Cheap flights from Seoul to Seattle from $387

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 $555. 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 $602.

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 $718. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday 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 $905.

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 $760 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $782. 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 $769 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 $597 on momondo.

There are 3 cabin classes available to choose from on Seoul to Seattle 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 1% on your flight if you consider stops on a Seoul to Seattle flight.

As of August 2026, prices for Seoul to Seattle flights are approximately 37% cheaper when compared to flights at the same time last year.

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

Asiana Airlines, Korean Air and Alaska Airlines are the top three most popular airlines that fly to Seattle from Seoul according to our data. Asiana Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 6 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 0% of flights between Seoul and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 0 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

As of August 2026, there are 7 flights per day flying from Seoul to Seattle. The most common time of day flights depart is 7:00PM, with 72% of flights taking off in the evening.

The number of flights available between Seoul and Seattle is 51 per week as of August 2026. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.