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Cheap flights from Washington to Seoul from $442

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Seoul departing on 9/7. 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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Cheap round-trip flights

Logo
5:30 am - 10:25 pmSEA-GMP
24h 55m2 stops
Logo
8:20 am - 6:36 pmGMP-SEA
26h 16m2 stops
$806
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Mon, Sep 1 - Sat, Sep 6
Japan Airlines Logo
8:42 am - 9:50 pmSEA-GMP
21h 08m2 stops
Japan Airlines Logo
7:20 pm - 2:55 pmGMP-SEA
35h 35m2 stops
$871Japan Airlines
Find Deal
Fri, Oct 17 - Fri, Oct 24
Japan Airlines Logo
12:10 pm - 10:20 pmSEA-GMP
17h 10m1 stop
Japan Airlines Logo
7:50 am - 2:36 pmGMP-SEA
23h 46m2 stops
$873Japan Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 20
Japan Airlines Logo
1:55 pm - 10:20 pmSEA-GMP
16h 25m1 stop
Japan Airlines Logo
12:05 pm - 10:50 amGMP-SEA
14h 45m1 stop
$876Japan Airlines
Find Deal
Sat, Oct 25 - Thu, Oct 30
Logo
9:15 pm - 9:50 pmSEA-GMP
32h 35m2 stops
Logo
12:05 pm - 4:58 pmGMP-SEA
20h 53m2 stops
$946
Find Deal
Sat, Oct 18 - Wed, Oct 22
EVA Air Logo
1:30 am - 7:15 pmSEA-GMP
25h 45m1 stop
EVA Air Logo
1:50 pm - 7:30 pmGMP-SEA
21h 40m1 stop
$1,101EVA Air
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Mon, Oct 13 - Sat, Oct 25
EVA Air Logo
9:40 pm - 7:15 pmSEA-GMP
53h 35m2 stops
EVA Air Logo
7:15 pm - 11:46 amGMP-SEA
32h 31m2 stops
$1,119EVA Air
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Sun, Sep 28 - Tue, Oct 14
ANA Logo
10:05 am - 10:30 pmSEA-GMP
19h 25m2 stops
ANA Logo
12:25 pm - 7:16 pmGMP-SEA
23h 51m2 stops
$1,124ANA
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Wed, Feb 4 - Wed, Feb 11
ANA Logo
9:50 am - 10:30 pmPDX-GMP
19h 40m2 stops
ANA Logo
12:25 pm - 6:30 pmGMP-PDX
23h 05m2 stops
$1,454ANA
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Thu, Dec 4 - Wed, Dec 17
Air China Logo
6:00 am - 1:50 pmPDX-GMP
38h 50m2 stops
Air China Logo
8:35 am - 6:36 pmGMP-PDX
27h 01m2 stops
$1,499Air China
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Sat, Nov 22 - Sat, Nov 29

ANA flights from State of Washington to Seoul Gimpo Intl Airport

Our best ANA deals on State of Washington to Seoul Gimpo Intl Airport flight tickets
ANA
Feb 4
SEA10:05 amSeattle/Tacoma Intl
19h 25m
2 stops
GMP10:30 pmSeoul Gimpo Intl
Feb 11
GMP12:25 pmSeoul Gimpo Intl
23h 51m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$1,124
Find similar
ANA
Aug 19
SEA4:30 pmSeattle/Tacoma Intl
34h 05m
1 stop
GMP6:35 pmSeoul Gimpo Intl
Aug 26
GMP7:40 amSeoul Gimpo Intl
22h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,227
Find similar
ANA
Aug 19
SEA4:30 pmSeattle/Tacoma Intl
34h 05m
1 stop
GMP6:35 pmSeoul Gimpo Intl
Aug 27
GMP12:40 pmSeoul Gimpo Intl
17h 45m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
$1,228
Find similar

Japan Airlines flights from State of Washington to Seoul Gimpo Intl Airport

Our best Japan Airlines deals on State of Washington to Seoul Gimpo Intl Airport flight tickets
Japan Airlines
Oct 17
SEA8:42 amSeattle/Tacoma Intl
21h 08m
2 stops
GMP9:50 pmSeoul Gimpo Intl
Oct 24
GMP7:20 pmSeoul Gimpo Intl
35h 35m
2 stops
SEA2:55 pmSeattle/Tacoma Intl
$871
Find similar
Japan Airlines
Nov 10
SEA12:10 pmSeattle/Tacoma Intl
17h 10m
1 stop
GMP10:20 pmSeoul Gimpo Intl
Nov 20
GMP7:50 amSeoul Gimpo Intl
23h 46m
2 stops
SEA2:36 pmSeattle/Tacoma Intl
$873
Find similar
Japan Airlines
Oct 25
SEA1:55 pmSeattle/Tacoma Intl
16h 25m
1 stop
GMP10:20 pmSeoul Gimpo Intl
Oct 30
GMP12:05 pmSeoul Gimpo Intl
14h 45m
1 stop
SEA10:50 amSeattle/Tacoma Intl
$876
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Seoul Gimpo Intl Airport 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 11, 2025.
Use the filters below to find and compare flights from Washington to Seoul Gimpo Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 9/1

