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Cheap flights from Seoul to Washington from $392

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to Washington departing on 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seoul to Washington

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:35 pm - 1:40 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 05mnonstop
Alaska Airlines Logo
1:35 pm - 5:30 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$686Alaska Airlines
Thu, Sep 10 - Thu, Sep 24
United Airlines Logo
4:50 pm - 6:29 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
17h 39m1 stop San Francisco
United Airlines Logo
7:11 am - 3:00 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
15h 49m1 stop San Francisco
$693United Airlines
Tue, Sep 8 - Thu, Sep 17
United Airlines Logo
4:50 pm - 4:14 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
15h 24m1 stop San Francisco
United Airlines Logo
1:16 pm - 4:20 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
23h 04m1 stop San Francisco
$693United Airlines
Thu, Sep 10 - Thu, Sep 17
Alaska Airlines Logo
7:35 pm - 1:40 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 05mnonstop
Alaska Airlines Logo
1:35 pm - 5:30 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 55mnonstop
$713Alaska Airlines
Fri, Sep 11 - Sun, Sep 27
Air Canada Logo
5:45 pm - 9:52 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
32h 07m1 stop Vancouver Intl
Air Canada Logo
3:00 pm - 4:05 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
33h 05m1 stop Vancouver Intl
$730Air Canada
Wed, Oct 7 - Thu, Oct 22
Air Canada Logo
5:45 pm - 9:52 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
32h 07m1 stop Vancouver Intl
Air Canada Logo
3:00 pm - 4:05 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
33h 05m1 stop Vancouver Intl
$730Air Canada
Wed, Oct 7 - Thu, Oct 22
Asiana Airlines Logo
9:00 pm - 1:55 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 5:20 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 10mnonstop
$766Asiana Airlines
Thu, Nov 5 - Tue, Jan 26
Asiana Airlines Logo
9:20 pm - 3:15 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
9h 55mnonstop
Asiana Airlines Logo
12:10 am - 4:30 amSEA  Seattle/Tacoma Intl-ICN Incheon Intl
12h 20mnonstop
$766Asiana Airlines
Tue, Oct 6 - Mon, Oct 12
Korean Air Logo
4:40 pm - 10:40 amICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 00mnonstop
Korean Air Logo
12:50 pm - 4:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 50mnonstop
$789Korean Air
Thu, Sep 24 - Thu, Oct 1
Korean Air Logo
7:00 pm - 1:14 pmICN  Incheon Intl-SEA Seattle/Tacoma Intl
10h 14mnonstop
Korean Air Logo
12:50 pm - 4:40 pmSEA  Seattle/Tacoma Intl-ICN Incheon Intl
11h 50mnonstop
$810Korean Air
Wed, Oct 7 - Thu, Oct 22

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Alaska Airlines flights from Seoul to State of Washington

Our best Alaska Airlines deals on Seoul to State of Washington flight tickets
Alaska Airlines
Sep 10
ICN7:35 pmIncheon Intl
10h 05m
SEA1:40 pmSeattle/Tacoma Intl
Sep 24
SEA1:35 pmSeattle/Tacoma Intl
11h 55m
ICN5:30 pmIncheon Intl
$686
Alaska Airlines
Sep 11
ICN7:35 pmIncheon Intl
10h 05m
SEA1:40 pmSeattle/Tacoma Intl
Sep 27
SEA1:35 pmSeattle/Tacoma Intl
11h 55m
ICN5:30 pmIncheon Intl
$713
Alaska Airlines
Sep 11
ICN7:35 pmIncheon Intl
10h 05m
SEA1:40 pmSeattle/Tacoma Intl
Sep 23
SEA1:35 pmSeattle/Tacoma Intl
11h 55m
ICN5:30 pmIncheon Intl
$717

United Airlines flights from Seoul to State of Washington

Our best United Airlines deals on Seoul to State of Washington flight tickets
United Airlines
Sep 9
ICN11:30 amIncheon Intl
15h 51m
1 stop
SEA11:21 amSeattle/Tacoma Intl
Sep 13
SEA5:20 pmSeattle/Tacoma Intl
29h 40m
1 stop
ICN3:00 pmIncheon Intl
$693
United Airlines
Sep 15
ICN4:50 pmIncheon Intl
19h 53m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Nov 15
SEA5:23 pmSeattle/Tacoma Intl
19h 17m
1 stop
ICN5:40 amIncheon Intl
$694
United Airlines
Nov 3
ICN12:45 pmIncheon Intl
16h 35m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
Jan 26
SEA1:16 pmSeattle/Tacoma Intl
23h 24m
1 stop
ICN5:40 amIncheon Intl
$695

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to State of Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 13, 2026.
Use the filters below to find and compare flights from Seoul to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 9/10

