SEA - SEL

$448 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 5/4. 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

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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Everything you should know

Cheapest round-trip
$865
Typical prices: $1,053-$603
China Airlines
Mon 9/28Thu 10/15
SEA - ICN • 1 stop
Cheapest non-stop
$1,053
Typical prices: $897-$355
Asiana Airlines
Sun 5/3Sun 5/10
SEA - ICN • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts and KAYAK users. AI can make mistakes.
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
+1
+1
Expert advice
Expert advice
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Top airlines
Cheapest • from $865 (round-trip)
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Top layover airports
Cheapest • Avg $1,089 (round-trip)
Shortest trip • 15h 05m (one-way)
Insights
Insights
Insights
Insights
Top routes
Cheapest
Most popular
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 7 weeks in advance save around 7% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 11% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seoul!
Flight Deals
Booking Insights
Expert advice
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, Sep 28 - Thu, Oct 15
China Airlines Logo
1:15 am - 7:35 pm
SEA
-
ICN
26h 20m
1 stop
China Airlines Logo
8:35 pm - 7:15 pm
ICN
-
SEA
14h 40m
1 stop
$865China Airlines
Sun, Sep 20 - Mon, Oct 5
China Airlines Logo
1:15 am - 7:35 pm
SEA
-
ICN
26h 20m
1 stop
China Airlines Logo
12:35 pm - 7:15 pm
ICN
-
SEA
22h 40m
1 stop
$866China Airlines
Sun, Sep 6 - Mon, Dec 7
China Airlines Logo
1:55 am - 7:05 pm
SEA
-
ICN
25h 10m
1 stop
China Airlines Logo
8:15 pm - 6:10 pm
ICN
-
SEA
14h 55m
1 stop
$871China Airlines
Mon, Sep 28 - Thu, Oct 15
China Airlines Logo
1:15 am - 7:35 pm
SEA
-
ICN
26h 20m
1 stop
China Airlines Logo
8:35 pm - 7:15 pm
ICN
-
SEA
14h 40m
1 stop
$878China Airlines
Sun, Sep 27 - Tue, Nov 17
China Airlines Logo
1:15 am - 11:15 am
SEA
-
ICN
18h 00m
1 stop
China Airlines Logo
8:15 pm - 6:10 pm
ICN
-
SEA
14h 55m
1 stop
$898China Airlines
Thu, Sep 10 - Wed, Sep 16
Hainan Airlines Logo
11:05 am - 8:25 pm
SEA
-
ICN
41h 20m
2 stops
Hainan Airlines Logo
9:30 pm - 9:05 am
ICN
-
SEA
27h 35m
2 stops
$904Hainan Airlines
Tue, Sep 1 - Sun, Sep 13
Multiple Airlines Logo
7:20 pm - 10:25 pm
SEA
-
GMP
35h 05m
2 stops
Multiple Airlines Logo
5:40 pm - 2:22 pm
GMP
-
SEA
36h 42m
2 stops
$949Multiple Airlines
Mon, Sep 14 - Mon, Sep 28
Multiple Airlines Logo
10:30 am - 10:25 pm
SEA
-
GMP
19h 55m
2 stops
Multiple Airlines Logo
8:10 am - 2:22 pm
GMP
-
SEA
22h 12m
2 stops
$1,031Multiple Airlines
Wed, Sep 16 - Sat, Oct 3
EVA Air Logo
1:30 am - 12:50 pm
SEA
-
GMP
19h 20m
1 stop
EVA Air Logo
1:50 pm - 7:20 pm
GMP
-
SEA
21h 30m
1 stop
$1,183EVA Air
Wed, Sep 16 - Sat, Oct 3
EVA Air Logo
1:30 am - 12:50 pm
SEA
-
GMP
19h 20m
1 stop
EVA Air Logo
1:50 pm - 7:20 pm
GMP
-
SEA
21h 30m
1 stop
$1,221EVA Air
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.

How much is a round-trip flight from Seattle to Seoul?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Seoul departing in September.

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 $576 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, Wednesday 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 Monday, 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 November, where tickets cost $838 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $1,186 and $1,163 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $1,074 on average.

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 7 weeks before departure, which saves you about 7% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Expert advice

Expert advice for your flight from Seattle to Seoul

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Robert Schrader

Robert Schrader

Expert on Korean Air and ICN

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.

John Walton

John Walton

Expert on Asiana Airlines

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.

Harriet Baskas

Harriet Baskas

Expert on SEA

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.

Good to know

Low seasonJanuary
Cheapest flight$448
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 8% 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.

Flights from Seattle to Seoul: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Seattle to Seoul 
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 for booking flights from Seattle to Seoul

  • 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 $448 for a one-way ticket and $865 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?

    Delta, American Airlines, Alaska 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 787-10 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?

    Star Alliance, SkyTeam, and oneworld 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 Asiana Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Seoul are Korean Air and Asiana Airlines. With an average price for the route of $898 and an overall rating of 8.4, Korean Air is the most popular choice. Asiana Airlines is also a great choice for the route, with an average price of $873 and an overall rating of 8.1.

  • 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 $405 or less one-way and $680 or less round-trip.

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 1205 reviews
8.1Food
8.3Comfort
8.2Entertainment
8.5Boarding
8.7Crew
Airline reviews

Always on time and flight crew were great. Boarding in Manila was a bit chaotic and disorganized compared to Incheon.

10.0 ExcellentOmer, Mar 2026
MNL - ICN
Read more Korean Air reviews

Always on time and flight crew were great. Boarding in Manila was a bit chaotic and disorganized compared to Incheon.

Never had a flight delay issue with Korean Air, that's why I always go with this airline.

Flight crew were very attentive and made this trip a pleasure. Plus the fact that this our first time flying business class.

