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Cheap flights from Seoul to St. Louis from $640

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 6/18. 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
6:35 pm - 10:00 pm
ICN
-
STL
17h 25m
1 stop
American Airlines Logo
3:33 pm - 4:25 pm
STL
-
ICN
34h 52m
1 stop
$1,399American Airlines
Wed, Oct 28 - Sat, Oct 31
American Airlines Logo
6:35 pm - 10:00 pm
ICN
-
STL
17h 25m
1 stop
American Airlines Logo
6:51 pm - 4:25 pm
STL
-
ICN
31h 34m
1 stop
$1,401American Airlines
Wed, Oct 28 - Sat, Oct 31
American Airlines Logo
6:35 pm - 10:00 pm
ICN
-
STL
17h 25m
1 stop
American Airlines Logo
6:51 pm - 4:25 pm
STL
-
ICN
31h 34m
1 stop
$1,406American Airlines
Wed, Oct 28 - Sat, Oct 31
American Airlines Logo
6:35 pm - 8:03 am
ICN
-
STL
27h 28m
2 stops
American Airlines Logo
3:33 pm - 4:25 pm
STL
-
ICN
34h 52m
1 stop
$1,407American Airlines
Wed, Oct 28 - Sat, Oct 31
Qatar Airways Logo
1:20 am - 12:16 am
ICN
-
STL
36h 56m
2 stops
Qatar Airways Logo
6:02 am - 5:05 pm
STL
-
ICN
45h 03m
2 stops
$1,528Qatar Airways
Mon, Jun 22 - Tue, Jul 14
Qatar Airways Logo
1:20 am - 7:36 pm
ICN
-
STL
56h 16m
2 stops
Qatar Airways Logo
9:08 am - 5:05 pm
STL
-
ICN
41h 57m
2 stops
$1,561Qatar Airways
Mon, Jun 22 - Tue, Jul 14
Qatar Airways Logo
1:20 am - 12:16 am
ICN
-
STL
36h 56m
2 stops
Qatar Airways Logo
9:41 am - 5:05 pm
STL
-
ICN
41h 24m
2 stops
$1,571Qatar Airways
Mon, Jul 6 - Fri, Jul 10
Japan Airlines Logo
12:05 pm - 11:05 pm
GMP
-
STL
25h 00m
2 stops
Japan Airlines Logo
7:00 am - 10:05 pm
STL
-
GMP
24h 05m
2 stops
$1,840Japan Airlines
Thu, Oct 8 - Tue, Dec 15
Japan Airlines Logo
8:00 am - 11:56 pm
GMP
-
STL
29h 56m
2 stops
Japan Airlines Logo
8:36 am - 9:15 pm
STL
-
GMP
22h 39m
2 stops
$1,945Japan Airlines
Tue, Jun 23 - Tue, Jul 14
Japan Airlines Logo
8:00 am - 11:56 pm
GMP
-
STL
29h 56m
2 stops
Japan Airlines Logo
8:36 am - 9:15 pm
STL
-
GMP
22h 39m
2 stops
$1,948Japan Airlines
Tue, Jun 23 - Tue, Jul 14

Japan Airlines flights from Seoul to St. Louis

Our best Japan Airlines deals on Seoul to St. Louis flight tickets
Japan Airlines
Oct 8
GMP12:05 pmSeoul Gimpo Intl
25h 00m
2 stops
STL11:05 pmLambert-St Louis
Dec 15
STL7:00 amLambert-St Louis
24h 05m
2 stops
GMP10:05 pmSeoul Gimpo Intl
$1,840
Japan Airlines
Jun 23
GMP8:00 amSeoul Gimpo Intl
29h 56m
2 stops
STL11:56 pmLambert-St Louis
Jul 14
STL8:36 amLambert-St Louis
22h 39m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,945
Japan Airlines
Jun 23
GMP8:00 amSeoul Gimpo Intl
29h 56m
2 stops
STL11:56 pmLambert-St Louis
Jul 14
STL8:36 amLambert-St Louis
22h 39m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,948

Air Canada flights from Seoul to St. Louis

Our best Air Canada deals on Seoul to St. Louis flight tickets
Air Canada
Oct 28
ICN5:55 pmIncheon Intl
35h 35m
2 stops
STL3:30 pmLambert-St Louis
Oct 31
STL4:15 pmLambert-St Louis
34h 55m
2 stops
ICN5:10 pmIncheon Intl
$1,644
Air Canada
Oct 28
ICN5:55 pmIncheon Intl
35h 35m
2 stops
STL3:30 pmLambert-St Louis
Oct 31
STL4:15 pmLambert-St Louis
34h 55m
2 stops
ICN5:10 pmIncheon Intl
$1,646
Air Canada
Oct 28
ICN5:55 pmIncheon Intl
35h 35m
2 stops
STL3:30 pmLambert-St Louis
Oct 31
STL4:15 pmLambert-St Louis
34h 55m
2 stops
ICN5:10 pmIncheon Intl
$1,652

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 May 17, 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

Wed 10/28

6:35 pm-10:00 pm

1 stop17h 25m

Lambert-St Louis

Sat 10/31

3:33 pm-4:25 pm

1 stop34h 52m

$1,399
Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-10:00 pm

1 stop17h 25m

Lambert-St Louis

Sat 10/31

6:51 pm-4:25 pm

1 stop31h 34m

$1,401

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-10:00 pm

1 stop17h 25m

Lambert-St Louis

Sat 10/31

6:51 pm-4:25 pm

1 stop31h 34m

$1,406

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-8:03 am

2 stops27h 28m

Lambert-St Louis

Sat 10/31

3:33 pm-4:25 pm

1 stop34h 52m

$1,407

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/22

1:20 am-12:16 am

2 stops36h 56m

Lambert-St Louis

Tue 7/14

6:02 am-5:05 pm

2 stops45h 03m

$1,528

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/22

1:20 am-7:36 pm

2 stops56h 16m

Lambert-St Louis

Tue 7/14

9:08 am-5:05 pm

2 stops41h 57m

$1,561

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 7/6

1:20 am-12:16 am

2 stops36h 56m

Lambert-St Louis

Fri 7/10

9:41 am-5:05 pm

2 stops41h 24m

$1,571

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Thu 10/8

12:05 pm-11:05 pm

2 stops25h 00m

Lambert-St Louis

Tue 12/15

7:00 am-10:05 pm

2 stops24h 05m

$1,840

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Tue 6/23

8:00 am-11:56 pm

2 stops29h 56m

Lambert-St Louis

Tue 7/14

8:36 am-9:15 pm

2 stops22h 39m

$1,945

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Tue 6/23

8:00 am-11:56 pm

2 stops29h 56m

Lambert-St Louis

Tue 7/14

8:36 am-9:15 pm

2 stops22h 39m

$1,948

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

What is the cheapest month to fly to St. Louis?

In general, April is the cheapest month to fly from Seoul to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of October is another great option to travel to St. Louis, with average flight prices from Seoul averaging around $498.

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

22h 24m

Direct flights

None
The fastest flight from Seoul to St. Louis takes 22h 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 22h 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
DeltaPriceFrom $630Free CancellationRating
7.9
8,453 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
Festus
Clayton
Eureka
Litchfield
Edwardsville
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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