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Cheap flights from St. Louis to South Korea from $726

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to South Korea departing on 12/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from St. Louis to South Korea

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
4:05 pm - 5:10 pmSTL-ICN
34h 05m2 stops
Air Canada Logo
8:10 pm - 3:29 pmICN-STL
34h 19m1 stop
$787Air Canada
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Mon, Nov 24 - Sat, Dec 6
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
United Airlines Logo
12:45 pm - 5:39 pmICN-STL
43h 54m2 stops
$796United Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 27
American Airlines Logo
7:00 am - 4:45 pmSTL-ICN
18h 45m1 stop
American Airlines Logo
7:15 pm - 10:39 amICN-STL
30h 24m1 stop
$842American Airlines
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Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
4:15 pm - 5:40 amSTL-ICN
22h 25m2 stops
United Airlines Logo
12:45 pm - 4:44 pmICN-STL
18h 59m1 stop
$846United Airlines
Find Deal
Mon, Feb 9 - Fri, Feb 20
Delta Logo
6:09 pm - 3:30 pmSTL-ICN
30h 21m2 stops
Delta Logo
8:05 pm - 11:59 amICN-STL
30h 54m2 stops
$850Delta
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Mon, Nov 10 - Thu, Nov 27
Delta Logo
7:05 pm - 3:30 pmSTL-ICN
29h 25m2 stops
Delta Logo
6:00 pm - 8:39 pmICN-STL
17h 39m1 stop
$851Delta
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Mon, Feb 16 - Sun, Mar 1
American Airlines Logo
7:00 am - 4:45 pmSTL-ICN
18h 45m1 stop
American Airlines Logo
7:15 pm - 10:47 pmICN-STL
18h 32m1 stop
$982American Airlines
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Thu, Dec 11 - Tue, Dec 16
Korean Air Logo
6:45 am - 7:45 pmSTL-TAE
22h 00m2 stops
Korean Air Logo
7:40 am - 11:40 pmTAE-STL
31h 00m2 stops
$1,221Korean Air
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Thu, Feb 26 - Mon, Mar 2
Korean Air Logo
7:30 am - 8:45 pmSTL-PUS
22h 15m2 stops
Korean Air Logo
12:00 pm - 11:40 pmPUS-STL
26h 40m2 stops
$1,224Korean Air
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Thu, Feb 26 - Mon, Mar 2
Air Canada Logo
4:05 pm - 4:05 pmSTL-ICN
34h 00m2 stops
Air Canada Logo
5:45 pm - 3:24 pmICN-STL
35h 39m3 stops
$1,334Air Canada
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Fri, Apr 10 - Mon, Apr 13

United Airlines flights from St. Louis to South Korea

Our best United Airlines deals on St. Louis to South Korea flight tickets
United Airlines
Nov 10
STL5:29 pmLambert-St Louis
21h 11m
1 stop
ICN5:40 amIncheon Intl
Nov 27
ICN12:45 pmIncheon Intl
43h 54m
2 stops
STL5:39 pmLambert-St Louis
$796
Find similar
United Airlines
Feb 9
STL4:15 pmLambert-St Louis
22h 25m
2 stops
ICN5:40 amIncheon Intl
Feb 20
ICN12:45 pmIncheon Intl
18h 59m
1 stop
STL4:44 pmLambert-St Louis
$846
Find similar
United Airlines
Nov 10
STL5:29 pmLambert-St Louis
21h 11m
1 stop
ICN5:40 amIncheon Intl
Nov 27
ICN6:00 pmIncheon Intl
35h 24m
2 stops
STL2:24 pmLambert-St Louis
$863
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Delta flights from St. Louis to South Korea

Our best Delta deals on St. Louis to South Korea flight tickets
Delta
Nov 10
STL6:40 amLambert-St Louis
19h 10m
1 stop
ICN4:50 pmIncheon Intl
Nov 27
ICN7:25 pmIncheon Intl
17h 33m
1 stop
STL9:58 pmLambert-St Louis
$846
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Delta
Nov 10
STL6:09 pmLambert-St Louis
30h 21m
2 stops
ICN3:30 pmIncheon Intl
Nov 27
ICN8:05 pmIncheon Intl
30h 54m
2 stops
STL11:59 amLambert-St Louis
$850
Find similar
Delta
Feb 16
STL7:05 pmLambert-St Louis
29h 25m
2 stops
ICN3:30 pmIncheon Intl
Mar 1
ICN6:00 pmIncheon Intl
17h 39m
1 stop
STL8:39 pmLambert-St Louis
$851
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to South Korea that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from St. Louis to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/24

