Flight OddsUA4063 IAD → SDF
United Airlines · Washington, DC to Louisville, KY · 135 flights observed, 2026-01-06 to 2026-05-20 · 451 mi
UA4063 covers more than one route in the data window — the stats below are for IAD → SDF, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
86%
Median delay
-13 min
90th percentile
+61 min
Cancellation rate
1%
How often is UA4063 on time?
Across 135 flights on IAD → SDF from 2026-01-06 to 2026-05-20, UA4063 arrived within 15 minutes of schedule 86% of the time. The median arrival delay was -13 min, and the worst 10% of flights arrived +61 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 114 | 86% |
| 16-30 min | 1 | 1% |
| 31-60 min | 4 | 3% |
| 61-120 min | 6 | 5% |
| 2+ hrs | 8 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 24 | 75% | +9 min |
| 2026-02 | 28 | 86% | +8 min |
| 2026-03 | 31 | 84% | +8 min |
| 2026-04 | 30 | 97% | -17 min |
| 2026-05 | 20 | 85% | +17 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 19 | 84% |
| Tue | 20 | 90% |
| Wed | 20 | 80% |
| Thu | 19 | 95% |
| Fri | 19 | 89% |
| Sat | 18 | 89% |
| Sun | 18 | 72% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…