Seattle to Helena flight distance & time (SEA-HLN)
How far is Seattle from Helena by plane? The great circle distance from Seattle Tacoma International Airport (SEA) to Helena Regional Airport (HLN) is 790 km / 427 nm, about 1h 14m flight time, with an initial heading of 93° (E).
| From | Seattle Tacoma International Airport (SEA), Seattle, US |
|---|---|
| To | Helena Regional Airport (HLN), Helena, US |
| Distance | 790 km · 427 nm · 491 mi |
| Initial heading | 93° (E) |
Aircraft with enough range to fly SEA to HLN nonstop
| Type | Range |
|---|---|
| Robin / Alpha Aviation / Apex R 2100, R 2112, R 2160, Alpha | 429 nm / 795 km |
| Robin / Alpha Aviation / Apex R 2100, R 2112, R 2160, Alpha | 429 nm / 795 km |
| Eurocopter / Aerospatiale AS 365 Dauphin / AS 565 Panther | 432 nm / 800 km |
| Agusta / AgustaWestland Grand (A109S) | 432 nm / 800 km |
| HAL, Hindustan Aeronautics Limited HF-24 Marut | 432 nm / 800 km |
| UTVA / Lola-Utva UTVA 75 | 432 nm / 800 km |
| Eurocopter / Aerospatiale AS 365 Dauphin / AS 565 Panther | 432 nm / 800 km |
| Koolhoven F.K.41 | 432 nm / 800 km |
| Morane-Saulnier M.S.406 | 432 nm / 800 km |
| Aeronca 50 Chief / 65 Super Chief / TC-65 Defender | 432 nm / 800 km |
| PZL Mielec TS-8 Bies | 432 nm / 800 km |
| WACO / WACO Classic YMF / YMF-5 | 432 nm / 800 km |
| WACO / WACO Classic YMF / YMF-5 | 432 nm / 800 km |
| Iljuschin / Ilyushin Il-10 | 432 nm / 800 km |
| Mil Mi-26 | 432 nm / 800 km |
| Junkers W 33 | 432 nm / 800 km |
| Koolhoven F.K.41 | 432 nm / 800 km |
| Mil Mi-14 | 432 nm / 800 km |
| Stinson 108 Voyager | 432 nm / 800 km |
| SOKO J-20 / P-2 Kraguj | 432 nm / 800 km |
Open SEA to HLN in the calculator · Return route HLN to SEA
Frequently asked questions
- How far is Seattle from Helena?
- The great circle distance between Seattle and Helena is 790 km (427 nm / 491 mi).
- How long is the flight from Seattle to Helena?
- A direct flight from SEA to HLN takes about 1h 14m, based on a typical jet cruise speed. Actual time varies by aircraft type and wind - see the aircraft list above for type-specific estimates.
- Is there a nonstop flight from Seattle to Helena?
- No scheduled nonstop service is currently listed for this route in our data.