$410 Cheap Flights from Seoul (ICN) to Seattle (SEA)

View $410 flight on Fri, Oct 10, 2025Opens in a new window

Popular airlines from Incheon Intl. Airport (ICN) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Seoul to Seattle (ICN-SEA)

Prices were available within the past 7 days and start at $410 for one-way flights and $542 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sun, Sep 21 - Sun, Sep 28
ICN
Seoul
SEA
Seattle
$542 Roundtrip, just found
$542
Roundtrip
just found
Select Alaska Airlines flight, departing Sun, Sep 21 from Seoul to Seattle, returning Sun, Sep 28, priced at $542 just found
Alaska Airlines
Thu, Oct 23 - Fri, Oct 31
ICN
Seoul
SEA
Seattle
$542 Roundtrip, found 6 days ago
$542
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Thu, Oct 23 from Seoul to Seattle, returning Fri, Oct 31, priced at $542 found 6 days ago
Alaska Airlines
Fri, Oct 24 - Fri, Oct 31
ICN
Seoul
SEA
Seattle
$546 Roundtrip, found 2 hours ago
$546
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Fri, Oct 24 from Seoul to Seattle, returning Fri, Oct 31, priced at $546 found 2 hours ago
Alaska Airlines
Sat, Sep 13 - Thu, Oct 30
ICN
Seoul
SEA
Seattle
$550 Roundtrip, found 3 days ago
$550
Roundtrip
found 3 days ago
Select Alaska Airlines flight, departing Sat, Sep 13 from Seoul to Seattle, returning Thu, Oct 30, priced at $550 found 3 days ago
Alaska Airlines
Mon, Sep 22 - Sat, Oct 18
ICN
Seoul
SEA
Seattle
$552 Roundtrip, just found
$552
Roundtrip
just found
Select Alaska Airlines flight, departing Mon, Sep 22 from Seoul to Seattle, returning Sat, Oct 18, priced at $552 just found
Hawaiian Airlines
Wed, Nov 12 - Tue, Nov 18
ICN
Seoul
SEA
Seattle
$556 Roundtrip, found 4 hours ago
$556
Roundtrip
found 4 hours ago
Select Hawaiian Airlines flight, departing Wed, Nov 12 from Seoul to Seattle, returning Tue, Nov 18, priced at $556 found 4 hours ago
United
Tue, Sep 30 - Tue, Oct 21
ICN
Seoul
SEA
Seattle
$570 Roundtrip, found 2 days ago
$570
Roundtrip
found 2 days ago
Select United flight, departing Tue, Sep 30 from Seoul to Seattle, returning Tue, Oct 21, priced at $570 found 2 days ago
Asiana Airlines
Mon, Oct 6 - Tue, Oct 21
ICN
Seoul
SEA
Seattle
$596 Roundtrip, just found
$596
Roundtrip
just found
Select Asiana Airlines flight, departing Mon, Oct 6 from Seoul to Seattle, returning Tue, Oct 21, priced at $596 just found
Delta
Sun, Sep 21 - Sun, Oct 19
ICN
Seoul
SEA
Seattle
$633 Roundtrip, just found
$633
Roundtrip
just found
Select Delta flight, departing Sun, Sep 21 from Seoul to Seattle, returning Sun, Oct 19, priced at $633 just found
Korean Air
Sun, Sep 21 - Sun, Sep 28
ICN
Seoul
SEA
Seattle
$654 Roundtrip, just found
$654
Roundtrip
just found
Select Korean Air flight, departing Sun, Sep 21 from Seoul to Seattle, returning Sun, Sep 28, priced at $654 just found

Find the cheapest month to fly from Seoul (ICN) to Seattle (SEA)

May is typically the cheapest month to fly

From $467 - $888 per traveler.

Graph displaying average flight prices per month

Alternative airports near Seattle

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

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $794
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $794
Flights from Seoul (ICN) to Seattle (SEA)
Origin airport
Incheon Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Air Canada, Air China, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, Delta, EVA Airways, Hawaiian Airlines, Japan Airlines, Korean Air, Philippine Airlines, United, WestJet
Roundtrip price
$541
Distance
5203 mi
Average flight time
-5 hours -34 mins

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 September. 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 $410 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 Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $410 or cheap return flight from $542 from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
September is the cheapest month to fly from ICN to SEA. Planning your trip for the off-season is often the key to better flight prices.
Which airlines fly direct from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
Skip the stopovers and travel nonstop to Seattle - Tacoma Intl. Airport (SEA) from Incheon Intl. Airport (ICN) with 3 carriers, including:

  • Korean Air
  • Delta Air Lines
  • Asiana Airlines

What is the cheapest airline that flies from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
While prices may vary depending on your travel dates, Korean Air and Delta Air Lines are popular choices for flights between Incheon Intl. Airport (ICN) and Seattle - Tacoma Intl. Airport (SEA). You can also compare airlines on Expedia and use the "Sort by" filter to find the cheapest fare for your ICN to SEA flight.
How many flights per day from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
When flying out of Incheon Intl. Airport (ICN), you can take your pick from an average of 3 daily nonstop flights to Seattle - Tacoma Intl. Airport (SEA).
What are the most popular departure times for flights from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
The 4 PM departures from ICN to SEA are the top choice for many travelers. Greater demand means you'll likely pay more for these departures. If you want to save money, book during off-peak hours.
What day of the week has the most flights from ICN to SEA?
If you fly on a Sunday, you'll get the largest range of choices for flights from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
Incheon Intl. Airport (ICN)'s first flight to Seattle - Tacoma Intl. Airport (SEA) is at approximately 4:10PM UTC+9. With a flight time of 9h 50m, you'll touch down at around 9:00AM UTC-8.
How long does it take to fly from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight time from ICN to SEA is 10 hours and 1 minute, covering a distance of 5,200 mi.
What is the best time to fly from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
To reach Seattle - Tacoma Intl. Airport (SEA) without delays, choose a flight that takes off from Incheon Intl. Airport (ICN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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.
What airports do you fly into for Seattle from Incheon Intl. Airport (ICN)?
If you're traveling on a direct flight from Incheon Intl. Airport (ICN) to Seattle, Seattle - Tacoma Intl. Airport (SEA) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your plane ticket from ICN to SEA shortly before your getaway is usually more expensive. But if there's some wiggle room with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book an ICN to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking an ICN to SEA flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place takes the hassle out of travel planning. Just secure your flights and select from our extensive range of hotels, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Incheon Intl. Airport (ICN) to Seattle - Tacoma Intl. Airport (SEA)?
If you reserved your ICN to SEA flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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*Available to One Key members.