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

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

84.7% of 1,233 official scheduled PDX-to-IAH flights arrived on time; 7.9% arrived at least 30 minutes late and 0.6% 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
84.7%arrived on time
7.9%30+ min late
0.6%cancelled
1,233scheduled flights
Based on July 2025–June 2026; on time means arrival less than 15 minutes late.
60+ minutes late4.4%all scheduled flights
120+ minutes late1.8%all scheduled flights
Diverted0.2%did not reach as scheduled
Average arrival-0.6 mincompleted flights

Which departure time was most reliable for PDX to IAH?

Among qualifying PDX-to-IAH departure window results, Early morning had the highest on-time rate: 92.9% of 449 flights. Late morning was lowest at 77.7% across 269 flights.

Departure windowFlightsOn time30+ minCancelled
Early morning44992.9%3.1%0.7%
Late morning26977.7%8.6%1.1%
Afternoon36479.4%11.8%0.0%
Night15185.4%11.9%1.3%

Which weekday was most reliable for PDX to IAH?

Among qualifying PDX-to-IAH weekday results, Saturday had the highest on-time rate: 88.1% of 168 flights. Friday was lowest at 78.7% across 178 flights.

DayFlightsOn time30+ minCancelled
Monday17985.5%7.8%0.0%
Tuesday17587.4%7.4%0.0%
Wednesday17683.0%9.1%2.3%
Thursday17883.1%6.7%0.0%
Friday17878.7%12.9%1.1%
Saturday16888.1%6.0%0.0%
Sunday17987.2%5.6%1.1%

Which airline was most reliable for PDX to IAH?

Among qualifying PDX-to-IAH airline results, United Airlines had the highest on-time rate: 85.7% of 880 flights. Alaska Airlines was lowest at 82.2% across 353 flights.

AirlineFlightsOn time30+ minCancelled
United Airlines88085.7%8.5%0.6%
Alaska Airlines35382.2%6.5%0.8%

Which month was most reliable for PDX to IAH?

Among qualifying PDX-to-IAH month results, September 2025 had the highest on-time rate: 92.7% of 96 flights. July 2025 was lowest at 74.8% across 123 flights.

MonthFlightsOn time30+ minCancelled
July 202512374.8%12.2%2.4%
August 202511179.3%11.7%0.9%
September 20259692.7%5.2%0.0%
October 202511880.5%6.8%0.8%
November 20259080.0%5.6%0.0%
December 202510588.6%5.7%0.0%
January 20269489.4%9.6%1.1%
February 20268090.0%2.5%0.0%
March 20269184.6%8.8%2.2%
April 20269191.2%2.2%0.0%
May 202611985.7%9.2%0.0%
June 202611584.3%12.2%0.0%

What drove PDX to IAH delay minutes?

National airspace was the largest recorded PDX-to-IAH delay category, accounting for 34.8% of 11,508 BTS-attributed delay minutes during July 2025–June 2026.

Airline30.5%
Late aircraft33.1%
National airspace34.8%
Weather0.9%
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.