ACK to BOS flight delays & on-time performance
Nonstop flights from Nantucket Memorial Airport to Boston Logan International Airport · 91 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at ACK or BOS right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Nantucket (ACK) to Boston (BOS) arrived on time 72% of the time in Aug 2025 – Jul 2026, worse than the 78% national average.
- 3.2% were cancelled, and 14% arrived an hour or more late.
- Republic Airways was the most punctual airline here (89% on time); JetBlue was the least (68%).
- Departures scheduled around 10am did best (93% on time); around 5pm did worst (59%).
- Saturday was the most reliable day to fly (81% on time) and Tuesday the least (65%).
- The largest source of delay minutes was air traffic control & airport congestion (51%).
Which airline is most on time from ACK to BOS?
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 |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 89% | 0.0% | 10 min | 4.5% | 44 |
| JetBlue | 68% | 3.8% | 25 min | 15.6% | 240 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 10am93%44 flights
- 11am84%46 flights
- 3pm72%61 flights
- 5pm59%71 flights
- 6pm61%54 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday65%2.4% cancelled
- Tuesday65%7.5% cancelled
- Wednesday72%0.0% cancelled
- Thursday72%0.0% cancelled
- Friday79%0.0% cancelled
- Saturday81%7.5% cancelled
- Sunday67%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.
- Air traffic control & airport congestion51%
- Late-arriving aircraft42%
- Airline (crew, maintenance, cleaning, fueling)7%
- Security0%
- Extreme weather0%
Why flights are cancelled
Share of cancellations by reason.
- Air traffic control & airport congestion67%
- Extreme weather22%
- Airline (crew, maintenance, cleaning, fueling)11%
- Security0%
ACK to BOS: common questions
- How often are ACK to BOS flights on time?
- 72% 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 Nantucket to Boston cancelled?
- 3.2% of scheduled flights were cancelled (9 of 284).
- How long are typical delays?
- Across all flights the average arrival delay was 22 min (early arrivals count as zero). Flights that were late arrived 76 min behind schedule on average, and 13.8% of flights were an hour or more late.
- How long is taxi time at ACK?
- Flights on this route spent 17 min taxiing from the gate to takeoff on average.
Related routes
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: ACK → BOS, nonstop flights by US airlines that report to the DOT. How we calculate this.