SEA - SEL

$348 Find Cheap Flights from Seattle to Seoul

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 Seoul 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

KAYAK searches hundreds of travel sites at once for deals on flights to Seoul

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Seoul.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Seoul.
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Flight Deals

Cheap Flights from Seattle to Seoul (SEA-SEL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Seoul 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 Seoul

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, Oct 13 - Tue, Oct 28
Multiple Airlines Logo
6:39 pm - 3:45 pmSEA-ICN
53h 06m2 stops
Multiple Airlines Logo
9:15 pm - 2:20 pmICN-SEA
33h 05m1 stop
$753Multiple Airlines
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
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
Find Deal
Mon, Sep 29 - Mon, Oct 13
Air Canada Logo
10:00 am - 4:05 pmSEA-ICN
14h 05m1 stop
Air Canada Logo
5:45 pm - 10:31 pmICN-SEA
20h 46m1 stop
$802Air Canada
Find Deal
Sun, Nov 9 - Fri, Nov 21
Japan Airlines Logo
12:10 pm - 10:05 pmSEA-GMP
16h 55m1 stop
Japan Airlines Logo
12:05 pm - 9:50 amGMP-SEA
14h 45m1 stop
$876Japan Airlines
Find Deal
Wed, Nov 12 - Wed, Nov 26
Japan Airlines Logo
12:10 pm - 10:05 pmSEA-GMP
16h 55m1 stop
Japan Airlines Logo
8:00 am - 9:50 amGMP-SEA
18h 50m1 stop
$888Japan Airlines
Find Deal
Mon, Oct 20 - Sat, Nov 8
EVA Air Logo
1:30 am - 7:15 pmSEA-GMP
25h 45m1 stop
EVA Air Logo
1:50 pm - 5:30 pmGMP-SEA
20h 40m1 stop
$1,018EVA Air
Find Deal
Sun, Nov 9 - Fri, Nov 28
EVA Air Logo
12:10 am - 6:00 pmSEA-GMP
24h 50m1 stop
EVA Air Logo
1:50 pm - 6:10 pmGMP-SEA
21h 20m1 stop
$1,040EVA Air
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
Korean Air includes complimentary checked bags on long-haul flights.
Asiana's 9-seat rows on Boeing 777 offer more space.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
WestJet
Cheapest • from $752 (round-trip)
Korean Air
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Video guide: How to find cheap flights to Seoul
Watch video
Watch video
Watch video
Watch video
Top routes
SEA-ICN
Cheapest
SEA-ICN
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 6% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 17% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$751
Overall average: $1,089
Multiple Airlines
Mon 10/20Sat 11/1
SEA - ICN • 3 stops
Cheapest non-stop
$761
Typical prices: $992-1224
Asiana Airlines
Sun 11/2Mon 11/10
SEA - ICN • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seoul!
Expert advice

Expert advice for your flight from Seattle to Seoul

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Korean Air

Enjoy direct aisle access in Prestige Class on select aircraft for enhanced privacy.


Korean Air offers complimentary checked bags for all passengers on long-haul flights.

Read more about Korean Airby Robert Schrader
Asiana Airlines

Asiana's 9-seat rows on Boeing 777 offer more space than typical 10-seat configurations.


Choose Economy Smartium on A350 for extra legroom, priority boarding, and lounge access.

Airports
SEA

Use the SEA Spot Saver for expedited security screening without a paid program. Book online or via the flySEA app for free access.

Read more about SEAby Harriet Baskas
ICN

Take the AREX Express train for a quick 40-minute ride from ICN to Seoul Station, avoiding costly taxis and traffic delays.

Read more about ICNby Robert Schrader
Our travel experts
Robert Schrader

Robert Schrader

Expert on Korean Air and ICN

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
John Walton

John Walton

Expert on Asiana Airlines

John Walton

John Walton

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Harriet Baskas

Harriet Baskas

Expert on SEA

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Booking Insights

KAYAK's insights & trends for Seattle to Seoul flights

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

Find cheap flights to Seoul
Find cheap flights to Seoul

Planning a trip from Seattle to Seoul? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

What is the cheapest Seattle to Seoul flight route?

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

The cheapest return flight from Seattle to Seoul costs $624 on the route between Seattle (SEA) and Incheon Intl Airport (ICN). It is also the most popular route.

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

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

For Seattle to Seoul, Monday is the cheapest day to fly on average and Friday is the most expensive. Flying from Seoul back to Seattle, the best deals are generally found on Wednesday, with Saturday being the most expensive.

What is the cheapest month to fly from Seattle to Seoul?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Seoul, 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 Seoul is August, where tickets cost $900 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,523 and $1,331 respectively.

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

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.

