$365 Find Cheap Flights from Seattle to South Korea - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to South Korea departing on 8/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from Seattle to South Korea

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seoul
Incheon1 stop$898
Jeju City
Jeju City1 stop$829
Busan
Busan1 stop$782
Daegu
Daegu1 stop$1,439
Seoul
Incheon1 stop$898
Jeju City
Jeju City1 stop$829
Busan
Busan1 stop$782
Daegu
Daegu1 stop$1,439

Book Cheap Seattle to South Korea Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to South Korea that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to South Korea

Wed, Sep 2 - Tue, Sep 15
Cathay Pacific Logo
12:25 pm - 7:00 am
SEA
-
PUS
26h 35m
1 stop
Cathay Pacific Logo
2:20 pm - 10:05 am
PUS
-
SEA
35h 45m
1 stop
$782Cathay Pacific
Mon, Sep 14 - Mon, Sep 21
Cathay Pacific Logo
12:25 pm - 6:30 am
SEA
-
CJU
26h 05m
1 stop
Cathay Pacific Logo
7:30 am - 10:05 am
CJU
-
SEA
18h 35m
1 stop
$829Cathay Pacific
Sun, Oct 18 - Thu, Nov 5
China Airlines Logo
1:15 am - 9:30 am
SEA
-
PUS
16h 15m
1 stop
China Airlines Logo
11:50 am - 6:10 pm
PUS
-
SEA
23h 20m
1 stop
$896China Airlines
Mon, Sep 14 - Mon, Sep 28
Multiple Airlines Logo
12:25 pm - 10:25 pm
SEA
-
ICN
18h 00m
1 stop
Multiple Airlines Logo
9:30 pm - 2:22 pm
ICN
-
SEA
32h 52m
3 stops
$898Multiple Airlines
Wed, Oct 28 - Wed, Nov 11
Air Canada Logo
8:40 am - 4:10 pm
SEA
-
ICN
15h 30m
1 stop
Air Canada Logo
6:55 pm - 6:22 pm
ICN
-
SEA
40h 27m
1 stop
$924Air Canada
Wed, Oct 28 - Sat, Nov 21
Air Canada Logo
8:40 am - 4:10 pm
SEA
-
ICN
15h 30m
1 stop
Air Canada Logo
6:55 pm - 6:22 pm
ICN
-
SEA
40h 27m
1 stop
$955Air Canada
Mon, Aug 31 - Fri, Sep 18
Asiana Airlines Logo
10:40 am - 4:05 pm
SEA
-
ICN
13h 25m
1 stop
Asiana Airlines Logo
5:45 pm - 6:32 pm
ICN
-
SEA
16h 47m
1 stop
$1,226Asiana Airlines
Fri, Sep 4 - Fri, Sep 18
Asiana Airlines Logo
10:40 am - 4:05 pm
SEA
-
ICN
13h 25m
1 stop
Asiana Airlines Logo
5:45 pm - 6:32 pm
ICN
-
SEA
16h 47m
1 stop
$1,226Asiana Airlines
Sat, Oct 10 - Sat, Oct 24
Korean Air Logo
12:50 pm - 4:40 pm
SEA
-
ICN
11h 50mnonstop
Korean Air Logo
7:00 pm - 1:14 pm
ICN
-
SEA
10h 14mnonstop
$1,237Korean Air
Wed, Aug 19 - Wed, Aug 26
Korean Air Logo
1:20 pm - 4:40 pm
SEA
-
ICN
11h 20mnonstop
Korean Air Logo
4:40 pm - 11:00 am
ICN
-
SEA
10h 20mnonstop
$1,237Korean Air
Booking Insights

KAYAK's insights & trends for Seattle to South Korea flights

Get data-powered insights and trends into flights from Seattle to South Korea to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Seattle to South Korea flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to South Korea from Seattle found in the last 5 days was to Seoul, at $724 round-trip. The most popular route is from Seattle (SEA) to Incheon Intl Airport (ICN), and the cheapest round-trip airline ticket found on this route in the last 5 days was $724.

What is the cheapest time of day to fly to South Korea?

The average price for all round-trip flights from Seattle to South Korea depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to South Korea is generally in the afternoon, when round-trip flights cost $575 on average. The most expensive time of day to fly to South Korea is generally in the morning, which is peak travel time and where the average cost of a ticket is $868.

Can I save money by flying with a layover from Seattle to South Korea?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $1,194 on average.

