Flight OddsUA4039 SDF → IAD
United Airlines · Louisville, KY to Washington, DC · 16 flights observed, 2025-12-02 to 2025-12-17 · 451 mi
UA4039 covers more than one route in the data window — the stats below are for SDF → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
69%
Median delay
+2 min
90th percentile
+71 min
Cancellation rate
0%
How often is UA4039 on time?
Across 16 flights on SDF → IAD from 2025-12-02 to 2025-12-17, UA4039 arrived within 15 minutes of schedule 69% of the time. The median arrival delay was +2 min, and the worst 10% of flights arrived +71 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 | 11 | 69% |
| 16-30 min | 2 | 13% |
| 31-60 min | 1 | 6% |
| 61-120 min | 1 | 6% |
| 2+ hrs | 1 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 16 | 69% | +45 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 100% |
| Tue | 3 | 67% |
| Wed | 3 | 100% |
| Thu | 2 | 50% |
| Fri | 2 | 50% |
| Sat | 2 | 50% |
| Sun | 2 | 50% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…