WN3770 SeattleSEA · 15:55 PortlandPDX · 17:45
WN3770 by Southwest Airlines flies from Seattle (SEA) to Portland (PDX).
Same number through SEA → SMF → PDX
scheduled from SEA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and PDX are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastSeattle to Sacramento with Southwest Airlines · Mon 2 Nov, local date
- Chance a departure is cancelled
- 0.2%2.3× usual
- Chance a departure leaves 60+ min late
- 8.2%1.0× usual
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · About 3 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Seattle to Portland flights today
same route · Southwest AirlinesIf WN3770 is cancelled, these are the other Southwest Airlines nonstop flights from Seattle to Portland on the same day, with scheduled departure times in SEA local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How WN3770 actually runs
Pro Flight Search has tracked every published board update for WN3770 across the SEA and PDX boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: landed +6 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN3770 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N220WN, N226WN, N458WN.
Board clocks recorded as SEA and PDX published them.
Planning around WN3770? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: WN3770 Seattle to Portland on-time performance, measured from the SEA and PDX airport boards.
https://proflightsearch.com/flight/WN3770
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