Beechcraft King Air 250 vs Cessna Conquest II

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

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Dimensions & configuration

Representative planforms, drawn to shared scale.

Beechcraft King Air 250
57.9 × 43.8 ft 14.8 ft tall
2× Turboprop Retractable Pressurized
Cessna Conquest II
49.3 × 39.0 ft 13.2 ft tall
2× Turboprop 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 Beechcraft King Air 250Cessna Conquest II
Stall speed 88 kt86 kt
Approach speed 105 kt105 kt
Cruise speed 310 kt298 kt
Range 1720 nm2200 nm
Service ceiling 35000 ft35000 ft
Rate of climb 2450 fpm2435 fpm
Fuel burn 138.0 gph63.0 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.

Beechcraft King Air 250 Jet A
138.0 gph
Baseline
1,720 nm range 2.2 nm/gal 544 gal usable $828 fuel/hr 3h 56m endurance
Beechcraft King Air 250: 138.0 gallons per hour at cruise, 1,720 nautical mile published range, 3 hour 56 minute endurance, 2.2 nautical miles per gallon.
Cessna Conquest II Jet A
63.0 gph
Baseline
2,200 nm range 4.7 nm/gal 475 gal usable $378 fuel/hr 7h 32m endurance
Cessna Conquest II: 63.0 gallons per hour at cruise, 2,200 nautical mile published range, 7 hour 32 minute endurance, 4.7 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:
Beechcraft King Air 250 Jet A
$1,738 /hr
Baseline
Beechcraft King Air 250: $1,738 per flight hour — fuel $828, maintenance and reserve $910.
Cessna Conquest II Jet A
$1,400 /hr
Baseline
Cessna Conquest II: $1,400 per flight hour — fuel $378, maintenance and reserve $1,022.
Beechcraft King Air 250 Turboprop
$104,000 /yr Baseline
Beechcraft King Air 250: $104,000 per year — insurance $35,000, hangar $24,000, annual inspection $45,000.
Cessna Conquest II Turboprop
$41,771 /yr Baseline
Cessna Conquest II: $41,771 per year — insurance $20,000, hangar $11,741, annual inspection $10,030.

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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Beechcraft King Air 250
11 / 11 seats 544 / 544 gal fuel 115 lb wet payload 3,760 lb useful 12,500 lb MTOW
Cessna Conquest II
10 / 10 seats 475 / 475 gal fuel 718 lb wet payload 3,900 lb useful 9,850 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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