WN3856 DenverDEN SeattleSEA
WN3856 by Southwest Airlines flies from Denver (DEN) to Seattle (SEA).
scheduled from DEN
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by DEN (Denver), currently flying VFR (visual). 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Denver to Seattle flights today
same route · Southwest AirlinesIf WN3856 is cancelled, these are the other Southwest Airlines nonstop flights from Denver to Seattle on the same day, with scheduled departure times in DEN local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN3856 actually runs
Pro Flight Search has tracked every published board update for WN3856 across the DEN and SEA boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at DEN and SEA.
The verdict above is that record speaking, so it reflects how WN3856 operates rather than what the timetable promises. Numbers refresh as new flights operate.
Planning around WN3856? 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 — WN3856 Denver to Seattle on-time performance, measured from the DEN and SEA airport boards.
https://proflightsearch.com/flight/WN3856
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