Seattle (SEA) to Great Falls (GTF) flights
Horizon Air flies nonstop from Seattle-Tacoma International Airport to Great Falls International Airport, with about 7 flights a week in July 2026. The 512-mile flight takes about 1h 33m gate to gate.
- Distance
- 512 mi · 824 km
- Flight time
- 1h 33m
- Airlines
- 1
- Seats filled
- 83%
Airlines flying SEA to GTF
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Horizon Air | 7 | Embraer E175 | 16,312 | 1h 32m |
| SkyWest AirlinesSeasonal or ended | n/a | Embraer E175 | 6,496 | 1h 36m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
SEA to GTF flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 1:53pm and the last at 2:01pm. 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 2311Alaska Airlines · operated by Horizon Air | 1:53pm | 4:29pm | 18 | 66% |
| AS 2444Alaska Airlines · operated by Horizon Air | 2:01pm | 4:38pm | 13 | 84% |
Is SEA to GTF on time?
From September 2025 to August 2026, 79% of 364 flights arrived within 15 minutes of schedule and 0.5% were cancelled. Flights leaving around 2pm were the most punctual (87%), those around 1pm the least (75%). Most delay time was caused by late-arriving aircraft (41%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 364 | 79% | 10 min | 0.5% |
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 |
|---|---|---|---|
| 1pm to 2pm | 163 | 75% | |
| 2pm to 3pm | 70 | 87% | |
| 3pm to 4pm | 85 | 79% | |
| 4pm to 5pm | 46 | 80% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 2,106 | |
| September 2025 | 30 | 2,000 | |
| October 2025 | 31 | 1,931 | |
| November 2025 | 29 | 1,630 | |
| December 2025 | 32 | 2,039 | |
| January 2026 | 31 | 1,775 | |
| February 2026 | 28 | 1,658 | |
| March 2026 | 29 | 1,754 | |
| April 2026 | 30 | 1,814 | |
| May 2026 | 31 | 1,985 | |
| June 2026 | 30 | 2,032 | |
| July 2026 | 31 | 2,084 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.