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

Portland, ME (PWM) to Washington, DC (DCA) flight delay odds

71.3% of 1,153 official scheduled PWM-to-DCA flights arrived on time; 16.5% arrived at least 30 minutes late and 3.7% 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 SIGNALVariable
71.3%arrived on time
16.5%30+ min late
3.7%cancelled
1,153scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late10.1%all scheduled flights
120+ minutes late5.0%all scheduled flights
Diverted0.5%did not reach as scheduled
Average arrival+20.5 mincompleted flights

Which departure time was most reliable for PWM to DCA?

Among qualifying PWM-to-DCA departure window results, Early morning had the highest on-time rate: 85.7% of 364 flights. Evening was lowest at 60.6% across 340 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning36485.7%7.1%2.7%
Late morning16673.5%13.3%5.4%
Afternoon28364.3%23.0%2.5%
Evening34060.6%22.6%5.0%

Which weekday was most reliable for PWM to DCA?

Among qualifying PWM-to-DCA weekday results, Saturday had the highest on-time rate: 77.6% of 147 flights. Sunday was lowest at 63.3% across 169 flights.

DayFlightsOn time30+ minCancelled
Monday16864.9%19.6%7.7%
Tuesday17176.0%13.5%5.8%
Wednesday16872.0%16.1%1.8%
Thursday16571.5%16.4%1.8%
Friday16574.5%19.4%1.2%
Saturday14777.6%12.2%3.4%
Sunday16963.3%17.8%4.1%

Which airline was most reliable for PWM to DCA?

Among qualifying PWM-to-DCA airline results, Republic Airways had the highest on-time rate: 77.0% of 100 flights. PSA Airlines was lowest at 65.5% across 394 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines65574.0%16.0%2.3%
PSA Airlines39465.5%19.5%5.8%
Republic Airways10077.0%8.0%5.0%
Envoy Air450.0%0.0%0.0%

Which month was most reliable for PWM to DCA?

Among qualifying PWM-to-DCA month results, November 2025 had the highest on-time rate: 80.7% of 88 flights. January 2026 was lowest at 60.2% across 93 flights.

MonthFlightsOn time30+ minCancelled
July 20258861.4%18.2%9.1%
August 202511477.2%14.9%0.9%
September 202511674.1%17.2%0.0%
October 202512173.6%15.7%1.7%
November 20258880.7%12.5%1.1%
December 20259073.3%20.0%3.3%
January 20269360.2%14.0%7.5%
February 20268167.9%13.6%6.2%
March 20268865.9%18.2%10.2%
April 20268668.6%19.8%0.0%
May 20269472.3%18.1%2.1%
June 20269476.6%16.0%5.3%

What drove PWM to DCA delay minutes?

Late aircraft was the largest recorded PWM-to-DCA delay category, accounting for 43.9% of 29,680 BTS-attributed delay minutes during July 2025–June 2026.

Airline33.2%
Late aircraft43.9%
National airspace17.5%
Weather4.8%
Security0.6%
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.