UA2156 WashingtonIAD · 12:55 Las VegasLAS · 14:59
UA2156 by United Airlines flies from Washington (IAD) to Las Vegas (LAS) for the Sun, Sep 20 departure.
arrival expected at LAS · on schedule
board checked 8m ago · checking again in 45s
Where the minutes go
last 3 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 IAD 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 Washington to Las Vegas flights today
same route · United AirlinesIf UA2156 is cancelled, these are the other United Airlines nonstop flights from Washington to Las Vegas on the same day, with scheduled departure times in IAD local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA2156 actually runs
Pro Flight Search has tracked every published board update for UA2156 across the IAD and LAS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: departed +16 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA2156 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: N17233, N37252.
Board clocks recorded as IAD and LAS published them.
Planning around UA2156? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA2156 Washington to Las Vegas on-time performance, measured from the IAD and LAS airport boards.
https://proflightsearch.com/flight/UA2156
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