£296 Cheap Flights from Seattle (SEA) to Seoul (ICN)

View £296 flight on Mon, 4 May 2026Opens in a new window

Flight 1

Popular airlines from Seattle-Tacoma International Airport (SEA) to Incheon Intl. Airport (ICN)

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Cheap Flights from Seattle (SEA) to Seoul (ICN)

Prices were available within the past 7 days and start at £296 for one-way flights and £610 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 4 May - Sat, 9 May
SEA
Seattle
ICN
Seoul
£610 Return, found 17 hours ago
£610
Return
found 17 hours ago
Select Alaska Airlines flight, departing Mon, 4 May from Seattle to Seoul, returning Sat, 9 May, priced at £610 found 17 hours ago
Korean Air
Tue, 28 Jul - Wed, 2 Dec
SEA
Seattle
ICN
Seoul
£663 Return, found 1 day ago
£663
Return
found 1 day ago
Select Korean Air flight, departing Tue, 28 Jul from Seattle to Seoul, returning Wed, 2 Dec, priced at £663 found 1 day ago
Asiana Airlines
Tue, 28 Jul - Wed, 2 Dec
SEA
Seattle
ICN
Seoul
£674 Return, found 1 day ago
£674
Return
found 1 day ago
Select Asiana Airlines flight, departing Tue, 28 Jul from Seattle to Seoul, returning Wed, 2 Dec, priced at £674 found 1 day ago
Korean Air
Tue, 28 Jul - Wed, 2 Dec
SEA
Seattle
ICN
Seoul
£676 Return, found 1 day ago
£676
Return
found 1 day ago
Select Korean Air flight, departing Tue, 28 Jul from Seattle to Seoul, returning Wed, 2 Dec, priced at £676 found 1 day ago
Korean Air
Tue, 28 Jul - Wed, 2 Dec
SEA
Seattle
ICN
Seoul
£678 Return, found 1 day ago
£678
Return
found 1 day ago
Select Korean Air flight, departing Tue, 28 Jul from Seattle to Seoul, returning Wed, 2 Dec, priced at £678 found 1 day ago
United
Mon, 11 May - Thu, 21 May
SEA
Seattle
ICN
Seoul
£800 Return, found 5 days ago
£800
Return
found 5 days ago
Select United flight, departing Mon, 11 May from Seattle to Seoul, returning Thu, 21 May, priced at £800 found 5 days ago
Qatar Airways
Wed, 25 Nov - Fri, 4 Dec
SEA
Seattle
ICN
Seoul
£836 Return, found 5 days ago
£836
Return
found 5 days ago
Select Qatar Airways flight, departing Wed, 25 Nov from Seattle to Seoul, returning Fri, 4 Dec, priced at £836 found 5 days ago
Air Canada
Wed, 11 Nov - Fri, 13 Nov
SEA
Seattle
ICN
Seoul
£841 Return, found 1 day ago
£841
Return
found 1 day ago
Select Air Canada flight, departing Wed, 11 Nov from Seattle to Seoul, returning Fri, 13 Nov, priced at £841 found 1 day ago
Cathay Pacific
Sat, 10 Oct - Mon, 22 Feb
SEA
Seattle
ICN
Seoul
£871 Return, found 3 days ago
£871
Return
found 3 days ago
Select Cathay Pacific flight, departing Sat, 10 Oct from Seattle to Seoul, returning Mon, 22 Feb, priced at £871 found 3 days ago
China Airlines
Mon, 12 Oct - Sun, 18 Oct
SEA
Seattle
ICN
Seoul
£884 Return, found 4 days ago
£884
Return
found 4 days ago
Select China Airlines flight, departing Mon, 12 Oct from Seattle to Seoul, returning Sun, 18 Oct, priced at £884 found 4 days ago

Find the cheapest month to fly from Seattle (SEA) to Seoul (ICN)

October is typically the cheapest month to fly

From £546 - £748 per traveller.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) cost?
One-way flights typically cost between £846 and £5,297 and return flights often range between £846 and £5,297. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
November is typically the cheapest month to fly from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN), with average return fares of approximately £1230. This is about 23% lower than the average price throughout the year. November often sees lower prices as it falls outside of peak holiday seasons, leading to reduced demand. Other cheap months to fly from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN) include January and September.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
Enter SEA to ICN and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) will differ from traveller to traveller. If you like to fly early, KE offers early morning flights. If price is the most important factor, AS typically offers the lowest fares. AS offers the most daily flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.), which is brilliant if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
Based on booking data from the past year, the cheapest months to fly from Seattle - Tacoma Intl. (SEA) to Seoul (ICN-Incheon Intl.) (ICN) are typically November and September, with average return flights around £1230. The most popular months for this route are August and May, which means you'll find plenty of flight options during these times. While there isn't a single month that is both the cheapest and most popular, if you prioritize savings, aim for November or September. If you prefer more flight choices and don't mind slightly higher fares, August and May are great options.
How many flights per day from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
There are approximately 3 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN). For even more choice, look at flights that include layovers, as there are around 112 connecting flights per day. Some common connection points include San Francisco Intl. (SFO), Los Angeles Intl. (LAX), and Vancouver Intl. (YVR).
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
The earliest flight from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN) typically departs at approximately 12:05 AM local time. This service is operated by American Airlines and is a seasonal service active in March. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
You'll typically find the most flights from Seattle - Tacoma Intl. (SEA) to Seoul (ICN-Incheon Intl.) on a Wednesday, with around 82 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Alaska Airlines, Delta Air Lines, and United Airlines. Flight schedules are consistent throughout the week, so you'll have a good selection of flights no matter which day you choose.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN) are between 12pm and 3pm. About 26% of passengers prefer this time. Many major carriers, including Korean Air, Delta Air Lines and United Airlines, offer flights during this window. This timing works well because it allows you to have a productive morning before heading to the airport, and you'll arrive in Seoul ready to start your day.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
Flying nonstop from SEA to ICN takes around 11 hours 50 minutes, with the route covering approximately 5,205 miles. Flights with a layover typically take 5 hours 30 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
Select the "Business class" and "First class" filters when looking for SEA to ICN flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seoul from Seattle - Tacoma Intl. (SEA)?
When traveling from Seattle - Tacoma Intl. (SEA) to Seoul, you can fly into Gimpo Intl. (GMP) and Incheon Intl. (ICN). Some flights may connect through major hubs like Los Angeles Intl. (LAX), Vancouver Intl. (YVR), Dallas-Fort Worth Intl. (DFW) before reaching Seoul. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (ICN-Incheon Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Emirates, Korean Air, Philippine Airlines, Qatar Airways, Singapore Airlines, Turkish Airlines, United, WestJet
Return price
£610
Distance
8326 km
Average flight time
27 hours 57 mins

Book with confidence

Compare flights from Seattle to Seoul easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Seattle to Seoul. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Incheon Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Seattle - Tacoma Intl. to Incheon Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Seattle - Tacoma Intl. (SEA) to Incheon Intl. (ICN)

The easiest way to view the best deals on flights from Seattle to Seoul today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Seattle - Tacoma Intl. to Incheon Intl. start at just £610 and range up to £884.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Seattle and Seoul
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Seattle to Seoul flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Seattle - Tacoma Intl. to Incheon Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Seattle to Seoul easily and book with confidence

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