Flight OddsUA4538 ORD → CHA
United Airlines · Chicago, IL to Chattanooga, TN · 6 flights observed, 2026-02-16 to 2026-03-03 · 501 mi
UA4538 covers more than one route in the data window — the stats below are for ORD → CHA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
83%
Median delay
+10 min
90th percentile
+85 min
Cancellation rate
0%
How often is UA4538 on time?
Across 6 flights on ORD → CHA from 2026-02-16 to 2026-03-03, UA4538 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was +10 min, and the worst 10% of flights arrived +85 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 | 5 | 83% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 17% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-02 | 4 | 75% | +42 min |
| 2026-03 | 2 | 100% | -3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 3 | 67% |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | No data | — |
| 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…