Route · BOS → ACK · 2020–2025 BTS data
Boston to Nantucket
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), BOS to ACK (Boston to Nantucket) ranks #4583 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 80.4%
- On-time
- +1.4 pts
- vs US avg
- 82 min
- Delay when late
- 895
- Flights
- #4583 of 4927
- Corpus placement
Cancelled
2.8%
Best Month
Aug 2021 94%
Worst Month
Jul 2021 65%
Distance
91 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Sep 2025 | 32 | 4 | 0 | 0 | B6 |
| Aug 2025 | 62 | 7 | 0 | 0 | B6 |
| Jul 2025 | 62 | 12 | 0 | 0 | B6 |
| Jun 2025 | 37 | 14 | 1 | 0 | B6 |
| Sep 2024 | 32 | 5 | 0 | 0 | B6 |
| Aug 2024 | 54 | 13 | 1 | 0 | B6 |
| Jul 2024 | 52 | 6 | 0 | 0 | B6 |
| Jun 2024 | 44 | 4 | 1 | 1 | B6 |
| Sep 2023 | 33 | 5 | 2 | 0 | B6 |
| Aug 2023 | 43 | 16 | 0 | 0 | B6 |
| Jul 2023 | 45 | 14 | 7 | 0 | B6 |
| Jun 2023 | 43 | 11 | 2 | 0 | B6 |
| Sep 2022 | 32 | 4 | 0 | 0 | B6 |
| Aug 2022 | 39 | 6 | 2 | 0 | B6 |
| Jul 2022 | 49 | 14 | 0 | 0 | B6 |
| Sep 2021 | 33 | 6 | 0 | 0 | B6 |
| Aug 2021 | 62 | 4 | 2 | 0 | B6 |
| Jul 2021 | 62 | 22 | 4 | 0 | B6 |
| Jun 2021 | 48 | 4 | 3 | 0 | B6 |
| Jul 2020 | 31 | 4 | 0 | 0 | B6 |
Cancellation Rate
2.8%
25 of 895 flights
Diversion Rate
0.1%
1 of 895 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
BOS - Boston
Full on-time, delay-cause, and seasonal performance for Boston, MA.
BOS on-time profileACK - Nantucket
Full on-time, delay-cause, and seasonal performance for Nantucket, MA.
ACK on-time profileCompare the two airports
See BOS and ACK side by side on delays, cancellations, and reliability.
Compare BOS vs ACKOrigin-hub reliability standing
Mid-pack among BOS departures
From BOS, this corridor sits with 49 other 75–85% on-time routes out of 60 tracked departures, not the hub's reliability leaders (6 at ≥85%) and not the softest ( 5 below 75%). Destination: Nantucket · fleet on-time rank #2962 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to BOS–ACK.
Routes with a similar on-time rate
What the Data Says About BOS to ACK
895 tracked flights put the BOS to ACK pairing (Boston to Nantucket) at a 80.4% on-time rate, squarely in line with the wider network. Delays that do occur run 81.5 minutes on average. Across the 91-mile route and its 1 carrier, the trailing 24 months show 2.8% cancelled and 0.1% diverted (895 flights sampled).
The monthly split is wide on this route: Aug 2021 posted the strongest performance at 94% on-time, while Jul 2021 came in at just 65% - a 29-point swing worth factoring into travel timing.
On the multi-year calendar, BOS–ACK peaks in September at 85.2% on-time while August carries the heaviest traffic (~52 flights per month) ; the softest month is July at 76.1%, a 9.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does BOS to ACK rank among US routes by traffic? ▼
How often are flights delayed from BOS to ACK? ▼
What is the cancellation rate for BOS to ACK? ▼
How far is the flight from BOS to ACK? ▼
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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 BOS–ACK data
BOS–ACK is mid-pack at 80.4% on-time; month and carrier mix move more than the corridor headline.
- Compare BOS and ACK airport profiles: delay causes and top routes differ even on the same corridor. BOS airport
- If your dates flex, September (85.2% on-time) beats July (76.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 80.4% 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.