WN409 SeattleSEA DallasDAL
WN409 by Southwest Airlines flies from Seattle (SEA) to Dallas (DAL).
Same number through SEA → LAS → MDW → MKE → DAL
scheduled from SEA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and DAL 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Seattle to Dallas flights today
same route · Southwest AirlinesIf WN409 is cancelled, these are the other Southwest Airlines nonstop flights from Seattle to Dallas on the same day, with scheduled departure times in SEA local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN409 actually runs
Pro Flight Search has tracked every published board update for WN409 across the SEA and DAL boards: schedule changes, gate pushes and actual clocks. Combined risk score: 33.0/100. Based on airport operations, weather, and cached board history at SEA and DAL.
The verdict above is that record speaking, so it reflects how WN409 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SEA and DAL published them.
Planning around WN409? 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 — WN409 Seattle to Dallas on-time performance, measured from the SEA and DAL airport boards.
https://proflightsearch.com/flight/WN409
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