Flight OddsUA4540 SDF → ORD
United Airlines · Louisville, KY to Chicago, IL · 16 flights observed, 2025-12-02 to 2025-12-17 · 286 mi
UA4540 covers more than one route in the data window — the stats below are for SDF → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
53%
Median delay
+15 min
90th percentile
+122 min
Cancellation rate
6%
How often is UA4540 on time?
Across 16 flights on SDF → ORD from 2025-12-02 to 2025-12-17, UA4540 arrived within 15 minutes of schedule 53% of the time. The median arrival delay was +15 min, and the worst 10% of flights arrived +122 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 8 | 53% |
| 16-30 min | 1 | 7% |
| 31-60 min | 0 | 0% |
| 61-120 min | 4 | 27% |
| 2+ hrs | 2 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 15 | 53% | +52 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 3 | 67% |
| Wed | 3 | 67% |
| Thu | 2 | 50% |
| Fri | 2 | 50% |
| Sat | 2 | 50% |
| Sun | 1 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…