IAH to SEA Flight Guide: Direct Routes, Prices, and Travel Tips
Cheapest flight found
$150
Last updated Mar 13, 2026
Prices by Month
Price History
Tracking the Jun 4, 2026 departure — the cheapest date we found.
Price Behavior: IAH → SEA
Based on 6 months of fare data collected by Trip Manta.
Lowest Fare
$150
Highest Fare
$269
Median Fare
$204
Price Spread
$119
Prices vary significantly — hourly tracking is especially valuable here.
Cheapest month to fly: June 2026 (from $150)
Most expensive month: July 2026 (from $269)
Biggest price drop caught: $239 between consecutive checks
Most frequent cheapest airline: Frontier
What This Means for You
Flights from Houston to Seattle range from $150 to $269, a $119 spread across the months we track. If your dates are flexible, June 2026 tends to have the lowest fares. Because prices on this route change significantly, setting up hourly price alerts gives you the best chance of catching a short-lived drop before it corrects. We have caught drops as large as $239 between hourly checks on this route.
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From
Houston (IAH)
To
Seattle (SEA)
Airport Information
Houston (IAH)
George Bush Intercontinental Airport (IAH) serves as a massive global gateway and a primary hub for United Airlines, offering five distinct terminals connected by an efficient underground train and an elevated Skyway system. Located approximately 23 miles north of downtown Houston, the airport features an impressive array of amenities including local art installations, diverse culinary options reflecting Houston's multicultural identity, and numerous lounges for frequent travelers.
Seattle (SEA)
Seattle-Tacoma International Airport (SEA), commonly referred to as Sea-Tac, is the primary commercial airport serving the Seattle metropolitan area and acts as a major hub for Alaska Airlines and Delta Air Lines. The facility is renowned for its Pacific Northwest aesthetic, featuring expansive glass walls that provide views of the airfield and mountains, as well as an extensive live music program that showcases local Pacific Northwest artists throughout the terminal concourses.
Frequently Asked Questions
How long is the flight from IAH to SEA?
A direct flight typically takes between 4 hours and 30 minutes to 5 hours, depending on wind patterns and weather conditions.
Which airlines fly non-stop from Houston to Seattle?
United Airlines and Alaska Airlines are the primary carriers offering daily non-stop service between George Bush Intercontinental and Sea-Tac.
Is there a time difference between Houston and Seattle?
Yes, Seattle is in the Pacific Time Zone, which is two hours behind Houston's Central Time Zone.
What is the best way to get from Sea-Tac to downtown Seattle?
The Sound Transit Link Light Rail offers a convenient and affordable connection from the airport to various downtown stations in about 40 minutes.
Do I need a passport for this flight?
No, since this is a domestic flight within the United States, a valid government-issued photo ID such as a driver's license is sufficient for TSA checkpoints.
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