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

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

73.2% of 291 official scheduled IAD-to-PDX flights arrived on time; 18.9% arrived at least 30 minutes late and 0.3% 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
73.2%arrived on time
18.9%30+ min late
0.3%cancelled
291scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late12.0%all scheduled flights
120+ minutes late3.4%all scheduled flights
Diverted0.0%did not reach as scheduled
Average arrival+11.2 mincompleted flights

Which departure time was most reliable for IAD to PDX?

Only Evening met the IAD-to-PDX departure window threshold: 73.2% of 291 scheduled flights arrived on time during July 2025–June 2026.

Departure windowFlightsOn time30+ minCancelled
Evening29173.2%18.9%0.3%

Which weekday was most reliable for IAD to PDX?

Among qualifying IAD-to-PDX weekday results, Friday had the highest on-time rate: 81.0% of 42 flights. Monday was lowest at 66.7% across 42 flights.

DayFlightsOn time30+ minCancelled
Monday4266.7%23.8%0.0%
Tuesday4178.0%17.1%0.0%
Wednesday4067.5%22.5%0.0%
Thursday4269.0%21.4%0.0%
Friday4281.0%16.7%0.0%
Saturday4273.8%16.7%0.0%
Sunday4276.2%14.3%2.4%

Which airline was most reliable for IAD to PDX?

Only United Airlines met the IAD-to-PDX airline threshold: 73.2% of 291 scheduled flights arrived on time during July 2025–June 2026.

AirlineFlightsOn time30+ minCancelled
United Airlines29173.2%18.9%0.3%

Which month was most reliable for IAD to PDX?

Among qualifying IAD-to-PDX month results, October 2025 had the highest on-time rate: 90.3% of 31 flights. July 2025 was lowest at 51.6% across 31 flights.

MonthFlightsOn time30+ minCancelled
July 20253151.6%41.9%0.0%
August 20253183.9%16.1%0.0%
September 20253083.3%13.3%0.0%
October 20253190.3%9.7%0.0%
November 20253070.0%13.3%0.0%
December 20251553.3%33.3%0.0%
March 20262763.0%25.9%0.0%
April 20263083.3%3.3%0.0%
May 20263174.2%16.1%0.0%
June 20263070.0%26.7%3.3%

What drove IAD to PDX delay minutes?

Airline was the largest recorded IAD-to-PDX delay category, accounting for 34.6% of 5,132 BTS-attributed delay minutes during July 2025–June 2026.

Airline34.6%
Late aircraft22.2%
National airspace27.8%
Weather15.4%
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.