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

Portland, OR (PDX) to Washington, DC (IAD) flight delay odds

88.3% of 291 official scheduled PDX-to-IAD flights arrived on time; 7.9% 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 SIGNALLower disruption
88.3%arrived on time
7.9%30+ min late
0.7%cancelled
291scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late5.2%all scheduled flights
120+ minutes late2.1%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival-6.9 mincompleted flights

Which departure time was most reliable for PDX to IAD?

Among qualifying PDX-to-IAD departure window results, Early morning had the highest on-time rate: 97.5% of 158 flights. Night was lowest at 77.4% across 133 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning15897.5%1.3%0.0%
Night13377.4%15.8%1.5%

Which weekday was most reliable for PDX to IAD?

Among qualifying PDX-to-IAD weekday results, Saturday had the highest on-time rate: 92.9% of 42 flights. Friday was lowest at 81.0% across 42 flights.

DayFlightsOn time30+ minCancelled
Monday4290.5%9.5%0.0%
Tuesday4192.7%4.9%0.0%
Wednesday4090.0%7.5%0.0%
Thursday4283.3%11.9%0.0%
Friday4281.0%11.9%2.4%
Saturday4292.9%4.8%0.0%
Sunday4288.1%4.8%2.4%

Which airline was most reliable for PDX to IAD?

Only United Airlines met the PDX-to-IAD airline threshold: 88.3% of 291 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines29188.3%7.9%0.7%

Which month was most reliable for PDX to IAD?

Among qualifying PDX-to-IAD month results, October 2025 had the highest on-time rate: 100.0% of 31 flights. July 2025 was lowest at 48.4% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253148.4%35.5%3.2%
August 20253180.6%19.4%0.0%
September 20253096.7%3.3%0.0%
October 202531100.0%0.0%0.0%
November 202530100.0%0.0%0.0%
December 202515100.0%0.0%0.0%
March 20262792.6%3.7%0.0%
April 20263093.3%3.3%0.0%
May 20263193.5%3.2%0.0%
June 20263083.3%6.7%3.3%

What drove PDX to IAD delay minutes?

Airline was the largest recorded PDX-to-IAD delay category, accounting for 53.2% of 2,703 BTS-attributed delay minutes during July 2025–June 2026.

Airline53.2%
Late aircraft44.6%
National airspace2.2%
Weather0.0%
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.