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

Boston, MA (BOS) to Buffalo, NY (BUF) flight delay odds

Historically, 73.9% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 1,235 flights.

HISTORICAL ROUTE SIGNALGenerally reliable
73.9%arrived on time
18.1%30+ min late
2.2%cancelled
1,235scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.4%all scheduled flights
120+ minutes late3.8%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+7.3 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 morning20283.7%9.4%2.0%
Late morning28682.9%11.5%0.0%
Afternoon31777.3%14.5%2.5%
Evening40161.3%29.2%3.0%

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
Monday19174.3%14.1%5.8%
Tuesday17278.5%12.8%2.3%
Wednesday16579.4%14.5%1.2%
Thursday18867.0%26.1%1.1%
Friday18269.8%22.0%1.1%
Saturday14182.3%11.3%0.0%
Sunday19669.4%23.0%3.1%

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
JetBlue Airways94771.3%19.7%2.5%
Republic Airways22182.8%12.2%1.4%
Envoy Air6782.1%13.4%0.0%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 202512369.1%26.0%0.8%
August 202512485.5%10.5%0.8%
September 20258770.1%19.5%1.1%
October 202510675.5%17.9%1.9%
November 20258478.6%14.3%0.0%
December 20257248.6%27.8%8.3%
January 20265052.0%26.0%10.0%
February 20263863.2%26.3%7.9%
March 202611068.2%25.5%0.9%
April 202610578.1%17.1%0.0%
May 202616785.6%8.4%1.2%
June 202616976.9%16.0%3.0%

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 aircraft63.9%
National airspace9.7%
Weather2.9%
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.