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Cheap flights from Seoul to St. Louis from $932

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 9/29. 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

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
5:50 pm - 11:43 pmICN  Incheon Intl-STL Lambert-St Louis
19h 53m1 stop Dallas/Fort Worth
American Airlines Logo
5:40 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
20h 05m1 stop Dallas/Fort Worth
$932American Airlines
Tue, Sep 29 - Tue, Oct 6
American Airlines Logo
5:50 pm - 12:27 amICN  Incheon Intl-STL Lambert-St Louis
20h 37m2 stops Dallas/Fort Worth Chicago O'Hare Intl
American Airlines Logo
6:32 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 13m1 stop Dallas/Fort Worth
$936American Airlines
Tue, Sep 29 - Tue, Oct 6
American Airlines Logo
5:50 pm - 12:19 amICN  Incheon Intl-STL Lambert-St Louis
20h 29m2 stops Dallas/Fort Worth Chicago O'Hare Intl
American Airlines Logo
5:40 am - 4:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
21h 05m1 stop Dallas/Fort Worth
$979American Airlines
Tue, Oct 20 - Sun, Oct 25
American Airlines Logo
5:50 pm - 12:15 pmICN  Incheon Intl-STL Lambert-St Louis
32h 25m1 stop Dallas/Fort Worth
American Airlines Logo
10:45 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
39h 00m2 stops Washington, D.C. Reagan-National Dallas/Fort Worth
$981American Airlines
Thu, Sep 17 - Sun, Sep 20
American Airlines Logo
5:50 pm - 12:15 pmICN  Incheon Intl-STL Lambert-St Louis
32h 25m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
43h 45m2 stops Washington, D.C. Reagan-National Dallas/Fort Worth
$983American Airlines
Thu, Sep 17 - Sun, Sep 20
American Airlines Logo
5:50 pm - 12:15 pmICN  Incheon Intl-STL Lambert-St Louis
32h 25m1 stop Dallas/Fort Worth
American Airlines Logo
10:45 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
39h 00m2 stops Washington, D.C. Reagan-National Dallas/Fort Worth
$984American Airlines
Thu, Sep 17 - Sun, Sep 20
American Airlines Logo
5:50 pm - 10:41 pmICN  Incheon Intl-STL Lambert-St Louis
18h 51m1 stop Dallas/Fort Worth
American Airlines Logo
5:43 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
20h 02m1 stop Dallas/Fort Worth
$985American Airlines
Thu, Sep 3 - Sat, Sep 19
American Airlines Logo
5:50 pm - 12:14 amICN  Incheon Intl-STL Lambert-St Louis
20h 24m2 stops Dallas/Fort Worth Chicago O'Hare Intl
American Airlines Logo
5:00 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
20h 45m2 stops Chicago O'Hare Intl Dallas/Fort Worth
$989American Airlines
Thu, Sep 3 - Sat, Sep 19
Air Canada Logo
5:45 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
34h 15m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
12:10 pm - 4:05 pmSTL  Lambert-St Louis-ICN Incheon Intl
37h 55m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$1,029Air Canada
Tue, Sep 29 - Tue, Oct 6
Air Canada Logo
7:05 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
32h 55m1 stop Toronto Pearson Intl
Air Canada Logo
4:05 pm - 5:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
35h 20m1 stop Toronto Pearson Intl
$1,054Air Canada
Tue, Oct 20 - Sun, Oct 25

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United Airlines flights from Seoul to St. Louis

Our best United Airlines deals on Seoul to St. Louis flight tickets
United Airlines
Sep 17
ICN11:30 amIncheon Intl
23h 08m
2 stops
STL8:38 pmLambert-St Louis
Sep 20
STL12:59 pmLambert-St Louis
25h 21m
2 stops
ICN4:20 amIncheon Intl
$1,123
United Airlines
Sep 17
ICN4:50 pmIncheon Intl
20h 09m
2 stops
STL10:59 pmLambert-St Louis
Sep 20
STL6:55 pmLambert-St Louis
19h 25m
2 stops
ICN4:20 amIncheon Intl
$1,125
United Airlines
Sep 17
ICN11:30 amIncheon Intl
23h 08m
2 stops
STL8:38 pmLambert-St Louis
Sep 20
STL12:59 pmLambert-St Louis
25h 21m
2 stops
ICN4:20 amIncheon Intl
$1,126

