BTS DATA COMPLETE THROUGH JUNE 2026HISTORICAL ODDS · NOT LIVE FLIGHT STATUS
DelayOddsKnow the route before you book
DCA→ACK

Washington, DC (DCA) to Nantucket, MA (ACK) flight delay odds

73.0% of 285 official scheduled DCA-to-ACK flights arrived on time; 10.2% arrived at least 30 minutes late and 2.8% were cancelled during July 2025–June 2026.

Source: U.S. Bureau of Transportation Statistics · Reporting window: July 2025–June 2026 · Updated September 16, 2026

HISTORICAL ROUTE SIGNALVariable
73.0%arrived on time
10.2%30+ min late
2.8%cancelled
285scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.2%all scheduled flights
120+ minutes late2.5%all scheduled flights
Diverted1.4%did not reach as scheduled
Average arrival+5.5 mincompleted flights

Which departure time was most reliable for DCA to ACK?

Among qualifying DCA-to-ACK departure window results, Late morning had the highest on-time rate: 85.3% of 75 flights. Afternoon was lowest at 68.3% across 208 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning7585.3%4.0%0.0%
Afternoon20868.3%12.5%3.8%

Which weekday was most reliable for DCA to ACK?

Among qualifying DCA-to-ACK weekday results, Wednesday had the highest on-time rate: 82.9% of 35 flights. Sunday was lowest at 57.5% across 40 flights.

DayFlightsOn time30+ minCancelled
Monday4070.0%10.0%2.5%
Tuesday4178.0%4.9%7.3%
Wednesday3582.9%8.6%0.0%
Thursday4067.5%15.0%2.5%
Friday3971.8%20.5%0.0%
Saturday5082.0%2.0%0.0%
Sunday4057.5%12.5%7.5%

Which airline was most reliable for DCA to ACK?

Among qualifying DCA-to-ACK airline results, Republic Airways had the highest on-time rate: 79.3% of 164 flights. JetBlue Airways was lowest at 64.5% across 121 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways16479.3%4.9%2.4%
JetBlue Airways12164.5%17.4%3.3%

Which month was most reliable for DCA to ACK?

Among qualifying DCA-to-ACK month results, August 2025 had the highest on-time rate: 88.8% of 98 flights. June 2026 was lowest at 60.4% across 48 flights.

MonthFlightsOn time30+ minCancelled
July 20259667.7%10.4%7.3%
August 20259888.8%1.0%0.0%
September 20253461.8%20.6%0.0%
June 20264860.4%20.8%2.1%

What drove DCA to ACK delay minutes?

Late aircraft was the largest recorded DCA-to-ACK delay category, accounting for 50.1% of 3,226 BTS-attributed delay minutes during July 2025–June 2026.

Airline16.7%
Late aircraft50.1%
National airspace27.0%
Weather6.2%
Security0.0%
This is historical evidence, not a forecast.

Weather, schedules and operations change. For a trip you have already booked, use the airline or airport for live status.