$590 Cheap Flights from Jeju (CJU) to Seattle (SEA)

View $590 flight on Wed, Jun 24, 2026Opens in a new window

Popular airlines from Jeju Intl. Airport (CJU) to Seattle-Tacoma International Airport (SEA)

  • notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
  • deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Jeju to Seattle (CJU-SEA)

Prices were available within the past 7 days and start at $590 for one-way flights and $1,166 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Singapore Airlines
Wed, Nov 12 - Sun, Nov 16
CJU
Jeju City
SEA
Seattle
$1,166 Roundtrip, found 6 days ago
$1,166
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Wed, Nov 12 from Jeju City to Seattle, returning Sun, Nov 16, priced at $1,166 found 6 days ago
Singapore Airlines
Wed, Nov 12 - Sun, Nov 16
CJU
Jeju City
SEA
Seattle
$1,207 Roundtrip, found 6 days ago
$1,207
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Wed, Nov 12 from Jeju City to Seattle, returning Sun, Nov 16, priced at $1,207 found 6 days ago
Singapore Airlines
Fri, Apr 3 - Sun, Apr 12
CJU
Jeju City
SEA
Seattle
$1,248 Roundtrip, found 4 days ago
$1,248
Roundtrip
found 4 days ago
Select Singapore Airlines flight, departing Fri, Apr 3 from Jeju City to Seattle, returning Sun, Apr 12, priced at $1,248 found 4 days ago
Singapore Airlines
Wed, Nov 12 - Sun, Nov 16
CJU
Jeju City
SEA
Seattle
$1,285 Roundtrip, found 6 days ago
$1,285
Roundtrip
found 6 days ago
Select Singapore Airlines flight, departing Wed, Nov 12 from Jeju City to Seattle, returning Sun, Nov 16, priced at $1,285 found 6 days ago
Singapore Airlines
Fri, Apr 3 - Sun, Apr 12
CJU
Jeju City
SEA
Seattle
$1,287 Roundtrip, found 4 days ago
$1,287
Roundtrip
found 4 days ago
Select Singapore Airlines flight, departing Fri, Apr 3 from Jeju City to Seattle, returning Sun, Apr 12, priced at $1,287 found 4 days ago
Singapore Airlines
Fri, Apr 3 - Sun, Apr 12
CJU
Jeju City
SEA
Seattle
$1,325 Roundtrip, found 4 days ago
$1,325
Roundtrip
found 4 days ago
Select Singapore Airlines flight, departing Fri, Apr 3 from Jeju City to Seattle, returning Sun, Apr 12, priced at $1,325 found 4 days ago
Cathay Pacific
Wed, May 20 - Wed, Jun 10
CJU
Jeju City
SEA
Seattle
$1,739 Roundtrip, found 5 days ago
$1,739
Roundtrip
found 5 days ago
Select Cathay Pacific flight, departing Wed, May 20 from Jeju City to Seattle, returning Wed, Jun 10, priced at $1,739 found 5 days ago
Korean Air
Fri, Apr 3 - Sun, Apr 12
CJU
Jeju City
SEA
Seattle
$1,939 Roundtrip, found 4 days ago
$1,939
Roundtrip
found 4 days ago
Select Korean Air flight, departing Fri, Apr 3 from Jeju City to Seattle, returning Sun, Apr 12, priced at $1,939 found 4 days ago
Juneyao Air
Wed, Nov 12 - Sun, Nov 16
CJU
Jeju City
SEA
Seattle
$3,003 Roundtrip, found 6 days ago
$3,003
Roundtrip
found 6 days ago
Select Juneyao Air flight, departing Wed, Nov 12 from Jeju City to Seattle, returning Sun, Nov 16, priced at $3,003 found 6 days ago
Air China
Wed, May 20 - Wed, Jun 10
CJU
Jeju City
SEA
Seattle
$3,122 Roundtrip, found 5 days ago
$3,122
Roundtrip
found 5 days ago
Select Air China flight, departing Wed, May 20 from Jeju City to Seattle, returning Wed, Jun 10, priced at $3,122 found 5 days ago
Flights from Jeju (CJU) to Seattle (SEA)
Origin airport
Jeju Intl.
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$1,166
Distance
5410 mi

Jeju to Seattle Flights

The cheapest times to fly from Jeju 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 Jeju to Seattle are during the month of November. You can find some of the cheapest flights from Jeju to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Jeju to Seattle

Sunday is one of the best days to book for cheap flights from Jeju 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 Jeju 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 Jeju to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $590 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 Jeju 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 Jeju 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 Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA) cost?
Secure a cheap one-way flight from $590 or cheap return flight from $1,166 from Jeju Intl. Airport (CJU) 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 Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest month to fly from CJU to SEA is November, when there's less demand. Off-peak season is often when airlines offer better prices between these airports.
What is the cheapest airline that flies from Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from CJU to SEA, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA)?
There are no daily direct flights departing from Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA). But you can opt for flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be on your way in no time.
What day of the week has the most flights from CJU to SEA?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* However, 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 Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA)?
To arrive at Seattle - Tacoma Intl. Airport (SEA) without delays, opt for a flight that takes off from Jeju Intl. Airport (CJU) before 3 PM. The chance 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.
Is it cheaper to buy a plane ticket from Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Last-minute bookings from CJU to SEA are generally more expensive. For the cheapest rates, start searching for flights as early as possible. That said, if you can play around with your travel dates, it's possible to find a cheap ticket right before you leave.
Is it cheaper to book a CJU to SEA flight and hotel package?
Opting for a CJU to SEA flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Pick from our impressive range of stays and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Jeju Intl. Airport (CJU) to Seattle - Tacoma Intl. Airport (SEA)?
It's generally possible to reschedule or cancel your CJU to SEA flight. However, if it's been more than 24 hours since booking, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.