5:30 am-10:25 pm

2 stops24h 55m

Seoul Gimpo Intl

Sat 9/6

8:20 am-6:36 pm

2 stops26h 16m

$806

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Fri 10/17

8:42 am-9:50 pm

2 stops21h 08m

Seoul Gimpo Intl

Fri 10/24

7:20 pm-2:55 pm

2 stops35h 35m

$871

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 11/10

12:10 pm-10:20 pm

1 stop17h 10m

Seoul Gimpo Intl

Thu 11/20

7:50 am-2:36 pm

2 stops23h 46m

$873

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sat 10/25

1:55 pm-10:20 pm

1 stop16h 25m

Seoul Gimpo Intl

Thu 10/30

12:05 pm-10:50 am

1 stop14h 45m

$876

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sat 10/18

9:15 pm-9:50 pm

2 stops32h 35m

Seoul Gimpo Intl

Wed 10/22

12:05 pm-4:58 pm

2 stops20h 53m

$946

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Mon 10/13

1:30 am-7:15 pm

1 stop25h 45m

Seoul Gimpo Intl

Sat 10/25

1:50 pm-7:30 pm

1 stop21h 40m

$1,101

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Sun 9/28

9:40 pm-7:15 pm

2 stops53h 35m

Seoul Gimpo Intl

Tue 10/14

7:15 pm-11:46 am

2 stops32h 31m

$1,119

SeattleSeoul

SEA - GMP

SEAGMP

Seattle/Tacoma Intl

Wed 2/4

10:05 am-10:30 pm

2 stops19h 25m

Seoul Gimpo Intl

Wed 2/11

12:25 pm-7:16 pm

2 stops23h 51m

$1,124

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Thu 12/4

9:50 am-10:30 pm

2 stops19h 40m

Seoul Gimpo Intl

Wed 12/17

12:25 pm-6:30 pm

2 stops23h 05m

$1,454

PortlandSeoul

PDX - GMP

PDXGMP

Portland

Sat 11/22

6:00 am-1:50 pm

2 stops38h 50m

Seoul Gimpo Intl

Sat 11/29

8:35 am-6:36 pm

2 stops27h 01m

$1,499

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 Seoul from

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

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 day to depart on your flight to Seoul Gimpo Intl Airport?

On average, the least expensive day to fly to Seoul Gimpo Intl Airport from State of Washington is on a Thursday. momondo users have found tickets for Thursday departures for as low as $1,283. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Seoul Gimpo Intl Airport is Tuesday, with ticket prices averaging around $1,857.

What is the cheapest time of day to depart on your flight to Seoul Gimpo Intl Airport?

According to our data, the cheapest time of day to fly to Seoul Gimpo Intl Airport is in the afternoon. momondo users have found flights departing from State of Washington to Seoul Gimpo Intl Airport in the afternoon for as low as $1,250. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Seoul Gimpo Intl Airport is in the morning when prices are around $1,586.

Cheap State of Washington to Seoul Gimpo Intl Airport flight deals and tips

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

Best Price Found

$442

Fastest flight time

13h 55m

Direct flights

None
The best one-way flight to Seoul Gimpo Intl Airport from State of Washington in the past 72 hours is $442. The best round-trip flight deal from State of Washington to Seoul Gimpo Intl Airport found on momondo in the last 72 hours is $806.
The fastest flight from State of Washington to Seoul Gimpo Intl Airport takes 13h 55m
There are no direct flights from State of Washington to Seoul Gimpo Intl Airport. Popular non-direct routes for this connection are Portland Airport - Seoul Gimpo Intl Airport, Spokane Airport - Seoul Gimpo Intl Airport and Seattle/Tacoma Intl Airport - Seoul Gimpo Intl Airport.
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  • When did momondo last update prices for flights from Washington to Seoul Gimpo Intl Airport?

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

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

    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 Washington to Seoul Gimpo Intl Airport.

  • What documentation or ID do you need to fly to Seoul Gimpo Intl Airport?

    The necessary travel and health documents for your Seoul Gimpo Intl Airport 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.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington to Seoul for you.

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

momondo does allow users to show only those flights to Seoul from Washington which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search for Washington to Seoul flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

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

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