Learjet 40 vs Learjet 45

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

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Dimensions & configuration

Representative planforms, drawn to shared scale.

Learjet 40
47.8 × 55.5 ft 14.1 ft tall
2× Turbofan Retractable Pressurized
Learjet 45
47.8 × 57.6 ft 14.1 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 Learjet 40Learjet 45
Stall speed 119 kt95 kt
Approach speed 123 kt123 kt
Cruise speed 464 kt445 kt
Range 1692 nm1824 nm
Service ceiling 51000 ft51000 ft
Rate of climb 2820 fpm2800 fpm
Fuel burn 224.0 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.

Learjet 40 Jet A
224.0 gph
Baseline
1,692 nm range 2.1 nm/gal 802 gal usable $1,344 fuel/hr 3h 34m endurance
Learjet 40: 224.0 gallons per hour at cruise, 1,692 nautical mile published range, 3 hour 34 minute endurance, 2.1 nautical miles per gallon.
Learjet 45 Jet A
205.0 gph
Baseline
1,824 nm range 2.2 nm/gal 905 gal usable $1,230 fuel/hr 4h 24m endurance
Learjet 45: 205.0 gallons per hour at cruise, 1,824 nautical mile published range, 4 hour 24 minute endurance, 2.2 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 40 Jet A
$3,334 /hr
Baseline
Learjet 40: $3,334 per flight hour — fuel $1,344, maintenance and reserve $1,990.
Learjet 45 Jet A
$3,370 /hr
Baseline
Learjet 45: $3,370 per flight hour — fuel $1,230, maintenance and reserve $2,140.
Learjet 40 Turbofan
$48,321 /yr Baseline
Learjet 40: $48,321 per year — insurance $15,559, hangar $30,262, annual inspection $2,500.
Learjet 45 Turbofan
$54,442 /yr Baseline
Learjet 45: $54,442 per year — insurance $20,571, hangar $31,371, 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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1
Learjet 40
10 / 10 seats 802 / 802 gal fuel 2,237 lb wet payload 7,610 lb useful 20,350 lb MTOW
Learjet 45
11 / 11 seats 905 / 905 gal fuel 796 lb wet payload 6,860 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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