Nantucket (ACK) to New York (LGA): On-Time Performance
Data through May 2026
The biggest risk when flying ACK to LGA isn't a late arrival — it's not departing at all. 5.5% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 79% land on time, no worse than the national average of 78%.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 5.5%
- Flights/day
- 1.1
- last 12 months
- Duration
- 1h 19m
- scheduled
- Distance
- 202 mi
Best airline from ACK to LGA
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 84% | 15 min | 2.9% | 239 |
| Republic Airways | 76% | 22 min | 6.5% | 601 |
Monthly on-time trend
Best time to fly from ACK to LGA
Aim for departures around 11 a.m. (86% on-time); avoid 2 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 15 min |
| Tuesdaybest | 83% | 18 min |
| Wednesday | 73% | 20 min |
| Thursdaybest | 83% | 24 min |
| Friday | 80% | 16 min |
| Saturday | 82% | 14 min |
| Sunday | 70% | 33 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 operations30%
- National airspace system35%
- Weather1%
Frequently asked questions
- How often are flights from ACK to LGA delayed?
- 22% of ACK–LGA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 20 minutes.
- Which airline is most reliable from ACK to LGA?
- JetBlue Airways has the best on-time record on this route at 84%, based on 239 flights. 2 airlines flew ACK–LGA frequently enough to compare in this period.
- What is the best time of day to fly from ACK to LGA?
- Departures around 11 a.m. have the best record (86% on-time), while departures around 2 p.m. have the worst (68%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ACK to LGA?
- The scheduled ACK–LGA flight time averages 1h 19m over 202 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are ACK to LGA flights cancelled?
- 5.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for ACK to LGA?
- Tuesday flights have the best record at 83% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 70%.
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Based on 840 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.