Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 3991 · Houston (IAH) → Tulsa (TUL)
Sold by United, flown by Mesa. Still flying: 40 of the last 56 days (Mon, Tue, Wed, Thu, Sun).
Arrives on time77%within 15 minutes, of 48 flights
Cancelled0.0%of scheduled flights
An hour or more late8%of flights that operated
When late, on average78 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves IAH
- 18:20
- Arrives TUL
- 20:00
- Flight time
- 1h 40m
- Days flown, last 8 weeks
- 40 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 IAH
All flights leaving Houston (IAH) at 6–7 pm, wherever they’re going: 74% left within 15 minutes and 1.1% were cancelled (21,103 flights in the year). Other United flights on this route →
Upcoming forecasts
This flight isn’t in our published forecasts for the next few days.