Flight OddsUA397 ONT → IAH
United Airlines · Ontario, CA to Houston, TX · 31 flights observed, 2025-07-01 to 2025-07-31 · 1,334 mi
UA397 covers more than one route in the data window — the stats below are for ONT → IAH, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
+2 min
90th percentile
+45 min
Cancellation rate
0%
How often is UA397 on time?
Across 31 flights on ONT → IAH from 2025-07-01 to 2025-07-31, UA397 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +45 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 25 | 81% |
| 16-30 min | 2 | 6% |
| 31-60 min | 2 | 6% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 81% | +25 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 5 | 60% |
| Wed | 5 | 80% |
| Thu | 5 | 100% |
| Fri | 4 | 100% |
| Sat | 4 | 100% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…