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

Portland, ME (PWM) to Detroit, MI (DTW) flight delay odds

78.2% of 609 official scheduled PWM-to-DTW flights arrived on time; 14.4% arrived at least 30 minutes late and 0.7% 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 SIGNALGenerally reliable
78.2%arrived on time
14.4%30+ min late
0.7%cancelled
609scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.4%all scheduled flights
120+ minutes late5.1%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+9.4 mincompleted flights

Which departure time was most reliable for PWM to DTW?

Among qualifying PWM-to-DTW departure window results, Afternoon had the highest on-time rate: 79.1% of 516 flights. Evening was lowest at 72.8% across 92 flights.

Departure windowFlightsOn time30+ minCancelled
Afternoon51679.1%13.4%0.8%
Evening9272.8%20.7%0.0%

Which weekday was most reliable for PWM to DTW?

Among qualifying PWM-to-DTW weekday results, Wednesday had the highest on-time rate: 84.9% of 86 flights. Sunday was lowest at 72.7% across 88 flights.

DayFlightsOn time30+ minCancelled
Monday8973.0%21.3%1.1%
Tuesday9081.1%14.4%0.0%
Wednesday8684.9%8.1%1.2%
Thursday8576.5%11.8%0.0%
Friday8782.8%11.5%0.0%
Saturday8476.2%15.5%1.2%
Sunday8872.7%18.2%1.1%

Which airline was most reliable for PWM to DTW?

Among qualifying PWM-to-DTW airline results, Delta Air Lines had the highest on-time rate: 80.1% of 397 flights. SkyWest Airlines was lowest at 71.2% across 132 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines39780.1%12.1%0.8%
SkyWest Airlines13271.2%21.2%0.0%
Republic Airways8080.0%15.0%1.2%

Which month was most reliable for PWM to DTW?

Among qualifying PWM-to-DTW month results, October 2025 had the highest on-time rate: 93.4% of 61 flights. January 2026 was lowest at 57.6% across 33 flights.

MonthFlightsOn time30+ minCancelled
July 20255862.1%20.7%0.0%
August 20256172.1%18.0%1.6%
September 20256085.0%15.0%0.0%
October 20256193.4%3.3%0.0%
November 20253680.6%11.1%2.8%
December 20254065.0%32.5%0.0%
January 20263357.6%33.3%0.0%
February 20262781.5%11.1%3.7%
March 20265474.1%16.7%0.0%
April 20265887.9%6.9%0.0%
May 20266186.9%6.6%1.6%
June 20266080.0%10.0%0.0%

What drove PWM to DTW delay minutes?

Airline was the largest recorded PWM-to-DTW delay category, accounting for 45.3% of 13,146 BTS-attributed delay minutes during July 2025–June 2026.

Airline45.3%
Late aircraft23.9%
National airspace10.2%
Weather20.6%
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.