Cheap flights from Seattle to Seoul from $393
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Seoul departing on 9/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Seoul
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Korean Air flights from Seattle to Incheon Intl Airport
Our best Korean Air deals on Seattle to Incheon Intl Airport flight tickets
Air Canada flights from Seattle to Incheon Intl Airport
Our best Air Canada deals on Seattle to Incheon Intl Airport flight tickets
See travel insights to Seoul from
How to get the cheapest flight ticket from Seattle to Incheon Intl Airport
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Incheon Intl Airport?
The cheapest month to fly to Incheon Intl Airport from Seattle is in February. Flight prices, which tend to average around $971, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of February, then departing from Seattle during the month April is also very affordable. Most momondo users find prices during this month for around $1,036.
What is the cheapest day to depart on your flight to Incheon Intl Airport?
The cheapest day to depart from Seattle to Incheon Intl Airport is on a Monday when prices can be found for as low as $888. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,038. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.
What is the cheapest time of day to depart on your flight to Incheon Intl Airport?
In the evening is the cheapest time of day to fly from Seattle to Incheon Intl Airport when you can find flight prices for as low as $847. Flying to Incheon Intl Airport in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,401 on average. Flights to Incheon Intl Airport from Seattle in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.
What is the cheapest Seattle/Tacoma Intl to Incheon Intl flight route?
Fly from Seattle/Tacoma Intl to Incheon Intl for the best Seattle/Tacoma Intl - Incheon Intl flight prices
How far in advance should I book a flight to Incheon Intl Airport?
You are more likely to see cheaper flights to Incheon Intl Airport from Seattle when booking 3 weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,223 when searching 3 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Seattle for as low as $1,060 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Incheon Intl flights?
There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Incheon Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Incheon Intl?
WestJet, Air Canada, and Korean Air are the most popular carriers operating from Seattle/Tacoma Intl to Incheon Intl
What airlines fly to Incheon Intl Airport?
Korean Air, Asiana Airlines and Air Canada are the top three most popular airlines that fly to Incheon Intl Airport from Seattle according to our data. Korean Air is the first choice among our users, with 42% of people opting to fly with this airline when traveling to Incheon Intl Airport. Keep in mind that there are 10 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Incheon Intl Airport on average per day?
7 flights are operational daily from Seattle to Incheon Intl Airport as of June 2025. The most popular departure time for this route is 2:00PM, with 100% of flights per day taking off in the afternoon.
How many flights depart from Seattle to Incheon Intl Airport on average per week?
53 flights are operational weekly from Seattle to Incheon Intl Airport as of June 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.
When to book flights from Seattle to Incheon Intl Airport
Cheap Seattle to Incheon Intl Airport (SEA to ICN) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Incheon Intl Airport
How far is Seattle/Tacoma Intl to Incheon Intl by plane?
Seattle/Tacoma Intl and Incheon Intl are 5192.0 mi apart from one another. By plane, this route typically takes 11h 40m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
As of June 2025, there are 10 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Incheon Intl Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Incheon Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Incheon Intl Airport.
What documentation or ID do you need to fly to Incheon Intl Airport?
The travel and health documents you'll need for your trip to Incheon Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Incheon Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Incheon Intl Airport?
Based on momondo bookings for flights between Seattle and Incheon Intl Airport, the leading plane model is Boeing 787-10 Dreamliner, making up 30.55% of the total bookings. Other popular models include Airbus A350-900 with 20.65%, Boeing 787-9 Dreamliner with 17.18%, and Boeing 777-200LR with 17.03%.
What is the most popular airline from Seattle to Incheon Intl Airport?
momondo data reveals that the most frequently booked airline on the route from Seattle to Incheon Intl Airport is Korean Air, representing 38% of all bookings. The subsequent popular airlines are Asiana Airlines at 33%, Air Canada at 11%, and Delta at 9%.
Best airlines flying from Seattle to Incheon Intl Airport
Compare and see reviews for airlines that fly from Seattle to Incheon Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $164 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $167 | Free Cancellation | Rating 8.0 7,950 reviews | |||
| PriceFrom $657 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $698 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $823 | Free Cancellation | Rating 7.1 9,531 reviews | |||
| PriceFrom $886 | Free Cancellation | Rating 8.3 738 reviews | |||
| PriceFrom $910 | Free Cancellation | Rating 8.2 440 reviews | |||
| PriceFrom $966 | Free Cancellation | Rating 8.4 1,088 reviews | |||
| PriceFrom $970 | Free Cancellation | Rating 7.3 3,848 reviews | |||
| PriceFrom $978 | Free Cancellation | Rating 8.4 1,202 reviews |
Korean Air Flights From Seattle to Incheon Intl Airport
Korean Air flight deals from Seattle to Incheon Intl Airport start from $966 round-trip. Over the 14 Korean Air flights for this route in a normal week, average airfare is usually $1,264 round-trip - but some users have found much cheaper deals with momondo.
Asiana Airlines Flights From Seattle to Incheon Intl Airport
Another popular option for Seattle to Incheon Intl Airport flights is Asiana Airlines (8.2/10, 440 ratings). Asiana Airlines flies from Seattle to Incheon Intl Airport around 4 times per week, with deals starting from $910 round-trip and rising to an average price of around $1,201.
Traveling to a place near Seoul?
Book flights to Seoul if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Seoul?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Seoul for you.
Can I find flights from Seattle to Seoul with flexible booking policies on momondo?
Yes. All flights to Seoul from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Seattle to Seoul?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seoul from Seattle.
I’m not ready to book a flight from Seattle to Seoul right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Seattle to Seoul flights. All you need is a valid email address and we will do the rest; it is that quick and easy.