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

Flight times from Seoul 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 17h 28m on average. Another popular route from Seoul to St. Louis is flying from Seoul to St. Louis, which will take roughly 19h 37m. Keep in mind that layovers or delays could extend your travel time.

What is the cheapest airline that flies from Seoul to Lambert-St Louis?

American Airlines, Japan Airlines, and Qatar Airways are the most popular carriers operating from Seoul to Lambert-St Louis

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

Prices for flights from Seoul to Lambert-St Louis Airport refresh daily.

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

As of September 2025, there is 1 operator available to choose from for flights from Seoul to Lambert-St Louis Airport.

How old do you have to be to fly from Seoul 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 Seoul to Lambert-St Louis Airport.

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

The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$548 Cheap Flights from Seoul to St. Louis in 2025/26

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Find the cheapest flights from Seoul to St. Louis

Round-trip

One-way

Cheap round-trip flights

7:30 pm - 11:23 pmICN-STL

18h 53m1 stop

6:09 pm - 3:30 pmSTL-ICN

30h 21m2 stops

$635Delta

Find Deal

Thu, Nov 20 - Mon, Nov 24

6:00 pm - 9:04 amICN-STL

30h 04m1 stop

7:30 am - 4:20 pmSTL-ICN

17h 50m1 stop

$756Delta

Find Deal

Thu, Feb 12 - Mon, Feb 16

6:00 pm - 9:04 amICN-STL

30h 04m1 stop

6:30 am - 3:30 pmSTL-ICN

18h 00m1 stop

$759Delta

Find Deal

Thu, Feb 12 - Mon, Feb 16

8:35 pm - 12:03 amICN-STL

17h 28m1 stop

5:26 pm - 6:35 pmSTL-ICN

34h 09m1 stop

$905Hawaiian Airlines

Find Deal

Sat, Oct 11 - Thu, Dec 25

12:45 pm - 9:58 pmICN-STL

23h 13m2 stops

7:00 am - 5:20 amSTL-ICN

31h 20m1 stop

$927Multiple Airlines

Find Deal

Sat, Oct 11 - Thu, Dec 25

12:45 pm - 9:00 pmICN-STL

23h 15m2 stops

2:45 pm - 5:40 amSTL-ICN

23h 55m2 stops

$1,069United Airlines

Find Deal

Thu, Feb 12 - Mon, Feb 16

12:45 pm - 9:00 pmICN-STL

23h 15m2 stops

10:30 am - 5:40 amSTL-ICN

28h 10m2 stops

$1,074United Airlines

Find Deal

Thu, Feb 12 - Mon, Feb 16

6:55 pm - 3:29 pmICN-STL

35h 34m2 stops

5:24 pm - 5:10 pmSTL-ICN

32h 46m3 stops

$1,156Multiple Airlines

Find Deal

Thu, Nov 20 - Mon, Nov 24

7:50 pm - 12:21 pmGMP-STL

31h 31m2 stops

6:45 am - 10:30 pmSTL-GMP

48h 45m2 stops

$1,270ANA

Find Deal

Thu, Feb 19 - Mon, Feb 23

12:25 pm - 5:39 pmGMP-STL

44h 14m2 stops

11:05 am - 10:30 pmSTL-GMP

44h 25m2 stops

$1,272ANA

Find Deal

Thu, Nov 20 - Mon, Nov 24

United Airlines flights from Seoul to St. Louis

Our best United Airlines deals on Seoul to St. Louis flight tickets

United Airlines

Feb 12

ICN12:45 pmIncheon Intl

23h 15m

2 stops

STL9:00 pmLambert-St Louis

Feb 16

STL2:45 pmLambert-St Louis

23h 55m

2 stops

ICN5:40 amIncheon Intl

$1,069

Find similar

United Airlines

Feb 12

ICN12:45 pmIncheon Intl

23h 15m

2 stops

STL9:00 pmLambert-St Louis

Feb 16

STL10:30 amLambert-St Louis

28h 10m

2 stops

ICN5:40 amIncheon Intl

$1,074

Find similar

United Airlines

Feb 12

ICN12:45 pmIncheon Intl

36h 42m

2 stops

STL10:27 amLambert-St Louis

Feb 16

STL2:45 pmLambert-St Louis

23h 55m

2 stops

ICN5:40 amIncheon Intl

$1,101

Find similar

Delta flights from Seoul to St. Louis

Our best Delta deals on Seoul to St. Louis flight tickets

Delta

Nov 20

ICN7:30 pmIncheon Intl

18h 53m

1 stop

STL11:23 pmLambert-St Louis

Nov 24

STL6:09 pmLambert-St Louis

30h 21m

2 stops

ICN3:30 pmIncheon Intl

$635

Find similar

Delta

Feb 12

ICN6:00 pmIncheon Intl

30h 04m

1 stop

STL9:04 amLambert-St Louis

Feb 16

STL7:30 amLambert-St Louis

17h 50m

1 stop

ICN4:20 pmIncheon Intl

$756

Find similar

Delta

Feb 12

ICN6:00 pmIncheon Intl

30h 04m

