Flight OddsUnited Airlines · Greensboro/High Point, NC to Washington, DC · 146 flights observed, 2025-07-01 to 2026-06-30 · 239 mi
UA4251 covers more than one route in the data window — the stats below are for GSO → IAD, the one it has flown most recently. The others are linked under “Other routes”.
How often is UA4251 on time?
Across 146 flights on GSO → IAD from 2025-07-01 to 2026-06-30, UA4251 arrived within 15 minutes of schedule 93% of the time. The median arrival delay was -14 min, and the worst 10% of flights arrived +7 min or later. 1% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 135 | 93% |
| 16-30 min | 2 | 1% |
| 31-60 min | 2 | 1% |
| 61-120 min | 1 | 1% |
| 2+ hrs | 5 | 3% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 30 | 97% | -4 min |
| 2025-08 | 27 | 100% | -15 min |
| 2025-09 | 22 | 91% | -7 min |
| 2025-10 | 25 | 96% | -13 min |
| 2026-05 | 11 | 82% | +43 min |
| 2026-06 | 30 | 87% | +36 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 22 | 95% |
| Tue | 17 | 94% |
| Wed | 15 | 87% |
| Thu | 23 | 87% |
| Fri | 23 | 100% |
| Sat | 23 | 96% |
| Sun | 22 | 91% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…