SEA to LWS flight delays
Seattle, WA (SEA) Lewiston, ID (LWS) · 262 miles
729 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
90.9%
Arrived on time
Within 15 minutes of schedule
0.41%
Cancelled
Share of scheduled flights
65 min
When late, late by
Average across delayed arrivals
6 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In January it ran 22.6 points more punctual than in August — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
Flights from Seattle to Lewiston are among the most dependable in the record. A route this punctual is usually a short hop between airports with slots to spare.
This route does better than its own airport. Departures from SEA overall run 11.4 points less punctual than this particular one — so whatever congestion SEA has, this route is largely escaping it.
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.
Which airline should you fly on this route?
Over July 2024 – July 2026, SkyWest Airlines arrived on time most often on SEA to LWS. Flights ran closest to schedule in January and worst in August.
Every airline on SEA to LWS
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 | 729 | 90.9% | 0.41% | 65 min | A |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
LWS to SEA Lewiston back to Seattle 90.44% on time AOther routes from Seattle
Common questions
Are flights from Seattle to Lewiston usually delayed?
90.9% of flights on the SEA to LWS route arrived within 15 minutes of schedule, so roughly 1 in every ten arrived late. That is better than the average route in this record.
Which airlines fly from Seattle to Lewiston?
Only SkyWest Airlines appears in the published record on this route, with 729 flights and 90.9% arriving on time.
How often are SEA to LWS flights cancelled?
0.41% of scheduled flights did not operate — about 4 in every thousand. That is in the normal range.
What is the best month to fly Seattle to Lewiston?
January, when 100% of flights arrived on time. The worst was August at 77.4%.
When SEA to LWS flights are late, how late are they?
About 65 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 SEA to LWS during July 2024 – July 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 →