Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 1634 · Houston (IAH) → Denver (DEN)
Sold by United. Still flying: 19 of the last 56 days.
Arrives on time67%within 15 minutes, of 24 flights
Cancelled0.0%of scheduled flights
An hour or more late21%of flights that operated
When late, on average117 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Denver is 1 h behind Houston).
- Leaves IAH
- 09:36
- Arrives DEN
- 11:12
- Flight time
- 2h 36m
- Days flown, last 8 weeks
- 19 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 9–10 am, wherever they’re going: 86% left within 15 minutes and 0.9% were cancelled (13,430 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.