IDA to SEA flight delays
Idaho Falls, ID (IDA) Seattle, WA (SEA) · 566 miles
304 flights · January 2025 – August 2026 · US Bureau of Transportation Statistics
83.17%
Arrived on time
Within 15 minutes of schedule
0.33%
Cancelled
Share of scheduled flights
46 min
When late, late by
Average across delayed arrivals
9 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The route has been getting better. The later months in the record run 9.3 points more punctual than the earlier ones, which usually means a schedule that was too tight has been given more room.
Only SkyWest Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
This is a thin route — 304 flights across the whole period. On a route this infrequent a cancellation is far more costly than the rate suggests, because the next departure may not be the same day.
Flights from Idaho Falls to Seattle keep to schedule more reliably than most. On a route this punctual the day you fly matters more than the airline you pick.
Which airline should you fly on this route?
Over January 2025 – August 2026, SkyWest Airlines arrived on time most often on IDA to SEA. Flights ran closest to schedule in October and worst in March.
Every airline on IDA to SEA
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| SkyWest Airlines | 304 | 83.17% | 0.33% | 46 min | B |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
SEA to IDA Seattle back to Idaho Falls 81.13% on time BCommon questions
Are flights from Idaho Falls to Seattle usually delayed?
83.17% of flights on the IDA to SEA route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Idaho Falls to Seattle?
Only SkyWest Airlines appears in the published record on this route, with 304 flights and 83.17% arriving on time.
How often are IDA to SEA flights cancelled?
0.33% of scheduled flights did not operate — about 3 in every thousand. That is in the normal range.
What is the best month to fly Idaho Falls to Seattle?
June, when 90% of flights arrived on time. The worst was March at 74.1%.
When IDA to SEA flights are late, how late are they?
About 46 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on IDA to SEA during January 2025 – August 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →