$597 Cheap Korean Air flights Seattle (SEA) to Seoul (ICN)

View $597 flight on Wed, Oct 1, 2025Opens in a new window

$597 Cheap Korean Air flights Seattle (SEA) to Seoul (ICN)

Prices were available within the past 7 days and start at $597 for one-way flights and $1,220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Wed, Oct 1 - Thu, Oct 9
SEA
Seattle
ICN
Seoul
$1,220 Roundtrip, just found
$1,220
Roundtrip
just found
Select Korean Air flight, departing Wed, Oct 1 from Seattle to Seoul, returning Thu, Oct 9, priced at $1,220 just found
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
Popular airline
Air Canada
Distance
5203 mi
Average flight time
27 hours 30 mins

Frequently asked questions

How much is a Korean Air flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
You'll discover budget-friendly return Korean Air flights from $1,220 from SEA to ICN by organizing your results from "Price (lowest to highest)" on Expedia. Or look for deals from $597 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from SEA to ICN with Korean Air?
Search for round-trip or one-way flights to Seoul in January or February. You could find an affordable fare with Korean Air during these off-season months.
What is the cheapest time to book flights from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) with Korean Air?
Look for Korean Air flights from SEA to ICN about one month before you want to go. The most affordable time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of itinerary or ticket type, the best day of the week to book international airfare is usually Sunday. Friday can be the most expensive. Passengers who book on a Sunday can save an average of 17% compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Korean Air fly nonstop from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Yes, you can fly from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN) on any of Korean Air's 7 weekly direct flights. Apply Expedia's "Nonstop" and "Airline" filters to find the Korean Air flight that'll land at ICN at your preferred time.
How long does it take to fly from SEA to ICN with Korean Air?
Depart Seattle - Tacoma Intl. Airport (SEA) for Incheon Intl. Airport (ICN) on a nonstop Korean Air flight, and you'll be in the skies for about 11h 55m.
What is the earliest Korean Air flight from SEA to ICN?
The earliest flight from SEA to ICN with Korean Air leaves at 11:00AM UTC-8. You'll land at 3:55PM UTC+9. The last Korean Air flight of the day takes off at 11:00AM UTC-8 and arrives at 3:55PM UTC+9. With 20% fewer cancellations for departures before noon, setting off early is typically the best choice.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Korean Air fly into in Seoul?
Jump on a Korean Air flight from Seattle - Tacoma Intl. Airport (SEA) to Seoul, and you'll likely touch down at Incheon Intl. Airport (ICN). This is the airline's main hub in this destination.
What kind of luggage can I take on a Korean Air flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
On a standard economy flight with Korean Air from SEA to ICN, you can bring 2 checked-in bags up to 50 lb with dimensions not exceeding 62 inches in total. For carry-on, you can have 1 cabin bag weighing up to 39 lb and measuring no more than 21 inches x 15 inches x 7 inches. Size and weight restrictions may vary depending on your cabin class and fare type. To make sure you don't get caught with additional charges at the airport, double-check your Korean Air booking or look up the airline's website before loading up your suitcase.
Why fly with Korean Air from SEA to ICN?
With a 5-star airline rating, Korean Air is a favorite of many travelers heading from SEA to ICN. Plus, as a Korean Airlines Skypass and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does Korean Air fly from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Chances are you'll catch a Boeing 787-9 for your Korean Air flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN). However, you could end up on an alternative aircraft for operational reasons.
Can I change or cancel my Korean Air flight from Seattle - Tacoma Intl. Airport (SEA) to Incheon Intl. Airport (ICN)?
Changes are typically free within 24 hours of making your booking, but your airline may add a charge after that. For more details about altering your reservation, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your itinerary without being charged, check the "No cancel fee" or "Changes included" filter when planning your next break.

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*Available to One Key members.