Nantucket (ACK) to Washington (DCA): On-Time Performance
Data through July 2026
Nantucket (ACK) to Washington (DCA) 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, 72% arrived on time, noticeably below the national average of 78%. Cancellations are the bigger caveat: 5.2% of scheduled flights never departed.
- On-time
- 72%
- arrived <15 min late
- Avg delay
- 20 min
- completed flights
- Cancelled
- 5.2%
- Flights/day
- 0.78
- last 12 months
- Duration
- 1h 41m
- scheduled
- Distance
- 405 mi
Best airline from ACK to DCA
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue Airwaysmost reliable | 76% | 21 min | 2.6% | 272 |
| Republic Airways | 69% | 20 min | 7.0% | 384 |
Monthly on-time trend
Best time to fly from ACK to DCA
Aim for departures around 11 a.m. (77% on-time); avoid 5 p.m. departures (62%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Mondaybest | 82% | 15 min |
| Tuesday | 76% | 15 min |
| Wednesday | 80% | 14 min |
| Thursday | 75% | 15 min |
| Friday | 71% | 28 min |
| Saturday | 64% | 26 min |
| Sunday | 59% | 27 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft51%
- Airline operations13%
- National airspace system36%
Frequently asked questions
- How often are flights from ACK to DCA delayed?
- 28% of ACK–DCA 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 20 minutes.
- Which airline is most reliable from ACK to DCA?
- JetBlue Airways has the best on-time record on this route at 76%, based on 272 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 11 a.m. have the best record (77% on-time), while departures around 5 p.m. have the worst (62%). 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 28% of the time.
- How often are ACK to DCA flights cancelled?
- 5.2% 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 ACK to DCA?
- Monday flights have the best record at 82% on-time. Day-of-week differences on this route are meaningful — Sunday trails at 59%.
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Based on 656 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.