Nantucket (ACK) to Washington (DCA): On-Time Performance
Data through May 2026
Nantucket (ACK) to Washington (DCA) 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, 75% arrived on time. Cancellations are the bigger caveat: 4.2% of scheduled flights never departed.
- On-time
- 75%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 4.2%
- Flights/day
- 0.77
- last 12 months
- Duration
- 1h 41m
- scheduled
- Distance
- 405 mi
Best airline from ACK to DCA
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 80% | 14 min | 1.2% | 252 |
| Republic Airways | 71% | 17 min | 6.7% | 314 |
Monthly on-time trend
Best time to fly from ACK to DCA
Aim for departures around 10 a.m. (81% on-time); avoid 5 p.m. departures (66%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 86% | 9 min |
| Tuesday | 80% | 11 min |
| Wednesdaybest | 86% | 9 min |
| Thursday | 75% | 15 min |
| Friday | 80% | 17 min |
| Saturday | 65% | 19 min |
| Sunday | 59% | 29 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft43%
- Airline operations16%
- National airspace system41%
Frequently asked questions
- How often are flights from ACK to DCA delayed?
- 25% of ACK–DCA 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 16 minutes.
- Which airline is most reliable from ACK to DCA?
- JetBlue Airways has the best on-time record on this route at 80%, based on 252 flights. 2 airlines flew ACK–DCA frequently enough to compare in this period.
- What is the best time of day to fly from ACK to DCA?
- Departures around 10 a.m. have the best record (81% on-time), while departures around 5 p.m. have the worst (66%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ACK to DCA?
- The scheduled ACK–DCA flight time averages 1h 41m over 405 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are ACK to DCA flights cancelled?
- 4.2% of scheduled flights on this route were cancelled between 2024-06 and 2026-05 — several times the typical US rate, so consider earlier departures or backup options.
- What day of the week is most reliable for ACK to DCA?
- Monday flights have the best record at 86% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 59%.
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Based on 566 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.