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Cheap flights from South Korea to Seattle from $350

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from South Korea to Seattle departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from South Korea to Seattle

Recent round-trip flight deals from South Korea to Seattle

Alaska Airlines Logo
8:35 pm - 2:45 pmICN-SEA
10h 10mnonstop
Alaska Airlines Logo
9:40 pm - 7:00 pmSEA-ICN
29h 20m2 stops
$460Alaska Airlines
Find Deal
Sat, Sep 13 - Fri, Sep 26
Alaska Airlines Logo
8:35 pm - 2:45 pmICN-SEA
10h 10mnonstop
Alaska Airlines Logo
5:05 pm - 7:00 pmSEA-ICN
33h 55m2 stops
$488Alaska Airlines
Find Deal
Fri, Sep 19 - Fri, Sep 26
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$518Asiana Airlines
Find Deal
Tue, Sep 9 - Thu, Sep 18
Asiana Airlines Logo
6:20 pm - 12:30 pmICN-SEA
10h 10mnonstop
Asiana Airlines Logo
2:15 pm - 5:55 pmSEA-ICN
11h 40mnonstop
$560Asiana Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
United Airlines Logo
11:30 am - 10:15 pmICN-SEA
26h 45m2 stops
United Airlines Logo
6:35 am - 4:20 amSEA-ICN
29h 45m2 stops
$561United Airlines
Find Deal
Tue, Sep 16 - Thu, Sep 25
United Airlines Logo
11:45 am - 9:33 pmICN-SEA
25h 48m3 stops
United Airlines Logo
12:41 pm - 4:40 amSEA-ICN
23h 59m2 stops
$562United Airlines
Find Deal
Tue, Oct 28 - Thu, Oct 30
Korean Air Logo
7:00 am - 9:00 amPUS-SEA
19h 00m1 stop
Korean Air Logo
11:30 am - 8:45 pmSEA-PUS
16h 15m1 stop
$712Korean Air
Find Deal
Fri, Dec 19 - Wed, Dec 31
Delta Logo
4:10 pm - 1:20 pmPUS-SEA
14h 10m1 stop
Delta Logo
11:00 am - 7:25 pmSEA-PUS
15h 25m1 stop
$763Delta
Find Deal
Sun, Dec 21 - Wed, Dec 31
Korean Air Logo
10:25 am - 1:20 pmPUS-SEA
19h 55m1 stop
Korean Air Logo
11:00 am - 7:25 pmSEA-PUS
15h 25m1 stop
$765Korean Air
Find Deal
Sun, Dec 21 - Wed, Dec 31
Delta Logo
10:40 am - 1:40 pmPUS-SEA
19h 00m1 stop
Delta Logo
12:35 pm - 8:45 pmSEA-PUS
16h 10m1 stop
$766Delta
Find Deal
Wed, Sep 17 - Wed, Sep 24

Delta flights from South Korea to Seattle

Our best Delta deals on South Korea to Seattle flight tickets
Delta
Dec 21
PUS4:10 pmBusan Gimhae
14h 10m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
Dec 31
SEA11:00 amSeattle/Tacoma Intl
15h 25m
1 stop
PUS7:25 pmBusan Gimhae
$763
Find similar
Delta
Sep 17
PUS10:40 amBusan Gimhae
19h 00m
1 stop
SEA1:40 pmSeattle/Tacoma Intl
Sep 24
SEA12:35 pmSeattle/Tacoma Intl
16h 10m
1 stop
PUS8:45 pmBusan Gimhae
$766
Find similar
Delta
Dec 20
PUS7:00 amBusan Gimhae
19h 00m
1 stop
SEA9:00 amSeattle/Tacoma Intl
Dec 31
SEA7:20 amSeattle/Tacoma Intl
20h 25m
2 stops
PUS8:45 pmBusan Gimhae
$767
Find similar

Alaska Airlines flights from South Korea to Seattle

Our best Alaska Airlines deals on South Korea to Seattle flight tickets
Alaska Airlines
Sep 13
ICN8:35 pmIncheon Intl
10h 10m
SEA2:45 pmSeattle/Tacoma Intl
Sep 26
SEA9:40 pmSeattle/Tacoma Intl
29h 20m
2 stops
ICN7:00 pmIncheon Intl
$460
Find similar
Alaska Airlines
Sep 19
ICN8:35 pmIncheon Intl
10h 10m
SEA2:45 pmSeattle/Tacoma Intl
Sep 26
SEA5:05 pmSeattle/Tacoma Intl
33h 55m
2 stops
ICN7:00 pmIncheon Intl
$488
Find similar
Alaska Airlines
Oct 6
ICN8:35 pmIncheon Intl
10h 00m
SEA2:35 pmSeattle/Tacoma Intl
Nov 5
SEA9:15 pmSeattle/Tacoma Intl
29h 10m
2 stops
ICN7:25 pmIncheon Intl
$490
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from South Korea to Seattle 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 5, 2025.
Use the filters below to find and compare flights from South Korea to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 9/13

