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

Boston, MA (BOS) to Nantucket, MA (ACK) flight delay odds

84.6% of 253 official scheduled BOS-to-ACK flights arrived on time; 9.9% arrived at least 30 minutes late and 0.4% 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 SIGNALLower disruption
84.6%arrived on time
9.9%30+ min late
0.4%cancelled
253scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.9%all scheduled flights
120+ minutes late2.4%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival-1.4 mincompleted flights

Which departure time was most reliable for BOS to ACK?

Among qualifying BOS-to-ACK departure window results, Late morning had the highest on-time rate: 89.4% of 104 flights. Afternoon was lowest at 79.4% across 136 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning10489.4%8.7%0.0%
Afternoon13679.4%11.8%0.7%

Which weekday was most reliable for BOS to ACK?

Among qualifying BOS-to-ACK weekday results, Saturday had the highest on-time rate: 94.4% of 36 flights. Monday was lowest at 75.7% across 37 flights.

DayFlightsOn time30+ minCancelled
Monday3775.7%16.2%2.7%
Tuesday3786.5%8.1%0.0%
Wednesday3284.4%12.5%0.0%
Thursday3876.3%18.4%0.0%
Friday3691.7%5.6%0.0%
Saturday3694.4%2.8%0.0%
Sunday3783.8%5.4%0.0%

Which airline was most reliable for BOS to ACK?

Only JetBlue Airways met the BOS-to-ACK airline threshold: 83.8% of 240 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
JetBlue Airways24083.8%10.4%0.4%
Republic Airways13100.0%0.0%0.0%

Which month was most reliable for BOS to ACK?

Among qualifying BOS-to-ACK month results, June 2026 had the highest on-time rate: 89.2% of 65 flights. October 2025 was lowest at 68.4% across 19 flights.

MonthFlightsOn time30+ minCancelled
July 20256280.6%14.5%0.0%
August 20256288.7%8.1%0.0%
September 20253287.5%6.2%0.0%
October 20251968.4%26.3%5.3%
June 20266589.2%3.1%0.0%

What drove BOS to ACK delay minutes?

Late aircraft was the largest recorded BOS-to-ACK delay category, accounting for 52.3% of 2,553 BTS-attributed delay minutes during July 2025–June 2026.

Airline14.3%
Late aircraft52.3%
National airspace17.2%
Weather16.2%
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.