$467 Cheap Flights from Seattle (SEA) to Seoul (ICN)

View $467 flight on Wed, Sep 17, 2025Opens in a new window

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

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Cheap Flights from Seattle to Seoul (SEA-ICN)

Prices were available within the past 7 days and start at $467 for one-way flights and $807 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sat, Aug 23 - Tue, Aug 26
SEA
Seattle
ICN
Seoul
$807 Roundtrip, found 1 hour ago
$807
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Sat, Aug 23 from Seattle to Seoul, returning Tue, Aug 26, priced at $807 found 1 hour ago
Air Canada
Sun, Nov 2 - Tue, Nov 18
SEA
Seattle
ICN
Seoul
$846 Roundtrip, found 1 day ago
$846
Roundtrip
found 1 day ago
Select Air Canada flight, departing Sun, Nov 2 from Seattle to Seoul, returning Tue, Nov 18, priced at $846 found 1 day ago
China Airlines
Mon, Jan 12 - Thu, Jan 22
SEA
Seattle
ICN
Seoul
$891 Roundtrip, found 5 days ago
$891
Roundtrip
found 5 days ago
Select China Airlines flight, departing Mon, Jan 12 from Seattle to Seoul, returning Thu, Jan 22, priced at $891 found 5 days ago
WestJet
Wed, Sep 10 - Sat, Sep 13
SEA
Seattle
ICN
Seoul
$971 Roundtrip, found 1 hour ago
$971
Roundtrip
found 1 hour ago
Select WestJet flight, departing Wed, Sep 10 from Seattle to Seoul, returning Sat, Sep 13, priced at $971 found 1 hour ago
Cathay Pacific
Tue, Aug 26 - Thu, Sep 18
SEA
Seattle
ICN
Seoul
$993 Roundtrip, found 3 days ago
$993
Roundtrip
found 3 days ago
Select Cathay Pacific flight, departing Tue, Aug 26 from Seattle to Seoul, returning Thu, Sep 18, priced at $993 found 3 days ago
China Eastern Airlines
Mon, Jul 21 - Mon, Aug 18
SEA
Seattle
ICN
Seoul
$996 Roundtrip, found 10 hours ago
$996
Roundtrip
found 10 hours ago
Select China Eastern Airlines flight, departing Mon, Jul 21 from Seattle to Seoul, returning Mon, Aug 18, priced at $996 found 10 hours ago
Hainan Airlines
Thu, Oct 16 - Wed, Oct 22
SEA
Seattle
ICN
Seoul
$999 Roundtrip, found 1 day ago
$999
Roundtrip
found 1 day ago
Select Hainan Airlines flight, departing Thu, Oct 16 from Seattle to Seoul, returning Wed, Oct 22, priced at $999 found 1 day ago
Alaska Airlines
Thu, Sep 4 - Tue, Sep 16
PAE
Seattle
ICN
Seoul
$1,001 Roundtrip, found 5 days ago
$1,001
Roundtrip
found 5 days ago
Select Alaska Airlines flight, departing Thu, Sep 4 from Seattle to Seoul, returning Tue, Sep 16, priced at $1,001 found 5 days ago
EVA Airways
Wed, Sep 17 - Wed, Oct 22
SEA
Seattle
ICN
Seoul
$1,037 Roundtrip, just found
$1,037
Roundtrip
just found
Select EVA Airways flight, departing Wed, Sep 17 from Seattle to Seoul, returning Wed, Oct 22, priced at $1,037 just found
Turkish Airlines
Tue, Aug 12 - Wed, Sep 10
SEA
Seattle
ICN
Seoul
$1,093 Roundtrip, found 1 day ago
$1,093
Roundtrip
found 1 day ago
Select Turkish Airlines flight, departing Tue, Aug 12 from Seattle to Seoul, returning Wed, Sep 10, priced at $1,093 found 1 day ago

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

November is typically the cheapest month to fly

From $807 - $1,073 per traveler.

Graph displaying average flight prices per month

Flights from Seattle (SEA) to Seoul (ICN)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Incheon Intl.
Airlines serving
Air Canada, Air China, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Hainan Airlines, Hawaiian Airlines, Korean Air, Philippine Airlines, Turkish Airlines, United, WestJet
Roundtrip price
$807
Distance
5203 mi
Average flight time
27 hours 30 mins

Seattle to Seoul Flights

The cheapest times to fly from Seattle to Seoul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Seoul are during the month of August. You can find some of the cheapest flights from Seattle to Seoul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Seoul

Sunday is one of the best days to book for cheap flights from Seattle to Seoul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Seoul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Seoul in 2025. You can also book with separate airlines for your outbound and return journeys, from $467 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Seoul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Seoul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) cost?
Find affordable return tickets from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) starting at $1218. Reserve your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Delta flight leaving SEA on July 29 2025 and touching down at ICN. The price was last updated on July 2 2025 and has not changed since.
What is the cheapest month to fly from SEA to ICN?
The cheapest flights from SEA to ICN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Avoid the detours and fly straight to Incheon Intl. Airport (ICN) from Seattle - Tacoma Intl. Airport (SEA) with 3 carriers, including:

  • Delta Air Lines
  • Asiana Airlines
  • Korean Air

What is the cheapest airline that flies from SEA to ICN?
With fares starting at $596 for a one-way flight from SEA to ICN, Hawaiian Airlines is currently the cheapest airline on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on September 27 2025. Prices were last updated on July 2 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
When departing from Seattle - Tacoma Intl. Airport (SEA), you can choose from an average of 3 daily direct flights to Incheon Intl. Airport (ICN).
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Flights between SEA and ICN are busiest at 10 AM. For a less crowded experience and possibly cheaper tickets, look for a departure that's outside typical rush times.
What day of the week has the most flights from SEA to ICN?
Friday offers the most flights from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN). Consider taking off on this day and you'll have the best chance of finding a schedule that works for you.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
The first flight of the day leaving Seattle - Tacoma Intl. Airport (SEA) is at around 10:44AM UTC-8. Catch this flight and you'll touch down at Incheon Intl. Airport (ICN) at approximately 4:15PM UTC+9. The overall travel time is 12h 31m.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Flights from SEA to ICN have an average travel time of 12 hours and 11 minutes. The total distance between the two is 5,200 mi.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
To reach Incheon Intl. Airport (ICN) on schedule, select a flight that leaves Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seoul from Seattle - Tacoma Intl. Airport (SEA)?
Browse your flight options from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN). This is the only Seoul airport you can jet into if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) last-minute?
Last-minute fares from SEA to ICN are typically more expensive. To lock in the cheapest rates, start searching for flights well in advance. That said, if you're flexible with your travel plans, it's possible to land a cheap fare just before your departure.
Is it cheaper to book a SEA to ICN flight and hotel package?
You can save money by booking a SEA to ICN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your ideal accommodations and flights, consider other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
If you reserved your SEA to ICN flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of fare you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

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