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Cheap Flights from Seattle to South Korea

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Seoul
Incheon1 stop$854
Busan
Busan1 stop$1,175
Jeju City
Jeju City1 stop$869
Daegu
Daegu1 stop$1,000
Seoul
Incheon1 stop$854
Busan
Busan1 stop$1,175
Jeju City
Jeju City1 stop$869
Daegu
Daegu1 stop$1,000
Booking Insights

Price, demand and travel trends for Seattle to South Korea flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Seattle to South Korea cheaper or more expensive than last year?

Fares from Seattle to South Korea are running about 34% lower than they were around this time last year, averaging $749 round-trip.

What are the cheapest fares from Seattle to South Korea right now?

Here are the cheapest round-trip fares from Seattle to South Korea on KAYAK in the last week:

• Incheon Intl (ICN) from $854
• Jeju City (CJU) from $869
• Busan Gimhae (PUS) from $1,175

What’s the cheapest month to fly from Seattle to South Korea?

August is the cheapest time of year to fly, with average fares of $345. Prices are highest in December, when average flight costs increase to around $1,517.

When is the best time to book flights from Seattle to South Korea?

Book your flights 21 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 72% compared to booking last-minute (within 2 weeks of departure).

Which airport in South Korea is the cheapest to fly to from Seattle?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into South Korea are:

• Incheon Intl (ICN) (avg. price $873)
• Busan Gimhae (PUS) (avg. price $995)
• Jeju City (CJU) (avg. price $1,026)

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

Wednesday tends to be the cheapest day to fly from Seattle to South Korea, while Sunday is the most expensive. Fares run about 65% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Seattle to South Korea?

Data from the past 12 months shows it's cheapest to fly to South Korea during the afternoon with average prices of $714. The evening is the most expensive time to fly, with average prices of $1,095.

Key details for Seattle to South Korea flights

Low season

December

Cheapest flight

$396
Beat the crowds with an average 57% drop in travelers.
The most popular month to fly with an average 73% increase in travelers.
One-way flight from Seattle to Incheon Intl Airport

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

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

Your Seattle to South Korea flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Seattle to South Korea?

    Fares from Seattle to South Korea are around their usual level right now. A round-trip under $359 is considered a good deal, so it's worth keeping an eye out, or setting a Price Alert to catch price changes.

  • How much should I budget for a flight from Seattle to South Korea?

    Over the past 12 months, round-trip fares from Seattle to South Korea have ranged from $359 to $1,146.

  • What are the main airports serving South Korea?

    South Korea has 15 airports. The three busiest are Incheon Intl (ICN) (97% of arrivals), Busan Gimhae (PUS) (3%) and Jeju City (CJU) (0%).

  • What airlines fly nonstop from Seattle to South Korea?

    Based on the flight schedule for the next 3 months, 3 airlines offer nonstop flights on this route:

    • Korean Air
    • Delta
    • Alaska Airlines

  • Where in South Korea can I fly nonstop from Seattle?

    Based on the flight schedule for the next 3 months, you can only fly nonstop from Seattle to Seoul.

  • Is it cheaper to fly with a layover from Seattle to South Korea?

    Yes. Nonstop flights from Seattle to South Korea average $871 over the past 12 months. Flights with a layover can cost less, cheapest when connecting through Hong Kong Intl (HKG), with average fares of $867.

  • How long is a flight from Seattle to South Korea?

    Flights from Seattle to South Korea take 12h 03m on average.

  • How often are flights from Seattle to South Korea delayed and what's the average delay?

    19% of flights on this route are delayed by at least 15 minutes. The average delay is 2h 06m.

  • Which cabin classes are available on flights from Seattle to South Korea?

    On flights from Seattle to South Korea you can book Economy Class, Premium Economy Class or Business Class.

  • What are some popular landmarks in South Korea?

    KAYAK travelers' favorite landmarks in South Korea include:

    • Haeundae Beach
    • Gwangalli Beach
    • Goyang Stadium
    • Dongdaemun Market

  • What are the earliest and latest flights from Seattle to South Korea?

    The earliest nonstop flight from Seattle to South Korea departs at 12:10 am and the latest departs at 1:40 pm. Nonstop flights take about 12h 03m.

  • 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.

