$349 Find Cheap Flights from Seoul Incheon Airport to Washington

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Incheon Intl to Washington departing on 6/2. 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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KAYAK searches hundreds of travel sites at once for deals on flights to Washington

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Washington.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Washington.
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Flights Deals

Best Washington Flight Deals from Incheon Intl

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Seattle
Seattlenonstop$451
Spokane
Spokane1 stop$784
Portland
Portland2 stops$512
Seattle
Seattlenonstop$451
Spokane
Spokane1 stop$784
Portland
Portland2 stops$512

Cheap Flight Deals from Incheon Intl to Washington (ICN-USWA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Incheon Intl to Washington 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.

Recent round-trip flight deals from Incheon Intl to Washington

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Incheon Intl to Washington.
Discover the best prices for you by selecting your travel dates on KAYAK.
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$451Asiana Airlines
Find Deal
Mon, May 12 - Thu, May 29
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$452Asiana Airlines
Find Deal
Tue, May 13 - Sun, Jun 1
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
Korean Air Logo
1:20 pm - 4:40 pmSEA-ICN
11h 20mnonstop
$454Korean Air
Find Deal
Fri, May 30 - Mon, Jun 2
Korean Air Logo
4:40 pm - 10:40 amICN-SEA
10h 00mnonstop
Korean Air Logo
1:20 pm - 4:40 pmSEA-ICN
11h 20mnonstop
$455Korean Air
Find Deal
Mon, May 12 - Thu, Jun 5
United Airlines Logo
4:50 pm - 4:47 pmICN-SEA
15h 57m1 stop
United Airlines Logo
6:45 am - 4:20 amSEA-ICN
29h 35m2 stops
$483United Airlines
Find Deal
Tue, Jun 3 - Sat, Jun 28
United Airlines Logo
11:30 am - 9:02 pmICN-SEA
25h 32m2 stops
United Airlines Logo
5:40 pm - 3:00 pmSEA-ICN
29h 20m1 stop
$485United Airlines
Find Deal
Sat, May 10 - Wed, May 14
Delta Logo
9:00 pm - 8:50 amICN-SEA
27h 50m1 stop
Delta Logo
12:50 pm - 4:40 pmSEA-ICN
11h 50mnonstop
$555Delta
Find Deal
Tue, May 13 - Fri, May 16
Delta Logo
4:00 pm - 4:08 pmICN-SEA
16h 08m1 stop
Delta Logo
12:50 pm - 4:40 pmSEA-ICN
11h 50mnonstop
$557Delta
Find Deal
Wed, May 14 - Tue, May 20
Air Canada Logo
5:45 pm - 2:16 pmICN-SEA
12h 31m1 stop
Air Canada Logo
10:00 am - 4:05 pmSEA-ICN
14h 05m1 stop
$573Air Canada
Find Deal
Thu, Sep 11 - Thu, Sep 18
Air Canada Logo
5:45 pm - 2:16 pmICN-SEA
12h 31m1 stop
Air Canada Logo
10:00 am - 4:05 pmSEA-ICN
14h 05m1 stop
$574Air Canada
Find Deal
Tue, Sep 9 - Tue, Sep 16
Useful Info

KAYAK's insights & trends for Incheon Intl to Washington flights

Get data-powered insights and trends into flights from Incheon Intl to Washington to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest Incheon Intl Airport to Washington flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Incheon Intl Airport to Washington.

The cheapest ticket to Washington from Incheon Intl Airport found in the last 72 hours was to Seattle, at $470 round-trip. The most popular route is from Incheon Intl Airport (ICN) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $470.

Can I save money by flying with a layover from Incheon Intl Airport to Washington?

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 $1,250 on average.

What is the cheapest month to fly from Incheon Intl Airport to Washington?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Incheon Intl Airport to Washington, 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 Incheon Intl Airport to Washington is April, when tickets cost $673 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $1,441 and $1,280 respectively.

What’s the cheapest day of the week to fly from Seoul Incheon Airport to Washington?

The average price of all round-trip flights from Incheon Intl Airport to Washington clicked on KAYAK for each day over the last 12 months.

