Gulfstream G150 vs Learjet 55

Side-by-side specs, range, and operating costs.

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Dimensions & configuration

Representative planforms, drawn to shared scale.

Gulfstream G150
55.6 × 56.8 ft 19.1 ft tall
2× Jet Retractable Pressurized
Learjet 55
43.8 × 55.1 ft 14.7 ft tall
2× Turbofan Retractable Pressurized

Flight Profile

Service ceiling, range, and climb rate.

Tap legend to isolate

Arc represents the climb-cruise-descent profile based on published service ceiling and range. Climb rate annotated on ascent. FL180 (18,000 ft) shown for reference.

Mission Performance

Stall, approach, cruise, range, ceiling and climb: best values are at the top.

Mission performance specifications
Specification Gulfstream G150Learjet 55
Stall speed 110 kt110 kt
Approach speed 124 kt143 kt
Cruise speed 459 kt420 kt
Range 2950 nm2165 nm
Service ceiling 45000 ft51000 ft
Rate of climb 3340 fpm4180 fpm
Fuel burn 288.0 gph205.0 gph

Each axis is scaled independently across the compared aircraft and printed in its own units; every vertex sits at the published figure. Higher is better on all axes: Stall, Approach and Fuel Burn are inverted (lower = higher). A missing figure breaks the line at that axis.

Fuel Burn & Range

Range, endurance, and what the fuel costs by the hour.

Gulfstream G150 Jet A
288.0 gph
Baseline
2,950 nm range 1.6 nm/gal 1537 gal usable $1,728 fuel/hr 5h 20m endurance
Gulfstream G150: 288.0 gallons per hour at cruise, 2,950 nautical mile published range, 5 hour 20 minute endurance, 1.6 nautical miles per gallon.
Learjet 55 Jet A
205.0 gph
Baseline
2,165 nm range 2.0 nm/gal 1000 gal usable $1,230 fuel/hr 4h 52m endurance
Learjet 55: 205.0 gallons per hour at cruise, 2,165 nautical mile published range, 4 hour 52 minute endurance, 2.0 nautical miles per gallon.
Jet A range each cell = 1 hr of cruise · width scales with speed

Bars show published still-air range. Endurance is usable fuel divided by the published cruise burn. Estimates only. Always verify against the POH.

Runway Performance

Density altitude adjusted estimates

Outside Air Temp
0°F57°F115°F
Field Elevation
SL4,0008,000 ft
Density Altitude

Takeoff over 50 ft obstacle

Landing ground roll

Base distance DA penalty
Scale: 6,000 ft

FAA 10%/1,000 ft DA rule of thumb (FAA-H-8083-25B). Turboprops and jets are less sensitive in practice. Always verify against the POH.

Estimated Operating Costs

Scale:
Gulfstream G150 Jet A
$3,557 /hr
Baseline
Gulfstream G150: $3,557 per flight hour — fuel $1,728, maintenance and reserve $1,829.
Learjet 55 Jet A
$3,030 /hr
Baseline
Learjet 55: $3,030 per flight hour — fuel $1,230, maintenance and reserve $1,800.
Gulfstream G150 Jet
$98,138 /yr Baseline
Gulfstream G150: $98,138 per year — insurance $43,738, hangar $51,900, annual inspection $2,500.
Learjet 55 Turbofan
$17,050 /yr Baseline
Learjet 55: $17,050 per year — insurance withheld, hangar $14,550, annual inspection $2,500.

Estimates only. Costs vary by location, pilot profile, and market conditions. See individual aircraft pages for source notes.

Capability & limits

Each bar stacks your selected occupants against full fuel and the aircraft's useful-load limit (the black line). The open gap between them is spare payload. Add an occupant and the gap closes; once it's gone, fuel has to give.

lb

+ lb / pax

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Gulfstream G150
10 / 10 seats 1,537 / 1,537 gal fuel 752 lb wet payload 11,050 lb useful 26,100 lb MTOW
Learjet 55
10 / 10 seats 1,000 / 1,000 gal fuel 2,157 lb wet payload 8,857 lb useful 21,500 lb MTOW

Occupants at 190 + 30 lb each. Fuel at 6.7 lb/gal jet-A, 6.0 lb/gal avgas.

Payload-Range Map

Origin: · two fingers to move map

lb

+ lb / pax

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1

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