$6,803 Cheap Flights from St. Louis (STL) to Jeju (CJU)

View $6,803 flight on Sat, Dec 13, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Jeju Intl. Airport (CJU)

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Cheap Flights from St. Louis to Jeju (STL-CJU)

Prices were available within the past 7 days and start at $6,803 for one-way flights and $1,241 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Korean Air
Wed, Dec 3 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$1,241 Roundtrip, found 4 days ago
$1,241
Roundtrip
found 4 days ago
Select Korean Air flight, departing Wed, Dec 3 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $1,241 found 4 days ago
Korean Air
Sat, Nov 29 - Sat, Dec 6
STL
St. Louis
CJU
Jeju City
$1,249 Roundtrip, found 4 days ago
$1,249
Roundtrip
found 4 days ago
Select Korean Air flight, departing Sat, Nov 29 from St. Louis to Jeju City, returning Sat, Dec 6, priced at $1,249 found 4 days ago
Delta
Mon, Dec 1 - Sat, Dec 6
STL
St. Louis
CJU
Jeju City
$1,258 Roundtrip, found 4 days ago
$1,258
Roundtrip
found 4 days ago
Select Delta flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Sat, Dec 6, priced at $1,258 found 4 days ago
Delta
Sun, Nov 30 - Thu, Dec 4
STL
St. Louis
CJU
Jeju City
$1,375 Roundtrip, found 4 days ago
$1,375
Roundtrip
found 4 days ago
Select Delta flight, departing Sun, Nov 30 from St. Louis to Jeju City, returning Thu, Dec 4, priced at $1,375 found 4 days ago
Korean Air
Fri, Nov 28 - Tue, Dec 2
STL
St. Louis
CJU
Jeju City
$1,379 Roundtrip, found 4 days ago
$1,379
Roundtrip
found 4 days ago
Select Korean Air flight, departing Fri, Nov 28 from St. Louis to Jeju City, returning Tue, Dec 2, priced at $1,379 found 4 days ago
Korean Air
Wed, Oct 15 - Sat, Oct 18
STL
St. Louis
CJU
Jeju City
$1,524 Roundtrip, found 4 days ago
$1,524
Roundtrip
found 4 days ago
Select Korean Air flight, departing Wed, Oct 15 from St. Louis to Jeju City, returning Sat, Oct 18, priced at $1,524 found 4 days ago
Korean Air
Wed, Oct 15 - Tue, Oct 21
STL
St. Louis
CJU
Jeju City
$1,532 Roundtrip, found 4 days ago
$1,532
Roundtrip
found 4 days ago
Select Korean Air flight, departing Wed, Oct 15 from St. Louis to Jeju City, returning Tue, Oct 21, priced at $1,532 found 4 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$2,381 Roundtrip, found 4 days ago
$2,381
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $2,381 found 4 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$2,391 Roundtrip, found 4 days ago
$2,391
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $2,391 found 4 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$2,411 Roundtrip, found 2 days ago
$2,411
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $2,411 found 2 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$2,421 Roundtrip, found 2 days ago
$2,421
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $2,421 found 2 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$3,081 Roundtrip, found 4 days ago
$3,081
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $3,081 found 4 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$3,093 Roundtrip, found 4 days ago
$3,093
Roundtrip
found 4 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $3,093 found 4 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$3,111 Roundtrip, found 2 days ago
$3,111
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $3,111 found 2 days ago
American Airlines
Mon, Dec 1 - Fri, Dec 5
STL
St. Louis
CJU
Jeju City
$3,122 Roundtrip, found 2 days ago
$3,122
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Dec 1 from St. Louis to Jeju City, returning Fri, Dec 5, priced at $3,122 found 2 days ago
All Nippon Airways
Mon, Nov 24 - Mon, Dec 1
STL
St. Louis
CJU
Jeju City
$10,834 Roundtrip, found 3 days ago
$10,834
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Mon, Nov 24 from St. Louis to Jeju City, returning Mon, Dec 1, priced at $10,834 found 3 days ago
All Nippon Airways
Mon, Nov 24 - Mon, Dec 1
STL
St. Louis
CJU
Jeju City
$10,853 Roundtrip, found 3 days ago
$10,853
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Mon, Nov 24 from St. Louis to Jeju City, returning Mon, Dec 1, priced at $10,853 found 3 days ago
All Nippon Airways
Mon, Nov 24 - Mon, Dec 1
STL
St. Louis
CJU
Jeju City
$10,871 Roundtrip, found 3 days ago
$10,871
Roundtrip
found 3 days ago
Select All Nippon Airways flight, departing Mon, Nov 24 from St. Louis to Jeju City, returning Mon, Dec 1, priced at $10,871 found 3 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU) cost?
Get a cheap one-way flight from $6,803 or cheap return flight from $1,241 from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU)?
The cheapest month to fly from STL to CJU is December, when demand is low. Off-peak months are generally when airlines offer better prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest STL to CJU flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to CJU?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on a range of factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU)?
To land at Jeju Intl. Airport (CJU) without delays, pick a flight that leaves Lambert-St. Louis Intl. Airport (STL) 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.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU) last-minute?
Waiting until just before your departure to book a ticket from STL to CJU generally means paying more. Although you may find some last-minute discounts, they're not always guaranteed. Keep your travel schedule open for the best chance of scoring a bargain.
Is it cheaper to book a STL to CJU flight and hotel package?
You can save money by booking a STL to CJU flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After choosing your ideal flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Jeju Intl. Airport (CJU)?
In most cases, you're able to cancel or reschedule your STL to CJU flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you'd like further information, head to our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Jeju Intl.
Roundtrip price
$1,241
Distance
6913 mi

Book with confidence

St. Louis to Jeju Flights

The cheapest times to fly from St. Louis to Jeju

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 St. Louis to Jeju are during the month of December. You can find some of the cheapest flights from St. Louis to Jeju with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Jeju

Sunday is one of the best days to book for cheap flights from St. Louis to Jeju: 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 St. Louis to Jeju

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 St. Louis to Jeju in 2025. You can also book with separate airlines for your outbound and return journeys, from $6,803 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 St. Louis to Jeju 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 St. Louis to Jeju 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.

 

St. Louis to Jeju Flights

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*Available to One Key members.