Flight OddsUA4339 IAD → ROA
United Airlines · Washington, DC to Roanoke, VA · 286 flights observed, 2025-07-01 to 2026-05-20 · 177 mi
UA4339 covers more than one route in the data window — the stats below are for IAD → ROA, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
81%
Median delay
-8 min
90th percentile
+39 min
Cancellation rate
3%
How often is UA4339 on time?
Across 286 flights on IAD → ROA from 2025-07-01 to 2026-05-20, UA4339 arrived within 15 minutes of schedule 81% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +39 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 | 223 | 81% |
| 16-30 min | 20 | 7% |
| 31-60 min | 11 | 4% |
| 61-120 min | 14 | 5% |
| 2+ hrs | 9 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 65% | +36 min |
| 2025-08 | 31 | 81% | +39 min |
| 2025-09 | 30 | 80% | +11 min |
| 2025-10 | 31 | 87% | -1 min |
| 2025-11 | 29 | 83% | +2 min |
| 2025-12 | 31 | 71% | +3 min |
| 2026-01 | 5 | 100% | -11 min |
| 2026-02 | 16 | 88% | -2 min |
| 2026-03 | 29 | 69% | +32 min |
| 2026-04 | 30 | 97% | -18 min |
| 2026-05 | 19 | 84% | -9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 41 | 68% |
| Tue | 39 | 79% |
| Wed | 39 | 79% |
| Thu | 40 | 88% |
| Fri | 39 | 72% |
| Sat | 40 | 95% |
| Sun | 39 | 82% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…