Gulfstream G150 vs Learjet 23

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 23
35.6 × 43.3 ft 12.6 ft tall
2× Jet 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 23
Stall speed —90 kt
Approach speed 115 kt128 kt
Cruise speed 459 kt450 kt
Range 3000 nm1590 nm
Service ceiling 45000 ft41000 ft
Rate of climb 3340 fpm6900 fpm
Fuel burn 192.0 gph256.0 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
192.0 gph
Baseline
3,000 nm range 2.4 nm/gal 1537 gal usable $1,152 fuel/hr 8h 00m endurance
Gulfstream G150: 192.0 gallons per hour at cruise, 3,000 nautical mile published range, 8 hour 0 minute endurance, 2.4 nautical miles per gallon.
Learjet 23 Jet A
256.0 gph
Baseline
1,590 nm range 1.8 nm/gal 847 gal usable $1,536 fuel/hr 3h 18m endurance
Learjet 23: 256.0 gallons per hour at cruise, 1,590 nautical mile published range, 3 hour 18 minute endurance, 1.8 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
$3,400 /hr
Baseline
Gulfstream G150: $3,400 per flight hour — fuel $1,152, maintenance and reserve $2,248.
Learjet 23 Jet A
$4,765 /hr
Baseline
Learjet 23: $4,765 per flight hour — fuel $1,536, maintenance and reserve $3,229.
Gulfstream G150 Jet
$97,800 /yr Baseline
Gulfstream G150: $97,800 per year — insurance $43,400, hangar $51,900, annual inspection $2,500.
Learjet 23 Jet
$12,411 /yr Baseline
Learjet 23: $12,411 per year — insurance withheld, hangar $9,911, 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
8 / 8 seats 1,537 / 1,537 gal fuel 752 lb wet payload 11,050 lb useful 26,100 lb MTOW
Learjet 23
8 / 8 seats 847 / 847 gal fuel 675 lb wet payload 6,350 lb useful 12,500 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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