Flight OddsUA4278 IAD → RIC
United Airlines · Washington, DC to Richmond, VA · 28 flights observed, 2026-03-05 to 2026-06-24 · 100 mi
UA4278 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
74%
Median delay
-12 min
90th percentile
+44 min
Cancellation rate
4%
How often is UA4278 on time?
Across 28 flights on IAD → RIC from 2026-03-05 to 2026-06-24, UA4278 arrived within 15 minutes of schedule 74% of the time. The median arrival delay was -12 min, and the worst 10% of flights arrived +44 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 20 | 74% |
| 16-30 min | 1 | 4% |
| 31-60 min | 4 | 15% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 20 | 80% | +6 min |
| 2026-06 | 7 | 57% | +38 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 33% |
| Tue | 7 | 57% |
| Wed | 6 | 100% |
| Thu | 4 | 75% |
| Fri | 4 | 100% |
| Sat | No data | — |
| Sun | 3 | 67% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…