Helena (HLN) to Seattle (SEA) flights
Horizon Air flies nonstop from Helena Regional Airport to Seattle-Tacoma International Airport, with about 7 flights a week in July 2026. The 491-mile flight takes about 1h 51m gate to gate.
- Distance
- 491 mi · 790 km
- Flight time
- 1h 51m
- Airlines
- 1
- Seats filled
- 73%
Airlines flying HLN to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Horizon Air | 7 | Embraer E175 | 19,501 | 1h 51m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
HLN to SEA flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 5:09pm and the last at 5:11pm. Times are local and can change; check with the airline before you book.
| Flight | Departs | Arrives | Days flown in August 2026 | On time (12 months) |
|---|---|---|---|---|
| AS 2132Alaska Airlines · operated by Horizon Air | 5:09pm | 6:01pm | 18 | 59% |
| AS 2222Alaska Airlines · operated by Horizon Air | 5:11pm | 6:08pm | 13 | 76% |
Is HLN to SEA on time?
From September 2025 to August 2026, 75% of 364 flights arrived within 15 minutes of schedule and 1.1% were cancelled. Flights leaving around 4pm were the most punctual (81%), those around 5pm the least (60%). Most delay time was caused by late-arriving aircraft (61%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 364 | 75% | 16 min | 1.1% |
Airlines as sold: flights operated by regional partners count under the airline on the ticket. Average delay is across all completed flights, early arrivals counted as zero.
On-time arrivals by departure time
| Scheduled departure | Flights | On time, relative | On time |
|---|---|---|---|
| 4pm to 5pm | 95 | 81% | |
| 5pm to 6pm | 83 | 60% | |
| 6pm to 7pm | 176 | 80% | |
| 7pm to 8pm | 10 | 60% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 1,976 | |
| September 2025 | 30 | 1,916 | |
| October 2025 | 31 | 1,649 | |
| November 2025 | 29 | 1,340 | |
| December 2025 | 30 | 1,581 | |
| January 2026 | 31 | 1,385 | |
| February 2026 | 28 | 1,409 | |
| March 2026 | 29 | 1,560 | |
| April 2026 | 30 | 1,492 | |
| May 2026 | 30 | 1,778 | |
| June 2026 | 30 | 1,879 | |
| July 2026 | 31 | 2,035 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.