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Cheap flights from Seoul to St. Louis from $544

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to St. Louis departing on 5/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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.
Delta Logo
7:20 pm - 12:30 am
ICN
-
STL
19h 10m
1 stop
Delta Logo
1:22 pm - 4:00 am
STL
-
ICN
24h 38m
1 stop
$990Delta
Thu, May 14 - Thu, Jul 30
Alaska Airlines Logo
7:35 pm - 11:59 pm
ICN
-
STL
18h 24m
1 stop
Alaska Airlines Logo
7:00 am - 5:30 pm
STL
-
ICN
20h 30m
1 stop
$1,041Alaska Airlines
Sat, Apr 25 - Wed, Apr 29
Delta Logo
4:40 pm - 12:30 am
ICN
-
STL
21h 50m
2 stops
Delta Logo
6:58 pm - 4:00 am
STL
-
ICN
19h 02m
1 stop
$1,056Delta
Thu, May 14 - Thu, Jul 30
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m
1 stop
Multiple Airlines Logo
3:50 pm - 5:15 am
STL
-
ICN
23h 25m
1 stop
$1,114Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m
1 stop
Multiple Airlines Logo
3:50 pm - 5:15 am
STL
-
ICN
23h 25m
1 stop
$1,115Multiple Airlines
Tue, Apr 14 - Tue, Apr 21
Air Canada Logo
5:45 pm - 9:13 pm
ICN
-
STL
41h 28m
2 stops
Air Canada Logo
7:05 am - 4:05 pm
STL
-
ICN
43h 00m
2 stops
$1,217Air Canada
Wed, May 6 - Sat, May 9
Korean Air Logo
7:20 pm - 12:25 am
ICN
-
STL
19h 05m
1 stop
Korean Air Logo
9:26 am - 5:20 pm
STL
-
ICN
17h 54m
1 stop
$1,224Korean Air
Mon, Apr 13 - Sun, Apr 19
Air Canada Logo
5:45 pm - 8:09 pm
ICN
-
STL
40h 24m
2 stops
Air Canada Logo
7:05 am - 4:05 pm
STL
-
ICN
43h 00m
2 stops
$1,233Air Canada
Tue, May 5 - Sat, May 9
Japan Airlines Logo
8:00 am - 11:59 pm
GMP
-
STL
29h 59m
2 stops
Japan Airlines Logo
6:36 am - 9:15 pm
STL
-
GMP
24h 39m
2 stops
$1,299Japan Airlines
Thu, May 14 - Thu, Jul 30
Japan Airlines Logo
12:05 pm - 11:57 pm
GMP
-
STL
25h 52m
2 stops
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
$1,423Japan Airlines
Sat, Apr 25 - Thu, Apr 30

American Airlines flights from Seoul to St. Louis

Our best American Airlines deals on Seoul to St. Louis flight tickets
American Airlines
May 6
ICN5:50 pmIncheon Intl
19h 09m
1 stop
STL10:59 pmLambert-St Louis
May 9
STL6:11 pmLambert-St Louis
31h 34m
1 stop
ICN3:45 pmIncheon Intl
$1,336
American Airlines
Jun 20
ICN5:50 pmIncheon Intl
20h 09m
1 stop
STL11:59 pmLambert-St Louis
Jul 5
STL7:26 pmLambert-St Louis
30h 19m
1 stop
ICN3:45 pmIncheon Intl
$1,427
American Airlines
Apr 14
ICN5:50 pmIncheon Intl
28h 40m
2 stops
STL8:30 amLambert-St Louis
Apr 21
STL5:20 amLambert-St Louis
20h 25m
1 stop
ICN3:45 pmIncheon Intl
$1,738

Korean Air flights from Seoul to St. Louis

Our best Korean Air deals on Seoul to St. Louis flight tickets
Korean Air
Apr 13
ICN7:20 pmIncheon Intl
19h 05m
1 stop
STL12:25 amLambert-St Louis
Apr 19
STL9:26 amLambert-St Louis
17h 54m
1 stop
ICN5:20 pmIncheon Intl
$1,224
Korean Air
Apr 13
ICN7:20 pmIncheon Intl
19h 05m
1 stop
STL12:25 amLambert-St Louis
Apr 19
STL9:26 amLambert-St Louis
17h 54m
1 stop
ICN5:20 pmIncheon Intl
$1,299
Korean Air
May 5
ICN7:40 pmIncheon Intl
17h 33m
1 stop
STL11:13 pmLambert-St Louis
May 9
STL7:00 amLambert-St Louis
18h 20m
1 stop
ICN3:20 pmIncheon Intl
$1,320

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 April 3, 2026.
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

Cheapest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 5/14

7:20 pm-12:30 am

1 stop19h 10m

Lambert-St Louis

Thu 7/30

1:22 pm-4:00 am

1 stop24h 38m

$990

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 4/25

7:35 pm-11:59 pm

1 stop18h 24m

Lambert-St Louis

Wed 4/29

7:00 am-5:30 pm

1 stop20h 30m

$1,041

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 5/14

4:40 pm-12:30 am

2 stops21h 50m

Lambert-St Louis

Thu 7/30

6:58 pm-4:00 am

1 stop19h 02m

$1,056

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

Tue 4/21

3:50 pm-5:15 am

1 stop23h 25m

$1,114

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

Tue 4/21

3:50 pm-5:15 am

1 stop23h 25m

$1,115

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 5/6

5:45 pm-9:13 pm

2 stops41h 28m

Lambert-St Louis

Sat 5/9

7:05 am-4:05 pm

2 stops43h 00m

$1,217
Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

7:20 pm-12:25 am

1 stop19h 05m

Lambert-St Louis

Sun 4/19

9:26 am-5:20 pm

1 stop17h 54m

$1,224

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 5/5

5:45 pm-8:09 pm

2 stops40h 24m

Lambert-St Louis

Sat 5/9

7:05 am-4:05 pm

2 stops43h 00m

$1,233

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Thu 5/14

8:00 am-11:59 pm

2 stops29h 59m

Lambert-St Louis

Thu 7/30

6:36 am-9:15 pm

2 stops24h 39m

$1,299

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/25

12:05 pm-11:57 pm

2 stops25h 52m

Lambert-St Louis

Thu 4/30

8:54 am-9:15 pm

2 stops22h 21m

$1,423

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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

You could potentially save up to 1% 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

17h 24m

Direct flights

None
The fastest flight from Seoul to St. Louis takes 17h 24m
There are no direct flights from Seoul to St. Louis. There are no popular flight routes from Seoul to St. Louis.
Search flight deals

Frequently asked questions about flying from Seoul to St. Louis

  • 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 17h 24m.

  • 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
7.1
11,555 reviews
Search American Airlines flights
DeltaPriceFrom $630Free CancellationRating
7.9
8,377 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
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Clayton
Festus
Eureka
Edwardsville
Litchfield
Shrewsbury
Grafton

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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