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Route Reliability

Houston → Portland

IAH–PDX · 1,825 miles · George Bush Intercontinental Airport to Portland International Airport

84
Pretty Reliable
WanderNerd Reliability Score
81%
Arrive within 15 minutes
5 min
Average arrival delay
0.9%
Cancelled
1,238
Flights in the data

Data through May 2026.

Who flies it best

Ranked by on-time arrivals. Historical results, not predictions.

  1. 1.United Airlines82%885 flights
  2. 2.Alaska Airlines79%353 flights

What the data says

The 12–3 PM departure wins.

IAH–PDX flights departing between 12–3 PM arrived on time 91% of the time, versus 78% between 6–9 PM.

Tuesday has been the better bet.

A small edge: 85% on time on Tuesdays against 79% on Thursdays.

Not much between United Airlines and Alaska Airlines.

On this route they all land within 79% to 82% on time. Pick on schedule and price.

Best historical flights

Ranked by on-time arrivals, minimum 100 flights. Past performance, not a promise.

Top flights by on-time rate

More flights on this route

The breakdown

On-time by weekday
  • Mon79%(177 flights)
  • Tue85%(174 flights)
  • Wed81%(174 flights)
  • Thu79%(177 flights)
  • Fri82%(176 flights)
  • Sat81%(166 flights)
  • Sun81%(179 flights)
On-time by departure window
  • 9 AM–12 PM87%(364 flights)
  • 12–3 PM91%(34 flights)
  • 3–6 PM78%(450 flights)
  • 6–9 PM78%(375 flights)
On-time trend by month
76%
May

Jun 68% → May 76% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202568%117
July 202584%120
August 202587%110
September 202584%96
October 202576%116
November 202580%90
December 202584%105
January 202688%93
February 202680%80
March 202678%89
April 202690%89
May 202676%118

Keep nerding

Based on 1,238 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.