$484 Cheap Flights from Seoul (GMP) to Seattle (SEA)

View $484 flight on Thu, Mar 12, 2026Opens in a new window

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

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Cheap Flights from Seoul to Seattle (GMP-SEA)

Prices were available within the past 7 days and start at $484 for one-way flights and $929 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All Nippon Airways
Wed, Mar 11 - Wed, Mar 25
GMP
Seoul
SEA
Seattle
$929 Roundtrip, found 1 day ago
$929
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Wed, Mar 11 from Seoul to Seattle, returning Wed, Mar 25, priced at $929 found 1 day ago
All Nippon Airways
Wed, Dec 3 - Thu, Dec 4
GMP
Seoul
SEA
Seattle
$934 Roundtrip, found 6 days ago
$934
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Seoul to Seattle, returning Thu, Dec 4, priced at $934 found 6 days ago
All Nippon Airways
Wed, Nov 26 - Wed, Dec 3
GMP
Seoul
SEA
Seattle
$937 Roundtrip, found 5 hours ago
$937
Roundtrip
found 5 hours ago
Select All Nippon Airways flight, departing Wed, Nov 26 from Seoul to Seattle, returning Wed, Dec 3, priced at $937 found 5 hours ago
All Nippon Airways
Tue, Oct 21 - Tue, Oct 28
GMP
Seoul
SEA
Seattle
$938 Roundtrip, found 6 days ago
$938
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Tue, Oct 21 from Seoul to Seattle, returning Tue, Oct 28, priced at $938 found 6 days ago
All Nippon Airways
Thu, Jan 15 - Wed, Jan 21
GMP
Seoul
SEA
Seattle
$941 Roundtrip, found 11 hours ago
$941
Roundtrip
found 11 hours ago
Select All Nippon Airways flight, departing Thu, Jan 15 from Seoul to Seattle, returning Wed, Jan 21, priced at $941 found 11 hours ago
All Nippon Airways
Wed, Dec 3 - Wed, Dec 31
GMP
Seoul
SEA
Seattle
$950 Roundtrip, found 5 days ago
$950
Roundtrip
found 5 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Seoul to Seattle, returning Wed, Dec 31, priced at $950 found 5 days ago
EVA Airways
Sat, Nov 22 - Fri, Nov 28
GMP
Seoul
SEA
Seattle
$954 Roundtrip, found 5 days ago
$954
Roundtrip
found 5 days ago
Select EVA Airways flight, departing Sat, Nov 22 from Seoul to Seattle, returning Fri, Nov 28, priced at $954 found 5 days ago
All Nippon Airways
Wed, Dec 3 - Wed, Dec 31
GMP
Seoul
SEA
Seattle
$954 Roundtrip, found 5 days ago
$954
Roundtrip
found 5 days ago
Select All Nippon Airways flight, departing Wed, Dec 3 from Seoul to Seattle, returning Wed, Dec 31, priced at $954 found 5 days ago
Jeju Air
Mon, Nov 24 - Wed, Dec 3
GMP
Seoul
SEA
Seattle
$997 Roundtrip, found 22 hours ago
$997
Roundtrip
found 22 hours ago
Select Jeju Air flight, departing Mon, Nov 24 from Seoul to Seattle, returning Wed, Dec 3, priced at $997 found 22 hours ago
Japan Airlines
Mon, Oct 13 - Mon, Nov 17
GMP
Seoul
SEA
Seattle
$1,207 Roundtrip, found 5 days ago
$1,207
Roundtrip
found 5 days ago
Select Japan Airlines flight, departing Mon, Oct 13 from Seoul to Seattle, returning Mon, Nov 17, priced at $1,207 found 5 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
$928
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 March. 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 $484 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?
Snag a cheap one-way flight from $484 or cheap return flight from $929 from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
Planning your trip for March can help you save, as it's the cheapest month for flights between GMP and SEA. You'll typically find the lowest prices during off-peak months.
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 Gimpo Intl. Airport (GMP) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline flying from GMP to SEA, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
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.