KDEC · Decatur Airport
Decatur Airport serves Decatur, Illinois at 682 ft elevation with its longest runway, 06/24, at 8,496 by 150 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.
Open KDEC in JetDesk: live METAR, TAF, winds and runway verdict →
01Runways
| Runway | Length × width | Surface | Lighting |
|---|---|---|---|
| 06/24 | 8,496 × 150 ft | asphalt (PEM) | lit |
| 12/30 | 6,799 × 150 ft | asphalt (PEM) | lit |
| 18/36 | 5,298 × 150 ft | asphalt | lit |
02Density altitude and turboprop runway margins
Standard temperature at 682 ft is about 14°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, 14°C) | 682 ft | 2,571 ft | 2,182 ft | 3,273 ft |
| Warm day (ISA +10) | 1,882 ft | 2,805 ft | 2,309 ft | 3,463 ft |
| Hot day (ISA +20) | 3,082 ft | 3,039 ft | 2,435 ft | 3,653 ft |
| 35°C afternoon | 3,246 ft | 3,071 ft | 2,452 ft | 3,679 ft |
03Nearby fields with 5,000 ft or more
Useful as alternates, as fuel stops when the price at KDEC is high, or as the longer runway on a hot afternoon.
| Airport | Distance | Longest runway |
|---|---|---|
| KCMI University of Illinois Willard Airport | 30 nm NE | 8,101 ft |
| KMTO Coles County Memorial Airport | 35 nm SE | 6,501 ft |
| KSPI Abraham Lincoln Capital Airport | 37 nm W | 8,001 ft |
| KBMI Central Illinois Regional Airport at Bloomington-Normal | 39 nm N | 8,000 ft |
| KTIP Rantoul National Aviation Center - Frank Elliot field | 43 nm NE | 5,001 ft |
| K1H2 Effingham County Memorial Airport | 48 nm S | 5,103 ft |
04Jet A prices and FBOs at KDEC
No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at KDEC, 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 KDEC or read what a fuel stop actually saves.