Nantucket (ACK) to Boston (BOS): On-Time Performance
Data through May 2026
Nantucket (ACK) to Boston (BOS) is a thinner route than most in this dataset — 225 departures over the past year, roughly 4 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 72% arrived on time, noticeably below the national average of 78%.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 23 min
- completed flights
- Cancelled
- 2.3%
- Flights/day
- 0.62
- last 12 months
- Duration
- 56m
- scheduled
- Distance
- 91 mi
Monthly on-time trend
Best time to fly from ACK to BOS
Aim for departures around 10 a.m. (85% on-time); avoid 5 p.m. departures (68%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 68% | 31 min |
| Tuesday | 78% | 18 min |
| Wednesday | 72% | 27 min |
| Thursday | 73% | 22 min |
| Friday | 64% | 25 min |
| Saturdaybest | 88% | 8 min |
| Sunday | 66% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations9%
- National airspace system44%
Frequently asked questions
- How often are flights from ACK to BOS delayed?
- 28% of ACK–BOS 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 23 minutes.
- What is the best time of day to fly from ACK to BOS?
- Departures around 10 a.m. have the best record (85% on-time), while departures around 5 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 BOS?
- The scheduled ACK–BOS flight time averages 56m over 91 miles. Actual arrival times vary — flights on this route land 15+ minutes late 28% of the time.
- How often are ACK to BOS flights cancelled?
- 2.3% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What day of the week is most reliable for ACK to BOS?
- Saturday flights have the best record at 88% on-time. Day-of-week differences on this route are meaningful — Friday trails at 64%.
Explore related pages
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Based on 434 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.