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Cheap flights from St. Louis to South Korea from $433

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 10/18. 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
8:03 pm - 3:30 pmSTL-ICN
29h 27m2 stops
American Airlines Logo
5:45 pm - 8:51 amICN-STL
29h 06m1 stop
$828American Airlines
Find Deal
Sun, Sep 21 - Mon, Oct 6
American Airlines Logo
3:59 pm - 3:30 pmSTL-ICN
33h 31m1 stop
American Airlines Logo
5:55 pm - 9:20 amICN-STL
29h 25m1 stop
$844American Airlines
Find Deal
Sat, Sep 27 - Sun, Oct 26
Air Canada Logo
9:15 am - 5:30 pmSTL-ICN
18h 15m1 stop
Air Canada Logo
7:05 pm - 3:18 pmICN-STL
34h 13m1 stop
$848Air Canada
Find Deal
Sun, Sep 21 - Mon, Oct 6
Delta Logo
6:50 am - 3:20 pmSTL-ICN
18h 30m1 stop
Delta Logo
7:40 pm - 12:24 amICN-STL
19h 44m1 stop
$856Delta
Find Deal
Fri, Oct 24 - Sun, Nov 2
Delta Logo
6:00 am - 4:30 pmSTL-ICN
20h 30m2 stops
Delta Logo
7:40 pm - 12:24 amICN-STL
19h 44m1 stop
$861Delta
Find Deal
Fri, Oct 24 - Sun, Nov 2
United Airlines Logo
4:43 pm - 5:40 amSTL-ICN
21h 57m2 stops
United Airlines Logo
6:00 pm - 12:39 pmICN-STL
33h 39m2 stops
$862United Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
5:15 am - 4:20 amSTL-ICN
33h 05m2 stops
United Airlines Logo
12:45 pm - 10:54 pmICN-STL
24h 09m2 stops
$941United Airlines
Find Deal
Fri, Oct 24 - Sun, Nov 2
Air Canada Logo
9:15 am - 5:30 pmSTL-ICN
18h 15m1 stop
Air Canada Logo
7:05 pm - 3:24 pmICN-STL
34h 19m1 stop
$1,089Air Canada
Find Deal
Mon, Oct 6 - Sat, Apr 4
Korean Air Logo
6:00 am - 4:50 pmSTL-ICN
20h 50m1 stop
Korean Air Logo
4:25 pm - 9:28 pmICN-STL
19h 03m1 stop
$1,130Korean Air
Find Deal
Thu, Oct 16 - Thu, Oct 23
Korean Air Logo
8:53 am - 5:20 pmSTL-ICN
18h 27m1 stop
Korean Air Logo
7:30 pm - 11:06 pmICN-STL
17h 36m1 stop
$1,542Korean Air
Find Deal
Thu, Oct 9 - Wed, Oct 29

Delta flights from St. Louis to South Korea

Our best Delta deals on St. Louis to South Korea flight tickets
Delta
Oct 24
STL6:50 amLambert-St Louis
18h 30m
1 stop
ICN3:20 pmIncheon Intl
Nov 2
ICN7:40 pmIncheon Intl
19h 44m
1 stop
STL12:24 amLambert-St Louis
$856
Find similar
Delta
Oct 24
STL6:00 amLambert-St Louis
20h 30m
2 stops
ICN4:30 pmIncheon Intl
Nov 2
ICN7:40 pmIncheon Intl
19h 44m
1 stop
STL12:24 amLambert-St Louis
$861
Find similar
Delta
Oct 2
STL6:00 amLambert-St Louis
20h 30m
2 stops
ICN4:30 pmIncheon Intl
Oct 13
ICN6:40 pmIncheon Intl
18h 27m
1 stop
STL11:07 pmLambert-St Louis
$866
Find similar

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 21
STL8:03 pmLambert-St Louis
29h 27m
2 stops
ICN3:30 pmIncheon Intl
Oct 6
ICN5:45 pmIncheon Intl
29h 06m
1 stop
STL8:51 amLambert-St Louis
$828
Find similar
American Airlines
Sep 18
STL5:18 amLambert-St Louis
20h 12m
1 stop
ICN3:30 pmIncheon Intl
Oct 4
ICN5:25 pmIncheon Intl
16h 50m
1 stop
STL8:15 pmLambert-St Louis
$837
Find similar
American Airlines
Sep 27
STL3:59 pmLambert-St Louis
33h 31m
1 stop
ICN3:30 pmIncheon Intl
Oct 26
ICN5:55 pmIncheon Intl
29h 25m
1 stop
STL9:20 amLambert-St Louis
$844
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 September 17, 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

Sun 9/21

8:03 pm-3:30 pm

2 stops29h 27m

Incheon Intl

Mon 10/6

5:45 pm-8:51 am

1 stop29h 06m

$828

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/27

3:59 pm-3:30 pm

1 stop33h 31m

Incheon Intl

Sun 10/26

5:55 pm-9:20 am

1 stop29h 25m

$844

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/21

9:15 am-5:30 pm

1 stop18h 15m

Incheon Intl

Mon 10/6

7:05 pm-3:18 pm

1 stop34h 13m

$848

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/24

6:50 am-3:20 pm

1 stop18h 30m

Incheon Intl

Sun 11/2

7:40 pm-12:24 am

1 stop19h 44m

$856

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/24

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sun 11/2

7:40 pm-12:24 am

1 stop19h 44m

$861

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

4:43 pm-5:40 am

2 stops21h 57m

Incheon Intl

Thu 11/27

6:00 pm-12:39 pm

2 stops33h 39m

$862

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/24

5:15 am-4:20 am

2 stops33h 05m

Incheon Intl

Sun 11/2

12:45 pm-10:54 pm

2 stops24h 09m

$941

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/6

9:15 am-5:30 pm

1 stop18h 15m

Incheon Intl

Sat 4/4

7:05 pm-3:24 pm

1 stop34h 19m

$1,089

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 10/16

6:00 am-4:50 pm

1 stop20h 50m

Incheon Intl

Thu 10/23

4:25 pm-9:28 pm

1 stop19h 03m

$1,130

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 10/9

8:53 am-5:20 pm

1 stop18h 27m

Incheon Intl

Wed 10/29

7:30 pm-11:06 pm

1 stop17h 36m

$1,542

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 January is also cheap. Prices for this month can be found on momondo for an average of $895.

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 $1,265 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 14% 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
10,000 reviews
Search Air Canada flights
DeltaPriceFrom $866Free CancellationRating
7.9
7,961 reviews
Search Delta flights
American AirlinesPriceFrom $902Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $902Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Korean AirPriceFrom $1,057Free CancellationRating
8.4
1,140 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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