BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
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ACK→JFK

Nantucket, MA (ACK) to New York, NY (JFK) flight delay odds

65.9% of 308 official scheduled ACK-to-JFK flights arrived on time; 22.1% arrived at least 30 minutes late and 4.5% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALHigher disruption
65.9%arrived on time
22.1%30+ min late
4.5%cancelled
308scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late16.9%all scheduled flights
120+ minutes late6.8%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+23.1 mincompleted flights

Which departure time was most reliable for ACK to JFK?

Only Afternoon met the ACK-to-JFK departure window threshold: 65.9% of 308 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Afternoon30865.9%22.1%4.5%

Which weekday was most reliable for ACK to JFK?

Among qualifying ACK-to-JFK weekday results, Friday had the highest on-time rate: 80.9% of 47 flights. Thursday was lowest at 50.0% across 46 flights.

DayFlightsOn time30+ minCancelled
Monday4656.5%23.9%6.5%
Tuesday4072.5%25.0%2.5%
Wednesday3770.3%10.8%10.8%
Thursday4650.0%32.6%8.7%
Friday4780.9%8.5%2.1%
Saturday4678.3%15.2%0.0%
Sunday4654.3%37.0%2.2%

Which airline was most reliable for ACK to JFK?

Among qualifying ACK-to-JFK airline results, JetBlue Airways had the highest on-time rate: 68.7% of 198 flights. Republic Airways was lowest at 60.9% across 110 flights.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways19868.7%20.7%4.0%
Republic Airways11060.9%24.5%5.5%

Which month was most reliable for ACK to JFK?

Among qualifying ACK-to-JFK month results, August 2025 had the highest on-time rate: 77.6% of 85 flights. July 2025 was lowest at 51.6% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20259351.6%30.1%9.7%
August 20258577.6%12.9%1.2%
September 20253976.9%17.9%0.0%
June 20266563.1%26.2%6.2%

What drove ACK to JFK delay minutes?

National airspace was the largest recorded ACK-to-JFK delay category, accounting for 50.5% of 9,192 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.9%
Late aircraft20.1%
National airspace50.5%
Weather2.5%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.