Flight OddsUA4577 IAD → RIC
United Airlines · Washington, DC to Richmond, VA · 103 flights observed, 2025-07-02 to 2025-10-23 · 100 mi
UA4577 covers more than one route in the data window — the stats below are for IAD → RIC, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
84%
Median delay
-8 min
90th percentile
+43 min
Cancellation rate
0%
How often is UA4577 on time?
Across 103 flights on IAD → RIC from 2025-07-02 to 2025-10-23, UA4577 arrived within 15 minutes of schedule 84% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +43 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 | 86 | 84% |
| 16-30 min | 3 | 3% |
| 31-60 min | 5 | 5% |
| 61-120 min | 4 | 4% |
| 2+ hrs | 4 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 29 | 90% | +2 min |
| 2025-08 | 31 | 87% | +5 min |
| 2025-09 | 25 | 88% | +17 min |
| 2025-10 | 17 | 65% | +9 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 16 | 63% |
| Tue | 16 | 81% |
| Wed | 17 | 88% |
| Thu | 17 | 94% |
| Fri | 12 | 92% |
| Sat | 11 | 100% |
| Sun | 13 | 77% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…