Flight OddsUA3577 BOS → IAD
United Airlines · Boston, MA to Washington, DC · 3 flights observed, 2025-12-20 to 2026-01-03 · 412 mi
UA3577 covers more than one route in the data window — the stats below are for BOS → IAD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
33%
Median delay
+34 min
90th percentile
+113 min
Cancellation rate
0%
How often is UA3577 on time?
Across 3 flights on BOS → IAD from 2025-12-20 to 2026-01-03, UA3577 arrived within 15 minutes of schedule 33% of the time. The median arrival delay was +34 min, and the worst 10% of flights arrived +113 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 | 1 | 33% |
| 16-30 min | 0 | 0% |
| 31-60 min | 1 | 33% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 1 | 33% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 2 | 0% | +84 min |
| 2026-01 | 1 | 100% | -7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | No data | — |
| Tue | No data | — |
| Wed | No data | — |
| Thu | No data | — |
| Fri | No data | — |
| Sat | 3 | 33% |
| Sun | No data | — |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…