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Cheap flights from Seoul to St. Louis from $623

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to St. Louis departing on 4/14. 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 Seoul to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:20 pm - 12:36 amICN-STL
19h 16m2 stops
Delta Logo
6:30 am - 4:30 pmSTL-ICN
20h 00m2 stops
$623Delta
Find Deal
Tue, Apr 14 - Tue, Apr 21
Delta Logo
7:20 pm - 12:36 amICN-STL
19h 16m2 stops
Delta Logo
6:30 am - 4:30 pmSTL-ICN
20h 00m2 stops
$624Delta
Find Deal
Tue, Apr 14 - Tue, Apr 21
Delta Logo
6:50 pm - 11:38 pmICN-STL
18h 48m1 stop
Delta Logo
5:30 pm - 5:20 pmSTL-ICN
33h 50m1 stop
$638Delta
Find Deal
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
11:30 am - 5:53 pmICN-STL
20h 23m1 stop
United Airlines Logo
7:06 pm - 4:20 amSTL-ICN
19h 14m1 stop
$661United Airlines
Find Deal
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
12:45 pm - 9:00 pmICN-STL
23h 15m2 stops
United Airlines Logo
1:30 pm - 4:20 amSTL-ICN
24h 50m2 stops
$704United Airlines
Find Deal
Sat, Feb 28 - Wed, Apr 1
Multiple Airlines Logo
10:40 am - 2:26 pmICN-STL
17h 46m1 stop
Multiple Airlines Logo
8:50 am - 5:20 pmSTL-ICN
18h 30m1 stop
$712Multiple Airlines
Find Deal
Mon, Apr 13 - Sun, Apr 19
Multiple Airlines Logo
10:40 am - 3:21 pmICN-STL
18h 41m1 stop
Multiple Airlines Logo
8:50 am - 5:20 pmSTL-ICN
18h 30m1 stop
$760Multiple Airlines
Find Deal
Sat, Apr 11 - Tue, Apr 21
American Airlines Logo
7:15 pm - 11:44 pmICN-STL
19h 29m2 stops
American Airlines Logo
6:44 pm - 4:45 pmSTL-ICN
31h 01m1 stop
$789American Airlines
Find Deal
Sun, Dec 21 - Sun, Dec 28
American Airlines Logo
6:50 pm - 12:27 pmICN-STL
32h 37m2 stops
American Airlines Logo
6:59 pm - 4:45 pmSTL-ICN
30h 46m2 stops
$803American Airlines
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Thu, Feb 12 - Mon, Feb 16
Japan Airlines Logo
7:55 am - 2:26 pmGMP-STL
20h 31m2 stops
Japan Airlines Logo
7:20 am - 6:00 pmSTL-GMP
20h 40m2 stops
$1,213Japan Airlines
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Sat, Apr 11 - Tue, Apr 21

ANA flights from Seoul to St. Louis

Our best ANA deals on Seoul to St. Louis flight tickets
ANA
Feb 19
GMP7:50 pmSeoul Gimpo Intl
29h 46m
2 stops
STL10:36 amLambert-St Louis
Feb 23
STL6:30 amLambert-St Louis
37h 50m
2 stops
GMP11:20 amSeoul Gimpo Intl
$1,233
Find similar
ANA
Feb 19
GMP7:50 pmSeoul Gimpo Intl
29h 46m
2 stops
STL10:36 amLambert-St Louis
Feb 23
STL7:41 amLambert-St Louis
43h 54m
2 stops
GMP6:35 pmSeoul Gimpo Intl
$1,235
Find similar
ANA
Feb 19
GMP7:50 pmSeoul Gimpo Intl
31h 35m
2 stops
STL12:25 pmLambert-St Louis
Feb 23
STL7:41 amLambert-St Louis
36h 39m
2 stops
GMP11:20 amSeoul Gimpo Intl
$1,244
Find similar

Delta flights from Seoul to St. Louis

Our best Delta deals on Seoul to St. Louis flight tickets
Delta
Apr 14
ICN7:20 pmIncheon Intl
19h 16m
2 stops
STL12:36 amLambert-St Louis
Apr 21
STL6:30 amLambert-St Louis
20h 00m
2 stops
ICN4:30 pmIncheon Intl
$623
Find similar
Delta
Apr 14
ICN7:20 pmIncheon Intl
19h 16m
2 stops
STL12:36 amLambert-St Louis
Apr 21
STL6:30 amLambert-St Louis
20h 00m
2 stops
ICN4:30 pmIncheon Intl
$624
Find similar
Delta
Apr 14
ICN6:50 pmIncheon Intl
18h 48m
1 stop
STL11:38 pmLambert-St Louis
Apr 21
STL5:30 pmLambert-St Louis
33h 50m
1 stop
ICN5:20 pmIncheon Intl
$638
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to St. Louis 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 November 6, 2025.
Use the filters below to find and compare flights from Seoul to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

7:20 pm-12:36 am

2 stops19h 16m

Lambert-St Louis

Tue 4/21

6:30 am-4:30 pm

2 stops20h 00m

$623

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

7:20 pm-12:36 am

2 stops19h 16m

Lambert-St Louis

Tue 4/21

6:30 am-4:30 pm

2 stops20h 00m

$624

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

6:50 pm-11:38 pm

1 stop18h 48m

Lambert-St Louis

Tue 4/21

5:30 pm-5:20 pm

1 stop33h 50m

$638

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

11:30 am-5:53 pm

1 stop20h 23m

Lambert-St Louis

Tue 4/21

7:06 pm-4:20 am

1 stop19h 14m

$661

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 2/28

12:45 pm-9:00 pm

2 stops23h 15m

Lambert-St Louis

Wed 4/1

1:30 pm-4:20 am

2 stops24h 50m

$704

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

10:40 am-2:26 pm

1 stop17h 46m

Lambert-St Louis

Sun 4/19

8:50 am-5:20 pm

1 stop18h 30m

$712

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 4/11

10:40 am-3:21 pm

1 stop18h 41m

Lambert-St Louis

Tue 4/21

8:50 am-5:20 pm

1 stop18h 30m

$760

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 12/21

7:15 pm-11:44 pm

2 stops19h 29m

Lambert-St Louis

Sun 12/28

6:44 pm-4:45 pm

1 stop31h 01m

$789

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 2/12

6:50 pm-12:27 pm

2 stops32h 37m

Lambert-St Louis

Mon 2/16

6:59 pm-4:45 pm

2 stops30h 46m

$803

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/11

7:55 am-2:26 pm

2 stops20h 31m

Lambert-St Louis

Tue 4/21

7:20 am-6:00 pm

2 stops20h 40m

$1,213

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 11 resultsSorted by cheapest first
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See travel insights to St. Louis from

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

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.

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

You could potentially save up to 22% on your flight if you consider stops on a Seoul to St. Louis flight.

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 16h 54m.

  • 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?

  • 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
American AirlinesPriceFrom $568Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
DeltaPriceFrom $630Free CancellationRating
7.9
8,001 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Florissant
Maryland Heights
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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.

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