$408 Find Cheap Flights from South Korea to Seattle - Compare and Save

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Cheap Flights from South Korea to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from South Korea to Seattle

Mon, Dec 21 - Wed, Jan 6
Multiple Airlines Logo
6:55 pm - 9:57 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
20h 02m1 stop Vancouver Intl
Multiple Airlines Logo
10:10 am - 10:50 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
19h 40m2 stops Vancouver Intl Tokyo Narita
$847Multiple Airlines
Fri, Dec 11 - Sun, Dec 27
Air Canada Logo
6:55 pm - 2:37 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
12h 42m1 stop Vancouver Intl
Air Canada Logo
7:05 pm - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
29h 05m1 stop Vancouver Intl
$878Air Canada
Mon, Dec 21 - Wed, Jan 13
Air Canada Logo
6:55 pm - 6:22 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
16h 27m1 stop Vancouver Intl
Air Canada Logo
7:05 pm - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
29h 05m1 stop Vancouver Intl
$890Air Canada
Fri, Dec 11 - Sun, Jan 3
Korean Air Logo
9:20 pm - 2:10 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 50mnonstop
Korean Air Logo
12:40 pm - 5:45 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 05mnonstop
$910Korean Air
Fri, Dec 11 - Sun, Jan 3
Alaska Airlines Logo
8:00 pm - 12:55 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Alaska Airlines Logo
12:40 pm - 5:35 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$959Alaska Airlines
Mon, Dec 21 - Wed, Jan 13
Alaska Airlines Logo
8:00 pm - 12:55 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Alaska Airlines Logo
12:40 pm - 5:35 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$964Alaska Airlines
Wed, Feb 3 - Tue, Feb 16
Korean Air Logo
4:10 pm - 9:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Korean Air Logo
12:10 am - 5:20 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 10mnonstop
$1,003Korean Air
Fri, Dec 11 - Sun, Jan 3
Delta Logo
9:20 pm - 2:10 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 50mnonstop
Delta Logo
7:15 am - 5:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
17h 25m1 stop San Francisco
$1,008Delta
Thu, Nov 26 - Thu, Dec 3
Korean Air Logo
4:10 pm - 9:05 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Korean Air Logo
11:00 am - 3:55 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$1,008Korean Air
Tue, Nov 24 - Wed, Dec 9
Delta Logo
8:15 pm - 5:35 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
26h 20m1 stop Taipei City Taiwan Taoyuan Intl
Delta Logo
12:35 pm - 5:45 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 10mnonstop
$1,013Delta
Booking Insights

KAYAK's insights & trends for flights to Seattle

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

What is the cheapest flight to Seattle?

In the last 5 days, the cheapest flight deal to Seattle was found on the route from Incheon, at $846 return. The most popular connection is from Seoul to Seattle and KAYAK users have found round-trip deals for as low as $846 in the last 5 days.

What is the cheapest day to fly to Seattle?

Based on KAYAK data, the cheapest day to fly to Seattle is Monday where round-trip tickets can be as cheap as $825. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $1,108 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is November, where tickets cost $618 on average for return flights. On the other hand, the most expensive months are June and August, where the average cost of tickets from South Korea is $1,104 and $1,009 respectively. For one-way flights, the best month to travel is December with an average price of $595.

What is the cheapest time of day to fly to Seattle?

The cheapest time of day to fly to Seattle is generally at night, when round-trip flights cost $889 on average. The most expensive time of day to fly to Seattle is generally in the evening, which is peak travel time and where the average cost of a ticket is $1,059.

What is a good deal for flights to Seattle?

If you’re looking for cheap airfare to Seattle, 25% of our users found tickets to Seattle for the following prices or less: From Incheon Intl Airport $1,023 round-trip.

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

To get a below average price, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low season

September

Cheapest flight

$408
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly with an average 5% increase in price.
Flight from Incheon to Seattle

FAQs - booking Seattle flights

  • What is the cheapest flight to Seattle?

    In the last 5 days, the cheapest flight deal to Seattle was found on the route from Incheon, at $846 return. The most popular connection is from Seoul to Seattle and KAYAK users have found round-trip deals for as low as $846 in the last 5 days.

