Flight OddsUA4581 CHA → ORD
United Airlines · Chattanooga, TN to Chicago, IL · 20 flights observed, 2026-04-30 to 2026-05-19 · 501 mi
UA4581 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
72%
Median delay
+6 min
90th percentile
+49 min
Cancellation rate
10%
How often is UA4581 on time?
Across 20 flights on CHA → ORD from 2026-04-30 to 2026-05-19, UA4581 arrived within 15 minutes of schedule 72% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +49 min or later. 10% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 13 | 72% |
| 16-30 min | 2 | 11% |
| 31-60 min | 1 | 6% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 1 | 100% | +1 min |
| 2026-05 | 17 | 71% | +14 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 1 | 100% |
| Tue | 3 | 67% |
| Wed | 2 | 100% |
| Thu | 3 | 33% |
| Fri | 3 | 67% |
| Sat | 3 | 100% |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…