Flight OddsUA4390 CHA → ORD
United Airlines · Chattanooga, TN to Chicago, IL · 30 flights observed, 2025-07-01 to 2025-07-31 · 501 mi
UA4390 covers more than one route in the data window — the stats below are for CHA → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
45%
Median delay
+19 min
90th percentile
+193 min
Cancellation rate
3%
How often is UA4390 on time?
Across 30 flights on CHA → ORD from 2025-07-01 to 2025-07-31, UA4390 arrived within 15 minutes of schedule 45% of the time. The median arrival delay was +19 min, and the worst 10% of flights arrived +193 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 13 | 45% |
| 16-30 min | 3 | 10% |
| 31-60 min | 5 | 17% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 6 | 21% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 45% | +60 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 50% |
| Tue | 5 | 80% |
| Wed | 5 | 40% |
| Thu | 5 | 40% |
| Fri | 2 | 0% |
| Sat | 4 | 25% |
| Sun | 4 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…