Best Time to Fly DCA to ACK: On-Time Stats by Hour & Airline
Ronald Reagan Washington National → Nantucket Memorial
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 72.8% of Washington (DCA) to Nantucket (ACK) flights arrived on time (283 scheduled flights). That is 4.9 points below the national average of 77.6%.
Among 2 airlines, Republic Airways led with 78.5% on time and JetBlue was last with 64.5%.
Over 24 months, Tuesday was the most reliable day (85% on time) and July the worst month (69%).
The cancellation rate was 4.2% (US average 1.8%).
DCA to ACK 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 |
|---|---|---|---|---|
| Republic Airways | 78.5% | 53 min | 2.5% | 163 |
| JetBlue | 64.5% | 58 min | 6.7% | 120 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DCA to ACK
On-time arrival % by scheduled departure hour (local time), 559 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 7am–8am | Limited data | 1 | |
| 8am–9am | Limited data | 27 | |
| 9am–10am | 88.1% | 0.0% | 43 |
| 10am–11am | 88.0% | 0.0% | 83 |
| 12pm–1pm | Limited data | 21 | |
| 1pm–2pm | Limited data | 29 | |
| 2pm–3pm | 72.8% | 4.7% | 86 |
| 3pm–4pm | 67.1% | 8.1% | 161 |
| 4pm–5pm | 84.8% | 6.5% | 108 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DCA to ACK
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) | 74.3% | -8.5 pts | 6.6% | 366 |
| All other days | 82.8% | — | 0.5% | 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).