ACK → BOSNantucket to Boston

live

Direct flights from Nantucket (ACK) to Boston (BOS): 21 nonstop departures observed each week across 3 airlines. 33% of the last 9 operated flights arrived within 15 minutes of schedule. The median arrival is 14 minutes late. 4 of the 9 tracked flights were cancelled. The nonstop covers 146 km, an estimated 41 minutes in the air. Measured by Pro Flight Search from live flight boards at Nantucket and Boston. Updated 12 September 2026 at 11:27 UTC.

ACK Nantucket tracking
BOS Boston smooth · +5
146 km · ~0h 41m est.
dep bank 07:55–20:4521x weekly
Runs rough · 3 airlines · 21x weekly · nonstop
33% on time

of the last 9 operated ACK → BOS flights arrived within 15 minutes

Median arrival delay is +14 min. 4 of 9 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+14 minacross the last 9 operated legs
Flight time~0h 41mestimated from route distance
Weekly departures21x3 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
American AirlinesCape AirJetBlue Airways

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
American AirlinesAA

Flights AA4479 12:31 daily

Cape Air9K33% on time

Flights 9K5001 07:55 daily · 9K5002 07:55 Mo Tu We Th Su · 9K5041 09:05 daily · 9K5042 09:05 Mo Tu We Fr Su

JetBlue AirwaysB6

Flights B61151 varies daily · B61351 19:24 daily

History

operated legs · board outcomes
09-119K5001arrived+7
09-119K5041arrived+14
09-119K5061arrived+3
09-119K5062arrived+55
09-119K5081arrived+23
09-119K5141cancelledCNX
09-119K5142cancelledCNX
09-119K5201cancelledCNX
09-119K5221cancelledCNX

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
ACKNantucket tracking Full ACK delay board →
BOSBoston +5 min smooth 🌤 clear · NNW 4 kt Full BOS delay board →

How the Nantucket to Boston route actually runs

Pro Flight Search records official board updates for nonstop ACK to BOS flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — Nantucket (ACK) to Boston (BOS) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/ACK-BOS
How we measure this →

ACK to BOS questions

Is ACK–BOS running on time right now?

Smooth skies ahead. The arrival side at BOS is the weaker end, route health score 90/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from ACK to BOS?

Great-circle distance is 146 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 40–43 min gate-to-gate on this route.

How often does ACK–BOS fly?

3 carriers operate this route, around 133 flights a week between them. Compare carrier days and times in the airline list above.

What does the route health score measure?

A blend of departure-side delay at ACK and arrival-side delay at BOS, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.