What is the cheapest month to fly from Seattle to South Korea?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to South Korea, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to South Korea is April, when tickets cost $343 (return) on average. On the other hand, the most expensive months are December and June, when the average cost of round-trip tickets is $1,334 and $1,082 respectively.

What’s the cheapest day of the week to fly from Seattle to South Korea?

The average price of all round-trip flights from Seattle to South Korea clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Seattle to South Korea, look for departures on Wednesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from South Korea, Monday is the cheapest day to fly and Saturday is the most expensive.

How far in advance should I book a flight from Seattle to South Korea?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to South Korea, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to South Korea, you should book around 9 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low season

January

Cheapest flight

$365
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 37% lower on average.
Flight from Seattle to Seoul Incheon Airport

Flights from Seattle to South Korea: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Seattle to South Korea 
AngelitaFlew with Korean Air
SEA
-
ICN
Mar 2026
Get an earliest flight as possible because of less traffic
AvikFlew with Delta
SEA
-
ICN
Dec 2025
Pack food I guess , especially if traveling with little Kids
lizFlew with Asiana Airlines
SEA
-
ICN
May 2024
Do try to snooze on long haul flights, bring a good book to read, choose an aisle seat.

FAQs - booking South Korea flights

  • Should I get a visa before I fly from Seattle to South Korea?

    To travel to South Korea, United States citizens only need to have a passport that is valid at the time of their entry. Until the end of 2024, there is no need to get a visa when you are traveling for tourism or business purposes to South Korea, as you are allowed to stay in the country for up to 90 days without a visa. Do remember to make sure your passport has one blank page for an entry stamp.

  • What do I need to know about child car seat laws when I am departing my airport destinations in South Korea?

    When you travel in a car with a child in South Korea, they need to travel in a car seat facing to the rear until they are two years old and then in a car seat facing forward until they are four years old. After that children must travel in a booster seat until they are either six years old or they weigh more than 80 lbs.

  • What are some reasons to upgrade to first class when traveling on Delta Air Lines?

    Flying first class with Delta Air Lines on a Seattle to South Korea flight provides a premium travel experience. Passengers relish spacious seating, gourmet dining, and personalized service. Exclusive amenities like priority boarding and lounge access make the journey luxurious and stress-free. Enhanced privacy, extra legroom, and in-flight entertainment guarantee a more relaxed and enjoyable experience for discerning travelers.

  • What is a good choice for a sustainable airline on the Seattle to South Korea route?

    Korean Air is committed to sustainability, implementing eco-friendly practices to reduce its environmental impact. The airline invests in fuel-efficient aircraft, adopts green technologies, and promotes waste reduction. Initiatives like carbon offset programs and sustainable practices in operations showcase Korean Air's dedication to environmental responsibility and a more sustainable future in aviation.

  • How does KAYAK find such low prices on flights from Seattle to South Korea?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to South Korea.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to South Korea?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to South Korea is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to South Korea?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Seattle to South Korea with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to South Korea?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Seattle to South Korea up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to South Korea

  • Looking for a cheap flight? 25% of our users found tickets from Seattle to the following destinations at these prices or less: Incheon $443 one-way - $856 round-trip
  • One of the most popular airport destinations in South Korea is Incheon International Airport (ICN). You can fly here from Seattle Tacoma International Airport (SEA) on a direct flight available aboard Delta Air Lines, Korean Air, and Asiana Airlines.
  • Another popular airport destination in South Korea is Gimhae International Airport (PUS). To make the trip here from Seattle Tacoma International Airport, a terrific flight option is to take a one-stop flight or Korean Air that has a layover at Incheon International Airport.
  • When you plan on traveling early in the morning from Seattle Tacoma International Airport to South Korea, you might consider spending the night before your flight at the Hilton Seattle Airport & Conference Center, which offers accessibility to the airport through both a sky bridge and an airport shuttle.
  • Another airport destination in South Korea that is very popular with travelers is Jeju International Airport (CJU). An easy way to get here from Seattle Tacoma International Airport is to travel on a one-stop flight that utilizes Delta Air Lines and China Eastern Airlines, with a layover at Shanghai Pudong International Airport (PVG).
  • When departing from Seattle Tacoma International Airport aboard Delta Air Lines, it is good to know that this airline offers one of its Delta Sky Club locations in Concourse A at the airport, which is a wonderful spot to wait for your flight to South Korea.

Everything you need to know for your flight from Seattle to South Korea

Information on your arrival and departure airports