Flight OddsUA1503 SFO → ONT
United Airlines · San Francisco, CA to Ontario, CA · 24 flights observed, 2026-03-29 to 2026-04-28 · 363 mi
UA1503 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
92%
Median delay
-9 min
90th percentile
+10 min
Cancellation rate
0%
How often is UA1503 on time?
Across 24 flights on SFO → ONT from 2026-03-29 to 2026-04-28, UA1503 arrived within 15 minutes of schedule 92% of the time. The median arrival delay was -9 min, and the worst 10% of flights arrived +10 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 | 22 | 92% |
| 16-30 min | 1 | 4% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 100% | -7 min |
| 2026-04 | 21 | 90% | +6 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 5 | 100% |
| Tue | 5 | 100% |
| Wed | No data | — |
| Thu | 4 | 75% |
| Fri | 4 | 75% |
| Sat | 1 | 100% |
| Sun | 5 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…