WN4555 Las VegasLAS · 09:20 WashingtonDCA · 17:00
WN4555 by Southwest Airlines flies from Las Vegas (LAS) to Washington (DCA) for the Wed, Sep 16 departure.
departs LAS · on schedule
board checked 25m ago · checking again in 45s
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at LAS and DCA 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 Las Vegas to Washington flights today
same route · Southwest AirlinesIf WN4555 is cancelled, these are the other Southwest Airlines nonstop flights from Las Vegas to Washington on the same day, with scheduled departure times in LAS local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How WN4555 actually runs
Pro Flight Search has tracked every published board update for WN4555 across the LAS and DCA boards: schedule changes, gate pushes and actual clocks. Usually lands on time. Based on 4 confirmed landings · 4/4 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how WN4555 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: N8959Q, N8651A, N8605E.
Board clocks recorded as LAS and DCA published them.
Planning around WN4555? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — WN4555 Las Vegas to Washington on-time performance, measured from the LAS and DCA airport boards.
https://proflightsearch.com/flight/WN4555
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