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

Houston, TX (IAH) to Portland, OR (PDX) flight delay odds

80.2% of 1,233 official scheduled IAH-to-PDX flights arrived on time; 11.9% 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
80.2%arrived on time
11.9%30+ min late
0.7%cancelled
1,233scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late6.2%all scheduled flights
120+ minutes late2.7%all scheduled flights
Diverted0.3%did not reach as scheduled
Average arrival+4.3 mincompleted flights

Which departure time was most reliable for IAH to PDX?

Among qualifying IAH-to-PDX departure window results, Late morning had the highest on-time rate: 86.0% of 365 flights. Evening was lowest at 76.9% across 674 flights.

Departure windowFlightsOn time30+ minCancelled
Late morning36586.0%9.3%0.0%
Afternoon19480.9%12.4%1.0%
Evening67476.9%13.2%1.0%

Which weekday was most reliable for IAH to PDX?

Among qualifying IAH-to-PDX weekday results, Wednesday had the highest on-time rate: 80.7% of 176 flights. Thursday was lowest at 78.7% across 178 flights.

DayFlightsOn time30+ minCancelled
Monday17980.4%12.3%0.0%
Tuesday17580.6%10.9%1.1%
Wednesday17680.7%12.5%1.1%
Thursday17878.7%11.2%0.6%
Friday17880.3%14.0%1.1%
Saturday16880.4%11.3%0.6%
Sunday17980.4%11.2%0.6%

Which airline was most reliable for IAH to PDX?

Among qualifying IAH-to-PDX airline results, United Airlines had the highest on-time rate: 81.2% of 880 flights. Alaska Airlines was lowest at 77.6% across 353 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines88081.2%12.0%0.6%
Alaska Airlines35377.6%11.6%1.1%

Which month was most reliable for IAH to PDX?

Among qualifying IAH-to-PDX month results, April 2026 had the highest on-time rate: 87.9% of 91 flights. June 2026 was lowest at 73.0% across 115 flights.

MonthFlightsOn time30+ minCancelled
July 202512379.7%9.8%2.4%
August 202511185.6%9.0%0.9%
September 20259684.4%11.5%0.0%
October 202511874.6%13.6%0.8%
November 20259080.0%12.2%0.0%
December 202510582.9%10.5%0.0%
January 20269486.2%6.4%1.1%
February 20268080.0%8.8%0.0%
March 20269175.8%17.6%2.2%
April 20269187.9%5.5%1.1%
May 202611975.6%18.5%0.0%
June 202611573.0%17.4%0.0%

What drove IAH to PDX delay minutes?

Late aircraft was the largest recorded IAH-to-PDX delay category, accounting for 46.9% of 15,356 BTS-attributed delay minutes during July 2025–June 2026.

Airline26.4%
Late aircraft46.9%
National airspace12.9%
Weather13.2%
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.