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    There are 11 miles between Seattle city center and Seattle/Tacoma Intl Airport.

  • What is the name of Seattle’s airport?

    When flying to Seattle, you'll arrive at Seattle/Tacoma Intl Airport (SEA). The airport is also known as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs $942. The cheapest price found on KAYAK in the last 2 weeks cost $495 and departed from Incheon Intl Airport.

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

    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 to Seattle.

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

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

    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 Seattle 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 to Seattle?

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

Top tips for finding cheap flights to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $606 or less one-way and $1,023 or less round-trip.

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top 4 airlines serving from South Korea to Seattle

 
Need help choosing which airline to fly with to Seattle? 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
8.2Entertainment
8.1Food
8.5Boarding
8.3Comfort
8.7Crew
Airline reviews

The business class is excellent. I loved the food, and the crew was very attentive and professional. From boarding to arrival, everything felt smooth and well-organised.

10.0 ExcellentFiruz, Apr 2026
Read more Korean Air reviews

The business class is excellent. I loved the food, and the crew was very attentive and professional. From boarding to arrival, everything felt smooth and well-organised.

One of the flight attendants stepped on my foot. I was on the aisle seat. A lady inside needed to get out. So Instood. Just then, a flight attentendant came wuicklybtheoughbthe aisle and stepprd on my sock covered toes. I let out a small sound. She stopped momentarily, but didn’t ask how I was just took off of the aisle. Never came back to see how I was. Fortunately, I was not really hurt other than a slight soreness in my toes. But I found that to be very negligent.

The boarding process for Korean airlines is very straightforward and easy. You've never met such helpful and friendly people. The food was great and the entertainment options were excellent too. My teenage boys found programs they wanted to watch while I had fun watching a full season of the Last Man - the Blind Investigator (Japanese), which my wife enjoyed too. My only complaint was that it takes a very long time to taxi at ICN (20 minutes) and the pilot had to hold at the gate for 10 minutes after our scheduled departure time, which meant we got to Seattle 27 minutes late. Luckily I had a long enough connection to make my next flight, but just barely.

They changed aircrafts and they moved my seats that were already prepaid. I did not get the seats I paid for, so I got expensive seats that I didn't want

I won't hesitate to fly with Korean Air again and agian....if I can get a good deal.

Will try never to fly Delta international again. Flight delayed and staff completely inept in dealing with it. Would not communicate, rude, completely disorganized. Once we reached Seoul the staff there had no idea what to do with us and led us around the airport from one pointless line to another. They were clearly not told how to manage the situation even though they had hours to make a plan. Never again.

lunch was good; breakfast was kinda meh cabin temprature was way too high new entertainment system but somewhat limited content

Going through security a second time to get on the next Korean Air flight was utterly ridiculous and unnecessary. We were in a International secure area.

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

I’m not much for Asian food. So did not eat much on the flight

Food could be better it was okay. Entertainment seems dated it was something but in this day and age could be a lot better.

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

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

Staff always with a smile and very helpful with my mom who has mobility issues.

Great service. They could offer vegetarian food and do more to reduce waste.

Very comfortable seats, delicious meals, and friendly and helpful staff

Staff was excellent. Food could use more variety. -More vegetable options. Menu didn't have juice or soda listed. -The croissants were outstanding!

Asian Vegitarian food was test less No Salt or pepper served Need to improve with Chef who can caters for Peaple from India I am sure Chef knows different varieties of food Indian People like

Airfare was ok . Food not good , seat ok but not comfortable. Lay over too long , crew was ok Overall just ok

