Cheap flights from Seattle to Austin from $129

The cheapest month to fly to Austin from Seattle is in January. Flight prices, which tend to average around $252, are often lower during this time because this is during the off-season. If you’re not able to fly to Austin in January, then September is your next best option. Flight prices from Seattle to Austin during September average around $296.

The cheapest day to depart on your flight to Austin is on a Wednesday when prices can be found for as low as $317. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Austin for around $415.

In the afternoon is the cheapest time of day to fly from Seattle to Austin when you can find flight prices for as low as $329. Flying to Austin in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Austin are more costly in the evening, with an average ticket price of $395. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Seattle/Tacoma Intl to Austin Bergstrom for the best Seattle/Tacoma Intl - Austin Bergstrom flight prices

You are more likely to see cheaper flights to Austin from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Austin for around $330 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Austin from Seattle for as low as $288 on momondo.

Frontier is the most popular carrier operating from Seattle/Tacoma Intl to Austin Bergstrom

Alaska Airlines, Delta and Southwest are the top three most popular airlines that fly to Austin from Seattle according to our data. Alaska Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Austin. Keep in mind that there are 7 different airlines that fly to Austin on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 91% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $258.

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 6h 20m.

Phoenix (PHX) has the shortest average layover time for this route: 1h 20m.

10 flights are operational daily from Seattle to Austin as of May 2026. The most popular departure time for this route is 6:00PM, with 49% of flights per day taking off at noon.

As of May 2026, 76 flights take off from Seattle and land in Austin each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.