Flight OddsUA308 ORD → ONT
United Airlines · Chicago, IL to Ontario, CA · 26 flights observed, 2025-09-25 to 2025-10-24 · 1,700 mi
UA308 covers more than one route in the data window — the stats below are for ORD → ONT, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-2 min
90th percentile
+31 min
Cancellation rate
0%
How often is UA308 on time?
Across 26 flights on ORD → ONT from 2025-09-25 to 2025-10-24, UA308 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +31 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 | 21 | 81% |
| 16-30 min | 2 | 8% |
| 31-60 min | 2 | 8% |
| 61-120 min | 1 | 4% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 5 | 80% | +5 min |
| 2025-10 | 21 | 81% | +4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 4 | 100% |
| Wed | 4 | 100% |
| Thu | 5 | 80% |
| Fri | 5 | 80% |
| Sat | No data | — |
| Sun | 4 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…