Flight OddsUA4238 IAD → BTV
United Airlines · Washington, DC to Burlington, VT · 48 flights observed, 2025-09-25 to 2026-01-04 · 441 mi
UA4238 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
79%
Median delay
-4 min
90th percentile
+34 min
Cancellation rate
0%
How often is UA4238 on time?
Across 48 flights on IAD → BTV from 2025-09-25 to 2026-01-04, UA4238 arrived within 15 minutes of schedule 79% of the time. The median arrival delay was -4 min, and the worst 10% of flights arrived +34 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 | 38 | 79% |
| 16-30 min | 4 | 8% |
| 31-60 min | 4 | 8% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 2 | 4% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-09 | 6 | 83% | -2 min |
| 2025-10 | 24 | 96% | -7 min |
| 2025-12 | 14 | 64% | +104 min |
| 2026-01 | 4 | 25% | +25 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 100% |
| Tue | 6 | 83% |
| Wed | 6 | 100% |
| Thu | 8 | 100% |
| Fri | 8 | 75% |
| Sat | 7 | 57% |
| Sun | 7 | 43% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…