New York (LGA) to Nantucket (ACK): On-Time Performance
Data through July 2026
Delays are only half the story on LGA–ACK: 3.5% of its scheduled flights were outright cancelled, well above the US norm, so a backup plan matters more here than on most routes. When flights do go, 82% land on time, no worse than the national average of 78%.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 12 min
- completed flights
- Cancelled
- 3.5%
- Flights/day
- 1.1
- last 12 months
- Duration
- 1h 19m
- scheduled
- Distance
- 202 mi
Best airline from LGA to ACK
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 83% | 12 min | 3.4% | 238 |
| Republic Airways | 81% | 11 min | 3.5% | 718 |
Monthly on-time trend
Best time to fly from LGA to ACK
Aim for departures around 9 a.m. (88% on-time); avoid 2 p.m. departures (77%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 11 min |
| Tuesdaybest | 84% | 12 min |
| Wednesday | 81% | 13 min |
| Thursday | 84% | 10 min |
| Friday | 83% | 12 min |
| Saturday | 78% | 14 min |
| Sunday | 81% | 10 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft39%
- Airline operations32%
- National airspace system25%
- Weather4%
Frequently asked questions
- How often are flights from LGA to ACK delayed?
- 18% of LGA–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 12 minutes.
- Which airline is most reliable from LGA to ACK?
- JetBlue Airways has the best on-time record on this route at 83%, based on 238 flights. 2 airlines flew LGA–ACK frequently enough to compare in this period.
- What is the best time of day to fly from LGA to ACK?
- Departures around 9 a.m. have the best record (88% on-time), while departures around 2 p.m. have the worst (77%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from LGA to ACK?
- The scheduled LGA–ACK flight time averages 1h 19m over 202 miles. Actual arrival times vary — flights on this route land 15+ minutes late 18% of the time.
- How often are LGA to ACK flights cancelled?
- 3.5% 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 LGA to ACK?
- Tuesday flights have the best record at 84% on-time. Day-of-week differences on this route are modest.
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Based on 956 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.