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

Korean are so racist and when I ask question or directions they totally ignore me and say racist. Also they give me an rude attitude.

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.

The staff hold my luggage to steel and exchange my stub, i was very disappointed.

Kayak uses scammer sites to steal money from their victims.

Kayak along with airfare assay are attempting to steal my money. Charges are being pressed.

Customer service and attention to details. The food was good.

Felt like the oldest plane in Asiana Fleet. Screen was 5-6in only and no charging at all. Movie selection wasn't great.

I’d have rated Asiana good except an unfortunate incident in which I felt one of your employee didn’t really help us. During the first leg of the trip, the flight from LAX to ICN, I left my backpack on the plane. When I realized, I reported to one of your employee who promised me that it’d be taken care of, that my backpack will be there at HCM city. When we arrived there, HCM people had no idea and my backpack was still at Incheon airport who denied any knowledge whatsoever. I was left in the cold and felt helpless. I was very disappointed. I’d like someone to look into this and let me know.

It was my first time flying Asiana but i was very pleased with how professional and understanding the flight crew is with little kids. One flight attendant held my 3 year old daughter’s hand guiding her to the exit after landing while i had my hands full with luggage and my infant. She was very helpful.

The customer service was excellent. They noticed that our connecting flight was scheduled too closely for us to complete customs, so they changed the flight. Our initial flight was delayed, and they were able to get us on another flight, all without charging us any additional fees. I would fly them again anytime!

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.

Loved this first class flight! Awesome food, snacks and drinks. Comfortable seat with foot rest. Good movie. Very friendly crew! Only thing I would suggest is having a screen on seat back in front of me so I didn’t have to watch the movie on my phone.

The crew was very attentive, boarding was orderly. I really liked the way Alaska Airlines gives boarding passes and dropping off my bags. Very smooth.

Once we were in the air, the flight was nice and smooth. The flight was about twenty minutes late to begin with, though, and then we needed to wait to land for another plane to land first.

Flight crew great! No WiFi not great. Someone took my bag not great!

Alaska Airlines staff go out of their way to accommodate my fragile musical instrument, every time. They are unlike any other airline. I've experienced this can-do attitude on several flights with different staff, so this must be the culture of their company. I appreciate Alaska!

We never had an experience on Alaska Airlines. We missed our flight .

Flight was on time departure & arrival. Staff was efficient & attentive. Food was better than normal. Wish they had some sort of entertainment screens loke Delta. I would fly Alaska again though.

It was a bumpy flight but the crew was very attentive and made it a safe and enjoyable experience.

Very easy, stress free airline. Was a wonderful experience. Will use again

The final trip home wasn’t as bad as the trip there. Even with the paid upgrade the comfort level was mediocre at best.

One of the flight attendants was a little cranky. I appreciated the free wifi and plug to charge my laptop

No entertainment. Plane was so small had to pink tag a carry on ive used for 20 years easily on board. The fact the flight got in at midnight, had to wait for crew in fort wayne to allow the plane to approach the gate, THEN had to wait for bag on jet bridge made experience irritating at best.

Crew was great. Near on time departure and early arrival. Snacks are always meh. Not a fan of the "pay for everything including miles " proposal unless base flight rate going to be 100 bucks.

Would have been better if there was a nonstop flight from Tampa to Norfolk or Tampa to New Port News.

Overall Good! The weather delayed our takeoff from Atlanta and our arrival in Miami! If Mother Nature can mess up a flight she will do it every time!

The flight was smooth, the crew was great but the plane was quite old

Everything was great until I lost my water bottle and they can’t seem to locate it. I know I left it on the plane though.

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Okay considering we had weather delays which the Pilot notified us of immediately!

It was a problem because there was a delay where we sat before taking off from newark,then when landed in Toronto we sat on tarmac and they wouldn't let us out for a long period of time. When we finally were released to the airport in Toronto the attendant scanned our boarding pass that we were here for our connection to Brazil. We ran all the way to the gate and they said at the gate the door is shut so we can not let you on the plane. We explained that we were checked in by the attendant when we arrived at Toronto airport to go to Brazil and they should not have shut the door. We were ignored at the gate

Flight home was delayed multiple times, did not get home until 2am

the check-in lady at ORD was extremely rude and unprofessional. very disappointed as it was supposed to be a celebration for my wife's birthday and it really put a damper on things. if i wanted to be treated like trash, i would have flown Economy! (as opposed to business class)

My original flight was cancelled and then rebooked four hours later on a recovery flight, but I was checked in as stanby and had no seats so as a family of four we were concerned about not being seated altogether. Our flight then got delayed by another 1.5 hours and when seats were assigned at the gate, three of the four of us were together and we could get my wife closer, they offered no assistance.

I bought a ticket from Kayak. When I got to the airport, the was no ticket. I had to pay 5X to get to my destination. No response received from Kayak. I will NEVER use them again.

My wallet was stolen while I was sleeping on the plane.

Good boarding but extremely cold temperature in both flights (60 F!).

The whole plane smelled and felt old. The seats were very uncomfortable. Multiple delays. Extra fees.

Very rude gate attendants in San Francisco who didn’t let me bring my little carry on (smaller than usual size) and after boarding I realized that there still were a lot of overhead compartment space (like a full section available in some spots). That made me lose 30 minutes at my destination at 1am and it could have broken something fragile that I had in it

The most uncomfortable flight I’ve ever been on. I’m only 5,4” and barely had enough room to exist, couldn’t even fully relax my shoulders. Not sure why they bother with snacks. Half a coke and a single cookie?? Wow. Purchasable food looked gross too. Remember when airlines used to treat you like a human being?

Everything you need to know for your flight from Seattle to Seoul

Information on your arrival and departure airports