Flight OddsUA4858 IAD → DAY
United Airlines · Washington, DC to Dayton, OH · 130 flights observed, 2025-10-26 to 2026-03-04 · 367 mi
UA4858 covers more than one route in the data window — the stats below are for IAD → DAY, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
76%
Median delay
-5 min
90th percentile
+45 min
Cancellation rate
2%
How often is UA4858 on time?
Across 130 flights on IAD → DAY from 2025-10-26 to 2026-03-04, UA4858 arrived within 15 minutes of schedule 76% of the time. The median arrival delay was -5 min, and the worst 10% of flights arrived +45 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 | 97 | 76% |
| 16-30 min | 12 | 9% |
| 31-60 min | 8 | 6% |
| 61-120 min | 2 | 2% |
| 2+ hrs | 8 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 67% | +23 min |
| 2025-11 | 29 | 79% | +16 min |
| 2025-12 | 31 | 65% | +19 min |
| 2026-01 | 29 | 69% | +18 min |
| 2026-02 | 28 | 93% | -9 min |
| 2026-03 | 4 | 100% | -5 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 18 | 78% |
| Tue | 19 | 74% |
| Wed | 19 | 79% |
| Thu | 17 | 82% |
| Fri | 18 | 78% |
| Sat | 18 | 72% |
| Sun | 18 | 72% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…