Flight OddsUA577 EWR → BOS
United Airlines · Newark, NJ to Boston, MA · 183 flights observed, 2025-07-01 to 2026-05-20 · 200 mi
UA577 covers more than one route in the data window — the stats below are for EWR → BOS, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
75%
Median delay
-7 min
90th percentile
+69 min
Cancellation rate
4%
How often is UA577 on time?
Across 183 flights on EWR → BOS from 2025-07-01 to 2026-05-20, UA577 arrived within 15 minutes of schedule 75% of the time. The median arrival delay was -7 min, and the worst 10% of flights arrived +69 min or later. 4% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 132 | 75% |
| 16-30 min | 10 | 6% |
| 31-60 min | 10 | 6% |
| 61-120 min | 19 | 11% |
| 2+ hrs | 4 | 2% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 22 | 59% | +39 min |
| 2025-10 | 5 | 20% | +48 min |
| 2025-11 | 22 | 77% | +7 min |
| 2025-12 | 13 | 69% | +17 min |
| 2026-01 | 26 | 81% | +0 min |
| 2026-02 | 23 | 91% | +8 min |
| 2026-03 | 22 | 68% | +15 min |
| 2026-04 | 22 | 77% | +10 min |
| 2026-05 | 20 | 90% | -7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 27 | 63% |
| Tue | 30 | 87% |
| Wed | 31 | 74% |
| Thu | 29 | 72% |
| Fri | 30 | 77% |
| Sat | 11 | 82% |
| Sun | 17 | 76% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…