4:05 pm-5:10 pm

2 stops34h 05m

Incheon Intl

Sat 12/6

8:10 pm-3:29 pm

1 stop34h 19m

$787

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

5:29 pm-5:40 am

1 stop21h 11m

Incheon Intl

Thu 11/27

12:45 pm-5:39 pm

2 stops43h 54m

$796

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

7:00 am-4:45 pm

1 stop18h 45m

Incheon Intl

Thu 11/27

7:15 pm-10:39 am

1 stop30h 24m

$842

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 2/9

4:15 pm-5:40 am

2 stops22h 25m

Incheon Intl

Fri 2/20

12:45 pm-4:44 pm

1 stop18h 59m

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

6:09 pm-3:30 pm

2 stops30h 21m

Incheon Intl

Thu 11/27

8:05 pm-11:59 am

2 stops30h 54m

$850

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 2/16

7:05 pm-3:30 pm

2 stops29h 25m

Incheon Intl

Sun 3/1

6:00 pm-8:39 pm

1 stop17h 39m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 12/11

7:00 am-4:45 pm

1 stop18h 45m

Incheon Intl

Tue 12/16

7:15 pm-10:47 pm

1 stop18h 32m

$982

St. LouisDaegu

STL - TAE

STLTAE

Lambert-St Louis

Thu 2/26

6:45 am-7:45 pm

2 stops22h 00m

Daegu

Mon 3/2

7:40 am-11:40 pm

2 stops31h 00m

$1,221

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Thu 2/26

7:30 am-8:45 pm

2 stops22h 15m

Busan Gimhae

Mon 3/2

12:00 pm-11:40 pm

2 stops26h 40m

$1,224

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 4/10

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Mon 4/13

5:45 pm-3:24 pm

3 stops35h 39m

$1,334

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to South Korea from

How to get the cheapest flight ticket from St. Louis to South Korea

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to South Korea?

If you aren’t able to travel to South Korea during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $875.

What is the cheapest day to depart on your flight to South Korea?

On average, the least expensive day to fly to South Korea from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,367. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from St. Louis to South Korea for around $1,713.

What is the cheapest time of day to depart on your flight to South Korea?

Flying to South Korea from St. Louis in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $1,290 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $1,673 on average. Flights to South Korea from St. Louis in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to South Korea?

You are more likely to see cheaper flights to South Korea from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $1,213 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from St. Louis for as low as $1,065 on momondo.

Can stopping save me money on St. Louis to South Korea flights?

You could potentially save up to 48% on your flight if you consider stops on a St. Louis to South Korea flight.

Cheap St. Louis to South Korea flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to South Korea

Direct flights

None
There are no direct flights from St. Louis to South Korea. There are no popular flight routes from St. Louis to South Korea.
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  • When did momondo last update prices for flights from Lambert-St Louis Airport to South Korea?

    Prices for flights from Lambert-St Louis Airport to South Korea were last updated today.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to South Korea?

  • How old do you have to be to fly from Lambert-St Louis Airport to South Korea?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Lambert-St Louis Airport to South Korea.

  • What documentation or ID do you need to fly to South Korea?

    The necessary travel and health documents for your South Korea trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from St. Louis to South Korea

Compare and see reviews for airlines that fly from St. Louis to South Korea with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $799Free CancellationRating
7.1
10,377 reviews
Search Air Canada flights
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,030 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
7,993 reviews
Search Delta flights
United AirlinesPriceFrom $902Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
Korean AirPriceFrom $1,057Free CancellationRating
8.4
1,155 reviews
Search Korean Air flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to South Korea?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to South Korea. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to South Korea with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to South Korea from St. Louis with this policy.

How can momondo help me find flights from St. Louis to South Korea?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to South Korea.

I’m not ready to book a flight from St. Louis to South Korea right now. Can momondo alert me if prices change?

Price alerts on flights to South Korea from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your South Korea trip

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