Flight OddsUA399 BOS → EWR
United Airlines · Boston, MA to Newark, NJ · 13 flights observed, 2025-08-19 to 2025-09-01 · 200 mi
UA399 covers more than one route in the data window — the stats below are for BOS → EWR, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
62%
Median delay
+7 min
90th percentile
+71 min
Cancellation rate
0%
How often is UA399 on time?
Across 13 flights on BOS → EWR from 2025-08-19 to 2025-09-01, UA399 arrived within 15 minutes of schedule 62% of the time. The median arrival delay was +7 min, and the worst 10% of flights arrived +71 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 | 8 | 62% |
| 16-30 min | 1 | 8% |
| 31-60 min | 1 | 8% |
| 61-120 min | 2 | 15% |
| 2+ hrs | 1 | 8% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-08 | 12 | 58% | +25 min |
| 2025-09 | 1 | 100% | +7 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 100% |
| Tue | 2 | 50% |
| Wed | 2 | 100% |
| Thu | 2 | 0% |
| Fri | 2 | 50% |
| Sat | 2 | 100% |
| Sun | 1 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…