Nantucket (ACK) to New York (LGA): On-Time Performance
Data through July 2026
The biggest risk when flying ACK to LGA isn't a late arrival — it's not departing at all. 6.4% of scheduled flights on this route were cancelled, several times the typical US rate. When flights do go, 77% land on time, below the national average of 78%.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 22 min
- completed flights
- Cancelled
- 6.4%
- 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 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 82% | 17 min | 3.4% | 238 |
| Republic Airways | 75% | 24 min | 7.4% | 718 |
Monthly on-time trend
Best time to fly from ACK to LGA
Aim for departures around 11 a.m. (84% on-time); avoid 4 p.m. departures (72%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 28 min |
| Tuesdaybest | 82% | 20 min |
| Wednesday | 71% | 23 min |
| Thursday | 81% | 23 min |
| Friday | 80% | 14 min |
| Saturday | 79% | 21 min |
| Sunday | 69% | 26 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft30%
- Airline operations25%
- National airspace system43%
- Weather2%
Frequently asked questions
- How often are flights from ACK to LGA delayed?
- 23% of ACK–LGA 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 22 minutes.
- Which airline is most reliable from ACK to LGA?
- JetBlue Airways has the best on-time record on this route at 82%, based on 238 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 (84% on-time), while departures around 4 p.m. have the worst (72%). 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 23% of the time.
- How often are ACK to LGA flights cancelled?
- 6.4% 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 ACK to LGA?
- Tuesday flights have the best record at 82% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 69%.
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Based on 956 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.