Washington (DCA) to Nantucket (ACK): On-Time Performance
Data through July 2026
Washington (DCA) to Nantucket (ACK) is a thinner route than most in this dataset — 283 departures over the past year, roughly 5 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 77% arrived on time. Cancellations are the bigger caveat: 4.3% of scheduled flights never departed.
- On-time
- 77%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 4.3%
- Flights/day
- 0.78
- last 12 months
- Duration
- 1h 36m
- scheduled
- Distance
- 405 mi
Best airline from DCA to ACK
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 79% | 12 min | 3.1% | 384 |
| JetBlue Airways | 75% | 15 min | 5.9% | 272 |
Monthly on-time trend
Best time to fly from DCA to ACK
Aim for departures around 10 a.m. (86% on-time); avoid 3 p.m. departures (69%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 76% | 16 min |
| Tuesdaybest | 84% | 10 min |
| Wednesday | 84% | 9 min |
| Thursday | 73% | 19 min |
| Friday | 73% | 15 min |
| Saturday | 81% | 8 min |
| Sunday | 72% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft46%
- Airline operations23%
- National airspace system24%
- Weather7%
Frequently asked questions
- How often are flights from DCA to ACK delayed?
- 23% of DCA–ACK flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from DCA to ACK?
- Republic Airways has the best on-time record on this route at 79%, based on 384 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 (86% on-time), while departures around 3 p.m. have the worst (69%). 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 36m over 405 miles. Actual arrival times vary — flights on this route land 15+ minutes late 23% of the time.
- How often are DCA to ACK flights cancelled?
- 4.3% of scheduled flights on this route were cancelled between 2024-07 and 2026-07 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for DCA to ACK?
- Tuesday flights have the best record at 84% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 72%.
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Based on 656 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.