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Cheap flights from St. Louis to South Korea from $448

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 10/19. 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

American Airlines Logo
7:41 pm - 3:30 pmSTL-ICN
29h 49m1 stop
American Airlines Logo
5:25 pm - 10:27 pmICN-STL
19h 02m1 stop
$848American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
American Airlines Logo
7:59 pm - 3:30 pmSTL-ICN
29h 31m2 stops
American Airlines Logo
5:25 pm - 8:05 amICN-STL
28h 40m2 stops
$851American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
United Airlines Logo
6:00 pm - 3:46 pmICN-STL
36h 46m2 stops
$855United Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
5:49 pm - 4:20 amSTL-ICN
20h 31m1 stop
United Airlines Logo
11:30 am - 4:54 pmICN-STL
19h 24m1 stop
$856United Airlines
Find Deal
Mon, Sep 1 - Tue, Sep 30
Delta Logo
6:30 am - 3:30 pmSTL-ICN
18h 00m1 stop
Delta Logo
8:05 pm - 12:37 amICN-STL
19h 32m2 stops
$871Delta
Find Deal
Tue, Nov 25 - Wed, Dec 3
Logo
7:59 pm - 10:45 amSTL-GMP
24h 46m2 stops
Logo
7:55 am - 3:49 pmGMP-STL
21h 54m2 stops
$908
Find Deal
Mon, Aug 25 - Sat, Aug 30
Delta Logo
1:30 pm - 5:45 amSTL-ICN
25h 15m1 stop
Delta Logo
7:30 pm - 11:02 pmICN-STL
18h 32m1 stop
$945Delta
Find Deal
Sun, Nov 23 - Mon, Dec 1
Air Canada Logo
1:30 pm - 4:05 pmSTL-ICN
36h 35m2 stops
Air Canada Logo
6:00 pm - 3:18 pmICN-STL
35h 18m2 stops
$1,029Air Canada
Find Deal
Thu, Sep 18 - Wed, Sep 24
Air Canada Logo
4:05 pm - 5:10 pmSTL-ICN
34h 05m2 stops
Air Canada Logo
6:55 pm - 3:29 pmICN-STL
35h 34m2 stops
$1,073Air Canada
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Fri, Nov 21 - Sat, Nov 29
Logo
1:30 pm - 4:05 pmSTL-ICN
36h 35m2 stops
Logo
6:00 pm - 10:50 amICN-STL
30h 50m3 stops
$1,121
Find Deal
Thu, Sep 18 - Wed, Sep 24

American Airlines flights from St. Louis to South Korea

Our best American Airlines deals on St. Louis to South Korea flight tickets
American Airlines
Sep 1
STL7:41 pmLambert-St Louis
29h 49m
1 stop
ICN3:30 pmIncheon Intl
Sep 20
ICN5:25 pmIncheon Intl
19h 02m
1 stop
STL10:27 pmLambert-St Louis
$848
Find similar
American Airlines
Sep 1
STL7:59 pmLambert-St Louis
29h 31m
2 stops
ICN3:30 pmIncheon Intl
Sep 20
ICN5:25 pmIncheon Intl
28h 40m
2 stops
STL8:05 amLambert-St Louis
$851
Find similar
American Airlines
Aug 6
STL5:15 amLambert-St Louis
20h 15m
1 stop
ICN3:30 pmIncheon Intl
Aug 18
ICN5:25 pmIncheon Intl
19h 49m
1 stop
STL11:14 pmLambert-St Louis
$915
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Qatar Airways flights from St. Louis to South Korea

Our best Qatar Airways deals on St. Louis to South Korea flight tickets
Qatar Airways
Aug 6
STL5:52 pmLambert-St Louis
33h 13m
2 stops
ICN5:05 pmIncheon Intl
Aug 17
ICN1:20 amIncheon Intl
36h 39m
2 stops
STL11:59 pmLambert-St Louis
$1,961
Find similar
Qatar Airways
Aug 6
STL12:20 pmLambert-St Louis
38h 45m
2 stops
ICN5:05 pmIncheon Intl
Aug 17
ICN1:20 amIncheon Intl
36h 39m
2 stops
STL11:59 pmLambert-St Louis
$2,131
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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 July 31, 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 9/1

7:41 pm-3:30 pm

1 stop29h 49m

Incheon Intl

Sat 9/20

5:25 pm-10:27 pm

1 stop19h 02m

$848

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

Sat 9/20

5:25 pm-8:05 am

2 stops28h 40m

$851

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

6:00 pm-3:46 pm

2 stops36h 46m

$855

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:49 pm-4:20 am

1 stop20h 31m

Incheon Intl

Tue 9/30

11:30 am-4:54 pm

1 stop19h 24m

$856

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 11/25

6:30 am-3:30 pm

1 stop18h 00m

Incheon Intl

Wed 12/3

8:05 pm-12:37 am

2 stops19h 32m

$871

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 8/25

7:59 pm-10:45 am

2 stops24h 46m

Seoul Gimpo Intl

Sat 8/30

7:55 am-3:49 pm

2 stops21h 54m

$908

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 11/23

1:30 pm-5:45 am

1 stop25h 15m

Incheon Intl

Mon 12/1

7:30 pm-11:02 pm

1 stop18h 32m

$945

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-3:18 pm

2 stops35h 18m

$1,029

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 11/21

4:05 pm-5:10 pm

2 stops34h 05m

Incheon Intl

Sat 11/29

6:55 pm-3:29 pm

2 stops35h 34m

$1,073

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-10:50 am

3 stops30h 50m

$1,121

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $929.

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 $1,260 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 $1,068 on momondo.

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

Best Price Found

$448

Fastest flight time

18h 00m

Direct flights

None

Airports in South Korea

2 airports
The best one-way flight to South Korea from St. Louis in the past 72 hours is $448. The best round-trip flight deal from St. Louis to South Korea found on momondo in the last 72 hours is $848.
The fastest flight from St. Louis to South Korea takes 18h 00m
There are no direct flights from St. Louis to South Korea. Popular non-direct routes for this connection are Lambert-St Louis Airport - Seoul Gimpo Intl Airport and Lambert-St Louis Airport - Incheon Intl Airport.
There are 2 airports near South Korea: Incheon Intl (ICN), Seoul Gimpo Intl (GMP)
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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
9,851 reviews
Search Air Canada flights
DeltaPriceFrom $896Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $902Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $977Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Korean AirPriceFrom $1,080Free CancellationRating
8.4
1,121 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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