Flight OddsUA4397 ACK → EWR
United Airlines · Nantucket, MA to Newark, NJ · 49 flights observed, 2025-07-01 to 2025-08-18 · 218 mi
UA4397 covers more than one route in the data window — the stats below are for ACK → EWR, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
42%
Median delay
+51 min
90th percentile
+228 min
Cancellation rate
12%
How often is UA4397 on time?
Across 49 flights on ACK → EWR from 2025-07-01 to 2025-08-18, UA4397 arrived within 15 minutes of schedule 42% of the time. The median arrival delay was +51 min, and the worst 10% of flights arrived +228 min or later. 12% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 18 | 42% |
| 16-30 min | 3 | 7% |
| 31-60 min | 2 | 5% |
| 61-120 min | 6 | 14% |
| 2+ hrs | 14 | 33% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-07 | 26 | 38% | +75 min |
| 2025-08 | 17 | 47% | +68 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 50% |
| Tue | 6 | 50% |
| Wed | 6 | 50% |
| Thu | 5 | 40% |
| Fri | 7 | 43% |
| Sat | 7 | 29% |
| Sun | 6 | 33% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…