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

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 4/13. 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

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$620
Delta
Wed 2/18Tue 3/17
ICN - STL • 2 stops
Cheapest one-way
$578
Typical prices: $540-$904
Multiple Airlines
Mon 4/13
ICN - STL • 3 stops
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Flight Deals
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Flight Deals

Cheap Flights from South Korea to St. Louis

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

Wed, Feb 18 - Tue, Mar 17
Delta Logo
7:30 pm - 11:40 pmICN-STL
19h 10m2 stops
Delta Logo
2:15 pm - 4:30 pmSTL-ICN
36h 15m2 stops
$620Delta
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Thu, Nov 20 - Wed, Dec 3
Delta Logo
7:30 pm - 11:44 pmICN-STL
19h 14m2 stops
Delta Logo
6:00 am - 4:30 pmSTL-ICN
19h 30m2 stops
$622Delta
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Thu, Nov 20 - Wed, Dec 3
American Airlines Logo
7:15 pm - 10:34 pmICN-STL
18h 19m1 stop
American Airlines Logo
7:00 am - 4:45 pmSTL-ICN
18h 45m1 stop
$626American Airlines
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Fri, Nov 7 - Fri, Nov 14
American Airlines Logo
7:15 pm - 4:27 pmICN-STL
36h 12m1 stop
American Airlines Logo
5:17 am - 4:45 pmSTL-ICN
20h 28m1 stop
$635American Airlines
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Wed, Feb 18 - Thu, Mar 19
United Airlines Logo
12:45 pm - 4:44 pmICN-STL
18h 59m1 stop
United Airlines Logo
5:54 pm - 4:40 amSTL-ICN
20h 46m2 stops
$646United Airlines
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Tue, Feb 17 - Thu, Mar 19
United Airlines Logo
6:00 pm - 4:44 pmICN-STL
37h 44m1 stop
United Airlines Logo
5:54 pm - 4:40 amSTL-ICN
20h 46m2 stops
$686United Airlines
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Tue, Feb 17 - Thu, Mar 19
Korean Air Logo
7:30 pm - 11:10 pmICN-STL
18h 40m1 stop
Korean Air Logo
8:50 am - 3:30 pmSTL-ICN
16h 40m1 stop
$704Korean Air
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Thu, Nov 13 - Thu, Nov 20
Korean Air Logo
7:30 pm - 11:23 pmICN-STL
18h 53m1 stop
Korean Air Logo
6:40 am - 4:50 pmSTL-ICN
19h 10m1 stop
$705Korean Air
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Thu, Mar 12 - Thu, Apr 2
Multiple Airlines Logo
10:40 am - 2:32 pmICN-STL
17h 52m1 stop
Multiple Airlines Logo
7:17 am - 4:40 pmSTL-ICN
19h 23m1 stop
$718Multiple Airlines
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Mon, Feb 16 - Fri, Mar 20
Multiple Airlines Logo
9:00 pm - 11:56 pmICN-STL
17h 56m1 stop
Multiple Airlines Logo
2:55 pm - 4:20 amSTL-ICN
23h 25m1 stop
$825Multiple Airlines
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Booking Insights

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

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

How long is the flight to St. Louis?

The duration of your flight to St. Louis depends on your departure and arrival airports. Obviously any flights that include a layover will also be longer. The most popular routes to St. Louis on KAYAK are from Incheon, which takes 17h 17m, Busan, which takes 22h 06m, and Seoul, which takes 23h 57m.

How many direct flights to St. Louis are there each day?

There are around 360 direct flights from within South Korea to St. Louis every day. Most flights depart in the morning, with 8:00 am the most common departure time and 48% of flights departing in the morning.

Good to know

Low seasonSeptember
Cheapest flight$578
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly with an average 33% increase in price.
Flight from Seoul Incheon Airport to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    The city center of St. Louis is 13 miles from Lambert-St Louis Airport.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Wednesday where tickets can be as cheap as $273. On the other hand, the most expensive day to fly is Monday, where prices are $526 on average.

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

    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 to St. Louis.

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

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

    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 St. Louis 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 to St. Louis?

    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 St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to St. Louis?

    The cheapest time of day to fly to St. Louis is generally at night, when flights cost $1,112 on average. The most expensive time of day to fly to St. Louis is generally in the morning, which is peak travel time and where the average cost of a ticket is $1,719.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,518 direct flights from within South Korea to St. Louis. The most common day for departures is Friday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airline flying from South Korea to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from South Korea to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? 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.
7.9
DeltaOverall score based on 7977 reviews
7.3Food
7.9Entertainment
8.2Boarding
7.9Comfort
8.5Crew
Airline reviews

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

6.0 GoodFernando, Oct 2025SAN - ATL
Read more Delta reviews

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

The boarding process needs to be refined. Sometimes the gate crew call out the boarding zone, and then flip to the monitor to show which zones are boarding. So unless everyone is gathered around to see the monitor there is usually confusion as wi which zones are boarding.

On time flight. Seat comfort could be better in the Comfort section.

My issue was with TSA agents for delta airlines. My luggage got flagged. The agent was going thru another persons first. He took 20 min to go thru hers. I asked them to bring mine closer so I could sit down . They said you can go sit it will be fine. I said I am supposed to keep my eyes on my bags at all times. The agent was meticulously unwrapping 2 gifts that the lady had and then tried to re warp it. He was trying to be kind i get it but 20 min for me to stand watching him do that was ridiculous. It was 6 am and there were a ton of travelers. Mine was flagged for some air packed tea that I bought in Turkey. My previous delta flight and 2 others before didn’t flag it. Consistency would be nice. Also on the flight the window shades were down for take off and landing - I thought that was very odd I thought they had to remain open for take off and landing.

The flight was an hour and a half late departing which was inconvenient

Delay in SLC jammed us up in Chicago. Got caught up in rush hour traffic

The crew took good care of us. The flight from ATL to SFO is a longer one, and there were multiple beverage offerings. I like the 757's that Delta uses. Good airplane that is comfortable. I do wish Delta would separate Priority boarding from the better seats. I would gladly take a smaller seat in an open row than be jammed into Comfort just to get priority boarding, just to make sure I don't have to check a bag.

The crew was not very visible. This might be a good thing for people who wanted to sleep but seemed odd when compared to the Atlantic crossing where they are more present in the cabin. The Food (beef) was not good. Tough and tasteless. Would love to see more choices on a long flight like that.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

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