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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

Thu, Oct 1 - Thu, Oct 29
Alaska Airlines Logo
7:35 pm - 1:40 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 05mnonstop
Alaska Airlines Logo
1:40 pm - 5:35 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$722Alaska Airlines
Mon, Dec 14 - Sun, Jan 10
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
$722Alaska Airlines
Wed, Feb 17 - Wed, Apr 14
Philippine Airlines Logo
7:30 am - 6:45 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
28h 15m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
11:55 pm - 7:15 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
27h 20m1 stop Manila Ninoy Aquino Intl
$842Philippine Airlines
Tue, Oct 13 - Tue, Oct 20
Philippine Airlines Logo
7:20 am - 8:05 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
28h 45m1 stop Manila Ninoy Aquino Intl
Philippine Airlines Logo
11:10 pm - 7:15 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
28h 05m1 stop Manila Ninoy Aquino Intl
$856Philippine Airlines
Tue, Oct 6 - Tue, Nov 10
Air Canada Logo
5:45 pm - 2:22 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
12h 37m1 stop Vancouver Intl
Air Canada Logo
8:40 am - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
15h 30m1 stop Vancouver Intl
$896Air Canada
Mon, Oct 26 - Mon, Nov 2
Air Canada Logo
5:55 pm - 9:57 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
20h 02m1 stop Vancouver Intl
Air Canada Logo
8:40 am - 5:10 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
15h 30m1 stop Vancouver Intl
$896Air Canada
Wed, Oct 28 - Wed, Nov 4
Korean Air Logo
4:10 pm - 10:05 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
$995Korean Air
Thu, Oct 8 - Wed, Oct 28
Korean Air Logo
4:40 pm - 10:40 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 00mnonstop
Korean Air Logo
12:00 pm - 3:55 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$997Korean Air
Wed, Sep 30 - Mon, Oct 12
Delta Logo
8:35 pm - 6:00 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
25h 25m1 stop Taipei City Taiwan Taoyuan Intl
Delta Logo
3:35 pm - 11:15 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
27h 40m1 stop Taipei City Taiwan Taoyuan Intl
$1,001Delta
Thu, Oct 1 - Mon, Oct 12
Delta Logo
12:35 pm - 6:00 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
33h 25m1 stop Taipei City Taiwan Taoyuan Intl
Delta Logo
3:35 pm - 11:15 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
27h 40m1 stop Taipei City Taiwan Taoyuan Intl
$1,001Delta
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 $722 return. The most popular connection is from Seoul to Seattle and KAYAK users have found round-trip deals for as low as $722 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 $730. On the other hand, the most expensive day to fly is Wednesday, where round-trip prices are $938 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is November, where tickets cost $558 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 October with an average price of $490.

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

The cheapest time of day to fly to Seattle is generally in the evening, when round-trip flights cost $788 on average. The most expensive time of day to fly to Seattle is generally at night, which is peak travel time and where the average cost of a ticket is $815.

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 $869 round-trip.

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

To get a below average price, you should book around 3 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Good to know

Low season

February

Cheapest flight

$488
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 8% 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 $722 return. The most popular connection is from Seoul to Seattle and KAYAK users have found round-trip deals for as low as $722 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 $851. The cheapest price found on KAYAK in the last 2 weeks cost $436 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 $662 or less one-way and $869 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 5 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 1220 reviews
8.7Crew
8.3Comfort
8.1Food
8.2Entertainment
8.5Boarding
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.

Best flights I e been on. Need gluten free snacks

I cancelled this flight over a week ago, due to being in the hospital! Yet when I finally recovered and got out of the hospital I saw no one ever cancelled it and I was fully charged???

I was assured by the phone rep weeks ago this had been cancelled!!

This was the best flight I’ve ever been on- solely for the purpose that our pilot gave us a tour of the west coast. He didn’t need to do that but he did and it made the experience spectacular. Well done.

Apparently you could not have food unless you ordered ahead. This was not obvious ahead of time. What we saw given to others on the plane also appeared too be quite meager.

Seat didn’t recline at all- very uncomfortable after three hours

In flight service flight attendants did wonderful job.Airlines could have done better with snacks,since it was early morning flight breakfast places where not open so people could not grab anything quick for breakfast.I hope they would keep that in mind.

Be able to buy food while on the plane, not just in advance. Should be able to watch TV on entertainment screens on backs of chairs

I paid extra to choose a seat. When arriving at the gate after a very stressful check in at the airport, realized did not get the chosen seat that I PAID for. When I called the airline I was told I did not pay to choose a seat and could not be refunded, but I DID pay extra to choose a seat. And of course, got stuck in a MIDDLE seat. Since the seats are now crammed together, this is especially uncomfortable. The check in for baggage was ridiculous, it was a mile long and the kiosk to check in for the flight was very confusing. We finally sought out help and a very rude representative quickly went through the kiosk and printed a boarding pass that did not provide the PAID for chosen seat. Didn't get to get on the return flight because the flight coming in was delayed several hours, missed the flight by 3 minutes!!!!!!! You really can't hold the door for 3 minutes for a passenger you KNOW you are waiting for??? What stress and had to wait 4 MORE HOURS to get a flight home because you could not keep the door open 3 minutes. 3 minutes. Had only 20 minutes to get from flight to connecting flight and was accused of taking too long to get from gate to gate in Chicago. Flights were delayed all day long coming in and going out, you would think you could wait 3 minutes to allow passengers to get to the connecting flights. HUGE inconvenience, stressful and makes for a really LONG day when the flight leaving Des Moines to Chicago was horribly delayed, already had a horrible experience and missed the connecting flight by 3 minutes. 3 minutes. Airplane was still there, the door closed, why on earth is it such a huge deal to wait a few minutes when flights were already delayed ALL DAY LONG and why is it such a huge deal to REOPEN the door to let another passenger on??!! I used to like Alaska Airlines. I just plain hate flying in general now. The airlines have 0 (zero)care about the people buying tickets and making travel plans and how stressful flying is now. Zero care.

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

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.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

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

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

Delayed and cancelled flights were hard and very stressful, both ways!

The flight was CANCELED!!! Can’t get much more “poor” than that. I had to switch to American Airlines, add another layover and got home in Honolulu 4 hours later than I was supposed to be home. One bright spot was Josh with Alaska Airlines at SFO. He got me on a United Flight that got me home a few hours before I would have. Without him I would have gotten home almost 7 hours after my originally scheduled flight.

Canceled my flight within 24 hours, causing me arriving home midnight. Will never book Hawaiian airlines anymore

The entire crew had everything handled and truly worked together. More than once, I saw them hustle down the aisle and back just to serve customers.

The flight was great. But the problem is we actually booked a flight with Hawaiian Airlines. We even received a Hawaiian Airlines confirmation number. So this made it really difficult to check in the online. So I had to call Hawaiian Airlines to get our Alaskan Airlines confirmation code to check in. Also weren’t told we were flying on Alaskan, but once we got on the plane, everything went well!

Agents talk too fast over intercom. I know it’s memorized and we’ve all heard it before. Just slow down a little. Stop charging for checked bags. I was pleased to get my bags promptly at each end of my flight.

It was clean and the crew was great. I wish the chairs could recline just a little more and you would provide small pillows for people with bad backs. My back is fused and a little support would be great.

Boarding was fine, but once on we waited for 45 minutes to take off. This caused me to almost miss my connection. Once the second flight was boarded we waited again for 20-30 minutes to take off.

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