Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 3991 · Birmingham (BHM) → Houston (IAH)
Sold by United, flown by Mesa. Not in the Jun 6 – Jul 31, 2026 schedule; last flew 2026-05-20.
Arrives on time74%within 15 minutes, of 35 flights
Cancelled0.0%of scheduled flights
An hour or more late3%of flights that operated
When late, on average59 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves BHM
- 15:00
- Arrives IAH
- 17:12
- Flight time
- 2h 12m
- Days flown, last 8 weeks
- 0 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at BHM
All flights leaving Birmingham (BHM) at 3–4 pm, wherever they’re going: 75% left within 15 minutes and 1.1% were cancelled (1,334 flights in the year). Other United flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.