Route · ACK → BOS · 2020–2025 BTS data
Nantucket to Boston
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ACK to BOS (Nantucket to Boston) ranks #4584 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 75.7%
- On-time
- -3.3 pts
- vs US avg
- 83 min
- Delay when late
- 894
- Flights
- #4584 of 4927
- Corpus placement
Cancelled
3.4%
Best Month
Aug 2021 87%
Worst Month
Jul 2025 65%
Distance
91 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2025 | 32 | 20 | 0 | 0 | B6 |
| Aug 2025 | 62 | 9 | 0 | 0 | B6 |
| Jul 2025 | 62 | 22 | 1 | 0 | B6 |
| Jun 2025 | 37 | 7 | 3 | 0 | B6 |
| Sep 2024 | 32 | 11 | 0 | 0 | B6 |
| Aug 2024 | 54 | 13 | 3 | 0 | B6 |
| Jul 2024 | 52 | 8 | 2 | 0 | B6 |
| Jun 2024 | 44 | 10 | 1 | 0 | B6 |
| Sep 2023 | 33 | 8 | 2 | 0 | B6 |
| Aug 2023 | 43 | 14 | 0 | 0 | B6 |
| Jul 2023 | 45 | 20 | 4 | 0 | B6 |
| Jun 2023 | 43 | 9 | 3 | 0 | B6 |
| Sep 2022 | 32 | 3 | 0 | 0 | B6 |
| Aug 2022 | 39 | 9 | 0 | 0 | B6 |
| Jul 2022 | 48 | 10 | 0 | 0 | B6 |
| Sep 2021 | 33 | 8 | 0 | 0 | B6 |
| Aug 2021 | 62 | 8 | 2 | 0 | B6 |
| Jul 2021 | 62 | 21 | 5 | 0 | B6 |
| Jun 2021 | 48 | 4 | 4 | 0 | B6 |
| Jul 2020 | 31 | 3 | 0 | 0 | B6 |
Cancellation Rate
3.4%
30 of 894 flights
Diversion Rate
0.0%
0 of 894 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ACK - Nantucket
Full on-time, delay-cause, and seasonal performance for Nantucket, MA.
ACK on-time profileBOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
BOS on-time profileCompare the two airports
See ACK and BOS side by side on delays, cancellations, and reliability.
Compare ACK vs BOSOrigin-hub reliability standing
Mid-pack among ACK departures
From ACK, this corridor sits with 5 other 75–85% on-time routes out of 5 tracked departures, not the hub's reliability leaders (0 at ≥85%) and not the softest ( 0 below 75%). Destination: Boston · fleet on-time rank #4352 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to ACK–BOS.
Routes with a similar on-time rate
What the Data Says About ACK to BOS
The Nantucket to Boston corridor (ACK to BOS) posts a 75.7% on-time rate on the lower edge of the average band, based on 894 tracked flights. Late flights run 82.5 minutes behind on average. 1 carrier cover the 91-mile route; over the last 24 months, 30 of 894 flights were cancelled (3.4%) and 0.0% diverted.
The monthly split is wide on this route: Aug 2021 posted the strongest performance at 87% on-time, while Jul 2025 came in at just 65% - a 23-point swing worth factoring into travel timing.
On the multi-year calendar, ACK–BOS peaks in June at 82.6% on-time while August carries the heaviest traffic (~52 flights per month) ; the softest month is September at 69.1%, a 13.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ACK to BOS rank among US routes by traffic? ▼
How often are flights delayed from ACK to BOS? ▼
What is the cancellation rate for ACK to BOS? ▼
How far is the flight from ACK to BOS? ▼
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Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using ACK–BOS data
ACK–BOS is mid-pack at 75.7% on-time; month and carrier mix move more than the corridor headline.
- Compare ACK and BOS airport profiles: delay causes and top routes differ even on the same corridor. ACK airport
- If your dates flex, June (82.6% on-time) beats September (69.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 75.7% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.