How long does it take to fly to St. Louis?

Flight times from South Korea to St. Louis vary, but if you’re flying out of Incheon and flying into St. Louis (one of the most popular routes), then the duration is 16h 55m on average. Another popular route from South Korea to St. Louis is flying from Busan to St. Louis, which will take roughly 20h 25m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from South Korea to Lambert-St Louis Airport?

Prices for flights from South Korea to Lambert-St Louis Airport are refreshed on a daily basis.

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

As of December 2025, there are 2 operators available to choose from for flights from South Korea to Lambert-St Louis Airport.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Korea to Lambert-St Louis Airport.

What documentation or ID do you need to fly to Lambert-St Louis Airport?

The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$627 Cheap Flights from South Korea to St. Louis in 2025/26

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Find the cheapest flights from South Korea to St. Louis

Round-trip

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Recent round-trip flight deals from South Korea to St. Louis

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7:15 pm - 11:18 pm

ICN

STL

19h 03m1 stop

7:00 am - 3:55 pm

STL

ICN

18h 55m1 stop

$627American Airlines

Wed, Feb 25 - Mon, Mar 9

5:25 pm - 8:05 am

ICN

STL

28h 40m2 stops

5:34 am - 3:30 pm

STL

ICN

19h 56m1 stop

$632American Airlines

Tue, Apr 14 - Tue, Apr 21

5:25 pm - 8:55 am

ICN

STL

29h 30m1 stop

5:34 am - 3:30 pm

STL

ICN

19h 56m1 stop

$634American Airlines

Mon, Apr 13 - Tue, Apr 21

4:50 pm - 9:25 am

ICN

STL

30h 35m2 stops

8:30 am - 4:20 am

STL

ICN

29h 50m1 stop

$660United Airlines

Mon, Apr 13 - Mon, Apr 20

4:50 pm - 9:25 am

ICN

STL

30h 35m2 stops

4:49 pm - 4:20 am

STL

ICN

21h 31m2 stops

$674United Airlines

Tue, Apr 14 - Tue, Apr 21

8:40 pm - 5:50 am

ICN

STL

23h 10m1 stop

2:55 pm - 4:20 am

STL

ICN

23h 25m1 stop

$681Multiple Airlines

Mon, Apr 13 - Mon, Apr 20

7:55 am - 11:16 pm

GMP

STL

29h 21m2 stops

7:20 am - 9:50 pm

STL

GMP

24h 30m2 stops

$1,462Japan Airlines

Sat, Apr 11 - Tue, Apr 21

7:55 am - 11:16 pm

GMP

STL

29h 21m2 stops

7:20 am - 9:50 pm

STL

GMP

24h 30m2 stops

$1,463Japan Airlines

Sat, Apr 11 - Tue, Apr 21

7:55 am - 2:03 pm

GMP

STL

20h 08m2 stops

7:20 am - 9:50 pm

STL

GMP

24h 30m2 stops

$1,519Multiple Airlines

Sat, Apr 11 - Tue, Apr 21

7:45 am - 5:43 pm

GMP

STL

24h 58m2 stops

8:05 am - 10:30 pm

STL

GMP

23h 25m2 stops

$2,020ANA

Mon, Jan 12 - Fri, Jan 16

Japan Airlines flights from South Korea to St. Louis

Our best Japan Airlines deals on South Korea to St. Louis flight tickets

Japan Airlines

Apr 11

GMP7:55 amSeoul Gimpo Intl

29h 21m

2 stops

STL11:16 pmLambert-St Louis

Apr 21

STL7:20 amLambert-St Louis

24h 30m

2 stops

GMP9:50 pmSeoul Gimpo Intl

$1,462

Find similar

Japan Airlines

Apr 11

GMP7:55 amSeoul Gimpo Intl

29h 21m

2 stops

STL11:16 pmLambert-St Louis

Apr 21

STL7:20 amLambert-St Louis

24h 30m

2 stops

GMP9:50 pmSeoul Gimpo Intl

$1,463

Find similar

American Airlines flights from South Korea to St. Louis

Our best American Airlines deals on South Korea to St. Louis flight tickets

American Airlines

Feb 25

ICN7:15 pmIncheon Intl

19h 03m

1 stop

STL11:18 pmLambert-St Louis

Mar 9

STL7:00 amLambert-St Louis

18h 55m

1 stop

ICN3:55 pmIncheon Intl

$627

Find similar

American Airlines

Apr 14

ICN5:25 pmIncheon Intl

28h 40m

2 stops

STL8:05 amLambert-St Louis

Apr 21

STL5:34 amLambert-St Louis

19h 56m

1 stop

ICN3:30 pmIncheon Intl

$632

Find similar

American Airlines

Apr 13

ICN5:25 pmIncheon Intl

29h 30m

1 stop

STL8:55 amLambert-St Louis

Apr 21

STL5:34 amLambert-St Louis

19h 56m

1 stop

ICN3:30 pmIncheon Intl

$634

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 2/25

7:15 pm-11:18 pm

1 stop19h 03m

Lambert-St Louis

Mon 3/9

7:00 am-3:55 pm

1 stop18h 55m

$627

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

5:25 pm-8:05 am

