Cheap flights from Seattle to Seoul from $409

The month of August is another great option to travel to Seoul, with average flight prices from Seattle averaging around $376.

According to our data, Wednesday is the cheapest day to fly to Seoul from Seattle. The lowest ticket price found for a Wednesday departure recently was $663. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Seoul is Friday, with ticket prices averaging around $865.

Flying to Seoul from Seattle at noon is the least expensive time of day to depart. momondo users have found prices as low as $366 when looking at flights departing at noon. In the morning is when there is more demand to fly to Seoul, so prices are often more expensive at around $884 per ticket.

Fly from Seattle/Tacoma Intl to Incheon Intl for the best Seattle/Tacoma Intl - Seoul flight prices

You are more likely to see cheaper flights to Seoul from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $873 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from Seattle for as low as $427 on momondo.

There are 3 cabin classes available to choose from on Seattle to Seoul flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 9% on your flight if you consider stops on a Seattle to Seoul flight.

As of October 2026, prices for Seattle to Seoul flights are approximately 9% cheaper when compared to flights at the same time last year.

Korean Air, Delta, and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Seoul

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to Seoul from Seattle according to our data. Alaska Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to Seoul. Keep in mind that there are 7 different airlines that fly to Seoul on a routine basis, so you have a few additional options to choose from.

Vancouver (YVR) was the most common stop: 42% of momondo users choosing 1-stop flights on this route connected there.

Flights via Hong Kong (HKG) offer the lowest average round-trip price of $737.

Flights connecting via Vancouver (YVR) have the shortest average one-way travel time: 14h 31m.

San Francisco (SFO) has the shortest average layover time for this route: 1h 32m.

As of October 2026, 3 flights take off from Seattle and land in Seoul each day. The most common flight departure time for this route is 1:00PM, with 77% of daily flights taking off in the afternoon.

22 flights are operational weekly from Seattle to Seoul as of October 2026. The most popular departure day for this route is Fri, with 32% of flights per week taking off on this day.