Idaho Falls (IDA) to Seattle (SEA): On-Time Performance
Data through May 2026
Idaho Falls (IDA) to Seattle (SEA) is a thinner route than most in this dataset — 244 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 82% arrived on time.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 0.4%
- Flights/day
- 0.67
- last 12 months
- Duration
- 2h 7m
- scheduled
- Distance
- 566 mi
Monthly on-time trend
Best time to fly from IDA to SEA
Aim for departures around 3 p.m. (86% on-time); avoid 5 p.m. departures (63%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 89% | 16 min |
| Tuesday | 88% | 9 min |
| Wednesday | 79% | 12 min |
| Thursday | 77% | 9 min |
| Friday | 75% | 7 min |
| Saturday | 74% | 9 min |
| Sunday | 89% | 7 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft29%
- Airline operations55%
- National airspace system10%
- Weather6%
Frequently asked questions
- How often are flights from IDA to SEA delayed?
- 19% of IDA–SEA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 minutes.
- What is the best time of day to fly from IDA to SEA?
- Departures around 3 p.m. have the best record (86% 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 7m over 566 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are IDA to SEA flights cancelled?
- 0.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What day of the week is most reliable for IDA to SEA?
- Monday flights have the best record at 89% on-time. Day-of-week differences on this route are meaningful — Saturday trails at 74%.
Explore related pages
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Based on 244 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.