$341 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 3/12. 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.
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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$807
Jeju City
Jeju City1 stop$1,094
Busan
Busan1 stop$859
Daegu
Daegu2 stops$999
Seoul
Incheon1 stop$807
Jeju City
Jeju City1 stop$1,094
Busan
Busan1 stop$859
Daegu
Daegu2 stops$999

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

jue., abr. 9 - dom., abr. 26
Multiple Airlines Logo
10:10 am - 4:05 pm
SEA
-
ICN
13h 55m
1 stop
Multiple Airlines Logo
8:40 pm - 9:33 am
ICN
-
SEA
28h 53m
2 stops
$807Multiple Airlines
mié., mar. 11 - mié., mar. 18
Multiple Airlines Logo
6:24 pm - 4:20 pm
SEA
-
ICN
29h 56m
1 stop
Multiple Airlines Logo
9:40 pm - 9:05 am
ICN
-
SEA
27h 25m
2 stops
$808Multiple Airlines
mar., mar. 31 - sáb., abr. 18
Multiple Airlines Logo
6:24 pm - 3:45 pm
SEA
-
ICN
29h 21m
1 stop
Multiple Airlines Logo
9:10 pm - 10:25 am
ICN
-
SEA
29h 15m
2 stops
$811Multiple Airlines
sáb., mar. 7 - dom., may. 10
Asiana Airlines Logo
12:10 am - 5:20 am
SEA
-
ICN
12h 10mnonstop
Asiana Airlines Logo
9:00 pm - 2:55 pm
ICN
-
SEA
9h 55mnonstop
$813Asiana Airlines
dom., abr. 19 - mar., may. 19
Asiana Airlines Logo
12:55 am - 5:15 am
SEA
-
ICN
12h 20mnonstop
Asiana Airlines Logo
9:00 pm - 2:55 pm
ICN
-
SEA
9h 55mnonstop
$818Asiana Airlines
mar., mar. 3 - jue., mar. 12
China Airlines Logo
12:10 am - 10:50 am
SEA
-
PUS
17h 40m
1 stop
China Airlines Logo
11:50 am - 7:10 pm
PUS
-
SEA
23h 20m
1 stop
$920China Airlines
lun., mar. 2 - mar., mar. 10
China Airlines Logo
12:10 am - 10:50 am
SEA
-
PUS
17h 40m
1 stop
China Airlines Logo
11:50 am - 7:10 pm
PUS
-
SEA
23h 20m
1 stop
$981China Airlines
lun., feb. 9 - dom., mar. 1
Korean Air Logo
5:40 pm - 7:45 pm
SEA
-
TAE
33h 05m
2 stops
Korean Air Logo
7:40 am - 1:20 pm
TAE
-
SEA
22h 40m
1 stop
$999Korean Air
lun., feb. 9 - dom., mar. 1
Delta Logo
11:25 am - 7:45 pm
SEA
-
TAE
15h 20m
1 stop
Delta Logo
7:40 am - 1:20 pm
TAE
-
SEA
22h 40m
1 stop
$1,142Delta
lun., feb. 9 - dom., mar. 1
Korean Air Logo
5:40 pm - 7:45 pm
SEA
-
TAE
33h 05m
2 stops
Korean Air Logo
7:40 am - 2:44 pm
TAE
-
SEA
24h 04m
2 stops
$1,162Korean 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 72 hours was to Seoul, at $591 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 $591.

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 $886, 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 November, when tickets cost $843 (return) on average. On the other hand, the most expensive months are June and July, when the average cost of round-trip tickets is $1,292 and $1,282 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, Thursday 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 13 weeks before departure, which saves you about 9% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$341
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly and prices are also 25% 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 
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.

  • 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 $710 on average. Morning departures are around 37% 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 $363 one-way - $670 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 1188 reviews
8.1Food
8.3Comfort
8.7Crew
8.5Boarding
8.2Entertainment
Airline reviews

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

10.0 ExcellentOmer, Nov 2025
MNL - ICN
Read more Korean Air reviews

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.

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

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.

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.

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.

There is nothing critical to complain about but I would say the snacks are pretty bad Airline staff could be aggressive the way they move through the aisles and the plane I also got hustled for a small wallet size men bag and force the consolidated with my carry on item we're talking about a wallet size bag.

