Idaho Falls (IDA) to Seattle (SEA) flights
SkyWest Airlines flies nonstop from Idaho Falls Regional Airport to Seattle-Tacoma International Airport, with about 14 flights a week in July 2026. The 566-mile flight takes about 2h 0m gate to gate.
- Distance
- 566 mi · 911 km
- Flight time
- 2h 0m
- Airlines
- 1
- Seats filled
- 84%
Airlines flying IDA to SEA
| Airline | Flights a week | Aircraft | Passengers (12 months) | Flight time |
|---|---|---|---|---|
| SkyWest Airlines | 14 | Embraer E175 | 23,175 | 2h 3m |
| Horizon AirSeasonal or ended | n/a | Embraer E175 | 22,509 | 1h 56m |
Airlines are the operating carrier: regional airlines such as SkyWest or Horizon often fly under a larger airline's brand.
IDA to SEA flight schedule
4 flight numbers flew this route in August 2026. The first usually leaves at 6:18am 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 3423Alaska Airlines · operated by SkyWest Airlines | 6:18am | 7:20am | 13 | 86% |
| AS 3054Alaska Airlines · operated by SkyWest Airlines | 7:15am | 8:21am | 18 | 93% |
| AS 3489Alaska Airlines · operated by SkyWest Airlines | 1:43pm | 2:48pm | 18 | 76% |
| AS 3027Alaska Airlines · operated by SkyWest Airlines | 2:01pm | 3:07pm | 13 | 79% |
Is IDA to SEA on time?
From September 2025 to August 2026, 84% of 721 flights arrived within 15 minutes of schedule and 0.4% were cancelled. Flights leaving around 7am were the most punctual (93%), those around 5pm the least (68%). Most delay time was caused by the airline (crew, maintenance, cleaning, fuelling) (47%).
| Airline | Flights | On time | Average delay | Cancelled |
|---|---|---|---|---|
| Alaska Airlines | 721 | 84% | 9 min | 0.4% |
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 |
|---|---|---|---|
| 6am to 7am | 217 | 88% | |
| 7am to 8am | 70 | 93% | |
| 8am to 9am | 34 | 94% | |
| 9am to 10am | 36 | 83% | |
| 1pm to 2pm | 98 | 79% | |
| 2pm to 3pm | 25 | 76% | |
| 3pm to 4pm | 77 | 81% | |
| 4pm to 5pm | 64 | 86% | |
| 5pm to 6pm | 64 | 68% | |
| 6pm to 7pm | 36 | 92% |
Flights by month
| Month | Flights | Flights, relative | Passengers |
|---|---|---|---|
| August 2025 | 62 | 4,227 | |
| September 2025 | 60 | 4,020 | |
| October 2025 | 62 | 4,193 | |
| November 2025 | 58 | 3,511 | |
| December 2025 | 55 | 3,460 | |
| January 2026 | 62 | 3,565 | |
| February 2026 | 55 | 3,313 | |
| March 2026 | 60 | 3,716 | |
| April 2026 | 60 | 3,720 | |
| May 2026 | 62 | 3,984 | |
| June 2026 | 60 | 3,763 | |
| July 2026 | 62 | 4,212 |
Related
Source: US Department of Transportation, T-100 Segment data, August 2025 to July 2026.