Flight OddsUA1665 ONT → SFO
United Airlines · Ontario, CA to San Francisco, CA · 71 flights observed, 2026-03-05 to 2026-05-20 · 363 mi
UA1665 covers more than one route in the data window — the stats below are for ONT → SFO, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
51%
Median delay
+14 min
90th percentile
+70 min
Cancellation rate
0%
How often is UA1665 on time?
Across 71 flights on ONT → SFO from 2026-03-05 to 2026-05-20, UA1665 arrived within 15 minutes of schedule 51% of the time. The median arrival delay was +14 min, and the worst 10% of flights arrived +70 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 | 36 | 51% |
| 16-30 min | 6 | 8% |
| 31-60 min | 19 | 27% |
| 61-120 min | 8 | 11% |
| 2+ hrs | 2 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 26 | 88% | -9 min |
| 2026-04 | 26 | 31% | +34 min |
| 2026-05 | 19 | 26% | +42 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 11 | 27% |
| Tue | 6 | 50% |
| Wed | 11 | 45% |
| Thu | 11 | 36% |
| Fri | 10 | 50% |
| Sat | 11 | 73% |
| Sun | 11 | 73% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…