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

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

72.6% of 285 official scheduled ACK-to-DCA flights arrived on time; 11.6% arrived at least 30 minutes late and 4.9% 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 SIGNALHigher disruption
72.6%arrived on time
11.6%30+ min late
4.9%cancelled
285scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.0%all scheduled flights
120+ minutes late2.1%all scheduled flights
Diverted0.4%did not reach as scheduled
Average arrival+5.1 mincompleted flights

Which departure time was most reliable for ACK to DCA?

Among qualifying ACK-to-DCA departure window results, Late morning had the highest on-time rate: 82.3% of 124 flights. Evening was lowest at 56.9% across 65 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning12482.3%9.7%1.6%
Afternoon9670.8%10.4%2.1%
Evening6556.9%16.9%15.4%

Which weekday was most reliable for ACK to DCA?

Among qualifying ACK-to-DCA weekday results, Monday had the highest on-time rate: 82.5% of 40 flights. Sunday was lowest at 57.5% across 40 flights.

DayFlightsOn time30+ minCancelled
Monday4082.5%2.5%7.5%
Tuesday4175.6%7.3%7.3%
Wednesday3580.0%2.9%8.6%
Thursday4072.5%15.0%2.5%
Friday3982.1%12.8%2.6%
Saturday5062.0%16.0%4.0%
Sunday4057.5%22.5%2.5%

Which airline was most reliable for ACK to DCA?

Among qualifying ACK-to-DCA airline results, JetBlue Airways had the highest on-time rate: 77.7% of 121 flights. Republic Airways was lowest at 68.9% across 164 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways16468.9%11.6%7.3%
JetBlue Airways12177.7%11.6%1.7%

Which month was most reliable for ACK to DCA?

Among qualifying ACK-to-DCA month results, August 2025 had the highest on-time rate: 81.6% of 98 flights. July 2025 was lowest at 62.5% across 96 flights.

MonthFlightsOn time30+ minCancelled
July 20259662.5%12.5%11.5%
August 20259881.6%8.2%1.0%
September 20253464.7%14.7%0.0%
June 20264877.1%16.7%2.1%

What drove ACK to DCA delay minutes?

National airspace was the largest recorded ACK-to-DCA delay category, accounting for 45.4% of 3,337 BTS-attributed delay minutes during July 2025–June 2026.

Airline12.3%
Late aircraft42.3%
National airspace45.4%
Weather0.0%
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.