STL - SEL

$508 Find Cheap Flights from St. Louis to Seoul - Compare and Save

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 Seoul departing on 9/11. 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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Everything you should know

Cheapest round-trip
$1,107
Typical prices: $861-$1,227
United Airlines
Mon 9/7Tue 9/15
STL - ICN • 2 stops
Cheapest one-way
$508
Multiple Airlines
Fri 9/11
STL - ICN • 3 stops
Top airlines
Cheapest • from $1,107 (round-trip)
Best reviews • 8.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between St. Louis and Seoul. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $846 (round-trip)
Shortest trip • 17h 24m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 26% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Seoul!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Seoul (STL-SEL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Seoul 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 Seoul

Mon, Sep 7 - Tue, Sep 15
United Airlines Logo
5:30 pm - 4:20 am
STL
-
ICN
20h 50m
2 stops
United Airlines Logo
5:15 pm - 11:38 pm
ICN
-
STL
20h 23m
1 stop
$1,107United Airlines
Mon, Sep 7 - Tue, Sep 15
United Airlines Logo
4:40 pm - 4:20 am
STL
-
ICN
21h 40m
2 stops
United Airlines Logo
5:15 pm - 11:38 pm
ICN
-
STL
20h 23m
1 stop
$1,107United Airlines
Mon, Oct 5 - Wed, Nov 4
Delta Logo
8:00 am - 3:20 pm
STL
-
ICN
17h 20m
1 stop
Delta Logo
7:25 pm - 9:59 pm
ICN
-
STL
17h 34m
1 stop
$1,107Delta
Mon, Oct 26 - Wed, Nov 25
Delta Logo
6:47 am - 4:50 pm
STL
-
ICN
20h 03m
1 stop
Delta Logo
9:35 am - 1:23 pm
ICN
-
STL
18h 48m
1 stop
$1,107Delta
Tue, Oct 13 - Mon, Nov 2
American Airlines Logo
5:40 am - 3:45 pm
STL
-
ICN
20h 05m
1 stop
American Airlines Logo
6:50 pm - 11:33 pm
ICN
-
STL
19h 43m
1 stop
$1,107American Airlines
Mon, Sep 7 - Tue, Sep 15
American Airlines Logo
6:36 am - 3:45 pm
STL
-
ICN
19h 09m
1 stop
American Airlines Logo
5:50 pm - 11:43 pm
ICN
-
STL
19h 53m
1 stop
$1,107American Airlines
Wed, Aug 26 - Wed, Sep 2
United Airlines Logo
4:40 pm - 4:20 am
STL
-
ICN
21h 40m
2 stops
United Airlines Logo
11:30 am - 6:39 pm
ICN
-
STL
21h 09m
1 stop
$1,107United Airlines
Mon, Oct 5 - Wed, Nov 4
Delta Logo
2:30 pm - 4:00 am
STL
-
ICN
23h 30m
1 stop
Delta Logo
9:35 am - 8:51 pm
ICN
-
STL
26h 16m
1 stop
$1,107Delta
Thu, Sep 17 - Tue, Oct 6
Korean Air Logo
8:00 am - 3:20 pm
STL
-
ICN
17h 20m
1 stop
Korean Air Logo
7:20 pm - 12:44 am
ICN
-
STL
19h 24m
1 stop
$6,708Korean Air
Wed, Sep 23 - Wed, Oct 7
Korean Air Logo
8:46 am - 5:20 pm
STL
-
ICN
18h 34m
1 stop
Korean Air Logo
7:20 pm - 12:44 am
ICN
-
STL
19h 24m
1 stop
$6,708Korean Air
Booking Insights

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

Get data-powered insights and trends into flights from St. Louis to Seoul 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 Seoul?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Seoul, 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 Seoul is February, where tickets cost $865 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $1,536 and $1,420 respectively.

Good to know

Low season

January

Cheapest flight

$508
Best time to beat the crowds but there is an average 35% increase in price.
Most popular time to fly and prices are also 27% lower on average.
Flight from St. Louis to Seoul Incheon Airport

When to book flights from St. Louis to Seoul

Are your dates flexible? Find out the best times to travel from St. Louis to Seoul based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Seoul

  • What is the cheapest flight from St. Louis to Seoul?

    In the last 5 days, the lowest price for a flight from St. Louis to Seoul was $508 for a one-way ticket and $1,107 for a round-trip.

  • Do I need a passport to fly between St. Louis and Seoul?

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in Seoul.

  • Which airports will I be using when flying from St. Louis to Seoul?

    On your way to Seoul, you’ll fly out from Lambert-St Louis. You’ll be landing in one of Seoul’s 2 airports: Seoul Gimpo Intl or Incheon Intl.

  • Which aircraft models fly most regularly from St. Louis to Seoul?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Seoul?

    Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and Seoul, with Star Alliance being the most commonly used for this route.

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

    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 Seoul.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seoul from St. Louis 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 Seoul?

    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 to Seoul with an airline and back to St. Louis with another airline.

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

    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 to Seoul from St. Louis 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 Seoul

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Seoul. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Seoul? 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 1223 reviews
8.3Comfort
8.1Food
8.5Boarding
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.

I was given middle seat on this flight and prior Boston to Seoul flight That is a problem for long flights, Kayak system did not give me a change to select my seats and assigned me middle seats regardless of my elevated status in Delta. This needs immediate attention.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

The flight attendant on Korean airline was a super nice. it’s one of the best over-sea airline I flew so far.

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.

All in all it was a long flight in economy class. There’s only so much comfort one can expect on a plane. The seats felt exceptionally hard and as an over 6’ individual I’ll seldom feel great about legroom. The food was good and the flight crew was great. The headphones provided for the movies were terrible, though

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.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

United Airline crews were very friendly and very attentive. 12 hours flight was gone like in a shorter one.

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.

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.

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 Seoul

Information on your arrival and departure airports