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

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

81.8% of 609 official scheduled DTW-to-PWM flights arrived on time; 12.2% arrived at least 30 minutes late and 0.5% 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 SIGNALLower disruption
81.8%arrived on time
12.2%30+ min late
0.5%cancelled
609scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late7.2%all scheduled flights
120+ minutes late3.3%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival+3.9 mincompleted flights

Which departure time was most reliable for DTW to PWM?

Among qualifying DTW-to-PWM departure window results, Late morning had the highest on-time rate: 83.0% of 317 flights. Afternoon was lowest at 80.5% across 292 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning31783.0%11.7%0.3%
Afternoon29280.5%12.7%0.7%

Which weekday was most reliable for DTW to PWM?

Among qualifying DTW-to-PWM weekday results, Wednesday had the highest on-time rate: 87.2% of 86 flights. Sunday was lowest at 72.7% across 88 flights.

DayFlightsOn time30+ minCancelled
Monday8979.8%13.5%1.1%
Tuesday9083.3%13.3%0.0%
Wednesday8687.2%8.1%0.0%
Thursday8580.0%14.1%0.0%
Friday8785.1%10.3%0.0%
Saturday8484.5%8.3%1.2%
Sunday8872.7%17.0%1.1%

Which airline was most reliable for DTW to PWM?

Among qualifying DTW-to-PWM airline results, Delta Air Lines had the highest on-time rate: 85.4% of 397 flights. SkyWest Airlines was lowest at 74.2% across 132 flights.

AirlineFlightsOn time30+ minCancelled
Delta Air Lines39785.4%9.6%0.5%
SkyWest Airlines13274.2%18.9%0.0%
Republic Airways8076.2%13.8%1.2%

Which month was most reliable for DTW to PWM?

Among qualifying DTW-to-PWM month results, October 2025 had the highest on-time rate: 91.8% of 61 flights. January 2026 was lowest at 54.5% across 33 flights.

MonthFlightsOn time30+ minCancelled
July 20255886.2%12.1%0.0%
August 20256178.7%16.4%0.0%
September 20256085.0%13.3%0.0%
October 20256191.8%4.9%0.0%
November 20253680.6%11.1%2.8%
December 20254065.0%22.5%0.0%
January 20263354.5%30.3%0.0%
February 20262774.1%11.1%3.7%
March 20265475.9%18.5%0.0%
April 20265891.4%8.6%0.0%
May 20266191.8%0.0%1.6%
June 20266083.3%8.3%0.0%

What drove DTW to PWM delay minutes?

Airline was the largest recorded DTW-to-PWM delay category, accounting for 66.1% of 7,997 BTS-attributed delay minutes during July 2025–June 2026.

Airline66.1%
Late aircraft10.3%
National airspace15.5%
Weather8.1%
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.