Routes › Nantucket (ACK) › ACK to BOS
Route · 12 months to July 2026
Nantucket to Boston: on-time record
Nantucket Memorial to Logan International
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report. Data through July 2026; this is a monthly history, not live flight status.
69.4% of scheduled ACK to BOS flights arrived on time in the 12 months to July 2026. The figure covers 284 flights between Nantucket and Boston by carriers that report to BTS, a distance of 91 miles.
That is 6.6 points below the national on-time share of 76.0% for the same period and level with the 69.6% recorded for all departures from ACK. Flights that did arrive were 10.9 min late on average, and 3.2% of scheduled flights were cancelled (national: 1.8%).
JetBlue Airways operates most of the reported flights on the route, with 240 flights in the period.
By scheduled departure hour (local time at ACK), flights leaving from 10 am to 11 am had the highest on-time share, 93.2%; those leaving from 6 pm to 7 pm had the lowest, 55.6%.
The on-time share is up 1.0 points on the previous 12 months (68.4%); cancellations moved from 3.3% to 3.2%.
Of the delay minutes that carriers assigned to a BTS cause category on this route, national aviation system 51%, late-arriving aircraft 42% and air carrier 7%.
- On time 69.4%
- Arrived 15+ minutes late 27.5%
- Cancelled 3.2%
- Diverted 0.0%
Airlines on the route compared
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| B6 JetBlue Airways | 240 | 85% | 65.8% | 15.5 min | 3.8% |
| YX Republic Airline | 44 | 15% | 88.6% | -12.9 min | 0.0% |
Carriers with at least 24 flights in the 12 months to July 2026. The on-time pill is green when a carrier is at or above the route's overall share. Regional carriers operate flights sold under larger airlines' brands; BTS lists the carrier that operated the flight.
Compared with the airports and the nation
| Measure | ACK to BOS | All departures from ACK | All arrivals at BOS | All reported flights |
|---|---|---|---|---|
| Arrived on time | 69.4% | 69.6% | 71.2% | 76.0% |
| Arrived 15+ minutes late | 27.5% | 24.9% | 25.9% | 21.9% |
| Cancelled | 3.2% | 5.3% | 2.8% | 1.8% |
| Diverted | 0.0% | 0.2% | 0.1% | 0.3% |
| Average arrival delay | 10.9 min | 14.0 min | 11.5 min | 8.1 min |
| Delay minutes per 100 flights | 2,175 | 2,198 | 2,030 | 1,684 |
| Scheduled flights | 284 | 1,690 | 143,441 | 7,043,858 |
12 months to July 2026. Delay minutes count late arrivals only (an early arrival is zero), so the per-100-flights row is a normalised total rather than an average of early and late.
The return direction, BOS to ACK, recorded 81.0% on time across 284 flights in the same period.
Month by month
Year on year: on time 69.4% against 68.4% (+1.0 pts), cancelled 3.2% against 3.3%, flights 284 against 212.
By scheduled departure hour
Delay causes
Seasonality
| Calendar month | Flights | On time | Cancelled | Avg arrival delay | Years in sample |
|---|---|---|---|---|---|
| May | 47 | 78.7% | 2.1% | 6.5 min | 3 |
| Jun | 146 | 77.4% | 2.7% | 6.8 min | 3 |
| Jul | 207 | 66.7% | 5.8% | 12.3 min | 3 |
| Aug | 159 | 75.5% | 1.9% | 8.0 min | 3 |
| Sep | 97 | 57.7% | 2.1% | 17.0 min | 3 |
| Oct | 39 | 64.1% | 0.0% | 56.8 min | 3 |
Each calendar month summed across the 36 months on file, so most rows combine three years. The pill compares the month with the route's own 12-month share.
Other routes from Nantucket (ACK)
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| ACK–LGA | Nantucket to New York | 412 | 71.8% | 13.7 min | 5.8% |
| ACK–JFK | Nantucket to New York | 301 | 65.8% | 12.0 min | 9.0% |
| ACK–DCA | Nantucket to Washington | 283 | 68.6% | 14.6 min | 4.2% |
| ACK–HPN | Nantucket to White Plains | 234 | 74.4% | 14.0 min | 4.7% |
| ACK–PHL | Nantucket to Philadelphia | 122 | 68.9% | 12.4 min | 4.1% |
| ACK–ORD | Nantucket to Chicago | 31 | 61.3% | 23.7 min | 6.5% |
| ACK–CLT | Nantucket to Charlotte | 23 | 65.2% | 68.0 min | 0.0% |
All 8 routes and the airport record for ACK · airport record for BOS
Questions and answers
How often are flights from Nantucket to Boston on time?
69.4% of the 284 flights scheduled from ACK to BOS in the 12 months to July 2026 arrived less than 15 minutes after their scheduled time. The national share for the same period was 76.0%. Cancelled and diverted flights count as not on time.
Which airline has the highest on-time share from ACK to BOS?
JetBlue Airways is the only reporting carrier with at least 60 flights on the route in the period, so there is no comparison to make.
What causes delays between Nantucket and Boston?
For flights that arrived 15 or more minutes late, carriers attributed the delay minutes as follows: national aviation system 51%, late-arriving aircraft 42%, air carrier 7%, security 0%, extreme weather 0%. The categories are the carriers' own reports to BTS; weather that slows the wider system is usually recorded under the National Aviation System rather than extreme weather.
What time of day has the highest on-time share from ACK?
Flights scheduled to leave ACK from 10 am to 11 am arrived on time 93.2% of the time, the highest of any hour with enough flights to compare. The lowest was 6 pm to 7 pm at 55.6%. Delays tend to build through the day as late aircraft carry over to later flights.
Is it getting better?
The on-time share for the 12 months to July 2026 was 69.4%, up 1.0 points on the previous 12 months (68.4%). The monthly chart on this page shows each of the last 36 months.
Where does this data come from?
Every figure is computed from the Bureau of Transportation Statistics Reporting Carrier On-Time Performance files, which list each scheduled domestic flight by the carriers required to report. This page covers August 2023 to July 2026. It shows totals and averages only; it is not a live flight-status service.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance (1987 to present), monthly files August 2023 to July 2026, a US government work in the public domain. Figures are totals and averages over all scheduled flights by reporting carriers on the route; no individual flight or aircraft is identified. Times are local to the departure airport. The load factor and passenger counts from the BTS T-100 series are not included in this edition. See the methodology; report processing errors through corrections.