Your guide to booking Seattle to South Korea flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 21 weeks before your trip. KAYAK data shows fares in this window are around 72% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for August when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Wednesday is usually the cheapest. Flights on Sunday cost about 65% more on average, so being flexible with your travel dates could help you save.
  • If arriving on time matters more than price, consider flying with one of the most punctual airlines on this route: Delta, Alaska Airlines, Korean Air, Asiana Airlines and Hawaiian Airlines.
  • If you're looking to save, Incheon Intl (ICN) is the cheapest airport to fly into from Seattle. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Seoul, which is the most popular destination in South Korea. From there, it's easy to continue on to other popular destinations such as Busan, Incheon and Jeju City.
  • If you want the shortest trip, choose the Seattle to South Korea nonstop route. If you'd rather save money, the route via Hong Kong Intl (HKG) is usually the cheapest.
  • 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 1219 reviews
8.1Food
8.7Crew
8.3Comfort
8.2Entertainment
8.5Boarding
Airline reviews

The crew was great. There was no wifi The cabin temperature got very hot Seat was uncomfortable

6.0 GoodAnonymous, Oct 2026
Read more Korean Air reviews

The crew was great. There was no wifi The cabin temperature got very hot Seat was uncomfortable

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

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

The flight was on time and very quick, as expected, but the leg room isn't great in coach seats.

I took several flights that day, this was the only flight that was absolutely freezing!! It was so cold.

Terrible experience will never fly Delta again. Delayed flight with total disorganization and inept crew who wouldn’t communicate.

Going through security a third time to get on the next flight was again utterly ridiculous and unnecessary. We were in a International secure area once again and as far as I'm concerned should not have been put through the gears for absolutely no reason. The United States can get all the information they need from the travel itinerary, there was no need to be forced out of a secure area to personally interview everyone on a connecting flight to find out their US immigration status.

Spokane airport was easy to get through. Seattle having my arrival and international departure gate so close to each other was fantastic! The waiting area though was a bit confusing about where to sit for my gate.

Spokane airport was easy to get through. Seattle having my arrival and international departure gate so close to each other was fantastic!

The airplane very small , no space for put my carry on , they tell me loads my carry on I thought they will load my carry only Seattle to San Francisco but when I get off airplane at San Francisco they just tell me load my bags from Seattle to Bangkok Why they don’t tell me before load . I told them I don’t want load my bag from Seattle to Bangkok , because my carry on had medicine. Why crew from Seattle don’t help me , they only told my go to tell luggage claim Delta

Waited a long time at JFK to board with no information being readily available.Left about 45 minutes late and it was 2:45 AM in JFK.Nothing todo. Second deck of the Airbus is more comfortable or seems that way because there is less people. Food was OK. The food on secondleg was better as we had ordered it before hand. We thought we had did that on the long first leg but we were told we did not. Cabin crew was generally nice. There are people who lean back when eating as they wait for food to be delivered and know no one will check -- drag. TV selection was awful movies OK. Comfortable all in all.

Not enough seat cushion. Butt was hurting especially on long flight. Not enough movie selection. Entertainment was outdated. Coffee served was cold. Other than that flight was good.

Humm, I should have known that the seat I peaked on my flight from Inchon to Manila was designed for a toddler or very small person.

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

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.

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 amazing. I was not expecting the phenomenal customer service Asiana provides.

The boarding process was good. The toilet could be better maintained.

It’s wonderful service aboard. Delayed for departure but arrival in Korea went so well.

Delays. Again. Haven’t had a good experience out of Seattle in most flights. The flight was delayed and passengers were all bunched in one area even after the doors closed when there were tons of empty seats. Attendants chastised passengers for wanting to move and even embarrassed one man for telling him tons of the empty seats were actually premium seating and he needed to go back to the back of the plane the seats have been getting increasingly uncomfortable and the snacks are terrible if you get one. No options for people who don’t/can’t eat sweets. Prices keep going up and amenities and service keep dropping. Air travel has become more like taking a very expensive bus.

As a deaf person I appreciate the assistance provided by the boarding staff and the flight attendants.

WiFi did not work for the flight. Crew were polite but kept asking me to move my bag even after it had been moved to the preferred position previously and not moved since. I had a winter jacket as well and they changed their minds multiple times about where I was allowed to keep it.

Good seating and leg room. Able to choose seat. Nice crew, polite and helpful. Nice snacks. Meals have to be pre ordered, short flight do no meal required.

No complaints. Nothing for entertainment, but it's a regional smaller body aircraft, not a longer range long body. Didn't partake in any snacks, mainly slept for the whole short flight. Got me to A to B as intended.

I reserved exit row as I am 6’7” and was very disappointed to find out that my seats were as crammed together as the rest of the plane. Worse actually, as the seats don’t recline. I believe I paid an additional $200 apiece. What do I get for that? I guess it’s on me that I didn’t do the research to know this in advance but I’m tired of buying airfare which used to include an actual seat on the plane and now it is an additional charge. I think the seats I purchased are sold at a premium by deception by people like me that think these are desirable. Got forbid there’s an incident and passengers have to escape through these tiny passages. Love to travel but have to reconsider future trips because of the dishonesty of your industry. Have always had good experience in the past with Alaska but now I have soured. Thank you very little, Dean Jones.