8:35 pm-2:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Fri 9/26

9:40 pm-7:00 pm

2 stops29h 20m

$460

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Fri 9/19

8:35 pm-2:45 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Fri 9/26

5:05 pm-7:00 pm

2 stops33h 55m

$488

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 9/9

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Thu 9/18

2:15 pm-5:55 pm

Nonstop11h 40m

$518

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Sat 9/20

6:20 pm-12:30 pm

Nonstop10h 10m

Seattle/Tacoma Intl

Sat 9/27

2:15 pm-5:55 pm

Nonstop11h 40m

$560

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 9/16

11:30 am-10:15 pm

2 stops26h 45m

Seattle/Tacoma Intl

Thu 9/25

6:35 am-4:20 am

2 stops29h 45m

$561

IncheonSeattle

ICN - SEA

ICNSEA

Incheon Intl

Tue 10/28

11:45 am-9:33 pm

3 stops25h 48m

Seattle/Tacoma Intl

Thu 10/30

12:41 pm-4:40 am

2 stops23h 59m

$562

BusanSeattle

PUS - SEA

PUSSEA

Busan Gimhae

Fri 12/19

7:00 am-9:00 am

1 stop19h 00m

Seattle/Tacoma Intl

Wed 12/31

11:30 am-8:45 pm

1 stop16h 15m

$712

BusanSeattle

PUS - SEA

PUSSEA

Busan Gimhae

Sun 12/21

4:10 pm-1:20 pm

1 stop14h 10m

Seattle/Tacoma Intl

Wed 12/31

11:00 am-7:25 pm

1 stop15h 25m

$763

BusanSeattle

PUS - SEA

PUSSEA

Busan Gimhae

Sun 12/21

10:25 am-1:20 pm

1 stop19h 55m

Seattle/Tacoma Intl

Wed 12/31

11:00 am-7:25 pm

1 stop15h 25m

$765

BusanSeattle

PUS - SEA

PUSSEA

Busan Gimhae

Wed 9/17

10:40 am-1:40 pm

1 stop19h 00m

Seattle/Tacoma Intl

Wed 9/24

12:35 pm-8:45 pm

1 stop16h 10m

$766

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 Seattle from

How to get the cheapest flight ticket from South Korea to Seattle

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 Seattle?

In general, June is the cheapest month to fly from South Korea to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $660. If you don’t want to visit Seattle in June, then you should wait until May to fly from South Korea, when ticket prices are also cheap, with an average price of $665.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from South Korea is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $824. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from South Korea because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,049.

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

Flying to Seattle from South Korea in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $853 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $999. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest South Korea to Seattle/Tacoma Intl flight route?

Fly from Incheon Intl to Seattle/Tacoma Intl for the best South Korea - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from South Korea when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $812 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from South Korea for as low as $697 on momondo.

What cabin class options are available on South Korea to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on South Korea to Seattle/Tacoma Intl 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 South Korea to Seattle flights?

You could potentially save up to 42% on your flight if you consider stops on a South Korea to Seattle flight.

Cheap South Korea to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from South Korea to Seattle

Best Price Found

$350

Fastest flight time

9h 55m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from South Korea in the past 72 hours is $350. The best round-trip flight deal from South Korea to Seattle found on momondo in the last 72 hours is $460.
The fastest flight from South Korea to Seattle takes 9h 55m
Direct flights go from South Korea to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • When did momondo last update prices for flights from South Korea to Seattle/Tacoma Intl Airport?

    Prices for flights from South Korea to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from South Korea to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from South Korea to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Korea to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from South Korea to Seattle?

Best airlines flying from South Korea to Seattle

Compare and see reviews for airlines that fly from South Korea to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $474Free CancellationRating
7.1
9,890 reviews
Search Air Canada flights
Korean AirPriceFrom $515Free CancellationRating
8.4
1,122 reviews
Search Korean Air flights
United AirlinesPriceFrom $516Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
Asiana AirlinesPriceFrom $535Free CancellationRating
8.2
470 reviews
Search Asiana Airlines flights
DeltaPriceFrom $638Free CancellationRating
8.0
7,985 reviews
Search Delta flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Leavenworth
Tacoma
SeaTac
Ocean Shores
Olympia
Renton
Kent
Federal Way
Lynnwood
Puyallup
Marysville
Tukwila
Kirkland
Lakewood
Fife
Cle Elum
Shoreline
Centralia
Westport
Redmond

Why use momondo?

Why should I use momondo to find a flight deal from South Korea to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from South Korea to Seattle. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from South Korea to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from South Korea with this policy.

How can momondo help me find flights from South Korea to Seattle?

momondo helps you find the best flight between South Korea and Seattle by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from South Korea and alert you when they change.

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