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

Boston, MA (BOS) to Philadelphia, PA (PHL) flight delay odds

74.2% of 4,961 official scheduled BOS-to-PHL flights arrived on time; 16.6% arrived at least 30 minutes late and 2.9% 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 SIGNALVariable
74.2%arrived on time
16.6%30+ min late
2.9%cancelled
4,961scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.3%all scheduled flights
120+ minutes late4.3%all scheduled flights
Diverted0.1%did not reach as scheduled
Average arrival+10.8 mincompleted flights

Which departure time was most reliable for BOS to PHL?

Among qualifying BOS-to-PHL departure window results, Early morning had the highest on-time rate: 87.5% of 1,323 flights. Evening was lowest at 58.2% across 1,206 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning1,32387.5%6.0%2.7%
Late morning1,00782.7%9.9%1.7%
Afternoon1,40369.8%18.7%2.5%
Evening1,20658.2%30.8%4.7%

Which weekday was most reliable for BOS to PHL?

Among qualifying BOS-to-PHL weekday results, Saturday had the highest on-time rate: 83.5% of 538 flights. Sunday was lowest at 68.9% across 742 flights.

DayFlightsOn time30+ minCancelled
Monday75269.3%17.0%5.7%
Tuesday73376.0%16.0%2.7%
Wednesday70677.5%14.2%2.1%
Thursday75371.8%19.4%1.7%
Friday73775.0%18.3%1.1%
Saturday53883.5%10.4%1.5%
Sunday74268.9%19.0%5.1%

Which airline was most reliable for BOS to PHL?

Among qualifying BOS-to-PHL airline results, Frontier Airlines had the highest on-time rate: 80.7% of 57 flights. JetBlue Airways was lowest at 70.5% across 892 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines2,24973.7%16.9%2.8%
Republic Airways1,76376.4%14.6%3.3%
JetBlue Airways89270.5%20.3%2.5%
Frontier Airlines5780.7%7.0%1.8%

Which month was most reliable for BOS to PHL?

Among qualifying BOS-to-PHL month results, November 2025 had the highest on-time rate: 81.6% of 407 flights. July 2025 was lowest at 63.4% across 421 flights.

MonthFlightsOn time30+ minCancelled
July 202542163.4%25.2%6.7%
August 202540978.7%13.4%1.7%
September 202542875.5%15.4%1.9%
October 202546266.7%21.6%1.1%
November 202540781.6%10.3%3.2%
December 202536474.5%17.3%1.6%
January 202636572.9%14.8%7.4%
February 202636272.1%12.7%8.6%
March 202642972.0%19.6%1.2%
April 202641976.1%16.7%0.0%
May 202643778.5%15.1%1.1%
June 202645878.2%15.5%2.2%

What drove BOS to PHL delay minutes?

Late aircraft was the largest recorded BOS-to-PHL delay category, accounting for 55.8% of 98,881 BTS-attributed delay minutes during July 2025–June 2026.

Airline27.1%
Late aircraft55.8%
National airspace15.3%
Weather1.7%
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.