Flight OddsUA2661 SFO → ONT
United Airlines · San Francisco, CA to Ontario, CA · 133 flights observed, 2026-02-12 to 2026-06-30 · 363 mi
UA2661 covers more than one route in the data window — the stats below are for SFO → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
77%
Median delay
+1 min
90th percentile
+29 min
Cancellation rate
0%
How often is UA2661 on time?
Across 133 flights on SFO → ONT from 2026-02-12 to 2026-06-30, UA2661 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +29 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 | 102 | 77% |
| 16-30 min | 19 | 14% |
| 31-60 min | 8 | 6% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 3 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 17 | 59% | +25 min |
| 2026-03 | 31 | 87% | -6 min |
| 2026-04 | 30 | 70% | +17 min |
| 2026-05 | 25 | 80% | +5 min |
| 2026-06 | 30 | 80% | +2 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 20 | 70% |
| Tue | 17 | 76% |
| Wed | 16 | 88% |
| Thu | 20 | 70% |
| Fri | 20 | 85% |
| Sat | 20 | 70% |
| Sun | 20 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…