Flight OddsUA4491 EWR → ACK
United Airlines · Newark, NJ to Nantucket, MA · 40 flights observed, 2026-05-21 to 2026-06-30 · 218 mi
UA4491 covers more than one route in the data window — the stats below are for EWR → ACK, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
92%
Median delay
-25 min
90th percentile
-3 min
Cancellation rate
3%
How often is UA4491 on time?
Across 40 flights on EWR → ACK from 2026-05-21 to 2026-06-30, UA4491 arrived within 15 minutes of schedule 92% of the time. The median arrival delay was -25 min, and the worst 10% of flights arrived -3 min or later. 3% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 35 | 92% |
| 16-30 min | 1 | 3% |
| 31-60 min | 2 | 5% |
| 61-120 min | 0 | 0% |
| 2+ hrs | 0 | 0% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2026-05 | 10 | 90% | -13 min |
| 2026-06 | 28 | 93% | -22 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 6 | 83% |
| Tue | 6 | 100% |
| Wed | 5 | 100% |
| Thu | 5 | 80% |
| Fri | 6 | 100% |
| Sat | 5 | 100% |
| Sun | 5 | 80% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…