Duncan Airport
Daylight today(Jul 18, 2026, local time)
About 15h 23m of daylight. Civil twilight (dawn/dusk) approximates the FAA definition of night for logging and currency. Times are computed and approximate — verify with official sources.
About Duncan Airport
Duncan Airport is a small airport in Helena, United States. It sits at an elevation of 4,260 ft (1,298 m) and has 1 runway, the longest 1,467 ft / 447 m. It observes America/Denver local time. The nearest airport is Ten Mile Airport (MT83), about 0.2 nm to the wnw.
Summary generated from this airport’s structured data — reference only.
Map
Runway centrelines, navaids and overlapping airspace. Tiles © OpenStreetMap contributors. Reference only — not for navigation.
Runways (1)
| Runway | Length | Width | Surface | Lighting | Status |
|---|---|---|---|---|---|
| 07 / 25 | 1,467 ft / 447 m | 50 ft | Turf | Unlit | Open |
Nearby airports
Great-circle distance and true bearing from Duncan Airport.
Frequently asked questions
Where is Duncan Airport located?
Duncan Airport is small airport located in Helena, United States, at an elevation of 4,260 ft (1,298 m).
How many runways does Duncan Airport have?
Duncan Airport has 1 runway, the longest being 1,467 ft / 447 m.
What time zone is Duncan Airport in?
Duncan Airport is in the America/Denver time zone (UTC-06:00).
What is the magnetic variation at Duncan Airport?
The magnetic variation (declination) at Duncan Airport is approximately 11.8° E, per the World Magnetic Model. Variation changes slowly over time — always use the current value charted for navigation.
What airports are near Duncan Airport?
The nearest airport to Duncan Airport is Ten Mile Airport (MT83), about 0.2 nm to the wnw, followed by Nistler Helena Airport and Fort Harrison Army Airfield.
Is the information on this page suitable for flight planning?
No. Duncan Airport data here is for reference and training only — not for navigation. Always consult official sources and current charts before any flight.