$514 Cheap Flights from Seoul (GMP) to Seattle (SEA)

View $514 flight on Mon, Oct 13, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Seoul to Seattle (GMP-SEA)

Prices were available within the past 7 days and start at $514 for one-way flights and $797 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Jeju Air
Mon, Oct 20 - Wed, Oct 29
GMP
Seoul
SEA
Seattle
$797 Roundtrip, found 3 days ago
$797
Roundtrip
found 3 days ago
Select Jeju Air flight, departing Mon, Oct 20 from Seoul to Seattle, returning Wed, Oct 29, priced at $797 found 3 days ago
Asiana Airlines
Mon, Jul 7 - Tue, Jul 15
GMP
Seoul
SEA
Seattle
$854 Roundtrip, found 1 day ago
$854
Roundtrip
found 1 day ago
Select Asiana Airlines flight, departing Mon, Jul 7 from Seoul to Seattle, returning Tue, Jul 15, priced at $854 found 1 day ago
Jeju Air
Mon, Jul 7 - Tue, Jul 15
GMP
Seoul
SEA
Seattle
$865 Roundtrip, found 1 day ago
$865
Roundtrip
found 1 day ago
Select Jeju Air flight, departing Mon, Jul 7 from Seoul to Seattle, returning Tue, Jul 15, priced at $865 found 1 day ago
Korean Air
Mon, Oct 20 - Wed, Oct 29
GMP
Seoul
SEA
Seattle
$867 Roundtrip, found 3 days ago
$867
Roundtrip
found 3 days ago
Select Korean Air flight, departing Mon, Oct 20 from Seoul to Seattle, returning Wed, Oct 29, priced at $867 found 3 days ago
Korean Air
Mon, Oct 20 - Wed, Oct 29
GMP
Seoul
SEA
Seattle
$872 Roundtrip, found 3 days ago
$872
Roundtrip
found 3 days ago
Select Korean Air flight, departing Mon, Oct 20 from Seoul to Seattle, returning Wed, Oct 29, priced at $872 found 3 days ago
Asiana Airlines
Mon, Jul 7 - Tue, Jul 15
GMP
Seoul
SEA
Seattle
$885 Roundtrip, found 1 day ago
$885
Roundtrip
found 1 day ago
Select Asiana Airlines flight, departing Mon, Jul 7 from Seoul to Seattle, returning Tue, Jul 15, priced at $885 found 1 day ago
Air China
Mon, Oct 20 - Wed, Oct 29
GMP
Seoul
SEA
Seattle
$886 Roundtrip, found 3 days ago
$886
Roundtrip
found 3 days ago
Select Air China flight, departing Mon, Oct 20 from Seoul to Seattle, returning Wed, Oct 29, priced at $886 found 3 days ago
Jeju Air
Mon, Oct 20 - Wed, Oct 29
GMP
Seoul
SEA
Seattle
$890 Roundtrip, found 3 days ago
$890
Roundtrip
found 3 days ago
Select Jeju Air flight, departing Mon, Oct 20 from Seoul to Seattle, returning Wed, Oct 29, priced at $890 found 3 days ago
Jeju Air
Mon, Jul 7 - Tue, Jul 15
GMP
Seoul
SEA
Seattle
$896 Roundtrip, found 1 day ago
$896
Roundtrip
found 1 day ago
Select Jeju Air flight, departing Mon, Jul 7 from Seoul to Seattle, returning Tue, Jul 15, priced at $896 found 1 day ago
All Nippon Airways
Mon, Oct 20 - Fri, Oct 31
GMP
Seoul
SEA
Seattle
$944 Roundtrip, found 3 days ago
$944
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Mon, Oct 20 from Seoul to Seattle, returning Fri, Oct 31, priced at $944 found 3 days ago
Flights from Seoul (GMP) to Seattle (SEA)
Origin airport
Gimpo Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
All Nippon Airways, Japan Airlines
Roundtrip price
$796
Distance
5185 mi

Seoul to Seattle Flights

The cheapest times to fly from Seoul to Seattle

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 Seoul to Seattle are during the month of October. You can find some of the cheapest flights from Seoul to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Seoul to Seattle

Sunday is one of the best days to book for cheap flights from Seoul to Seattle: 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 Seoul to Seattle

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 Seoul to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $514 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 Seoul to Seattle 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 Seoul to Seattle 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.

Frequently asked questions

How much does a flight from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA) cost?
Discover the latest flight deals from GMP to SEA by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from GMP to SEA?
The cheapest flights from GMP to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
There are no direct flights from Seoul (GMP-Gimpo Intl.) to Seattle - Tacoma Intl. Airport (SEA). However, you’ll find other airports that offer nonstop flights. Hop on your plane at Incheon Intl. Airport (ICN) and travel straight to Seattle without any detours.
What is the cheapest airline that flies from GMP to SEA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from GMP to SEA. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
Nonstop flights from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel dates and click on either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from GMP to SEA?
Typically you’ll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid possible delays on the Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Departures after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your trip to book a ticket from GMP to SEA generally means paying more. While you may come across some last-minute discounts, they’re not always guaranteed. Be flexible with your travel plans for the best chance of getting a bargain.
Is it cheaper to book a GMP to SEA flight and hotel package?
Opting for a GMP to SEA flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our impressive range of stays and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
Generally, it’s possible to cancel or reschedule your GMP to SEA flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are possible and if any costs are involved. You’ll also find more information on our Customer Service portal.

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*Available to One Key members.