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

Philadelphia, PA (PHL) to Buffalo, NY (BUF) flight delay odds

Historically, 64.5% of scheduled reportable flights on this direction arrived on time in July 2025–June 2026. The sample includes 318 flights.

HISTORICAL ROUTE SIGNALHigher disruption
64.5%arrived on time
20.4%30+ min late
6.3%cancelled
318scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.9%all scheduled flights
120+ minutes late6.6%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+26.1 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
Evening5756.1%28.1%5.3%
Night21563.7%19.1%7.4%

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
Monday4858.3%16.7%12.5%
Tuesday4680.4%10.9%2.2%
Wednesday4669.6%10.9%13.0%
Thursday4463.6%20.5%2.3%
Friday4461.4%29.5%2.3%
Saturday4459.1%22.7%6.8%
Sunday4658.7%32.6%4.3%

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
PSA Airlines17359.0%23.7%7.5%
Republic Airways13373.7%15.8%4.5%
American Airlines1241.7%25.0%8.3%

Monthly trend

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

MonthFlightsOn time30+ minCancelled
July 20255750.9%28.1%12.3%
August 2025944.4%44.4%0.0%
September 20251566.7%20.0%0.0%
October 20256274.2%14.5%1.6%
November 20253056.7%26.7%6.7%
December 20252142.9%23.8%19.0%
February 20261752.9%23.5%11.8%
March 20263167.7%22.6%6.5%
April 20263080.0%10.0%3.3%
May 20262969.0%17.2%3.4%
June 20261794.1%5.9%0.0%

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.

Airline25.9%
Late aircraft58.5%
National airspace11.1%
Weather4.4%
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.