WN4509 SeattleSEA · 12:40 Las VegasLAS · 15:25
WN4509 by Southwest Airlines flies from Seattle (SEA) to Las Vegas (LAS).
scheduled from SEA
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SEA and LAS 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 Las Vegas flights today
same route · Southwest AirlinesIf WN4509 is cancelled, these are the other Southwest Airlines nonstop flights from Seattle to Las Vegas 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 WN4509 actually runs
Pro Flight Search has tracked every published board update for WN4509 across the SEA and LAS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 1 completed leg so far: landed +1 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how WN4509 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 LAS published them.
Planning around WN4509? 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 — WN4509 Seattle to Las Vegas on-time performance, measured from the SEA and LAS airport boards.
https://proflightsearch.com/flight/WN4509
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