Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
UA 1563 · Houston (IAH) → Ontario (ONT)
Sold by United. Still flying: 56 of the last 56 days (Daily).
Arrives on time79%within 15 minutes, of 324 flights
Cancelled0.0%of scheduled flights
An hour or more late9%of flights that operated
When late, on average66 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport (Ontario is 2 h behind Houston).
- Leaves IAH
- 20:31
- Arrives ONT
- 21:55
- Flight time
- 3h 24m
- Days flown, last 8 weeks
- 56 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 8–9 pm, wherever they’re going: 76% left within 15 minutes and 0.9% were cancelled (16,682 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.