K4J6 · St Marys Airport
St Marys Airport serves St Marys, Georgia at 23 ft elevation with its longest runway, 04/22, at 5,000 by 100 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 K4J6 in JetDesk: live METAR, TAF, winds and runway verdict →
01Runways
| Runway | Length × width | Surface | Lighting |
|---|---|---|---|
| 04/22 | 5,000 × 100 ft | asphalt | lit |
| 13/31 | 4,000 × 75 ft | asphalt | unlit |
02Density altitude and turboprop runway margins
Standard temperature at 23 ft is about 15°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, 15°C) | 23 ft | 2,442 ft | 2,112 ft | 3,169 ft |
| Warm day (ISA +10) | 1,223 ft | 2,677 ft | 2,239 ft | 3,359 ft |
| Hot day (ISA +20) | 2,423 ft | 2,911 ft | 2,366 ft | 3,548 ft |
| 35°C afternoon | 2,429 ft | 2,912 ft | 2,366 ft | 3,549 ft |
03Nearby fields with 5,000 ft or more
Useful as alternates, as fuel stops when the price at K4J6 is high, or as the longer runway on a hot afternoon.
| Airport | Distance | Longest runway |
|---|---|---|
| KFHB Fernandina Beach Municipal Airport | 10 nm SE | 5,301 ft |
| KJAX Jacksonville International Airport | 17 nm SW | 10,000 ft |
| KSSI St Simons Island Airport | 25 nm N | 5,584 ft |
| KBQK Brunswick Golden Isles Airport | 31 nm N | 8,001 ft |
04Jet A prices and FBOs at K4J6
No public API publishes FBO fuel prices, so JetDesk does not guess. Pilots and crews log the price they actually paid at K4J6, 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 K4J6 or read what a fuel stop actually saves.