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

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

73.0% of 729 official scheduled PHL-to-PWM flights arrived on time; 18.0% arrived at least 30 minutes late and 3.4% 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
73.0%arrived on time
18.0%30+ min late
3.4%cancelled
729scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late11.0%all scheduled flights
120+ minutes late4.5%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+14.3 mincompleted flights

Which departure time was most reliable for PHL to PWM?

Among qualifying PHL-to-PWM departure window results, Late morning had the highest on-time rate: 80.2% of 182 flights. Night was lowest at 66.7% across 210 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning18280.2%11.0%3.8%
Afternoon18976.7%16.9%0.5%
Evening14868.2%23.6%2.7%
Night21066.7%21.0%6.2%

Which weekday was most reliable for PHL to PWM?

Among qualifying PHL-to-PWM weekday results, Tuesday had the highest on-time rate: 84.9% of 106 flights. Thursday was lowest at 61.7% across 107 flights.

DayFlightsOn time30+ minCancelled
Monday10572.4%16.2%3.8%
Tuesday10684.9%7.5%5.7%
Wednesday10577.1%13.3%1.9%
Thursday10761.7%29.0%1.9%
Friday10576.2%15.2%1.9%
Saturday10173.3%23.8%1.0%
Sunday10065.0%21.0%8.0%

Which airline was most reliable for PHL to PWM?

Among qualifying PHL-to-PWM airline results, American Airlines had the highest on-time rate: 74.1% of 528 flights. PSA Airlines was lowest at 70.0% across 200 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines52874.1%18.8%1.7%
PSA Airlines20070.0%16.0%8.0%
Republic Airways1100.0%0.0%0.0%

Which month was most reliable for PHL to PWM?

Among qualifying PHL-to-PWM month results, April 2026 had the highest on-time rate: 91.4% of 35 flights. July 2025 was lowest at 63.4% across 112 flights.

MonthFlightsOn time30+ minCancelled
July 202511263.4%28.6%4.5%
August 202511973.1%20.2%0.8%
September 202510284.3%11.8%0.0%
October 202510070.0%21.0%1.0%
January 20265766.7%10.5%14.0%
February 20264269.0%23.8%2.4%
March 20263369.7%18.2%9.1%
April 20263591.4%5.7%0.0%
May 20265375.5%17.0%1.9%
June 20265875.9%13.8%1.7%

What drove PHL to PWM delay minutes?

Late aircraft was the largest recorded PHL-to-PWM delay category, accounting for 49.9% of 15,254 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.7%
Late aircraft49.9%
National airspace11.2%
Weather4.2%
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.