WN3974 SacramentoSMF · 19:55 SeattleSEA · 21:55
WN3974 by Southwest Airlines flies from Sacramento (SMF) to Seattle (SEA) for the Wed, Oct 28 departure.
arrival expected at SEA · 14 min early
board checked 34m ago · checking again in 45s
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −14 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SMF and SEA are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, 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
ForecastSacramento to Seattle with Southwest Airlines · Thu 29 Oct, local date
- Chance a departure leaves 60+ min late
- 7.4%1.2× usual
Forecast weather: 96% chance of rain at Seattle
No cancellation outlook here: this airport's board does not publish cancellations reliably.
Forecast: WeatherTomorrow · 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 Sacramento to Seattle flights today
same route · Southwest AirlinesIf WN3974 is cancelled, these are the other Southwest Airlines nonstop flights from Sacramento to Seattle on the same day, with scheduled departure times in SMF local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN3974 actually runs
Pro Flight Search has tracked every published board update for WN3974 across the SMF and SEA boards: schedule changes, gate pushes and actual clocks. Usually departs on time. Based on 4 confirmed departures · 3/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how WN3974 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: N950WN, N291WN, N919WN.
Board clocks recorded as SMF and SEA published them.
Planning around WN3974? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN3974 Sacramento to Seattle on-time performance, measured from the SMF and SEA airport boards.
https://proflightsearch.com/flight/WN3974
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