Flight OddsUA4559 SDF → ORD
United Airlines · Louisville, KY to Chicago, IL · 13 flights observed, 2026-05-01 to 2026-05-20 · 286 mi
UA4559 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
75%
Median delay
-2 min
90th percentile
+122 min
Cancellation rate
8%
How often is UA4559 on time?
Across 13 flights on SDF → ORD from 2026-05-01 to 2026-05-20, UA4559 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -2 min, and the worst 10% of flights arrived +122 min or later. 8% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 9 | 75% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 8% |
| 2+ hrs | 2 | 17% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 12 | 75% | +19 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | No data | — |
| Wed | 3 | 67% |
| Thu | 2 | 50% |
| Fri | 3 | 100% |
| Sat | No data | — |
| Sun | 2 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…