Flight OddsUA3551 ORD → SDF
United Airlines · Chicago, IL to Louisville, KY · 318 flights observed, 2025-07-01 to 2026-05-20 · 286 mi
UA3551 covers more than one route in the data window — the stats below are for ORD → SDF, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
75%
Median delay
-6 min
90th percentile
+58 min
Cancellation rate
3%
How often is UA3551 on time?
Across 318 flights on ORD → SDF from 2025-07-01 to 2026-05-20, UA3551 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +58 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 231 | 75% |
| 16-30 min | 17 | 6% |
| 31-60 min | 32 | 10% |
| 61-120 min | 15 | 5% |
| 2+ hrs | 14 | 5% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 52% | +40 min |
| 2025-08 | 29 | 79% | +6 min |
| 2025-09 | 30 | 90% | -6 min |
| 2025-10 | 31 | 87% | -4 min |
| 2025-11 | 27 | 81% | +36 min |
| 2025-12 | 31 | 58% | +21 min |
| 2026-01 | 30 | 67% | +8 min |
| 2026-02 | 28 | 82% | -6 min |
| 2026-03 | 30 | 67% | +29 min |
| 2026-04 | 24 | 79% | +7 min |
| 2026-05 | 20 | 85% | -4 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 44 | 68% |
| Tue | 46 | 76% |
| Wed | 47 | 77% |
| Thu | 44 | 70% |
| Fri | 44 | 84% |
| Sat | 39 | 79% |
| Sun | 45 | 69% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…