Flight OddsUA4521 IAD → CVG
United Airlines · Washington, DC to Cincinnati, OH · 85 flights observed, 2026-03-29 to 2026-06-30 · 388 mi
UA4521 covers more than one route in the data window — the stats below are for IAD → CVG, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-11 min
90th percentile
+28 min
Cancellation rate
0%
How often is UA4521 on time?
Across 85 flights on IAD → CVG from 2026-03-29 to 2026-06-30, UA4521 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +28 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 | 71 | 84% |
| 16-30 min | 6 | 7% |
| 31-60 min | 2 | 2% |
| 61-120 min | 3 | 4% |
| 2+ hrs | 3 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 3 | 100% | -11 min |
| 2026-04 | 30 | 73% | -2 min |
| 2026-05 | 26 | 92% | +9 min |
| 2026-06 | 26 | 85% | +5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 14 | 86% |
| Tue | 14 | 86% |
| Wed | 12 | 75% |
| Thu | 13 | 85% |
| Fri | 13 | 77% |
| Sat | 5 | 80% |
| Sun | 14 | 93% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…