Flight OddsUA4335 IAD → BUF
United Airlines · Washington, DC to Buffalo, NY · 284 flights observed, 2025-07-01 to 2026-06-30 · 283 mi
UA4335 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
83%
Median delay
-8 min
90th percentile
+29 min
Cancellation rate
2%
How often is UA4335 on time?
Across 284 flights on IAD → BUF from 2025-07-01 to 2026-06-30, UA4335 arrived within 15 minutes of schedule 83% of the time. The median arrival delay was -8 min, and the worst 10% of flights arrived +29 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 | 232 | 83% |
| 16-30 min | 19 | 7% |
| 31-60 min | 10 | 4% |
| 61-120 min | 6 | 2% |
| 2+ hrs | 12 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 31 | 90% | +6 min |
| 2025-08 | 26 | 73% | +3 min |
| 2025-09 | 20 | 95% | -3 min |
| 2025-10 | 27 | 89% | -7 min |
| 2025-11 | 29 | 79% | -1 min |
| 2025-12 | 13 | 77% | +33 min |
| 2026-01 | 29 | 66% | +14 min |
| 2026-02 | 11 | 91% | +17 min |
| 2026-03 | 23 | 78% | +10 min |
| 2026-04 | 26 | 88% | +1 min |
| 2026-05 | 25 | 100% | -8 min |
| 2026-06 | 19 | 74% | +16 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 45 | 80% |
| Tue | 43 | 79% |
| Wed | 45 | 89% |
| Thu | 47 | 87% |
| Fri | 36 | 81% |
| Sat | 26 | 81% |
| Sun | 37 | 84% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…