 31 July 2026. theaircraftledger.com/compare/gulfstream-g650-vs-gulfstream-giv
Method: G650s and GIVs with most departures in North America, ADS-B tracking. Flight measures cover 1 Aug 2025 – 31 Jul 2026; each figure is the median of its own fleet, with the middle half (25th–75th percentile). Estimated hours from time in the air. We assume the longest runway at each field, so short-runway figures are conservative. Specifications from type certificate data sheets and the manufacturers, each cited. About our data