Idaho Falls (IDA) to Seattle (SEA): On-Time Performance
Data through July 2026
SkyWest Airlines effectively owns the IDA–SEA corridor, operating 100% of its flights and landing on time 84% of the time. That concentration hasn't hurt reliability: the route beats the national on-time average by 6 points (84% vs 78%).
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 8 min
- completed flights
- Cancelled
- 0.3%
- Flights/day
- 1.0
- last 12 months
- Duration
- 2h 6m
- scheduled
- Distance
- 566 mi
Monthly on-time trend
Best time to fly from IDA to SEA
Aim for departures around 7 a.m. (94% on-time); avoid 5 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 89% | 14 min |
| Tuesday | 83% | 9 min |
| Wednesday | 84% | 8 min |
| Thursday | 77% | 9 min |
| Friday | 82% | 6 min |
| Saturday | 82% | 7 min |
| Sundaybest | 90% | 6 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations53%
- National airspace system12%
- Weather7%
Frequently asked questions
- How often are flights from IDA to SEA delayed?
- 16% of IDA–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 8 minutes.
- What is the best time of day to fly from IDA to SEA?
- Departures around 7 a.m. have the best record (94% on-time), while departures around 5 p.m. have the worst (63%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from IDA to SEA?
- The scheduled IDA–SEA flight time averages 2h 6m over 566 miles. Actual arrival times vary — flights on this route land 15+ minutes late 16% of the time.
- How often are IDA to SEA flights cancelled?
- 0.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What day of the week is most reliable for IDA to SEA?
- Sunday flights have the best record at 90% on-time. Day-of-week differences on this route are meaningful — Thursday trails at 77%.
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Based on 366 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.