Cheap flights from Seoul to Seattle from $493

In general, August is the cheapest month to fly from Seoul to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $143. If you don’t want to visit Seattle in August, then you should wait until November to fly from Seoul, when ticket prices are also cheap, with an average price of $329.

On average, the least expensive day to fly to Seattle from Seoul is on a Monday. momondo users have found tickets for Monday departures for as low as $710. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Seoul because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $917.

Flying to Seattle from Seoul in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $758 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $758. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Seattle from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $706 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Seoul for as low as $585 on momondo.

You could potentially save up to 22% on your flight if you consider stops on a Seoul to Seattle flight.

As of May 2026, prices for Seoul to Seattle flights are approximately 44% cheaper when compared to flights at the same time last year.

Alaska Airlines, Hainan Airlines, and United Airlines are the most popular carriers operating from Seoul to Seattle/Tacoma Intl

Korean Air, Asiana Airlines and Alaska Airlines are the top three most popular airlines that fly to Seattle from Seoul according to our data. Korean Air is the first choice among our users, with 40% 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.

San Francisco (SFO) was the most common stop: 83% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dallas (DFW) offer the lowest average round-trip price of $752.

Flights connecting via San Francisco (SFO) have the shortest average one-way travel time: 14h 24m.

Dallas (DFW) has the shortest average layover time for this route: 3h 59m.

As of May 2026, there are 7 flights per day flying from Seoul to Seattle. The most common time of day flights depart is 7:00PM, with 71% of flights taking off in the evening.

The number of flights available between Seoul and Seattle is 54 per week as of May 2026. The most frequent departure day is Fri, with 19% of weekly flights leaving on this day.