Flight OddsUA4577 ORD → TYS
United Airlines · Chicago, IL to Knoxville, TN · 30 flights observed, 2025-11-01 to 2025-12-01 · 475 mi
UA4577 covers more than one route in the data window — the stats below are for ORD → TYS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
52%
Median delay
+6 min
90th percentile
+87 min
Cancellation rate
10%
How often is UA4577 on time?
Across 30 flights on ORD → TYS from 2025-11-01 to 2025-12-01, UA4577 arrived within 15 minutes of schedule 52% of the time. The median arrival delay was +6 min, and the worst 10% of flights arrived +87 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 | 14 | 52% |
| 16-30 min | 4 | 15% |
| 31-60 min | 4 | 15% |
| 61-120 min | 4 | 15% |
| 2+ hrs | 1 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-11 | 26 | 54% | +60 min |
| 2025-12 | 1 | 0% | +39 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 25% |
| Tue | 4 | 50% |
| Wed | 4 | 25% |
| Thu | 3 | 100% |
| Fri | 4 | 50% |
| Sat | 4 | 100% |
| Sun | 4 | 25% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…