Flight OddsUA4523 IAD → BUF
United Airlines · Washington, DC to Buffalo, NY · 25 flights observed, 2026-03-29 to 2026-04-28 · 283 mi
UA4523 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
75%
Median delay
0 min
90th percentile
+110 min
Cancellation rate
4%
How often is UA4523 on time?
Across 25 flights on IAD → BUF from 2026-03-29 to 2026-04-28, UA4523 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was 0 min, and the worst 10% of flights arrived +110 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 | 18 | 75% |
| 16-30 min | 1 | 4% |
| 31-60 min | 1 | 4% |
| 61-120 min | 1 | 4% |
| 2+ hrs | 3 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-03 | 1 | 100% | -19 min |
| 2026-04 | 23 | 74% | +20 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | 4 | 75% |
| Wed | 4 | 25% |
| Thu | 3 | 100% |
| Fri | 4 | 75% |
| Sat | 4 | 100% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…