New York (JFK) to Nantucket (ACK): On-Time Performance
Data through July 2026
New York (JFK) to Nantucket (ACK) is a thinner route than most in this dataset — 301 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 81% arrived on time. Cancellations are the bigger caveat: 6% of scheduled flights never departed.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 6.0%
- Flights/day
- 0.82
- last 12 months
- Duration
- 1h 23m
- scheduled
- Distance
- 199 mi
Best airline from JFK to ACK
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 85% | 11 min | 4.9% | 245 |
| JetBlue Airways | 79% | 18 min | 6.5% | 474 |
Monthly on-time trend
Best time to fly from JFK to ACK
Aim for departures around 10 a.m. (92% on-time); avoid 2 p.m. departures (73%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 77% | 22 min |
| Tuesday | 82% | 14 min |
| Wednesdaybest | 87% | 12 min |
| Thursday | 82% | 11 min |
| Friday | 83% | 16 min |
| Saturday | 83% | 17 min |
| Sunday | 75% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft34%
- Airline operations46%
- National airspace system15%
- Weather5%
Frequently asked questions
- How often are flights from JFK to ACK delayed?
- 19% of JFK–ACK flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from JFK to ACK?
- Republic Airways has the best on-time record on this route at 85%, based on 245 flights. 2 airlines flew JFK–ACK frequently enough to compare in this period.
- What is the best time of day to fly from JFK to ACK?
- Departures around 10 a.m. have the best record (92% on-time), while departures around 2 p.m. have the worst (73%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from JFK to ACK?
- The scheduled JFK–ACK flight time averages 1h 23m over 199 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are JFK to ACK flights cancelled?
- 6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for JFK to ACK?
- Wednesday flights have the best record at 87% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 75%.
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Based on 719 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.