Great Falls (GTF) to Seattle (SEA) flights
Horizon Air flies nonstop from Great Falls International Airport to Seattle-Tacoma International Airport, with about 7 flights a week in July 2026. The 512-mile flight takes about 1h 49m gate to gate.
- Distance
- 512 mi · 824 km
- Flight time
- 1h 49m
- Airlines
- 1
- Seats filled
- 79%
Airlines flying GTF to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| Horizon Air | 7 | Embraer E175 | 15,748 | 1h 48m |
| SkyWest AirlinesSeasonal or ended | n/a | Embraer E175 | 6,050 | 1h 50m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
GTF to SEA flight schedule
2 flight numbers flew this route in August 2026. The first usually leaves at 5:09pm and the last at 5:18pm. 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 2310Alaska Airlines · operated by Horizon Air | 5:09pm | 5:59pm | 18 | 71% |
| AS 2444Alaska Airlines · operated by Horizon Air | 5:18pm | 6:07pm | 13 | 77% |
Is GTF to SEA on time?
From September 2025 to August 2026, 77% of 364 flights arrived within 15 minutes of schedule and 0.8% were cancelled. Flights leaving around 5pm were the most punctual (78%), those around 7pm the least (72%). Most delay time was caused by late-arriving aircraft (56%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 364 | 77% | 13 min | 0.8% |
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 | 58 | 74% | |
| 5pm to 6pm | 154 | 78% | |
| 6pm to 7pm | 106 | 78% | |
| 7pm to 8pm | 46 | 72% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 31 | 2,064 | |
| September 2025 | 30 | 1,820 | |
| October 2025 | 31 | 1,796 | |
| November 2025 | 29 | 1,576 | |
| December 2025 | 31 | 1,925 | |
| January 2026 | 31 | 1,634 | |
| February 2026 | 28 | 1,588 | |
| March 2026 | 29 | 1,703 | |
| April 2026 | 30 | 1,642 | |
| May 2026 | 31 | 1,897 | |
| June 2026 | 30 | 1,970 | |
| July 2026 | 31 | 2,183 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.