1 stop

STL9:04 amLambert-St Louis

Feb 16

STL6:30 amLambert-St Louis

18h 00m

1 stop

ICN3:30 pmIncheon Intl

$759

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/20

7:30 pm-11:23 pm

1 stop18h 53m

Lambert-St Louis

Mon 11/24

6:09 pm-3:30 pm

2 stops30h 21m

$635

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

6:00 pm-9:04 am

1 stop30h 04m

Lambert-St Louis

Mon 2/16

7:30 am-4:20 pm

1 stop17h 50m

$756

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

6:00 pm-9:04 am

1 stop30h 04m

Lambert-St Louis

Mon 2/16

6:30 am-3:30 pm

1 stop18h 00m

$759

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 10/11

8:35 pm-12:03 am

1 stop17h 28m

Lambert-St Louis

Thu 12/25

5:26 pm-6:35 pm

1 stop34h 09m

$905

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 10/11

12:45 pm-9:58 pm

2 stops23h 13m

Lambert-St Louis

Thu 12/25

7:00 am-5:20 am

1 stop31h 20m

$927

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

12:45 pm-9:00 pm

2 stops23h 15m

Lambert-St Louis

Mon 2/16

2:45 pm-5:40 am

2 stops23h 55m

$1,069

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

12:45 pm-9:00 pm

2 stops23h 15m

Lambert-St Louis

Mon 2/16

10:30 am-5:40 am

2 stops28h 10m

$1,074

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/20

6:55 pm-3:29 pm

2 stops35h 34m

Lambert-St Louis

Mon 11/24

5:24 pm-5:10 pm

3 stops32h 46m

$1,156

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Thu 2/19

7:50 pm-12:21 pm

2 stops31h 31m

Lambert-St Louis

Mon 2/23

6:45 am-10:30 pm

2 stops48h 45m

$1,270

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Thu 11/20

12:25 pm-5:39 pm

2 stops44h 14m

Lambert-St Louis

Mon 11/24

11:05 am-10:30 pm

2 stops44h 25m

$1,272

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seoul 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

Airlines

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 Seoul 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.

When to book flights from Seoul to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Seoul to St. Louis according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seoul to St. Louis (SEL to STL) flight deals and tips

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

Direct flights	None

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

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How far is Seoul to Lambert-St Louis by plane?
The distance between Seoul and Lambert-St Louis is about 6661.9 mi. In terms of flight time, this usually takes a little over 15h 41m.
When did momondo last update prices for flights from Seoul to Lambert-St Louis Airport?
Prices for flights from Seoul to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Seoul to Lambert-St Louis Airport?
As of September 2025, there is 1 operator available to choose from for flights from Seoul to Lambert-St Louis Airport.
How old do you have to be to fly from Seoul 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 Seoul to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Seoul to St. Louis

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $687	Free Cancellation	Rating 7.9 7,961 reviews		Search Delta flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

O'Fallon

Fenton

Collinsville

Wentzville

Alton

St. Peters

Farmington

Festus

Glencoe

Clayton

Edwardsville

Eureka

Litchfield

Shrewsbury

Why use momondo?

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

It is quick and easy to find Seoul 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 Seoul to St. Louis with flexible booking policies on momondo?

Flights from Seoul to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

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 Seoul to St. Louis.

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

Yes. momondo can track prices for Seoul to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.