Flight OddsUA4556 IAD → BTV
United Airlines · Washington, DC to Burlington, VT · 32 flights observed, 2026-01-06 to 2026-02-11 · 441 mi
UA4556 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
77%
Median delay
-6 min
90th percentile
+83 min
Cancellation rate
6%
How often is UA4556 on time?
Across 32 flights on IAD → BTV from 2026-01-06 to 2026-02-11, UA4556 arrived within 15 minutes of schedule 77% of the time. The median arrival delay was -6 min, and the worst 10% of flights arrived +83 min or later. 6% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 23 | 77% |
| 16-30 min | 2 | 7% |
| 31-60 min | 1 | 3% |
| 61-120 min | 2 | 7% |
| 2+ hrs | 2 | 7% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-01 | 20 | 65% | +26 min |
| 2026-02 | 10 | 100% | -7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 4 | 75% |
| Tue | 6 | 83% |
| Wed | 6 | 83% |
| Thu | 5 | 40% |
| Fri | 5 | 100% |
| Sat | No data | — |
| Sun | 4 | 75% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…