Best Time to Fly ACK to DCA: On-Time Stats by Hour & Airline
Nantucket Memorial → Ronald Reagan Washington National
Data through July 2026 · Last updated October 18, 2026
283 flights were scheduled from Nantucket (ACK) to Washington (DCA) in the last 12 months, and 72.1% of those that flew arrived on time, 5.5 points below the US average of 77.6%.
Among 2 airlines, JetBlue led with 74.8% on time and Republic Airways was last with 70.1%.
Over 24 months, Monday was the most reliable day (84% on time) and July the worst month (64%).
The cancellation rate was 4.2% (US average 1.8%).
ACK to DCA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| JetBlue | 74.8% | 94 min | 4.2% | 120 |
| Republic Airways | 70.1% | 60 min | 4.3% | 163 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ACK to DCA
On-time arrival % by scheduled departure hour (local time), 559 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | Limited data | 1 | |
| 10am–11am | 78.0% | 2.9% | 244 |
| 11am–12pm | 76.7% | 0.0% | 30 |
| 12pm–1pm | 73.1% | 0.0% | 120 |
| 2pm–3pm | Limited data | 16 | |
| 3pm–4pm | Limited data | 5 | |
| 4pm–5pm | Limited data | 12 | |
| 5pm–6pm | 58.2% | 15.3% | 131 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ACK to DCA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Summer peak (Jun 15 - Aug 15) | 68.7% | -9.2 pts | 7.7% | 366 |
| All other days | 77.9% | — | 1.6% | 193 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).