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

New York, NY (JFK) to Boston, MA (BOS) flight delay odds

70.6% of 5,744 official scheduled JFK-to-BOS flights arrived on time; 18.8% arrived at least 30 minutes late and 4.2% 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
70.6%arrived on time
18.8%30+ min late
4.2%cancelled
5,744scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.5%all scheduled flights
120+ minutes late4.6%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+11.2 mincompleted flights

Which departure time was most reliable for JFK to BOS?

Among qualifying JFK-to-BOS departure window results, Early morning had the highest on-time rate: 87.6% of 1,142 flights. Evening was lowest at 57.8% across 1,128 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,14287.6%7.2%2.5%
Late morning97783.4%9.3%1.6%
Afternoon1,47463.2%24.6%5.2%
Evening1,12857.8%28.3%5.9%
Night1,02364.4%21.8%5.1%

Which weekday was most reliable for JFK to BOS?

Among qualifying JFK-to-BOS weekday results, Saturday had the highest on-time rate: 78.1% of 843 flights. Sunday was lowest at 62.9% across 812 flights.

DayFlightsOn time30+ minCancelled
Monday80868.3%18.4%7.3%
Tuesday83172.6%17.6%4.2%
Wednesday82373.3%17.6%2.6%
Thursday81768.1%21.7%3.5%
Friday81071.0%19.6%1.9%
Saturday84378.1%13.8%2.7%
Sunday81262.9%22.8%7.1%

Which airline was most reliable for JFK to BOS?

Among qualifying JFK-to-BOS airline results, Republic Airways had the highest on-time rate: 74.4% of 2,916 flights. Delta Air Lines was lowest at 66.6% across 368 flights.

AirlineFlightsOn time30+ minCancelled
Republic Airways2,91674.4%15.2%4.4%
JetBlue Airways2,46066.8%22.3%4.1%
Delta Air Lines36866.6%22.8%3.3%

Which month was most reliable for JFK to BOS?

Among qualifying JFK-to-BOS month results, May 2026 had the highest on-time rate: 81.5% of 437 flights. July 2025 was lowest at 62.4% across 495 flights.

MonthFlightsOn time30+ minCancelled
July 202549562.4%20.2%10.1%
August 202550080.0%14.0%1.0%
September 202554764.7%26.5%2.0%
October 202555667.1%22.3%2.5%
November 202545071.1%17.3%6.2%
December 202543263.9%25.7%3.7%
January 202648170.7%14.1%8.3%
February 202646266.5%18.8%8.7%
March 202651369.4%18.7%2.5%
April 202644380.4%13.3%0.0%
May 202643781.5%13.0%1.8%
June 202642872.7%19.2%3.5%

What drove JFK to BOS delay minutes?

Late aircraft was the largest recorded JFK-to-BOS delay category, accounting for 39.2% of 112,088 BTS-attributed delay minutes during July 2025–June 2026.

Airline23.4%
Late aircraft39.2%
National airspace35.8%
Weather1.4%
Security0.2%
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.