Nantucket Memorial Airport (ACK): Delays & On-Time Performance
Data through May 2026
Nantucket Memorial Airport (ACK) in Nantucket, MA is a middle-of-the-pack performer: 79% of departures are on time, within a few points of the national 78%. It hosts 4 airlines flying 4 departures a day to 8 destinations, with cancellations at 5%.
- Departures on-time
- 79%
- left <15 min late
- Avg dep delay
- 20 min
- Arrivals on-time
- 82%
- Cancelled
- 5.0%
- Destinations
- 8
- nonstop
- Airlines
- 4
Monthly on-time trend
Best time of day to depart from ACK
Busiest routes from ACK
| Route | Flights/12mo | On-time | Avg delay |
|---|---|---|---|
| ACK → LGA | 409 | 79% | 20 min |
| ACK → JFK | 311 | 71% | 30 min |
| ACK → DCA | 282 | 75% | 16 min |
| ACK → HPN | 236 | 82% | 19 min |
| ACK → BOS | 225 | 72% | 23 min |
Airline performance at ACK
| Airline | On-time departures | Avg delay | Flights |
|---|---|---|---|
| JetBlue Airways | 80% | 20 min | 1,818 |
| Republic Airways | 78% | 20 min | 1,298 |
Frequently asked questions
- How often are flights delayed at ACK?
- 21% of departures from Nantucket Memorial Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 20 minutes. The national on-time average over the same period was 78%.
- What is the best time of day to depart from ACK?
- Flights scheduled around 10 a.m. depart on time 86% of the time at ACK, versus 71% around 4 p.m.. Booking before noon is the usual rule of thumb here.
- How often are flights cancelled at ACK?
- 5% of scheduled departures from ACK were cancelled in this period, compared with a national rate of 1.6%.
Popular route pages from this airport
Based on 3,189 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.