Flight OddsUA4239 IAD → BTV
United Airlines · Washington, DC to Burlington, VT · 19 flights observed, 2025-12-18 to 2026-01-05 · 441 mi
UA4239 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
53%
Median delay
+11 min
90th percentile
+163 min
Cancellation rate
0%
How often is UA4239 on time?
Across 19 flights on IAD → BTV from 2025-12-18 to 2026-01-05, UA4239 arrived within 15 minutes of schedule 53% of the time. The median arrival delay was +11 min, and the worst 10% of flights arrived +163 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 10 | 53% |
| 16-30 min | 4 | 21% |
| 31-60 min | 2 | 11% |
| 61-120 min | 1 | 5% |
| 2+ hrs | 2 | 11% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 14 | 43% | +71 min |
| 2026-01 | 5 | 80% | +3 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 3 | 100% |
| Tue | 2 | 0% |
| Wed | 2 | 50% |
| Thu | 3 | 67% |
| Fri | 3 | 33% |
| Sat | 3 | 67% |
| Sun | 3 | 33% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…