Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
70 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → Helena
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportHLNHelenaHelena Regional Airport
HelenaHelena Regional Airport- Distance
- 490 mi
- Estimated flight time
- ~1h 30m
Helena is currently 1 hour ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 1
- busiest month · Jun
- 1 hr 9 min
- measured flight time
- 2 / 12
- months seen
Through the year
Per day, month by month
- –Jan2026
- –Feb
- –Mar
- –Apr
- –May
- 1Jun
- 1Jul
- –Aug
- –Sep
- –Oct2025
- –Nov
- –Dec
Airlines
Who flies it
Horizon Airnow and then
Through the day
Departure times
Local time in Seattle. Most departures between 13:00 and 16:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 0.1Mon
- 0.1Tue
- 0Wed
- 0Thu
- 0.1Fri
- 0Sat
- 0.1Sun
Fleet
Aircraft observed
- Embraer 175E75L95%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | Not seen in this month. | ||
| February 2026 | Not seen in this month. | ||
| March 2026 | Not seen in this month. | ||
| April 2026 | Not seen in this month. | ||
| May 2026 | Not seen in this month. | ||
| June 2026 | 1 | 7 |
|
| July 2026 | 1 | 15 |
|
| August 2026 | Not seen in this month. | ||
| September 2026 | Not seen in this month. | ||
| October 2025 | Not seen in this month. | ||
| November 2025 | Not seen in this month. | ||
| December 2025 | Not seen in this month. | ||
Airlines observed on this route
From observed callsign routes on SEA-HLN - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- Direct destinations observed from Seattle: 132.
- Direct destinations observed from Helena: 2.
The airports on this route
Helena Regional Airport
Helena, United StatesHLN / KHLN
Regional airport · 2 direct destinations · 3 runways · longest runway 8,999 ft
52 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Seattle to Helena
The observed direct connection between Seattle–Tacoma International Airport (SEA) and Helena Regional Airport (HLN) covers approximately 490 mi. The estimated flight time is around 1h 30m. Horizon Air has been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from Helena by air?
- The great-circle distance between Seattle–Tacoma International Airport and Helena Regional Airport is approximately 490 mi.
- How long is the flight from Seattle to Helena?
- Based on the distance, the estimated flight time is about 1h 30m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to Helena?
- Yes, a direct connection between SEA and HLN has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Horizon Air.
- How often is there a flight from Seattle to Helena?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 22 observed flights. Mainly Horizon Air. That is an observation, not a timetable.
- What is the current time difference between Seattle and Helena?
- Helena is currently 1 hour ahead of Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.