Best Time to Fly ACK to BOS: On-Time Stats by Hour & Airline
Nantucket Memorial → Logan International
Data through July 2026 · Last updated October 18, 2026
284 flights were scheduled from Nantucket (ACK) to Boston (BOS) in the last 12 months, and 71.6% of those that flew arrived on time, 6.0 points below the US average of 77.6%.
Republic Airways was the most punctual of the 2 airlines on the route at 88.6%, while JetBlue trailed at 68.4%.
June has been the best month (81% on time) and Monday the weakest day of the week (64%).
3.2% of flights were cancelled, versus 1.8% nationally.
ACK to BOS on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airways | 88.6% | 84 min | 0.0% | 44 |
| JetBlue | 68.4% | 76 min | 3.8% | 240 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ACK to BOS
On-time arrival % by scheduled departure hour (local time), 496 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | 89.2% | 0.0% | 65 |
| 11am–12pm | 80.4% | 1.9% | 52 |
| 12pm–1pm | Limited data | 26 | |
| 1pm–2pm | Limited data | 2 | |
| 2pm–3pm | 65.8% | 0.0% | 38 |
| 3pm–4pm | 67.7% | 4.5% | 133 |
| 4pm–5pm | Limited data | 5 | |
| 5pm–6pm | 67.0% | 2.5% | 121 |
| 6pm–7pm | 61.2% | 9.3% | 54 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ACK to BOS
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 72.1% | +1.8 pts | 5.0% | 279 |
| All other days | 70.2% | — | 0.9% | 217 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).