Flight OddsUA4535 IAD → BTV
United Airlines · Washington, DC to Burlington, VT · 53 flights observed, 2025-10-26 to 2025-12-17 · 441 mi
UA4535 covers more than one route in the data window — the stats below are for IAD → BTV, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
58%
Median delay
+7 min
90th percentile
+88 min
Cancellation rate
2%
How often is UA4535 on time?
Across 53 flights on IAD → BTV from 2025-10-26 to 2025-12-17, UA4535 arrived within 15 minutes of schedule 58% of the time. The median arrival delay was +7 min, and the worst 10% of flights arrived +88 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 | 30 | 58% |
| 16-30 min | 6 | 12% |
| 31-60 min | 6 | 12% |
| 61-120 min | 7 | 13% |
| 2+ hrs | 3 | 6% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-10 | 6 | 33% | +39 min |
| 2025-11 | 29 | 69% | +35 min |
| 2025-12 | 17 | 47% | +40 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 8 | 63% |
| Tue | 8 | 50% |
| Wed | 8 | 63% |
| Thu | 7 | 57% |
| Fri | 7 | 29% |
| Sat | 7 | 57% |
| Sun | 7 | 86% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…