Boston (BOS) to Nantucket (ACK): On-Time Performance
Data through July 2026
Boston (BOS) to Nantucket (ACK) is a thinner route than most in this dataset — 284 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 81% arrived on time.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.6%
- Flights/day
- 0.78
- last 12 months
- Duration
- 54m
- scheduled
- Distance
- 91 mi
Monthly on-time trend
Best time to fly from BOS to ACK
Departure time makes little difference on this route — on-time rates stay within a few points across the day.
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 73% | 20 min |
| Tuesday | 82% | 26 min |
| Wednesday | 86% | 14 min |
| Thursday | 74% | 21 min |
| Friday | 86% | 12 min |
| Saturdaybest | 91% | 6 min |
| Sunday | 79% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations23%
- National airspace system19%
- Weather20%
Frequently asked questions
- How often are flights from BOS to ACK delayed?
- 19% of BOS–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 16 minutes.
- What is the best time of day to fly from BOS to ACK?
- Departures around 10 a.m. have the best record (82% on-time), while departures around 9 a.m. have the worst (81%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BOS to ACK?
- The scheduled BOS–ACK flight time averages 54m over 91 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are BOS to ACK flights cancelled?
- 1.6% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What day of the week is most reliable for BOS to ACK?
- Saturday flights have the best record at 91% on-time. Day-of-week differences on this route are meaningful — Monday trails at 73%.
Explore related pages
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Other ways to fly to Nantucket (ACK)
Related guides
Based on 548 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.