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

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

65.9% of 1,153 official scheduled DCA-to-PWM flights arrived on time; 20.0% arrived at least 30 minutes late and 3.9% 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
65.9%arrived on time
20.0%30+ min late
3.9%cancelled
1,153scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late9.8%all scheduled flights
120+ minutes late4.1%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+14.4 mincompleted flights

Which departure time was most reliable for DCA to PWM?

Among qualifying DCA-to-PWM departure window results, Late morning had the highest on-time rate: 73.9% of 329 flights. Night was lowest at 54.3% across 311 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning11068.2%17.3%5.5%
Late morning32973.9%14.6%2.4%
Afternoon37766.6%19.9%3.4%
Night31154.3%28.0%5.5%

Which weekday was most reliable for DCA to PWM?

Among qualifying DCA-to-PWM weekday results, Saturday had the highest on-time rate: 75.5% of 147 flights. Sunday was lowest at 60.9% across 169 flights.

DayFlightsOn time30+ minCancelled
Monday16861.3%23.8%6.5%
Tuesday17171.3%12.3%5.8%
Wednesday16867.3%18.5%2.4%
Thursday16564.2%24.2%2.4%
Friday16561.8%21.8%2.4%
Saturday14775.5%15.6%2.0%
Sunday16960.9%23.7%5.3%

Which airline was most reliable for DCA to PWM?

Among qualifying DCA-to-PWM airline results, American Airlines had the highest on-time rate: 68.1% of 655 flights. Republic Airways was lowest at 60.0% across 100 flights.

AirlineFlightsOn time30+ minCancelled
American Airlines65568.1%19.7%2.3%
PSA Airlines39463.5%20.1%4.6%
Republic Airways10060.0%23.0%12.0%
Envoy Air4100.0%0.0%0.0%

Which month was most reliable for DCA to PWM?

Among qualifying DCA-to-PWM month results, November 2025 had the highest on-time rate: 81.8% of 88 flights. February 2026 was lowest at 53.1% across 81 flights.

MonthFlightsOn time30+ minCancelled
July 20258854.5%20.5%18.2%
August 202511475.4%17.5%0.0%
September 202511672.4%17.2%0.0%
October 202512166.1%15.7%1.7%
November 20258881.8%9.1%0.0%
December 20259066.7%20.0%2.2%
January 20269361.3%24.7%7.5%
February 20268153.1%27.2%4.9%
March 20268859.1%22.7%8.0%
April 20268660.5%24.4%0.0%
May 20269463.8%24.5%2.1%
June 20269470.2%20.2%5.3%

What drove DCA to PWM delay minutes?

Late aircraft was the largest recorded DCA-to-PWM delay category, accounting for 58.5% of 22,903 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.3%
Late aircraft58.5%
National airspace12.3%
Weather2.8%
Security0.2%
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.