Flight OddsUA4270 BUF → IAD
United Airlines · Buffalo, NY to Washington, DC · 205 flights observed, 2025-07-01 to 2026-06-30 · 283 mi
UA4270 covers more than one route in the data window — the stats below are for BUF → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
79%
Median delay
-11 min
90th percentile
+62 min
Cancellation rate
4%
How often is UA4270 on time?
Across 205 flights on BUF → IAD from 2025-07-01 to 2026-06-30, UA4270 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -11 min, and the worst 10% of flights arrived +62 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 | 155 | 79% |
| 16-30 min | 13 | 7% |
| 31-60 min | 7 | 4% |
| 61-120 min | 10 | 5% |
| 2+ hrs | 11 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 58% | +58 min |
| 2025-08 | 17 | 82% | +5 min |
| 2025-10 | 4 | 75% | +55 min |
| 2025-11 | 21 | 90% | -16 min |
| 2025-12 | 14 | 57% | +38 min |
| 2026-01 | 5 | 80% | -5 min |
| 2026-03 | 26 | 77% | +35 min |
| 2026-04 | 29 | 86% | +18 min |
| 2026-05 | 29 | 83% | +4 min |
| 2026-06 | 25 | 92% | -10 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 26 | 92% |
| Tue | 31 | 84% |
| Wed | 29 | 66% |
| Thu | 29 | 76% |
| Fri | 30 | 73% |
| Sat | 25 | 84% |
| Sun | 26 | 81% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…