2 things that really tanked our experience with this trip with Asiana Airline (which used to be among my favorite airlines): 1) The "random" security screening at the boarding gate is crazily thorough (which is completely redundant to the security screening before we went through the security checkpoint before getting into the gate area), and the water was acquired inside of the gate area (from a lounge operated by the Inchon airport). We were asked to take out *EVERY* single items from the carry-on luggage and open up every comtainers / bags / packages to inspect. To add to it, there were two inspection workers there (one seemed to be a trainee and the other seemed to be a trainer), and the trainer worker held a very unfriendly / arrogant attitude towards us. As the youngest member (a minor) of my family was being "screened", the rest of my family wanted to make sure that no inappropriate actions would happen to her. That trainer worker yelled at us and attempted to use rude body language (waving her hands) and facial expression to ask us to stay away. 2) The luggage handling at the destination was really *REALLY* bad. Among my 25+ years of travel experiences, I'm going to have to say that this was the worst luggage experience where we didn't lose our luggage. Our flight was scheduled to land 12:45pm, and landed around 1pm. 15mins delay in landing is absolutely normal. Deplane process took a bit longer than usual flight (we waited for around 20mins, after arriving at the gate, before people were able to actually leave the plane). However, the luggage took another *2 HOURS* to arrive at the baggage claim carousel. This is insane. What's worse is, due to the delay in luggage, the flurry of passengers from our flight collided with 3 other incoming flights. The US border / custom line was like the longest Disneyland attraction line winding through the entire arrival hall and around all the baggage claim carousels (like at least a thousand people). I've never seen anything like that at SeaTec airport (US border control), period. The luggage claim experience really tanked our trust and overall impression for Asiana Airline's Seattle airport ground operational effectiveness and efficiency. This has to change in order for them to remain relevant / in-business with increased competitions from Korean Air and other Asia-based airlines.

The back of the plane use to board first after handicap with children and first class. Now the back boards last and there’s a long line waiting to go back while everyone is putting their luggage up and standing in aisle just talking. It’s hard on the elderly. I’m elderly.

Crew was fine.at check out I didn't get my debit card back.and didn't know until I was in Seattle. There was a 5.5hour delay. I didn't get to Washington til 530this morning. So now I have to get a new card and change alot of stuff.

For the third flight I’ve taken on Alaska this year there were delays. It’s become almost a gamble and hope for the best especially catching the late flight out of Kalispel to Seattle. Don’t even get me started on the flight out of Seattle to Sacramento. I will try another airline whenever possible moving forward.

Like to get onward pass from Alaska airlines and Cathay Pacific more seamless. As the online check-in procedure you sent didn't work and I have to get to the airport really early to check-in with counter.

I was a late add on to this flight because my previously booked flight was delayed, which would have made me late for my connecting flight. I was given the last seat on the plane which isn’t a huge deal but the seat had lots of dust and black mold looking growth along the air vents, making me uncomfortable with using it for the 6 hour flight. There was a gross fecal matter looking stain on the edge of the window in front of me. I paid for the WiFi, which did not work for the most of the flight.

The flight itself was good but I am not a fan of a lot of people and so much sensory I couldn't take that part. My brain went into rescue mode cause there was to much going on. I am to interverted to out here peopling. I like the emergency section but when I feel like I am trapped cause there are people next to me I almost wanted to jump out to be honest. I didn't obviously but I now know what all I can handle and what not. Thank you for hearing me out. If there are better times for people with sensory issues and having borderline personality and anxiety issues please let me know

Alaska Airlines has great customer service. I would like the Alaska lounge to improve with food options.

No free internet, lazy flight attendants that did not like to serve drinks. Blamed it on turbulence but there was not any.

Gate agent was VERY efficient, even as his 2nd wasn't there. But... Great Landing! (I suspect he's done this before.)

Boarding was so bad in Seoul! Food was just junk!

Rude staff from baggage check to gate crew. Poor instructions. Inconsistent application of baggage rules.

more room in seats, larger snacks, more comms with delays

The plane was a rather tired 737-800, with old style small luggage bins. Poor air flow. USB charger in the infotainment system was not functioning. The flight was 2 hours late due to crew rest requirements (not their fault). On arrival in Seattle, waited on the tarmac for 30 minutes with very few updates from the crew.

One of the restrooms didn’t work. The ones that did never got replenished. Flight attendant just sitting there on their phone. No notification that the bathroom was broken so long lines. Apathetic crew.

I am in a wheelchair The gate agent knew exactly how to boarding A wheelchair first also the flight attendant knew exactly what she was doing

They did everything right and everything happened right on time.

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

Check in process was terrible. Lady at counter didn’t know what she was doing

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