UA643 Las VegasLAS · 06:00 HoustonIAH · 07:40
UA643 by United Airlines flies from Las Vegas (LAS) to Houston (IAH) for the Wed, Sep 9 departure.
Same number through LAS → SFO → SNA → IAH
estimated arrival at IAH · local time · ~2h 49m from now
position updated 4m ago · checking again in 90s
Live position · flown path, last 5h 58m
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 LAS and IAH 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 Houston flights today
same route · United AirlinesIf UA643 is cancelled, these are the other United Airlines nonstop flights from Las Vegas to Houston 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 UA643 actually runs
Pro Flight Search has tracked every published board update for UA643 across the LAS and IAH boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 3 completed legs so far: left right on schedule but landed about 22 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA643 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 LAS and IAH published them.
Planning around UA643? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — UA643 Las Vegas to Houston on-time performance, measured from the LAS and IAH airport boards.
https://proflightsearch.com/flight/UA643
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