UA3991 HoustonIAH · 18:20 TulsaTUL · 19:37
UA3991 by United Airlines flies from Houston (IAH) to Tulsa (TUL) for the Sat, Sep 12 departure.
departs IAH · on schedule
board checked 27m 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 IAH and TUL 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 Houston to Tulsa flights today
same route · United AirlinesIf UA3991 is cancelled, these are the other United Airlines nonstop flights from Houston to Tulsa on the same day, with scheduled departure times in IAH local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How UA3991 actually runs
Pro Flight Search has tracked every published board update for UA3991 across the IAH and TUL boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: landed +97 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how UA3991 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: N89308.
Board clocks recorded as IAH and TUL published them.
Planning around UA3991? 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 — UA3991 Houston to Tulsa on-time performance, measured from the IAH and TUL airport boards.
https://proflightsearch.com/flight/UA3991
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