Cheap flights from Houston to Seattle from $187

In general, October is the cheapest month to fly from Houston to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $305. If you don’t want to visit Seattle in October, then you should wait until January to fly from Houston, when ticket prices are also cheap, with an average price of $319.

On average, the least expensive day to fly to Seattle from Houston is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $457. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from Houston because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $593.

Flying to Seattle from Houston in the morning is the least expensive time of day to depart. momondo users have found prices as low as $488 when looking at flights departing in the morning. Flights to Seattle are more costly in the evening, with an average ticket price of $627. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Houston George Bush Intcntl to Seattle/Tacoma Intl for the best Houston - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Houston when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $390 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Houston for as low as $345 on momondo.

There are 4 cabin classes available to choose from on Houston to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Houston to Seattle/Tacoma Intl

Alaska Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Seattle from Houston according to our data. Alaska Airlines is the first choice among our users, with 49% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between Houston and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 155 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights at night have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Monday has historically seen more delays on average compared to the rest of the week.

According to our data, Alaska Airlines have had the least number of delays on this route over the last 12 months; with about 12% of their flights experiencing any sort of delay.

The number of flights available between Houston and Seattle is 11 per day as of August 2026. The most frequent departure time is 8:00AM, with 65% of daily flights leaving at noon.

As of August 2026, 80 flights take off from Houston and land in Seattle each week. The most common flight departure day for this route is Thu, with 21% of weekly flights taking off on this day.