JFK to ACK flight delays & on-time performance
Nonstop flights from John F. Kennedy International Airport to Nantucket Memorial Airport · 199 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at JFK or ACK right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from New York (JFK) to Nantucket (ACK) arrived on time 82% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 7% were cancelled, and 7% arrived an hour or more late.
- Republic Airways was the most punctual airline here (86% on time); JetBlue was the least (80%).
- Departures scheduled around 10am did best (97% on time); around 2pm did worst (64%).
- Saturday was the most reliable day to fly (90% on time) and Monday the least (68%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Which airline is most on time from JFK to ACK?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 86% | 5.5% | 11 min | 8.8% | 110 |
| JetBlue | 80% | 7.9% | 13 min | 6.3% | 191 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 9am80%79 flights
- 10am97%34 flights
- 12pm80%25 flights
- 1pm88%115 flights
- 2pm64%47 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday68%10.9% cancelled
- Tuesday86%11.8% cancelled
- Wednesday90%9.1% cancelled
- Thursday84%6.5% cancelled
- Friday84%0.0% cancelled
- Saturday90%6.5% cancelled
- Sunday74%6.5% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)29%
- Air traffic control & airport congestion17%
- Extreme weather2%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Airline (crew, maintenance, cleaning, fueling)48%
- Air traffic control & airport congestion38%
- Extreme weather14%
- Security0%
JFK to ACK: common questions
- How often are JFK to ACK flights on time?
- 82% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from New York to Nantucket cancelled?
- 7.0% of scheduled flights were cancelled (21 of 301).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 64 min behind schedule on average, and 7.2% of flights were an hour or more late.
- How long is taxi time at JFK?
- Flights on this route spent 23 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ACK to JFK — 72% on time
More flights from New York
More flights to Nantucket
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: JFK → ACK, nonstop flights by US airlines that report to the DOT. How we calculate this.