$348 Find Cheap Flights from Seattle to South Korea

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 10/23. 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

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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
Incheon3 stops$751
Jeju City
Jeju City2 stops$1,367
Busan
Busan2 stops$892
Daegu
Daegu1 stop$980
Seoul
Incheon3 stops$751
Jeju City
Jeju City2 stops$1,367
Busan
Busan2 stops$892
Daegu
Daegu1 stop$980

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

Mon, Oct 20 - Sat, Nov 1
Multiple Airlines Logo
11:10 pm - 6:45 pmSEA-ICN
51h 35m3 stops
Multiple Airlines Logo
8:35 pm - 2:55 pmICN-SEA
10h 20mnonstop
$751Multiple Airlines
Find Deal
Fri, Oct 24 - Sun, Oct 26
WestJet Logo
8:40 am - 6:45 pmSEA-ICN
18h 05m1 stop
WestJet Logo
9:15 pm - 2:20 pmICN-SEA
33h 05m1 stop
$752WestJet
Find Deal
Mon, Sep 29 - Wed, Nov 19
Air Canada Logo
5:30 am - 4:05 pmSEA-ICN
18h 35m1 stop
Air Canada Logo
6:55 pm - 7:16 pmICN-SEA
17h 21m1 stop
$755Air Canada
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Sun, Sep 28 - Wed, Nov 19
Air Canada Logo
5:30 am - 4:05 pmSEA-ICN
18h 35m1 stop
Air Canada Logo
6:55 pm - 10:06 pmICN-SEA
20h 11m1 stop
$756Air Canada
Find Deal
Sun, Nov 2 - Mon, Nov 10
Asiana Airlines Logo
12:10 am - 5:20 amSEA-ICN
12h 10mnonstop
Asiana Airlines Logo
9:00 pm - 1:55 pmICN-SEA
9h 55mnonstop
$761Asiana Airlines
Find Deal
Mon, Sep 29 - Tue, Oct 21
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
$781Asiana Airlines
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Thu, Oct 30 - Wed, Nov 5
Delta Logo
12:10 pm - 8:10 amSEA-PUS
28h 00m1 stop
Delta Logo
7:55 am - 1:20 pmPUS-SEA
22h 25m1 stop
$942Delta
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Thu, Oct 30 - Wed, Nov 5
Delta Logo
7:25 am - 8:45 pmSEA-PUS
21h 20m2 stops
Delta Logo
10:25 am - 9:00 amPUS-SEA
15h 35m1 stop
$947Delta
Find Deal
Sun, Mar 8 - Thu, Mar 12
Korean Air Logo
7:20 am - 7:45 pmSEA-TAE
20h 25m2 stops
Korean Air Logo
7:40 am - 2:20 pmTAE-SEA
22h 40m1 stop
$989Korean Air
Find Deal
Sun, Mar 8 - Thu, Mar 12
Korean Air Logo
7:00 am - 7:45 pmSEA-TAE
20h 45m2 stops
Korean Air Logo
7:40 am - 8:31 pmTAE-SEA
28h 51m2 stops
$1,000Korean Air
Find Deal
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 72 hours was to Seoul, at $624 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 72 hours was $624.

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.

No, with an average price for the route of $852, prices are generally cheapest when you fly direct.

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 August, when tickets cost $900 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,523 and $1,331 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 Mondays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from South Korea, Wednesday 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 2 weeks before departure, which saves you about 6% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$348
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Seattle to Seoul Incheon Airport

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.

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

    The cheapest time of day to fly to South Korea is generally at night, when round-trip flights cost $725 on average. Morning departures are around 36% cheaper than evening flights, on average. The most expensive time of day to fly to South Korea is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,401.

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 $370 one-way - $678 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.

Reviews of the top 5 airlines serving from Seattle to South Korea

 
Need help choosing which airline to fly with from Seattle to South Korea? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1140 reviews
8.1Food
8.3Comfort
8.2Entertainment
8.5Boarding
8.7Crew
Airline reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

8.0 ExcellentMatt, Aug 2025ATL - ICN
Read more Korean Air reviews

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I normally love Korean Air, but this trip was not great. We boarded the plan and were settling into our seats. My son and I use these leg swings and we used it on the trip over to Cambodia, but on the way back the flight attendant very rudely told us we could not use it and that it was against regulations. I asked to see the regulation, but never saw it. The food on this trip was horrible as well, Even my son's kids meal was disgusting so we didn't eat anything on the flight. Thankfully we brought snacks. Entertainment - what happened to the games?

This was an amazing flight. The crew was great. The service was great. The food provided was great.

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

Korean air has a little bit more seating space than Asiana air.

