Flight OddsUA4012 IAD → BUF
United Airlines · Washington, DC to Buffalo, NY · 11 flights observed, 2026-04-30 to 2026-05-18 · 283 mi
UA4012 covers more than one route in the data window — the stats below are for IAD → BUF, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
91%
Median delay
-22 min
90th percentile
-5 min
Cancellation rate
0%
How often is UA4012 on time?
Across 11 flights on IAD → BUF from 2026-04-30 to 2026-05-18, UA4012 arrived within 15 minutes of schedule 91% of the time. The median arrival delay was -22 min, and the worst 10% of flights arrived -5 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 | 10 | 91% |
| 16-30 min | 0 | 0% |
| 31-60 min | 0 | 0% |
| 61-120 min | 1 | 9% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-04 | 1 | 100% | -23 min |
| 2026-05 | 10 | 90% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 67% |
| Tue | No data | — |
| Wed | No data | — |
| Thu | 3 | 100% |
| Fri | 3 | 100% |
| Sat | No data | — |
| Sun | 2 | 100% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…