Washington (DCA) to Nantucket (ACK): On-Time Performance
Data through May 2026
Washington (DCA) to Nantucket (ACK) is a thinner route than most in this dataset — 282 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 81% arrived on time.
- On-time
- 81%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 2.8%
- Flights/day
- 0.77
- last 12 months
- Duration
- 1h 35m
- scheduled
- Distance
- 405 mi
Best airline from DCA to ACK
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 81% | 10 min | 3.2% | 252 |
| Republic Airways | 81% | 10 min | 2.5% | 314 |
Monthly on-time trend
Best time to fly from DCA to ACK
Aim for departures around 10 a.m. (87% on-time); avoid 3 p.m. departures (75%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 84% | 7 min |
| Tuesday | 83% | 9 min |
| Wednesdaybest | 89% | 5 min |
| Thursday | 79% | 14 min |
| Friday | 76% | 11 min |
| Saturday | 83% | 7 min |
| Sunday | 74% | 15 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations25%
- National airspace system27%
- Weather4%
Frequently asked questions
- How often are flights from DCA to ACK delayed?
- 19% of DCA–ACK flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 10 minutes.
- Which airline is most reliable from DCA to ACK?
- JetBlue Airways has the best on-time record on this route at 81%, based on 252 flights. 2 airlines flew DCA–ACK frequently enough to compare in this period.
- What is the best time of day to fly from DCA to ACK?
- Departures around 10 a.m. have the best record (87% on-time), while departures around 3 p.m. have the worst (75%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from DCA to ACK?
- The scheduled DCA–ACK flight time averages 1h 35m over 405 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are DCA to ACK flights cancelled?
- 2.8% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What day of the week is most reliable for DCA to ACK?
- Wednesday flights have the best record at 89% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 74%.
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Based on 566 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.