Departed on time and had an efficient boarding process. The inflight wifi was not working on one of the flights.

How can I review what was denied to me. Instead of offering to let me pay for the ticket I got booted of my flight with no way home and no choice but to purchase another ticket for 12 hours later. Filing a complaint with the DOT

From Las Vegas to Boise all went well. However, our flight was delayed in Boise and I missed my connecting flight from Seattle to Pasco. Moreover, the last flight to Pasco was full and I was booked on the 11:30 flight Sunday and given a hotel accommodation. However, I was scheduled to deliver the Sunday morning service at my church and needed to arrive no later than 10:00. Therefore, I booked a Delta flight scheduled to arrive in Pasco at 23:09. My piece of luggage checked in Las Vegas arrived in Pasco earlier today. I waited at the airport for over an hour last night to speak with an Alaska agent to no avail. I went back after church this morning in search of my piece of luggage and it could not be located. After waiting for 40 minutes to speak to the agent authorized to take my claim, he announced that he was closing the counter to assist on the flight line but not before providing me with a telephone number that would help me with filing my claim. Before I was able to make the call (due to other factors) I received a call from Alaska agent informing me that my luggage had just arrived and I am now waiting for it to be delivered. I deliberately took the more complicated route home to ensure that I would be home in plenty of time to prepare for myself for the Sunday service and accommodate my relatives’ needs. I believe the airport is undermanned given the number of flights coming in and going out. It was fiasco last night with three flights waiting for luggage and another flight landing within minutes. Today’s problems stemmed from a lack of cross training and a serious amount of cargo/baggage going out and too few people scheduled to cover.

The cabin crew was absolutely wonderful, the service was great and it was just a good flight overall.

I like them since I live in Alaska and I don't have much choice

The flight attendants were nice, but the cabin and seats were uncomfortable.

Food was terrible, noisy plane & would never pay to fly first class again. Seats in regular price are too small, no leg room & center aisle much too, too small. Seats in 1st class larger but not comfortable.

Overall, once we took off, our flight was good. Flight departure was significantly delayed due to mechanical issues. Upon arrival, it took wayyy too long to retrieve checked bags.

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The flight was comfortable and uneventful, which is what I desire

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

The plane was delayed substantially due to a mechanical problem, that being said, the airline was very fair with providing a meal coupon for us. I would rather arrive late on a mechanically sound plane than the alternative. The food served in the plane was just awful, however and I recommend a new catering company.

I waiting for 2 hrs to retrieve my luggage. Didn't get home till 3am.

The flight left late and I didn’t get a glass of bubbly upon boarding (which I’m used to when booking business class on other flights), but otherwise it was a pleasant flight with lovely, helpful crew members and I enjoyed my meal.

Flight cancellations, delays, mass confusion and disorganization! That’s Air Canada for you, nothing new. I would have chosen a different airline if it were an option, and Air Canada continues to prove they don’t care about their customers.

everything was fine. but paying for 1 piece of check-in luggage and denying passengers to board with carry-on luggage which by air line's standards does not fit is not acceptable. when one travels for a longer time one needs to have some essentials

Couldn't fit knees, only 1 toilet working, didn't get anything to drink cause the stewards were not able to get to us

Flight was canceled for a reason they knew hours before but did not mention. Next the gate chnage from 37 to 38 at least 10 times. Ridiculous.

The flight from SFO to YVR was delayed and my bag did not make it to my next flight from YVR to SYD. It took almost 3 days after I landed to get my bag and when I got it, it was filled with dust

Our biggest complaint about Air Canada is that if you don’t like your seat during check-in, there’s a fee to move elsewhere. On our flight from YUL to FFL, we were charged to change seats—just regular seats. What’s maddening is that the plane wasn’t even full; there were even a few people sleeping in the middle row sections (entire rows, completely empty), using them as beds. In my opinion, charging passengers for seat changes is a cash grab by Air Canada. They are definitely not the airline they were back in the day. I suppose they need to gouge the consumer now that they pay their attendants while on ground. One out of 10.

Nothing specific. Cabin temperature was too high for some reason.

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

Information on your arrival and departure airports