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

Portland, ME (PWM) to Philadelphia, PA (PHL) flight delay odds

74.6% of 731 official scheduled PWM-to-PHL flights arrived on time; 13.3% arrived at least 30 minutes late and 3.6% 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
74.6%arrived on time
13.3%30+ min late
3.6%cancelled
731scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late8.3%all scheduled flights
120+ minutes late4.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+12.7 mincompleted flights

Which departure time was most reliable for PWM to PHL?

Among qualifying PWM-to-PHL departure window results, Early morning had the highest on-time rate: 82.4% of 391 flights. Afternoon was lowest at 65.4% across 321 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning39182.4%8.7%4.1%
Afternoon32165.4%18.7%2.8%

Which weekday was most reliable for PWM to PHL?

Among qualifying PWM-to-PHL weekday results, Saturday had the highest on-time rate: 80.4% of 102 flights. Thursday was lowest at 67.6% across 108 flights.

DayFlightsOn time30+ minCancelled
Monday10569.5%11.4%7.6%
Tuesday11178.4%9.9%7.2%
Wednesday9978.8%12.1%1.0%
Thursday10867.6%19.4%2.8%
Friday10579.0%9.5%1.0%
Saturday10280.4%13.7%1.0%
Sunday10168.3%16.8%4.0%

Which airline was most reliable for PWM to PHL?

Among qualifying PWM-to-PHL airline results, American Airlines had the highest on-time rate: 75.7% of 530 flights. PSA Airlines was lowest at 71.5% across 200 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines53075.7%12.3%1.7%
PSA Airlines20071.5%16.0%8.5%
Republic Airways1100.0%0.0%0.0%

Which month was most reliable for PWM to PHL?

Among qualifying PWM-to-PHL month results, May 2026 had the highest on-time rate: 90.4% of 52 flights. July 2025 was lowest at 65.2% across 112 flights.

MonthFlightsOn time30+ minCancelled
July 202511265.2%22.3%4.5%
August 202511977.3%12.6%0.8%
September 202510284.3%6.9%0.0%
October 202510069.0%10.0%1.0%
January 20265771.9%8.8%14.0%
February 20264376.7%11.6%7.0%
March 20263366.7%21.2%9.1%
April 20263488.2%8.8%0.0%
May 20265290.4%5.8%1.9%
June 20266066.7%21.7%1.7%

What drove PWM to PHL delay minutes?

Airline was the largest recorded PWM-to-PHL delay category, accounting for 44.9% of 15,733 BTS-attributed delay minutes during July 2025–June 2026.

Airline44.9%
Late aircraft37.1%
National airspace15.3%
Weather2.7%
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.