Cheap flights from Seoul to Seattle from $353

In general, November 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 $556. If you don’t want to visit Seattle in November, then you should wait until December to fly from Seoul, when ticket prices are also cheap, with an average price of $569.

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 $721. 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 $893.

Flying to Seattle from Seoul in the evening is the least expensive time of day to depart. momondo users have found prices as low as $745 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $754. Departure times in the afternoon 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 $692 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 $490 on momondo.

There are 4 cabin classes available to choose from on Seoul to Seattle/Tacoma Intl 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 23% on your flight if you consider stops on a Seoul to Seattle flight.

As of February 2026, prices for Seoul to Seattle flights are approximately 49% cheaper when compared to flights at the same time last year.

Hainan Airlines and EVA Air 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 41% 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: 78% 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 Taipei City (TPE) have the shortest average one-way travel time: 15h 10m.

Taipei City (TPE) has the shortest average layover time for this route: 1h 55m.

As of February 2026, there are 8 flights per day flying from Seoul to Seattle. The most common time of day flights depart is 8:00PM, with 75% of flights taking off in the evening.

The number of flights available between Seoul and Seattle is 56 per week as of February 2026. The most frequent departure day is Fri, with 18% of weekly flights leaving on this day.