$77 Cheap Flights from Houston (IAH) to Seattle (SEA)

Houston (IAH) to Seattle (SEA) at a glance

Explore a range of options for flights from Houston (IAH) to Seattle (SEA) on this popular domestic route. You can choose between full-service airlines and budget carriers, allowing you to find the best itinerary that matches your budget and travel plans. As you prepare to discover the iconic sights and vibrant neighborhoods of Seattle, check out the key details for your journey from George Bush Intercontinental Airport (IAH) to Seattle-Tacoma International Airport (SEA).

• Fastest flight duration: around 4h 45m non-stop
• Route distance: roughly 1,900 miles (3,060 km)
• Flights per week: around 50+ flights with multiple daily departures on average
• Typical fares (one-way): economy tickets often range from $100–$450, depending on seasonality and how far ahead you book

Flights from George Bush Intercontinental Airport (IAH) to Seattle - Tacoma International Airport (SEA)

According to recent traveler bookings, the top airlines flying from Houston to Seattle are favored for their non-stop and one-stop options. Common layover cities include Denver International Airport (DEN) with a layover of approximately 1 hour and 30 minutes, Dallas-Fort Worth International Airport (DFW) with about a 1-hour layover, and Salt Lake City International Airport (SLC) with an estimated 1 hour and 15 minutes. This variety allows you to mix and match factors like price, total travel time, and cabin class to craft the ideal itinerary.

• United: This full-service airline provides both non-stop and one-stop options, with one-way ticket prices generally falling between $120 and $490. United handles around 43% of departures for this route, with a standard non-stop flight duration of 4 hours and 45 minutes.
• Alaska Airlines: Known for its full-service offerings, Alaska Airlines features non-stop and one-stop services, with one-way fares typically ranging from $110 to $450. It represents about 30% of departures on this route, with a typical non-stop travel time of 4 hours and 45 minutes.
• Frontier Airlines: As a low-cost carrier, Frontier Airlines offers one-stop service with one-way fares usually between $100 and $260. It contributes approximately 9% of departures on this route, with an in-flight duration of 5 hours and 45 minutes, totaling around 7 hours and 30 minutes including layovers.
• Delta: This full-service carrier specializes in one-stop flights, with one-way fares often ranging from $100 to $460. Delta accounts for about 8% of departures on this route, featuring an in-flight time of 5 hours and 45 minutes, culminating in a total journey time of roughly 7 hours and 30 minutes.
• American Airlines: Providing one-stop services, American Airlines is a full-service airline with one-way fares typically between $100 and $460. It also makes up around 8% of departures on this route, with an in-flight duration of 5 hours and 45 minutes and a total travel time of approximately 7 hours and 30 minutes.

Travelers flying from Houston to Seattle have the option to upgrade their flights. Alaska Airlines provides first class and business class service, while United and Delta both offer first class along with premium economy cabins for those seeking additional comfort during their journey.

Best time to fly from Houston (IAH) to Seattle (SEA)

The most popular months for travelers flying from Houston to Seattle are March, April, and June, when peak temperatures in Seattle reach up to 61°F in June. If you prefer quieter travel, consider September, the least busy time to visit with temperatures around 61.3°F and typically the lowest average one-way fare (around $214). Flight availability peaks in May, with approximately 65 flights per week, making it easier to find convenient departure times. January and February have the fewest flights, with approximately 42 flights per week.

• Cheapest time to fly: September usually offers good deals with average one-way fare around $214, roughly 12% cheaper than the yearly average.
• More budget-friendly months to fly: October and August typically offer average one-way fares of around $224.
• Most flight options: May has the highest number of flights from Houston to Seattle, with approximately 65 flights per week, giving you more flexibility in scheduling your trip.

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Houston (IAH) to Seattle (SEA)

• Houston to Seattle (HOU-SEA): William P. Hobby Airport (HOU) is located roughly 23 miles from George Bush Intercontinental Airport (IAH). One-way economy fares for this journey generally fall between $85 and $465, influenced by the time of year and advance booking. Travelers can choose from both non-stop and one-stop flights, with common layovers at Dallas-Fort Worth International Airport (DFW) and Denver International Airport (DEN). Major airlines operating on this route include Southwest Airlines, a low-cost option, and American Airlines. Additionally, first-class service is offered on this route.

How to find the best prices for flights from Houston (IAH) to Seattle (SEA)

Getting some of the best deals on flights from Houston to Seattle is all about timing and flexibility. Here are some key tips to help you save:

1. Best times to book and fly: cheaper fares are typically found when booking at least two months in advance, although most travelers tend to book between two to eight weeks ahead. Morning departures from 5 a.m. to 12 p.m. usually offer lower prices and are the most popular times to fly, while Wednesday flights generally provide cheaper options, even though Friday remains the most popular travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Seattle - Tacoma International Airport from George Bush Intercontinental Airport

Seattle welcomes travelers from Houston with a range of transport options based on price, convenience, and proximity. Seattle city center is approximately a 20-minute drive (covering about 14 miles) from Seattle - Tacoma International Airport, depending on traffic. Here's how to reach Seattle efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
• Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Seattle - Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles away on foot, while Tukwila Station, a train station, is situated about 4.3 miles from the airport and is best accessed by car.

Houston to Seattle Flights

The cheapest times to fly from Houston to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Houston to Seattle are during the month of October. You can find some of the cheapest flights from Houston to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Houston to Seattle

Sunday is one of the best days to book for cheap flights from Houston to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Houston to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Houston to Seattle in 2026. You can also book with separate airlines for your outbound and return journeys, from $77 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Houston to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Houston to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.