UA4840United Airlines · IAH → BHM
live · 9m ago
Route confirmed United Airlines

UA4840 HoustonIAH BirminghamBHM

UA4840 by United Airlines flies from Houston (IAH) to Birmingham (BHM).

Right nowNext departure today Operates daily
12:15

scheduled from IAH

The route today

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

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
36%Chance of 15+ min delay
1.8%Chance of cancellation
+13 minTypical airport delay in this weather

Conditions at IAH and BHM 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 Houston

Forecast

Thu 5 Nov, local date

High27°Clikely 25°C to 29°C
Low13°Clikely 12°C to 15°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 Birmingham

Forecast

Thu 5 Nov, local date

High22°Clikely 20°C to 24°C
Low13°Clikely 12°C to 16°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 Houston to Birmingham flights today

same route · United Airlines
UA4231departs 07:35
UA4492departs 07:35
UA5485departs 07:35
UA6307departs 07:35
UA6115departs 12:15
UA4524departs 14:25

If UA4840 is cancelled, these are the other United Airlines nonstop flights from Houston to Birmingham on the same day, with scheduled departure times in IAH 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 UA4840 actually runs

Pro Flight Search has tracked every published board update for UA4840 across the IAH and BHM boards: schedule changes, gate pushes and actual clocks. Combined risk score: 50.0/100. Based on airport operations, weather, and cached board history at IAH and BHM.

The verdict above is that record speaking, so it reflects how UA4840 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Planning around UA4840? 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: UA4840 Houston to Birmingham on-time performance, measured from the IAH and BHM airport boards.

Canonical URL
https://proflightsearch.com/flight/UA4840
How we measure this →