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Route Reliability

Portland → Houston

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

89
Pretty Reliable
WanderNerd Reliability Score
85%
Arrive within 15 minutes
0 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 Airlines87%885 flights
  2. 2.Alaska Airlines81%353 flights

What the data says

The 6–9 AM departure wins.

PDX–IAH flights departing between 6–9 AM arrived on time 95% of the time, versus 78% between 9 AM–12 PM.

Friday is doing you no favors.

PDX–IAH flights arrived on time 90% of the time on Tuesdays. On Fridays: 81%.

United Airlines has a slight edge here.

United Airlines arrived on time 87% of the time on this route; Alaska Airlines managed 81%.

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
  • Mon85%(178 flights)
  • Tue90%(176 flights)
  • Wed83%(172 flights)
  • Thu83%(175 flights)
  • Fri81%(175 flights)
  • Sat89%(168 flights)
  • Sun86%(179 flights)
On-time by departure window
  • 6–9 AM95%(412 flights)
  • 9 AM–12 PM78%(294 flights)
  • 12–3 PM79%(364 flights)
  • 9 PM–12 AM88%(153 flights)
On-time trend by month
87%
May

Jun 76% → May 87% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202576%116
July 202579%119
August 202581%110
September 202593%96
October 202581%117
November 202582%89
December 202591%105
January 202690%93
February 202690%80
March 202688%89
April 202692%90
May 202687%119

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.