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Cheap flights from Seoul to St. Louis from $627

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 2/25. 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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0 bags

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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.
American Airlines Logo
7:15 pm - 11:18 pm
ICN
-
STL
19h 03m1 stop
American Airlines Logo
7:00 am - 3:55 pm
STL
-
ICN
18h 55m1 stop
$627American Airlines
Wed, Feb 25 - Mon, Mar 9
American Airlines Logo
5:25 pm - 8:05 am
ICN
-
STL
28h 40m2 stops
American Airlines Logo
5:34 am - 3:30 pm
STL
-
ICN
19h 56m1 stop
$632American Airlines
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
5:25 pm - 8:55 am
ICN
-
STL
29h 30m1 stop
American Airlines Logo
5:34 am - 3:30 pm
STL
-
ICN
19h 56m1 stop
$634American Airlines
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m2 stops
United Airlines Logo
9:10 am - 4:20 am
STL
-
ICN
29h 10m2 stops
$659United Airlines
Mon, Apr 13 - Mon, Apr 20
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m2 stops
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m1 stop
$660United Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
8:40 pm - 5:50 am
ICN
-
STL
23h 10m1 stop
Multiple Airlines Logo
2:55 pm - 4:20 am
STL
-
ICN
23h 25m1 stop
$681Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m1 stop
Multiple Airlines Logo
4:20 pm - 4:20 am
STL
-
ICN
22h 00m1 stop
$682Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
Japan Airlines Logo
7:55 am - 11:16 pm
GMP
-
STL
29h 21m2 stops
Japan Airlines Logo
7:20 am - 9:50 pm
STL
-
GMP
24h 30m2 stops
$1,462Japan Airlines
Sat, Apr 11 - Tue, Apr 21
Japan Airlines Logo
7:55 am - 11:16 pm
GMP
-
STL
29h 21m2 stops
Japan Airlines Logo
7:20 am - 9:50 pm
STL
-
GMP
24h 30m2 stops
$1,463Japan Airlines
Sat, Apr 11 - Tue, Apr 21
ANA Logo
7:45 am - 5:43 pm
GMP
-
STL
24h 58m2 stops
ANA Logo
8:05 am - 10:30 pm
STL
-
GMP
23h 25m2 stops
$2,020ANA
Mon, Jan 12 - Fri, Jan 16

Japan Airlines flights from Seoul to St. Louis

Our best Japan Airlines deals on Seoul 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 Seoul to St. Louis

Our best American Airlines deals on Seoul 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

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 December 23, 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

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

Tue 4/14

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

9:10 am-4:20 am

2 stops29h 10m

$659

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

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

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

Mon 4/20

4:20 pm-4:20 am

1 stop22h 00m

$682

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

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 17 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 16% 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

Fastest flight time

16h 55m

Direct flights

None
The fastest flight from Seoul to St. Louis takes 16h 55m
There are no direct flights from Seoul to St. Louis. There are no popular flight routes from Seoul to St. Louis.
Search flight deals

  • 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 55m.

  • 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
11,054 reviews
Search American Airlines flights
DeltaPriceFrom $630Free CancellationRating
7.9
8,014 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
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 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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