7:35 pm-1:40 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Thu 9/24

1:35 pm-5:30 pm

Nonstop11h 55m

$686

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Tue 9/8

4:50 pm-6:29 pm

1 stop17h 39m

Seattle/Tacoma Intl

Thu 9/17

7:11 am-3:00 pm

1 stop15h 49m

$693

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 9/10

4:50 pm-4:14 pm

1 stop15h 24m

Seattle/Tacoma Intl

Thu 9/17

1:16 pm-4:20 am

1 stop23h 04m

$693

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Fri 9/11

7:35 pm-1:40 pm

Nonstop10h 05m

Seattle/Tacoma Intl

Sun 9/27

1:35 pm-5:30 pm

Nonstop11h 55m

$713

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Wed 10/7

5:45 pm-9:52 am

1 stop32h 07m

Seattle/Tacoma Intl

Thu 10/22

3:00 pm-4:05 pm

1 stop33h 05m

$730

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Wed 10/7

5:45 pm-9:52 am

1 stop32h 07m

Seattle/Tacoma Intl

Thu 10/22

3:00 pm-4:05 pm

1 stop33h 05m

$730

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 11/5

9:00 pm-1:55 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Tue 1/26

12:10 am-5:20 am

Nonstop12h 10m

$766

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Tue 10/6

9:20 pm-3:15 pm

Nonstop9h 55m

Seattle/Tacoma Intl

Mon 10/12

12:10 am-4:30 am

Nonstop12h 20m

$766
Quickest round-trip

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Thu 9/24

4:40 pm-10:40 am

Nonstop10h 00m

Seattle/Tacoma Intl

Thu 10/1

12:50 pm-4:40 pm

Nonstop11h 50m

$789

IncheonSeattle

ICN Incheon Intl - SEA Seattle/Tacoma Intl

ICNSEA

Incheon Intl

Wed 10/7

7:00 pm-1:14 pm

Nonstop10h 14m

Seattle/Tacoma Intl

Thu 10/22

12:50 pm-4:40 pm

Nonstop11h 50m

$810

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington from

How to get the cheapest flight ticket from Seoul to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to State of Washington?

The month of November is, on average, the cheapest month to fly to State of Washington from Seoul, with most prices found around $555. If you aren’t able to travel to State of Washington during the month of November, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $602.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Seoul to State of Washington is on a Monday. Travelers who choose to depart for State of Washington on a Monday will often find tickets for as low as $718. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seoul to State of Washington for around $905.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $760. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $782 on average. Flights to State of Washington from Seoul in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Seoul to Washington flight route?

Fly from Incheon Intl to Seattle/Tacoma Intl for the best Seoul - Washington flight prices

How far in advance should I book a flight from Seoul to Washington?

You are more likely to see cheaper flights to State of Washington from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $771 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Seoul for as low as $604 on momondo.

What cabin class options are available on Seoul to State of Washington flights?

There are 3 cabin classes available to choose from on Seoul to State of Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seoul to State of Washington flights?

You could potentially save up to 1% on your flight if you consider stops on a Seoul to State of Washington flight.

Cheap Seoul to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seoul to State of Washington

Best Price Found

$811

Fastest flight time

9h 50m

Direct flights

Every day

Airports in State of Washington

96 airports
The best one-way flight to State of Washington from Seoul in the past 72 hours is $811. The best round-trip flight deal from Seoul to State of Washington found on momondo in the last 72 hours is $881.
The fastest flight from Seoul to State of Washington takes 9h 50m
Direct flights go from Seoul to State of Washington every day.
There are 96 airports in State of Washington. From Seoul there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Seoul to Washington

  • When did momondo last update prices for flights from Seoul to Washington?

    Prices for flights from Seoul to Washington were last updated today.

  • How many operators does momondo search for flights from Seoul to Washington?

  • How old do you have to be to fly from Seoul to Washington?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seoul to Washington.

  • What documentation or ID do you need to fly to Washington?

    The necessary travel and health documents for your Washington trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seoul to State of Washington?

Best airlines flying from Seoul to State of Washington

Compare and see reviews for airlines that fly from Seoul to State of Washington with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $351Free CancellationRating
7.8
2,817 reviews
Search Hawaiian Airlines flights
Korean AirPriceFrom $449Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
Air CanadaPriceFrom $472Free CancellationRating
7.1
11,469 reviews
Search Air Canada flights
Alaska AirlinesPriceFrom $476Free CancellationRating
7.9
12,804 reviews
Search Alaska Airlines flights
DeltaPriceFrom $484Free CancellationRating
7.8
8,504 reviews
Search Delta flights
Asiana AirlinesPriceFrom $511Free CancellationRating
8.1
556 reviews
Search Asiana Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seoul to Washington?

It is quick and easy to find Seoul to Washington flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington that suits you.

Can I find flights from Seoul to Washington with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Washington from Seoul with this policy.

How can momondo help me find flights from Seoul to Washington?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seoul to Washington.

I’m not ready to book a flight from Seoul to Washington right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seoul to Washington now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington and let you know when they change.

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