Japan Airlines flights from Seoul to St. Louis

Our best Japan Airlines deals on Seoul to St. Louis flight tickets
Japan Airlines
Sep 3
GMP8:00 amSeoul Gimpo Intl
28h 59m
2 stops
STL10:59 pmLambert-St Louis
Sep 7
STL9:32 amLambert-St Louis
21h 43m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,240
Japan Airlines
Sep 3
GMP8:00 amSeoul Gimpo Intl
28h 59m
2 stops
STL10:59 pmLambert-St Louis
Sep 7
STL9:32 amLambert-St Louis
21h 43m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,242
Japan Airlines
Sep 3
GMP8:00 amSeoul Gimpo Intl
28h 59m
2 stops
STL10:59 pmLambert-St Louis
Sep 7
STL9:32 amLambert-St Louis
21h 43m
2 stops
GMP9:15 pmSeoul Gimpo Intl
$1,243

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 August 18, 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 Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Tue 9/29

5:50 pm-11:43 pm

1 stop19h 53m

Lambert-St Louis

Tue 10/6

5:40 am-3:45 pm

1 stop20h 05m

$932

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Tue 9/29

5:50 pm-12:27 am

2 stops20h 37m

Lambert-St Louis

Tue 10/6

6:32 am-3:45 pm

1 stop19h 13m

$936

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Tue 10/20

5:50 pm-12:19 am

2 stops20h 29m

Lambert-St Louis

Sun 10/25

5:40 am-4:45 pm

1 stop21h 05m

$979

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Thu 9/17

5:50 pm-12:15 pm

1 stop32h 25m

Lambert-St Louis

Sun 9/20

10:45 am-3:45 pm

2 stops39h 00m

$981

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Thu 9/17

5:50 pm-12:15 pm

1 stop32h 25m

Lambert-St Louis

Sun 9/20

6:00 am-3:45 pm

2 stops43h 45m

$983

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Thu 9/17

5:50 pm-12:15 pm

1 stop32h 25m

Lambert-St Louis

Sun 9/20

10:45 am-3:45 pm

2 stops39h 00m

$984
Quickest round-trip

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Thu 9/3

5:50 pm-10:41 pm

1 stop18h 51m

Lambert-St Louis

Sat 9/19

5:43 am-3:45 pm

1 stop20h 02m

$985

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Thu 9/3

5:50 pm-12:14 am

2 stops20h 24m

Lambert-St Louis

Sat 9/19

5:00 am-3:45 pm

2 stops20h 45m

$989

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Tue 9/29

5:45 pm-2:00 pm

2 stops34h 15m

Lambert-St Louis

Tue 10/6

12:10 pm-4:05 pm

2 stops37h 55m

$1,029

IncheonSt. Louis

ICN Incheon Intl - STL Lambert-St Louis

ICNSTL

Incheon Intl

Tue 10/20

7:05 pm-2:00 pm

1 stop32h 55m

Lambert-St Louis

Sun 10/25

4:05 pm-5:25 pm

1 stop35h 20m

$1,054

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, August 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 April is another great option to travel to St. Louis, with average flight prices from Seoul averaging around $0.

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

You could potentially save up to 10% 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

Best Price Found

$2,076

Fastest flight time

20h 09m

Direct flights

None
The best one-way flight to St. Louis from Seoul in the past 72 hours is $2,076. The best round-trip flight deal from Seoul to St. Louis found on momondo in the last 72 hours is $932.
The fastest flight from Seoul to St. Louis takes 20h 09m
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 20h 09m.

  • 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 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.

Traveling to a place near St. Louis?

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