$791 Cheap Flights from Seattle (SEA) to Seoul (GMP)

View $791 flight on Tue, Jul 21, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Gimpo Intl. Airport (GMP)

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Cheap Flights from Seattle to Seoul (SEA-GMP)

Prices were available within the past 7 days and start at $791 for one-way flights and $1,006 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, Nov 1 - Tue, Nov 24
SEA
Seattle
GMP
Seoul
$1,006 Roundtrip, found 2 days ago
$1,006
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sun, Nov 1 from Seattle to Seoul, returning Tue, Nov 24, priced at $1,006 found 2 days ago
Air Canada
Wed, Nov 18 - Fri, Nov 27
SEA
Seattle
GMP
Seoul
$1,044 Roundtrip, found 6 days ago
$1,044
Roundtrip
found 6 days ago
Select Air Canada flight, departing Wed, Nov 18 from Seattle to Seoul, returning Fri, Nov 27, priced at $1,044 found 6 days ago
Air Canada
Fri, Aug 28 - Sat, Sep 12
SEA
Seattle
GMP
Seoul
$1,077 Roundtrip, found 6 days ago
$1,077
Roundtrip
found 6 days ago
Select Air Canada flight, departing Fri, Aug 28 from Seattle to Seoul, returning Sat, Sep 12, priced at $1,077 found 6 days ago
Air Canada
Sun, Nov 1 - Tue, Nov 24
SEA
Seattle
GMP
Seoul
$1,086 Roundtrip, found 2 days ago
$1,086
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sun, Nov 1 from Seattle to Seoul, returning Tue, Nov 24, priced at $1,086 found 2 days ago
Air Canada
Sun, Oct 25 - Fri, Nov 13
SEA
Seattle
GMP
Seoul
$1,124 Roundtrip, found 3 days ago
$1,124
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sun, Oct 25 from Seattle to Seoul, returning Fri, Nov 13, priced at $1,124 found 3 days ago
Air Canada
Sun, Nov 1 - Tue, Nov 24
SEA
Seattle
GMP
Seoul
$1,151 Roundtrip, found 2 days ago
$1,151
Roundtrip
found 2 days ago
Select Air Canada flight, departing Sun, Nov 1 from Seattle to Seoul, returning Tue, Nov 24, priced at $1,151 found 2 days ago
Air Canada
Tue, Sep 1 - Thu, Sep 10
SEA
Seattle
GMP
Seoul
$1,162 Roundtrip, found 3 days ago
$1,162
Roundtrip
found 3 days ago
Select Air Canada flight, departing Tue, Sep 1 from Seattle to Seoul, returning Thu, Sep 10, priced at $1,162 found 3 days ago
Japan Airlines
Tue, Jul 21 - Tue, Sep 15
SEA
Seattle
GMP
Seoul
$1,337 Roundtrip, found 3 hours ago
$1,337
Roundtrip
found 3 hours ago
Select Japan Airlines flight, departing Tue, Jul 21 from Seattle to Seoul, returning Tue, Sep 15, priced at $1,337 found 3 hours ago
All Nippon Airways
Wed, Aug 12 - Tue, Aug 18
SEA
Seattle
GMP
Seoul
$1,674 Roundtrip, found 1 hour ago
$1,674
Roundtrip
found 1 hour ago
Select All Nippon Airways flight, departing Wed, Aug 12 from Seattle to Seoul, returning Tue, Aug 18, priced at $1,674 found 1 hour ago
Air China
Mon, Apr 27 - Sat, May 9
SEA
Seattle
GMP
Seoul
$2,312 Roundtrip, found 17 hours ago
$2,312
Roundtrip
found 17 hours ago
Select Air China flight, departing Mon, Apr 27 from Seattle to Seoul, returning Sat, May 9, priced at $2,312 found 17 hours ago

Alternative airports near Seoul

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Incheon Intl. ICN. Cheapest option available. Average driving time to city center is 47 minutes. Flights from $1,061
ICN
Incheon Intl.
Cheapest
Average driving time to city center47 min
Flights from $1,061

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) cost?
You can find cheap one-way flights from $791 and cheap return flights from $1,006 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) with Expedia. One-way flights typically cost between $508 and $4292, and return flights often range between $1065 and $7210. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
The cheapest month to fly from SEA to GMP is November when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
Enter SEA to GMP and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
Air China is one of the cheapest airlines offering connecting flights from Seattle - Tacoma Intl. (SEA) to Gimpo Intl. (GMP), with round-trip tickets starting from around $1,207.31 with a layover in Los Angeles Intl. (LAX). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
The earliest flight from Seattle - Tacoma International Airport (SEA) to Gimpo International Airport (GMP) typically departs at around 12:30 AM, with options from Alaska Airlines, American Airlines, and Japan Airlines. This early flight can help you make the most of your time in Seoul. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
The most popular departure times for flights from Seattle, WA (SEA) to Seoul (GMP) are in the late afternoon, from 3pm to 6pm. About 25% of passengers prefer this time window. Many major carriers, including Alaska Airlines, American Airlines, and Japan Airlines, offer flights during this window. This timing works well because it allows you to enjoy a full day in Seattle before heading to your destination.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
A flight from SEA to GMP with a layover takes around 18 hours 50 minutes, with the route covering approximately 5,187 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
Business class seats are offered on the SEA to GMP route with United Airlines and All Nippon Airways.
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seoul from Seattle - Tacoma Intl. (SEA)?
When traveling from Seattle - Tacoma Intl. (SEA) to Seoul, you can fly into Gimpo Intl. (GMP) and Incheon Intl. (ICN). Some flights may connect through major hubs like Los Angeles Intl. (LAX), San Francisco Intl. (SFO), Vancouver Intl. (YVR) before reaching Seoul. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) Seoul Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Seoul (GMP-Gimpo Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Gimpo Intl.
Airlines serving
Air China, All Nippon Airways, Japan Airlines
Roundtrip price
$1,005
Distance
5185 mi

Book with confidence

Seattle to Seoul Flights

The cheapest times to fly from Seattle to Seoul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Seoul are during the month of November. You can find some of the cheapest flights from Seattle to Seoul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Seoul

Sunday is one of the best days to book for cheap flights from Seattle to Seoul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Seoul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Seoul in 2026. You can also book with separate airlines for your outbound and return journeys, from $791 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Seoul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Seoul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to Seoul Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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