Delta Air LinesDL
Flights DL3873 21:45 daily
live
Direct flights from Seattle (SEA) to Lewiston (LWS): 7 nonstop departures observed each week across 1 airline. The nonstop covers 419 km, an estimated 1 hour 2 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Lewiston. Updated 18 September 2026 at 20:37 UTC.
SEA
Seattle
busy · +24
LWS
Lewiston
tracking
419 km · ~1h 02m est.
Under pressure · 1 airline · 7x weekly · nonstop
68 / 100
route health from live SEA and LWS delay boards
Flight time~1h 02mestimated from route distance
Weekly departures7x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Delta Air Lines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysAirports right now
live boardsnext sweep in 120s
How the Seattle to Lewiston route actually runs
Pro Flight Search records official board updates for nonstop SEA to LWS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Seattle (SEA) to Lewiston (LWS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/SEA-LWS
SEA to LWS questions
Is SEA–LWS running on time right now?
Mostly on schedule. The departure side at SEA is the weaker end, route health score 68/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from SEA to LWS?
Great-circle distance is 419 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 60–66 min gate-to-gate on this route.
How often does SEA–LWS fly?
Delta Air Lines runs the route with about 7 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at SEA and arrival-side delay at LWS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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