UA3991United Airlines · BHM → IAH
live · 28m ago
Route confirmed United Airlines

UA3991 BirminghamBHM HoustonIAH

UA3991 by United Airlines flies from Birmingham (BHM) to Houston (IAH).

Right nowNext departure today Operates daily
10:35

scheduled from BHM

The route today

live boards
BHMBirminghamOn-time likelyBHM delay board →
IAHHoustonOn-time likelyIAH delay board →
BHM→IAHevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
35%Chance of 15+ min delay
1.1%Chance of cancellation
+11 minTypical airport delay in this weather

Conditions at BHM and IAH are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. These figures come from both airports' records 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 →

Tomorrow at BHM

Forecast

Fri 13 Nov, local date

High13°Clikely 11°C to 16°C
Low3°Clikely 2°C to 5°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at IAH

Forecast

Fri 13 Nov, local date

High25°Clikely 23°C to 26°C
Low11°Clikely 9°C to 12°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Birmingham to Houston flights today

same route · United Airlines
UA4008departs 06:30
UA4000departs 09:00
UA4681departs 11:00
UA4822departs 11:00
UA6280departs 11:00
UA4667departs 15:00

If UA3991 is cancelled, these are the other United Airlines nonstop flights from Birmingham to Houston on the same day, with scheduled departure times in BHM local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How UA3991 actually runs

Pro Flight Search has tracked every published board update for UA3991 across the BHM and IAH boards: schedule changes, gate pushes and actual clocks. Combined risk score: 8.5/100. Based on airport operations, weather, and cached board history at BHM and IAH.

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.

Planning around UA3991? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA3991 Birmingham to Houston on-time performance, measured from the BHM and IAH airport boards.

Canonical URL
https://proflightsearch.com/flight/UA3991
How we measure this →