Flight OddsUA4391 ORD → DAY
United Airlines · Chicago, IL to Dayton, OH · 7 flights observed, 2026-04-30 to 2026-05-19 · 240 mi
UA4391 covers more than one route in the data window — the stats below are for ORD → DAY, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
+1 min
90th percentile
+57 min
Cancellation rate
0%
How often is UA4391 on time?
Across 7 flights on ORD → DAY from 2026-04-30 to 2026-05-19, UA4391 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was +1 min, and the worst 10% of flights arrived +57 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 | 6 | 86% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 14% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 1 | 100% | -16 min |
| 2026-05 | 6 | 83% | +20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 3 | 67% |
| Wed | No data | — |
| Thu | 1 | 100% |
| Fri | No data | — |
| Sat | 3 | 100% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…