Cheap flights from Washington to South Korea from $377

If you aren’t able to travel to South Korea during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $870.

On average, the least expensive day to fly to South Korea from State of Washington is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $673. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from State of Washington to South Korea for around $907.

Flying to South Korea from State of Washington in the evening is the least expensive time of day to depart. momondo users have found prices as low as $714 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to South Korea from State of Washington in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Seattle/Tacoma Intl to Incheon Intl for the best Washington - South Korea flight prices

You are more likely to see cheaper flights to South Korea from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $879 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from State of Washington for as low as $564 on momondo.

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

Alaska Airlines, Delta, and Korean Air are the most popular carriers operating from Washington to South Korea

Alaska Airlines, Korean Air and Asiana Airlines are the top three most popular airlines that fly to South Korea from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to South Korea. Keep in mind that there are 11 different airlines that fly to South Korea on a routine basis, so you have a few additional options to choose from.

As of March 2026, there are 5 flights per day flying from State of Washington to South Korea. The most common time of day flights depart is 12:00PM, with 66% of flights taking off in the afternoon.

38 flights are operational weekly from State of Washington to South Korea as of March 2026. The most popular departure day for this route is Thu, with 26% of flights per week taking off on this day.