Everything was fine, flight was on time. Seats are pretty comfortable. I paid extra for the extra leg room. Did not get food. The only thing I wish Alaska had was a seat back screen rather than trying to watch things on my phone.

The flight attendants stood there talking to each other instead of welcoming people on the flight.

My bag was gate checked in Seattle and I was told it would be at the end of the walkway when I arrived in Idaho. It was not and I had to get it from baggage claim. Southwest Airlines will gate check a bag even if they have room for it in the cabin. I like that a lot. Seattle Airport is not that easy to maneuver. Indianapolis is one of the easiest airports to navigate.

Truly, everything was professional, and extremely friendly with lots of smiles from all the staff. My only complaint is that both coming and going from San Francisco to Seattle and back the public announcement system on the airplane when I was sitting in the exit row was so loud that it hurt my ears, and I was not the only one I did report it to one of the stewardesses who thanked me and apologized, but truly Alaska Airlines is my favorite domestic Airlines by a far shot

dropped my bags at Seattle Delta curbside. 1.5 hours before departure. one bag oversized made it. the other was left at curb and mishandled. poor communication from delta in sjc baggage claim. No internet on flight and food choices in business are horrible. You are forcing us to fly Alaska which is shockingly better than the Delta experience. that is a low bar.

Delta is the best. It was all very easy and on time.

Delay from Atlanta to Tampa was simply unacceptable. Multiple delays led to us landing after 3am. Worst travel experience of my life

I somehow thought my food preferences was saved to my account— everything had dairy and couldn’t eat anything.

Comfortable seats. Nice service online. Short flight, so not a lot of time to enjoy.

The flight was done by SkyWest only WIFI no entertainment center are available on the CRJ

Everything worked smoothly, never had a concern with the flight from start to finish.

My flight was delayed by 4 hours in 30 minute increments. The gate agents were amazing but the communication was not. We were told that there was a maintenance issue but they didn't know what it was. That didn't inspire confidence. Then they said they found it and it was fixed and the pilot just needed to sign off. Then the pilot needed to talk to the other pilot from the arriving flight and we'd be fine. Then we were waiting for the pilot to call back. Then the maintenance issue wasn't fixed. Then they decided we were getting a new plane (why didn't they decide this earlier??). Fine. But then they announced we were changing gates AND terminals. And we were boarding in 20 minutes. So we all had to run to the new terminal gate. We could have taken off at that time, but we then had to wait for all the people who rebooked on a different flight to book this flight again. That took 30+ minutes because there was only one gate agent. When everyone ditched this flight, I saw it as an opportunity to upgrade to comfort. Delta, the greedy jerks they are, charged me $121. After their delay, their fault, their issues, couldn't even discount an upgrade. They only handed out $12 meal vouchers for the delay. I can't even get a snack from starbucks for that.

Love me some Delta. One of the few airlines to recognize and support veterans. Easy boarding, flight was on time and arrived early and the flight attendants were excellent on this flight.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

All good……but luggage didn’t make it on the airplane. Had to wait 3 days. Was a bummer.

Small suitcase used for carryon the last time was refused by boarding crew this time. Appears to be at the discretion and mood of the person on the day. Flight was only half booked, there would have been no problem with space.

They could care less about you. Just under a 4 hour delay in Seattle, leading into a missed connection in Vancouver, which led to 2 more delays that added up to 3 more hours leaving us to have to sleep on the floor of the Toronto airport cause they don't help you find accomodations and they just book you on the next flight out. Took an additional 14 hours to get home. Always given the brush off to get rid of us. Worst airline ever

All was good with comfort and ease of boarding. There was confusion from what gate to board at. Meant moving a long distance but I allowed plenty of time for this.

Good airport. Good entertainment on the big flight. Did not have a good way to prop up or mount my phone/ipad

Air Canada at SeaTac was the best. Polite, helpful, all good!

The problem in part was with the airports, not really the fault of Air Canada. Confusing directions regarding the gate, in Seattle the recommended shuttle train entrance was not working. Simular problems in Toronto. Baggage arrived in good time. Marx Bros movie on entertainment from Seattle. I was told I was laughing too loudly, by the flight attendant. No lounge in Seattle. Lounge in Toronto excellent.

Both fights were delayed. Food could be better comparing to other international flights

I found the personal kind and caring. The Problem was not enough people to serve the the customers. The flow was restricted the crowd frustrated by the wait times. Air Canada seems to hire good people but they need backup in order to provide the service we pay for.

The Montreal to Barcelona flight was cancelled half hour before boarding. We had to struggle for hours to find an alternative route through a very long route with 6 hours of transit time in Munich. It wasted almost one full day of our long awaited vacation. We are extremely disappointed.

More options for your flight from Seattle to South Korea

Complete your trip to South Korea with a hotel stay or car rental