Flight OddsUA552 SFO → ONT
United Airlines · San Francisco, CA to Ontario, CA · 163 flights observed, 2026-01-06 to 2026-06-30 · 363 mi
UA552 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
86%
Median delay
-5 min
90th percentile
+21 min
Cancellation rate
1%
How often is UA552 on time?
Across 163 flights on SFO → ONT from 2026-01-06 to 2026-06-30, UA552 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +21 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 139 | 86% |
| 16-30 min | 10 | 6% |
| 31-60 min | 8 | 5% |
| 61-120 min | 3 | 2% |
| 2+ hrs | 2 | 1% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 26 | 92% | +7 min |
| 2026-02 | 22 | 82% | -1 min |
| 2026-03 | 28 | 93% | -4 min |
| 2026-04 | 26 | 85% | +1 min |
| 2026-05 | 30 | 87% | -1 min |
| 2026-06 | 30 | 77% | +5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 83% |
| Tue | 18 | 83% |
| Wed | 24 | 88% |
| Thu | 25 | 84% |
| Fri | 25 | 96% |
| Sat | 22 | 91% |
| Sun | 24 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…