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

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 Seoul, 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 Seoul, 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 seasonFebruary
Cheapest flight$348
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from Seattle to Seoul Incheon Airport

When to book flights from Seattle to Seoul

Are your dates flexible? Find out the best times to travel from Seattle to Seoul based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Seoul

  • Will I need a visa to travel from Seattle to Seoul?

    U.S. citizens traveling from Seattle to Seoul for tourism or business purposes can enter South Korea without a visa for up to 90 days. This is valid as long as the purpose of the visit is not to engage in paid work or long-term employment. Visa requirements can change over time, so it is essential to verify the current visa policy before traveling.

  • What are some good ways to get to downtown Seoul from Incheon International Airport?

    One choice would be to take the bus offered by Seoul Bus, which makes the trip in around 1h 14min, with buses leaving every hour or so. There is also a train operated by AREX that makes this trip in about 1 hour, with trains leaving every 15 minutes or so.

  • Which airport should I choose for my flight to Seoul?

    Incheon International Airport is by far the larger of the two airports and serves as a hub for over 80 airlines that are both domestic and international. If you do plan on traveling somewhere else in Korea after your flight to Seoul, Gimpo International Airport can make a much better choice since this airport focuses heavily on domestic travel to places like Busan, Daegu, and Jeju Island.

  • What are some of the amenities at Seattle Tacoma International Airport for passengers with limited mobility?

    Some features this airport offers include visual paging boards and assistive listening devices for individuals with hearing impairments. The airport features accessible restrooms equipped with spacious stalls, grab bars, and accessible sinks. There are tactile maps and wayfinding signage with braille that are available throughout the airport to assist passengers with visual impairments in navigating the terminals.

  • What is the cheapest flight from Seattle to Seoul?

    In the last 3 days, the lowest price for a flight from Seattle to Seoul was $348 for a one-way ticket and $751 for a round-trip.

  • Do I need a passport to fly between Seattle and Seoul?

    Yes

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Seoul?

    Alaska Airlines, Delta, American Airlines, and Asiana Airlines offer inflight Wi-Fi service on the Seattle to Seoul flight route.

  • Which aircraft models fly most regularly from Seattle to Seoul?

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Seattle to Seoul flight route.

  • Which airline alliances offer flights from Seattle to Seoul?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Seoul, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Seoul?

    There are nonstop flights from Seattle to Seoul on a daily basis.

  • Which is the best airline for flights from Seattle to Seoul, Korean Air or China Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Seoul are Korean Air and China Airlines. With an average price for the route of $1,082 and an overall rating of 8.4, Korean Air is the most popular choice. China Airlines is also a great choice for the route, with an average price of $962 and an overall rating of 8.3.

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

    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 Seoul.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul from Seattle 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 Seoul?

    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 to Seoul with an airline and back to Seattle with another airline.

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

    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 to Seoul from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Seoul

  • Looking for a cheap flight? 25% of our users found flights on this route for $370 or less one-way and $678 or less round-trip.
  • If you plan on taking one of the nonstop flights offered by Delta Airlines between Seattle Tacoma International Airport (SEA) and Incheon International Airport (ICN), there is a Delta Sky Club Lounge in Terminal A of Seattle Tacoma International Airport.
  • When flying on Delta Airlines to Seoul in first class, you get priority check-in and security clearance on the ground in Seattle as well as priority boarding. In the air, you get gourmet meals, large and comfortable seats, a dedicated flight attendant, and an entertainment system at your seat.
  • If you want a great way to get from the center of Seattle to Seattle Tacoma International Airport, consider the buses offered by King County Metro that make this trip in roughly 45 minutes. Sound Transit also offers its 1-Line that makes the trip in about 33 minutes.
  • Kids from 5 to 11 years old traveling alone on Korean Air will have a dedicated staff member that will assist them during every step of their trip. They will also have a dedicated crew member that will look after them on the flight and, on long flights such as this, the airline offers their Flying Mom service.
  • Turkish Airlines makes a good choice for a sustainable airline on this route. They continuously invest in modern and fuel-efficient aircraft, such as the Boeing 787 Dreamliner and Airbus A350. They have implemented renewable energy projects to reduce their reliance on fossil fuels. They have also participated in carbon offset programs, supporting projects that reduce or offset CO2 emissions.

Reviews of the top 5 airlines serving from Seattle to Seoul

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Seoul. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Seoul? 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
8.7Crew
8.5Boarding
8.1Food
8.3Comfort
8.2Entertainment
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.

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

They need to improve on how the plane lands cause it was not smooth at all.

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. :)

Staff was so nice and very helpful with directions aswell!

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 aircraft was massive (A-380) and became crowded with 400+ passengers on board.

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 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 Seoul

Information on your arrival and departure airports

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