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

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

Historically, 70.6% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 5,744 flights.

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

When is this route most reliable?

The same route can behave differently through the day. These are scheduled departure windows, not actual departure times. Small time windows with fewer than 40 flights are withheld.

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%

Weekday comparison

Day-of-week results use at least 30 scheduled flights per row. Look for broad patterns, not tiny percentage differences.

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%

Airline comparison

Marketing-carrier results make codeshare flights easier to compare as travelers buy them. Dedicated route-airline reports require at least 160 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%

Monthly trend

Month-by-month results show whether a twelve-month average hides an unusual period.

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 reported delay minutes?

BTS cause minutes are reported for qualifying delayed flights. These shares describe recorded delay minutes—not the chance that a particular cause will affect your next flight.

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.