BOS to ACK flight delays & on-time performance
Nonstop flights from Boston Logan International Airport to Nantucket Memorial Airport · 91 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at BOS or ACK right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Boston (BOS) to Nantucket (ACK) arrived on time 83% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.5% were cancelled, and 7% arrived an hour or more late.
- JetBlue was the most punctual airline here (84% on time); Republic Airways was the least (80%).
- Departures scheduled around 8am did best (100% on time); around 12pm did worst (80%).
- Friday was the most reliable day to fly (93% on time) and Thursday the least (70%).
- The largest source of delay minutes was late-arriving aircraft (52%).
Which airline is most on time from BOS to ACK?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| JetBlue | 84% | 2.9% | 12 min | 7.3% | 240 |
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 80% | 0.0% | 7 min | 4.5% | 44 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 8am100%15 flights
- 9am83%113 flights
- 11am95%20 flights
- 12pm80%131 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday75%2.4% cancelled
- Tuesday81%7.7% cancelled
- Wednesday89%0.0% cancelled
- Thursday70%0.0% cancelled
- Friday93%0.0% cancelled
- Saturday92%2.5% cancelled
- Sunday82%4.9% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft52%
- Airline (crew, maintenance, cleaning, fueling)20%
- Air traffic control & airport congestion17%
- Extreme weather11%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather43%
- Air traffic control & airport congestion43%
- Airline (crew, maintenance, cleaning, fueling)14%
- Security0%
BOS to ACK: common questions
- How often are BOS to ACK flights on time?
- 83% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Boston to Nantucket cancelled?
- 2.5% of scheduled flights were cancelled (7 of 284).
- How long are typical delays?
- Across all flights the average arrival delay was 11 min (early arrivals count as zero). Flights that were late arrived 62 min behind schedule on average, and 6.9% of flights were an hour or more late.
- How long is taxi time at BOS?
- Flights on this route spent 18 min taxiing from the gate to takeoff on average.
Related routes
Return trip: ACK to BOS — 72% on time
More flights from Boston
More flights to Nantucket
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: BOS → ACK, nonstop flights by US airlines that report to the DOT. How we calculate this.