When flying from Seoul Incheon Airport to Washington, you should consider leaving on a Tuesday and avoid Sundays if you are looking for the best rates. For your return to Seoul Incheon Airport, you’ll find the best rates on Mondays and the most expensive ones on Fridays.

How far in advance should I book a flight from Incheon Intl Airport to Washington?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Incheon Intl Airport to Washington, 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 Incheon Intl Airport to Washington, you should book around 5 weeks before departure. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.


Good to know

Low seasonFebruary
High seasonSeptember
Cheapest flight$349
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Incheon to Seattle

Flights from Incheon Intl to Washington: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Incheon Intl to Washington 
Verified travelerFlew with Asiana AirlinesICN-SEAMar 2025
Be careful to allow enough time when going thru Customs & Immigration. Despite having Global entry privileges, we missed our connecting domestic flight because luggages arrived late before we got thru Customs. Then, we have to contend with long security lines in SEA.
Verified travelerFlew with Asiana AirlinesICN-SEANov 2024
Asiana was great but their app is not the easiest to use.
RalphFlew with Asiana AirlinesICN-SEAApr 2024
Would have been nice to be able to book an extra bag ahead of time.
AnantFlew with Asiana AirlinesICN-SEAApr 2024
Flight is good with Crew members But certainly Indian Vegitarian meal needs immediate attention from your catering team There are many Indian people flying who did not got satisfactory Indian food Appreciate if there is an immediate attention

FAQs - booking Washington flights

  • How does KAYAK find such low prices on flights from Seoul Incheon Airport to Washington?

    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 Seoul Incheon Airport to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seoul Incheon Airport to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seoul Incheon Airport to Washington 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 Seoul Incheon Airport to Washington?

    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 Seoul Incheon Airport to Washington 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 Seoul Incheon Airport to Washington?

    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 Seoul Incheon Airport to Washington 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 Washington?

    The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost $1,021 on average. Morning departures are around 4% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally at night, which is peak travel time and where the average cost of a ticket is $1,254.

Top tips for finding cheap flights to Washington

  • Looking for a cheap flight? 25% of our users found tickets from Seoul Incheon Airport to the following destinations at these prices or less: Seattle $585 one-way - $662 round-trip

Top 5 airlines serving from Incheon Intl to Washington

 
See real verified KAYAK customer reviews for airlines flying from Incheon to Washington. 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 Incheon Intl to Washington? 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 1068 reviews
8.5Boarding
8.2Entertainment
8.7Crew
8.3Comfort
8.1Food
Airline reviews

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

8.0 ExcellentEdward, Apr 2025ICN - LAS
Read more Korean Air reviews

It's good overall. Flight was packed. Inflight entertainment choices were lacking.

They were very accommodating of a dietary issue. Nice movie & tv selections. Non-stop helped get through a very long (15 hr) flight

They did an excellent job helping me with a wheelchair. I couldn’t have asked for any better help.

Great except for the delay in Korea. Korean Air did a great job setting up a hotel for the night. I also needed assistance with a wheelchair and they were outstanding.

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

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.

Best service I’ve ever had Flight attendants are nicely dressed and look very professional

Just a typical domestic poor flight nothing more. There is no food choices in such a flight. Crew doesn't really care if you are on-board or not

My second flight wasn't better than the first one. And this is 14 hours trip, crew came out only to offer food and the choices was poor. This food choices are good for Asian people but not for westerners. The breakfast kind thing was a corn sausage really disgusting. The air-conditioned blower really blow high and cold, turn out on my arrival to feel seek, that makes the trip uncomfortable. The crew didn't not really come out during the trip to offer drinks or snacks. No fruits available. Very poor service

Our seat row plus one ahead and behind we're completely overlooked during beverage service...

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

It was all perfect and very pleasant for such long flights

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Two meals were served on this flight; one was a repeat of the meal I had had on the flight immediately preceding this one, which was bad enough I didn't even try it. Drinks were very limited. All I wanted was water, and on a 10.5 hour flight, I was given 3 cups of about 3 ounces each.

