Flight OddsUA4439 DAY → ORD
United Airlines · Dayton, OH to Chicago, IL · 86 flights observed, 2025-07-01 to 2025-09-24 · 240 mi
UA4439 covers more than one route in the data window — the stats below are for DAY → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
75%
Median delay
-8 min
90th percentile
+81 min
Cancellation rate
1%
How often is UA4439 on time?
Across 86 flights on DAY → ORD from 2025-07-01 to 2025-09-24, UA4439 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +81 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 | 64 | 75% |
| 16-30 min | 7 | 8% |
| 31-60 min | 2 | 2% |
| 61-120 min | 6 | 7% |
| 2+ hrs | 6 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 63% | +37 min |
| 2025-08 | 31 | 84% | +4 min |
| 2025-09 | 24 | 79% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 12 | 75% |
| Tue | 13 | 100% |
| Wed | 13 | 62% |
| Thu | 12 | 75% |
| Fri | 11 | 73% |
| Sat | 12 | 58% |
| Sun | 12 | 83% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…