2 stops28h 40m

Lambert-St Louis

Tue 4/21

5:34 am-3:30 pm

1 stop19h 56m

$632

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

5:25 pm-8:55 am

1 stop29h 30m

Lambert-St Louis

Tue 4/21

5:34 am-3:30 pm

1 stop19h 56m

$634

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

4:50 pm-9:25 am

2 stops30h 35m

Lambert-St Louis

Mon 4/20

8:30 am-4:20 am

1 stop29h 50m

$660

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

4:50 pm-9:25 am

2 stops30h 35m

Lambert-St Louis

Tue 4/21

4:49 pm-4:20 am

2 stops21h 31m

$674

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

8:40 pm-5:50 am

1 stop23h 10m

Lambert-St Louis

Mon 4/20

2:55 pm-4:20 am

1 stop23h 25m

$681

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/11

7:55 am-11:16 pm

2 stops29h 21m

Lambert-St Louis

Tue 4/21

7:20 am-9:50 pm

2 stops24h 30m

$1,462

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/11

7:55 am-11:16 pm

2 stops29h 21m

Lambert-St Louis

Tue 4/21

7:20 am-9:50 pm

2 stops24h 30m

$1,463

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/11

7:55 am-2:03 pm

2 stops20h 08m

Lambert-St Louis

Tue 4/21

7:20 am-9:50 pm

2 stops24h 30m

$1,519

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Mon 1/12

7:45 am-5:43 pm

2 stops24h 58m

Lambert-St Louis

Fri 1/16

8:05 am-10:30 pm

2 stops23h 25m

$2,020

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

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

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

Prices

Other information

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $1,203. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,719. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from South Korea in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,112 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,719 per ticket.

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

You could potentially save up to 16% on your flight if you consider stops on a South Korea to St. Louis flight.

Cheap South Korea to St. Louis flight deals and tips

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

Fastest flight time	16h 55m
Direct flights	None

The fastest flight from South Korea to St. Louis takes 16h 55m

There are no direct flights from South Korea to St. Louis. There are no popular flight routes from South Korea to St. Louis.

Search flight deals

When did momondo last update prices for flights from South Korea to Lambert-St Louis Airport?
Prices for flights from South Korea to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from South Korea to Lambert-St Louis Airport?
As of December 2025, there are 2 operators available to choose from for flights from South Korea to Lambert-St Louis Airport.
How old do you have to be to fly from South Korea to Lambert-St Louis Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from South Korea to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from South Korea to St. Louis

Compare and see reviews for airlines that fly from South Korea to St. Louis with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $568	Free Cancellation	Rating 7.2 11,054 reviews		Search American Airlines flights
Delta	PriceFrom $630	Free Cancellation	Rating 7.9 8,014 reviews		Search Delta flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Maryland Heights

O'Fallon

Florissant

Fenton

St. Peters

Wentzville

Collinsville

Alton

Farmington

Clayton

Festus

Glencoe

Eureka

Edwardsville

Litchfield

Shrewsbury

Why use momondo?

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

It is quick and easy to find South Korea to St. Louis flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to St. Louis that suits you.

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

All flight searches from South Korea to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

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

momondo provides multiple filters to help you find the best flight to St. Louis from South Korea. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from South Korea to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.