The seats felt very small. We were supplied with pillows and blankets, which was nice. Lots of noise from the bathroom, plus exterior noise. Made it hard to hear the entertainment system, even using my own noise-cancelling headphones. The food was really bad. I generally request a vegetarian meal and one was supplied, but the pasta was cold and hard and there was nothing pleasant about it. Drinks were very limited. All I wanted was water, and on a 4 hour flight, I was given 2 cups of about 3 ounces each.

We took business class, It was comfortable and I was able to sleep.

For the most part, it was an enjoyable experience. It's the 2nd half of the journey was a bit uncomfortable. It was on a noticable smaller plane compared to the previous one.

Only process that my luggage didn’t make it to my destination because of short connection but I understand

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

This has been the worst experience I've ever had. We arrived to Ho Chi Minh Airport and were supposed to get our Asiana ticket from the transfer counter as we came with a different airline. However, the staff at the transfer counter were not helpful and kept giving us different information. We were first told by Asiana airlines staff we had to wait 2 hours so they could print out and give us our tickets, then someone else told us we had to wait 3hrs, someone told us "I don't know, just go sit and wait and we will tell you later." This was at a place in the Ho Chi Minh airport that had no coffee or food shops, nothing, just immigration (to enter Vietnam with a Vietnam Visa) and security (to transfer into the gates) but we needed our printed boarding pass to go through. It wasn't until we demanded to speak to a supervisor as our flight time was 1hr away because they kept telling us "there's alot of time left for your international flight, we will get your tickets later" we still had to wait around 20minutes for the "Supervisor" to give us our tickets. I would NOT recommend Asiana Airlines, especially if going thru Ho Chi Minh Airport as they are not helpful. (We almost missed our flight, due to their lazyness and incompetence of printing our tickets) I would suggest Asiana Airlines to have a Machine in the transfer area so passengers can easily print out their boarding passes themselves and save some money by not hiring incompetent staff that can't do a simple task such as printing a boarding pass.

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

Fine except the person next to me took up her seat had raised the arm divide so she spilled into my seat. because of her size. Fortunately no one was in the seat on my right so I could use part of it.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Delta is a cut above the others in customer service.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Paid $35 and not able to access the internet at all.

Several delays. Next flight was worse. Did not arrive home until 2am PT

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

First world problems, but still… We were seated in first class and asked for a cocktail on a very short, 50 minute flight. After our drink order was taken, a half hour went by, and we noticed that every other person in the small plane had been served except for us. We got up to ask about it, the drinks finally came, then were taken away three minutes later since the flight was so short. Really strange situation, on the other hand, we were in Utah.

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Flight was delayed bc of mechanical issue. New plane had different configuration so some seats had to be switched. They called all passengers who needed new boarding cards. They did not call us so we thought our seats were the same and fine. When we boarded they informed us our receipts had changed and we are now all sitting separate and in the back row. Both my daughters had meltdowns and started to cry and once we got on the flight, we figured out how we could sit closer to each other, but this was very upsetting.

Took off on time and successfully avoided weather that looked to be a problem along the way

My flight got delayed 5 times and then got cancelled eventually, I had to get a hotel and uber and pay for food for an extra night without any plans. It was a horrible experience, instead of Air Canada, I was flying with United .

I had a nice flight with free wifi. So I was able to message family members and stream music during my flight, which made the trip go by fast. I also enjoyed flying on there Airbus A220. The plane looked very new and it also got up to speed fast down the runway and didn't need much runway to get airborne.

Short flight so no food or entertainment. Good landing at SFO and on time. We were told no carryon luggage yet lots of people were puting bags in overhead compartments. The rules need to be made more clear. I was on the first leg of an international flight and this is the first time I could not have carryon luggage.

My flight was overbooked and they would not let me board. I had to book another flight and pay the full amount of that flight. I did not get any help at all from Air Canada or United Airlines.

Comfortable seats and movies entertainment available. Better experience than the flight from Toronto to Denver.

Overall good experience. The flight from Toronto to Denver does not have entertainment - movies to watch.

Very nice. Cabin crew is very attentive and professional. So nice!

There is not enough space between two chairs and raws.

Not allowing food choice through app. Very hard to find,

Everything was made rather simple, so I appreciate that. All the people I dealt with from entering the airport in Jacksonville to my lonnnnnnng walk to my next gate in Chicago were excellent and very helpful.

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