Best Time to Fly ACK to HPN: On-Time Stats by Hour & Airline
Nantucket Memorial → Westchester County
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 78.0% of Nantucket (ACK) to White Plains (HPN) flights arrived on time (234 scheduled flights). That is in line with the national average of 77.6%.
JetBlue was the only reporting airline with regular flights on this route.
Over 24 months, Saturday was the most reliable day (89% on time) and July the worst month (67%).
The cancellation rate was 4.7% (US average 1.8%).
ACK to HPN on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue | 78.0% | 107 min | 4.7% | 234 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ACK to HPN
On-time arrival % by scheduled departure hour (local time), 460 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 12pm–1pm | Limited data | 1 | |
| 1pm–2pm | 78.7% | 3.9% | 78 |
| 2pm–3pm | 80.8% | 2.6% | 156 |
| 5pm–6pm | 72.3% | 13.0% | 54 |
| 6pm–7pm | 76.7% | 4.7% | 171 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ACK to HPN
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 71.8% | -13.0 pts | 7.3% | 246 |
| All other days | 84.8% | — | 1.9% | 214 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).