$402 Cheap Flights from Seattle (SEA) to Seoul (ICN)

View $402 flight on Thu, Nov 27, 2025Opens in a new window

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

Today's featured flight deals from Seattle-Tacoma International Airport (SEA) to Incheon Intl. Airport (ICN)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Seattle to Seoul (SEA-ICN)

Prices were available within the past 7 days and start at $402 for one-way flights and $762 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Mon, Nov 24 - Thu, Dec 4
SEA
Seattle
ICN
Seoul
$762 Roundtrip, just found
$762
Roundtrip
just found
Select Air Canada flight, departing Mon, Nov 24 from Seattle to Seoul, returning Thu, Dec 4, priced at $762 just found
Air Canada
Mon, Nov 10 - Mon, Dec 1
SEA
Seattle
ICN
Seoul
$772 Roundtrip, just found
$772
Roundtrip
just found
Select Air Canada flight, departing Mon, Nov 10 from Seattle to Seoul, returning Mon, Dec 1, priced at $772 just found
Air Canada
Mon, Nov 24 - Mon, Jan 19
SEA
Seattle
ICN
Seoul
$786 Roundtrip, found 2 days ago
$786
Roundtrip
found 2 days ago
Select Air Canada flight, departing Mon, Nov 24 from Seattle to Seoul, returning Mon, Jan 19, priced at $786 found 2 days ago
Air Canada
Tue, Nov 11 - Thu, Dec 18
SEA
Seattle
ICN
Seoul
$786 Roundtrip, found 2 days ago
$786
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Nov 11 from Seattle to Seoul, returning Thu, Dec 18, priced at $786 found 2 days ago
Hawaiian Airlines
Wed, Nov 12 - Sun, Nov 16
SEA
Seattle
ICN
Seoul
$829 Roundtrip, found 3 hours ago
$829
Roundtrip
found 3 hours ago
Select Hawaiian Airlines flight, departing Wed, Nov 12 from Seattle to Seoul, returning Sun, Nov 16, priced at $829 found 3 hours ago
Delta
Tue, Nov 11 - Tue, Nov 18
SEA
Seattle
ICN
Seoul
$829 Roundtrip, just found
$829
Roundtrip
just found
Select Delta flight, departing Tue, Nov 11 from Seattle to Seoul, returning Tue, Nov 18, priced at $829 just found
Asiana Airlines
Tue, Nov 11 - Mon, Dec 1
SEA
Seattle
ICN
Seoul
$831 Roundtrip, just found
$831
Roundtrip
just found
Select Asiana Airlines flight, departing Tue, Nov 11 from Seattle to Seoul, returning Mon, Dec 1, priced at $831 just found
Korean Air
Thu, Nov 13 - Tue, Nov 18
SEA
Seattle
ICN
Seoul
$831 Roundtrip, just found
$831
Roundtrip
just found
Select Korean Air flight, departing Thu, Nov 13 from Seattle to Seoul, returning Tue, Nov 18, priced at $831 just found
United
Tue, Nov 11 - Tue, Nov 18
SEA
Seattle
ICN
Seoul
$844 Roundtrip, just found
$844
Roundtrip
just found
Select United flight, departing Tue, Nov 11 from Seattle to Seoul, returning Tue, Nov 18, priced at $844 just found
Alaska Airlines
Thu, Nov 13 - Thu, Nov 27
SEA
Seattle
ICN
Seoul
$849 Roundtrip, just found
$849
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, Nov 13 from Seattle to Seoul, returning Thu, Nov 27, priced at $849 just found

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

September is typically the cheapest month to fly

From $715 - $886 per traveler.

Alternative airports near Seoul

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gimpo Intl. GMP. Closest option available. Average driving time to city center is 20 minutes. Flights from $2,392
GMP
Gimpo Intl.
Closest
Average driving time to city center20 min
Flights from $2,392

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) cost?
Lock in a cheap one-way flight from $402 or cheap return flight from $762 from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
November is the most affordable month to fly from SEA to ICN. Traveling outside of peak seasons is often the key to finding better fares.
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 Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
While prices can change depending on when you travel, Asiana Airlines and Korean Air are popular choices for flights between Seattle - Tacoma Intl. Airport (SEA) and Incheon Intl. Airport (ICN). You can also compare airlines on Expedia and use the "Sort by" filter to find the cheapest fare for your SEA to ICN flight.
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.

Travel information

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, Emirates, Hawaiian Airlines, Korean Air, Singapore Airlines, Turkish Airlines, United, WestJet
Roundtrip price
$762
Distance
5203 mi
Average flight time
28 hours 3 mins

Book with confidence

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 November. 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 $402 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.

 

Seattle to Seoul Flights

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*Available to One Key members.