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Unfortunately, there has been a boarding and departure delay. However, as usual, the flight arrived earlier than the scheduled. There has been a turbulence in-between, it’s unavoidable. I couldn’t complain them.

Not many people, so you can lay down on two seats

The flat bed full lying position is not comfortable at all, this could be improved, it is at an awkward position which i dont have the same issues with other airlines business class.

The flight was uneventful and the crew was kind and professional. Really appreciate the option to order a vegan meal for the flight!

I love my Delta crew, they were so welcoming and helpful.

I absolutely loved my flight from Taipei to LAX. I was originally assigned to a different seat, however one of the stewardess noticed I was uncomfortable in my seat. She offered to move me to a more comfortable setting. Although she didn’t have to do what she did, I am more than grateful and thankful for her doing so. My longer flight felt much more comfortable, just by her taking notice. I really appreciate her.

Overall was a lovely experience. The crew were kind and courteous throughout the entire flight.

Sat next to a woman who had her period. Blood was on her seat and on the arm rest between us. I ended up having period blood on my jacket and shoes. Very gross!

Better organization of boarding procedures. Terrible leadership guiding people to gates.

I did not like how the plane landed. It was not smooth.

Been flying with China Airline over years many times. Good experience with them, no issues.

China Airlines crews are very excellent doing their job. Very friendly and hardworking. I will always choose China Airlines over and over. Thank you all for making my flight comfortable. God bless to all the staff. :)

Better screens, it would have been nice to have more comfortable seats.

2nd major delay due to maintenance issues. 1st delay missed my connecting flight.

It was great, but my bag was not loaded onto the connecting flight. I'm currently getting it resolved. If this isn't a problem, everything else was excellent.

The plane hasnt left im stuck in seatle still my flight has been grounded for almost 5 hours

My luggage didn’t arrive with my flight. Flight was delayed by nearly 2 hours while we sat on the plane and I almost missed my connecting flight and subsequently missed the last train from the airport so it took me another 2 hours to get to my destination after arriving, Crew skipped me several times when offering beverages, and I couldn’t get their attention at times because they wouldn’t even make eye contact with me. They didn’t give me a form for disembarking so I had to go to the back of the line after waiting an eternity for immigration. Paid for on flight wi- fi that didn’t work for most of the flight.

Love flying Asiana. Been using it for over a decade now.

Coming back to America was a peaceful flight everyone and everything was perfect

I had a bad experience coming from America to Thailand. On my connecting flight my check in suitcase was not put on the departing aircraft, I received my suitcase 24 hours after arriving in Bangkok and when I open my luggage my hand swelled up. The next morning when I put on an outfit from my suitcase my face swelled up and became numb. My entire vacation was ruined it seems that some kind of chemical was sprayed into suitcase and ruined my clothes and got me sick. The staff at my hotel called the airline and spoke to someone and they told me to file a complaint and gave my a website to do so. I did not file a complaint I felt like it would have fell on death ears. I had to throw away my brand new vacation clothes and suitcase and I had the worst vacation ever due to this happening to me.

The staff was courteous and the flight was very smooth. It was so nice to see the captain greeting the passengers at the end of the flights.

The beefsteak on the lunch menu was excellent! I usually do not eat airplane food. I loved it.

The staff and the boarding procedure were all amazing . The one flight was not equipped with WIFI which now adays seems odd. All in all the experience was good

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

For the price, it was a really good experience. There was no entertainment on board, so I couldn't really rate this, and I didn't order a meal. I appreciated that there was a free glass of wine.

Short flight. Everything was fine except the flight was delayed twice for a total of an hour.

My flight from New York to Canada and Canada to Brisbane was canceled, so I had to take united airlines instead flight from New York to Dubai then layover in Dubai 8 hours then from Dubai to Brisbane it was extremely difficult for me , it was a nightmare flying with Canadian airlines unfortunately.

I found the boarding easy and my seat was very comfortable as I had a lot of leg room. I am not too happy that I no longer have lounge access even though I used to get it with my TD credit card.

Flight cancelled. Major disruption to our travel. Do not use Air Canada from KC. To few flights.

Real smooth and easy, Real good leg room in coach!

There labor disputes cancelled my flight less than 24 hours before my boarding time but there customer service/website was easy enough to navigate and they rebooked me for no upcharge.

Re luggage I carried a backpack only. I did not check any bags in. However there were other passengers with carry on luggage going in the plane. My question is why are others allowed to have a carry on luggage inside the plane? Shouldn’t they have dropped it off at the gate? I’m asking because I could have brought the same thing instead of a backpack only. Please clarify for future reference. Thank you.

Like the service. Very hard to communicate or contact when have problems

Very bad, flight was cancelled due to strike and staff was unable to rebook us

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

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