Flight OddsUA4866 ROA → IAD
United Airlines · Roanoke, VA to Washington, DC · 204 flights observed, 2025-07-03 to 2026-04-29 · 177 mi
UA4866 covers more than one route in the data window — the stats below are for ROA → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
88%
Median delay
-15 min
90th percentile
+24 min
Cancellation rate
2%
How often is UA4866 on time?
Across 204 flights on ROA → IAD from 2025-07-03 to 2026-04-29, UA4866 arrived within 15 minutes of schedule 88% of the time. The median arrival delay was -15 min, and the worst 10% of flights arrived +24 min or later. 2% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 175 | 88% |
| 16-30 min | 7 | 4% |
| 31-60 min | 6 | 3% |
| 61-120 min | 6 | 3% |
| 2+ hrs | 6 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 15 | 67% | +13 min |
| 2025-08 | 24 | 79% | +6 min |
| 2025-09 | 30 | 87% | +37 min |
| 2025-10 | 31 | 94% | -17 min |
| 2025-11 | 27 | 93% | -11 min |
| 2025-12 | 15 | 93% | -12 min |
| 2026-01 | 5 | 100% | -23 min |
| 2026-03 | 24 | 75% | +42 min |
| 2026-04 | 29 | 100% | -12 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 24 | 83% |
| Tue | 24 | 100% |
| Wed | 25 | 88% |
| Thu | 32 | 88% |
| Fri | 30 | 83% |
| Sat | 33 | 91% |
| Sun | 32 | 81% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…