$578 Find Cheap Flights from St. Louis to South Korea

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to South Korea departing on 9/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from St. Louis to South Korea

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seoul
Incheon2 stops$1,061
Jeju City
Jeju City3 stops$2,948
Seoul
Incheon2 stops$1,061
Jeju City
Jeju City3 stops$2,948

Book Cheap St. Louis to South Korea Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to South Korea that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to South Korea

Fri, Oct 16 - Sun, Oct 25
WestJet Logo
6:30 am - 6:45 pm
STL
-
ICN
46h 15m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
40h 33m
2 stops
$1,061WestJet
Mon, Oct 19 - Mon, Nov 2
WestJet Logo
5:30 pm - 6:45 pm
STL
-
ICN
59h 15m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
41h 33m
2 stops
$1,079WestJet
Fri, Oct 16 - Sun, Oct 25
WestJet Logo
3:42 pm - 6:45 pm
STL
-
ICN
37h 03m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
40h 33m
2 stops
$1,095WestJet
Sat, Oct 3 - Sat, Oct 17
WestJet Logo
4:10 pm - 6:45 pm
STL
-
ICN
60h 35m
2 stops
WestJet Logo
8:45 pm - 11:39 pm
ICN
-
STL
40h 54m
2 stops
$1,102WestJet
Tue, Sep 8 - Tue, Sep 15
Japan Airlines Logo
9:32 am - 9:15 pm
STL
-
GMP
21h 43m
2 stops
Japan Airlines Logo
12:05 pm - 11:40 pm
GMP
-
STL
25h 35m
2 stops
$1,447Japan Airlines
Sun, Aug 30 - Thu, Sep 3
Japan Airlines Logo
5:00 am - 5:55 pm
STL
-
GMP
46h 55m
2 stops
Japan Airlines Logo
12:05 pm - 4:20 pm
GMP
-
STL
42h 15m
2 stops
$1,554Japan Airlines
Thu, Sep 10 - Mon, Sep 14
Korean Air Logo
6:40 am - 7:55 pm
STL
-
TAE
23h 15m
2 stops
Korean Air Logo
7:55 am - 7:58 pm
TAE
-
STL
26h 03m
2 stops
$1,769Korean Air
Thu, Aug 13 - Mon, Aug 17
Korean Air Logo
9:15 am - 7:55 pm
STL
-
TAE
44h 40m
2 stops
Korean Air Logo
7:55 am - 11:46 am
TAE
-
STL
41h 51m
2 stops
$1,857Korean Air
Fri, Aug 7 - Fri, Aug 14
Multiple Airlines Logo
12:10 pm - 9:05 am
STL
-
CJU
30h 55m
3 stops
Multiple Airlines Logo
4:00 pm - 8:24 pm
CJU
-
STL
42h 24m
2 stops
$2,948Multiple Airlines
Fri, Aug 7 - Fri, Aug 14
Multiple Airlines Logo
8:55 am - 10:30 pm
STL
-
CJU
23h 35m
2 stops
Multiple Airlines Logo
4:00 pm - 8:24 pm
CJU
-
STL
42h 24m
2 stops
$3,014Multiple Airlines
Booking Insights

KAYAK's insights & trends for St. Louis to South Korea flights

Get data-powered insights and trends into flights from St. Louis to South Korea to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to South Korea?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to South Korea, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to South Korea is March, when tickets cost $745 (return) on average. On the other hand, the most expensive months are June and August, when the average cost of round-trip tickets is $1,083 and $866 respectively.

Good to know

Low seasonAugust
Cheapest flight$578
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly with an average 25% increase in price.
Flight from St. Louis to Seoul Incheon Airport

FAQs - booking South Korea flights

  • How does KAYAK find such low prices on flights from St. Louis to South Korea?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to South Korea.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to South Korea?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to South Korea is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to South Korea?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to South Korea with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to South Korea?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to South Korea up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from St. Louis to South Korea

 
Need help choosing which airline to fly with from St. Louis to South Korea? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.4
Korean AirOverall score based on 1219 reviews
8.3Comfort
8.5Boarding
8.1Food
8.7Crew
8.2Entertainment
Airline reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

10.0 ExcellentVivian, Nov 2025
SEA - ICN
Read more Korean Air reviews

The boarding process was efficient and quick. The seats were comfortable. The food was good. The service was excellent. We had a lovely flight from Seattle on Korean air

Flight crew was fantastic. The aircraft was meticulously cleaned at all times. The crew was continuously checking to see if the passengers were ok.

It was good, I liked the self-serve snacks but it was a little difficult to get the alcohol, which is understandable since I wouldn't want kids sneaking it.

Friendly flight attendants and gate agents. Very clean plane and food was good!

I was unable to select decent seats, and so I was stuck in the middle seat because it was selected for me

There was a lot of partial tv shows but not enough to last the flight. The food was incredible! The crew were so helpful and patient. Lots more space than what I usually get on an international flight. Very comfortable!

Stingy on the drinks - 15 hour direct flight and could barely get attention for some water

Not many people, so you can lay down on two seats

The delay in Korea was a pain and set us back a day. I have to give big props to Korean Air for setting up a hotel with dinner and transportation to and from the hotel. I also needed assistance with a wheelchair and they did an outstanding job.

long flights are difficult but the crew and amenities made it a very good experience

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Delta has too many delays now days. It is 1:06 am now. I was supposed to land in Norfolk at 10:30 pm. I got re-booked through Detroit and I’m still in Detroit. I hope to be landed in Norfolk by 3am. I’ve been in airports for 12 hours as of right now. There is a weather delay now but most delays lately have been maintenance.

This is the first time I've been disappointed with Delta. I was called by Delta to see if I would volunteer to change flights since my original flight home was overbooked. I accepted. The modified booking only provided me a 35 minute layover - when you subtract the fact that boarding closes for a flight 15 minutes early, that gave me 20 minutes to run for one end of the airport to the other. I barely made it. On the 2.5 hour flight to Tampa, the crew repeatedly let us know over the intercom that they cannot serve drinks or snacks due to safety/turbulence. I would have accepted this reason if they did not CONTINUALLY SERVE DRINKS AND COOKED FOOD to First class. If safety is the excuse then the entire plane should be strapped in for safety. On top of this the air conditioning vents were not working correctly and the plane was uncomfortably warm. I love Delta and am a loyal Delta traveler, and I have never had an experience like this. I don't know if there's a disconnect between availability among third-party sites like KAYAK and the airlines or what, but when overbooking causes issues like this for travelers it should be reviewed and changes to the booking process should be made. I blame BOTH KAYAK and Delta for this terrible experience.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

I always fly with Delta. My friends tell me their horror stories of flying with other airlines. I just smile and say, “You should fly Delta”

The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.

We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.

Fine not above and beyond as I had a connection that was delayed due to maintenance

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

Flight was delayed. De-icing took a while. When we landed had to wait for another plane to vacate our gate. Just an overall bad experience.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Flight was canceled 12 hours before take-off due to “weather”

We were told our seats were switched which put us in row 1 instead of 12. We were not able to keep our personal items with us. This caused us not to be able to have our gum to pop our ears and we weren’t able to get our iPads out due to the seat belt sign never turning off.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Everything you need to know for your flight from St. Louis to South Korea

Information on your arrival and departure airports