KS21 · Sunriver Airport

SUNRIVER, OREGON · SMALL AIRPORT

4,164

Elevation ft

Runway

5,460

Longest ft · 18/36

43.88N

121.45W

Sunriver Airport serves Sunriver, Oregon at 4,164 ft elevation with its longest runway, 18/36, at 5,460 by 75 ft. The figures below are computed from FAA NASR runway data (via OurAirports) and the same rules of thumb JetDesk uses on the airport page in the app; the POH and current NOTAMs are the authority.

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01Runways

Runway	Length × width	Surface	Lighting
18/36	5,460 × 75 ft	asphalt	lit

02Density altitude and turboprop runway margins

Standard temperature at 4,164 ft is about 7°C. Every 1,000 ft of density altitude adds roughly 8 percent to a turboprop's takeoff distance and 5 percent to its landing distance. The table uses Piper Meridian book numbers (2,438 ft takeoff and 2,110 ft landing over a 50 ft obstacle at sea level, ISA, max weight) as a reference airplane; heavier turboprops and light jets scale the same way from their own POH figures.

Conditions	Density altitude	Takeoff est.	Landing est.	Landing × 1.5
Standard day (ISA, 7°C)	4,164 ft	3,250 ft	2,549 ft	3,824 ft
Warm day (ISA +10)	5,364 ft	3,484 ft	2,676 ft	4,014 ft
Hot day (ISA +20)	6,564 ft	3,718 ft	2,803 ft	4,204 ft
35°C afternoon	7,563 ft	3,913 ft	2,908 ft	4,362 ft

Planning aid only. Even on a 35°C afternoon the longest runway (18/36, 5,460 ft) covers a Meridian-class turboprop's landing distance with a 50 percent margin (4,362 ft needed). The percentages are a generic rule of thumb applied to one reference airplane, not certified performance data for any specific aircraft, and the runway size categories describe the runway, not your airplane's suitability. Verify with the approved flight manual before every flight.

03Nearby fields with 5,000 ft or more

Useful as alternates, as fuel stops when the price at KS21 is high, or as the longer runway on a hot afternoon.

Airport	Distance	Longest runway
KRDM Roberts Field	26 nm NE	7,038 ft
S39 Prineville Airport	34 nm NE	5,405 ft
KS33 Madras Municipal Airport	49 nm N	5,091 ft
K62S Christmas Valley Airport	51 nm SE	5,200 ft
KEUG Eugene Airport	77 nm W	8,009 ft

04Jet A prices and FBOs at KS21

No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KS21, the app flags a price stale after two weeks, and the route finder ranks every field within a corridor of your route by net savings after the cost of the extra cycle. Log a price at KS21 or read what a fuel stop actually saves.

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