Learjet 23 vs Learjet 31

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

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Dimensions & configuration

Representative planforms, drawn to shared scale.

Learjet 23
35.6 × 43.3 ft 12.6 ft tall
2× Jet Retractable Pressurized
Learjet 31
43.8 × 48.7 ft 12.3 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 Learjet 23Learjet 31
Stall speed 90 kt119 kt
Approach speed 128 kt113 kt
Cruise speed 450 kt456 kt
Range 1590 nm1250 nm
Service ceiling 41000 ft51000 ft
Rate of climb 6900 fpm5480 fpm
Fuel burn 256.0 gph202.0 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.

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.
Learjet 31 Jet A
202.0 gph
Baseline
1,250 nm range 2.3 nm/gal 615 gal usable $1,212 fuel/hr 3h 02m endurance
Learjet 31: 202.0 gallons per hour at cruise, 1,250 nautical mile published range, 3 hour 2 minute endurance, 2.3 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:
Learjet 23 Jet A
$4,765 /hr
Baseline
Learjet 23: $4,765 per flight hour — fuel $1,536, maintenance and reserve $3,229.
Learjet 31 Jet A
$2,882 /hr
Baseline
Learjet 31: $2,882 per flight hour — fuel $1,212, maintenance and reserve $1,670.
Learjet 23 Jet
$12,411 /yr Baseline
Learjet 23: $12,411 per year — insurance withheld, hangar $9,911, annual inspection $2,500.
Learjet 31 Jet
$15,501 /yr Baseline
Learjet 31: $15,501 per year — insurance withheld, hangar $13,001, 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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Learjet 23
8 / 8 seats 847 / 847 gal fuel 675 lb wet payload 6,350 lb useful 12,500 lb MTOW
Learjet 31
10 / 10 seats 615 / 615 gal fuel 1,866 lb wet payload 5,986 lb useful 17,000 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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