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Cheap flights from St. Louis to Seoul from $476

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Seoul departing on 10/21. 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 St. Louis to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
8:10 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
34h 16m1 stop Toronto Pearson Intl
$1,018Air Canada
Mon, Oct 5 - Wed, Nov 4
Air Canada Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
5:45 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
34h 15m2 stops Vancouver Intl Toronto Pearson Intl
$1,018Air Canada
Wed, Sep 9 - Tue, Sep 15
Asiana Airlines Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Asiana Airlines Logo
7:05 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
32h 55m1 stop Toronto Pearson Intl
$1,077Asiana Airlines
Mon, Sep 7 - Wed, Sep 16
Asiana Airlines Logo
4:05 pm - 4:10 pmSTL  Lambert-St Louis-ICN Incheon Intl
34h 05m2 stops Toronto Pearson Intl Vancouver Intl
Asiana Airlines Logo
6:55 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
35h 31m2 stops Vancouver Intl Toronto Pearson Intl
$1,082Asiana Airlines
Wed, Oct 28 - Tue, Nov 3
Delta Logo
6:15 am - 5:20 pmSTL  Lambert-St Louis-ICN Incheon Intl
21h 05m1 stop Minneapolis St Paul
Delta Logo
10:15 am - 1:06 pmICN  Incheon Intl-STL Lambert-St Louis
16h 51m1 stop Detroit Metropolitan Wayne County
$1,107Delta
Tue, Sep 8 - Thu, Sep 17
Delta Logo
5:46 pm - 4:00 amSTL  Lambert-St Louis-ICN Incheon Intl
20h 14m1 stop Atlanta Hartsfield-Jackson
Delta Logo
10:15 am - 1:06 pmICN  Incheon Intl-STL Lambert-St Louis
16h 51m1 stop Detroit Metropolitan Wayne County
$1,107Delta
Tue, Sep 8 - Tue, Sep 15
United Airlines Logo
11:15 am - 4:20 amSTL  Lambert-St Louis-ICN Incheon Intl
27h 05m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
11:30 am - 5:59 pmICN  Incheon Intl-STL Lambert-St Louis
20h 29m1 stop San Francisco
$1,112United Airlines
Tue, Sep 8 - Thu, Sep 17
United Airlines Logo
10:53 am - 4:20 amSTL  Lambert-St Louis-ICN Incheon Intl
27h 27m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
4:50 pm - 10:59 pmICN  Incheon Intl-STL Lambert-St Louis
20h 09m2 stops San Francisco Chicago O'Hare Intl
$1,112United Airlines
Mon, Sep 7 - Thu, Sep 17
Korean Air Logo
7:00 am - 3:30 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 30m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
8:35 pm - 9:25 pmICN  Incheon Intl-STL Lambert-St Louis
15h 50m1 stop Minneapolis St Paul
$1,735Korean Air
Fri, Oct 30 - Wed, Nov 4
Korean Air Logo
7:00 am - 3:30 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 30m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
8:35 pm - 9:25 pmICN  Incheon Intl-STL Lambert-St Louis
15h 50m1 stop Minneapolis St Paul
$1,735Korean Air
Fri, Oct 30 - Tue, Nov 3

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Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Oct 26
STL7:00 amLambert-St Louis
18h 30m
1 stop
ICN3:30 pmIncheon Intl
Nov 5
ICN5:40 pmIncheon Intl
21h 14m
1 stop
STL11:54 pmLambert-St Louis
$1,107
Delta
Sep 6
STL5:23 pmLambert-St Louis
30h 47m
1 stop
ICN2:10 pmIncheon Intl
Sep 17
ICN10:15 amIncheon Intl
16h 51m
1 stop
STL1:06 pmLambert-St Louis
$1,113
Delta
Oct 27
STL7:00 amLambert-St Louis
18h 30m
1 stop
ICN3:30 pmIncheon Intl
Nov 6
ICN5:40 pmIncheon Intl
17h 16m
1 stop
STL7:56 pmLambert-St Louis
$1,157

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Oct 26
STL4:39 pmLambert-St Louis
22h 01m
2 stops
ICN4:40 amIncheon Intl
Nov 4
ICN6:00 pmIncheon Intl
20h 24m
2 stops
STL11:24 pmLambert-St Louis
$1,112
United Airlines
Oct 25
STL5:00 pmLambert-St Louis
32h 25m
1 stop
ICN3:25 pmIncheon Intl
Nov 5
ICN6:30 pmIncheon Intl
18h 22m
1 stop
STL9:52 pmLambert-St Louis
$1,114
United Airlines
Oct 25
STL5:00 pmLambert-St Louis
32h 25m
1 stop
ICN3:25 pmIncheon Intl
Nov 6
ICN6:30 pmIncheon Intl
18h 30m
1 stop
STL10:00 pmLambert-St Louis
$1,164

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Seoul 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 16, 2026.
Use the filters below to find and compare flights from St. Louis to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Wed 11/4

8:10 pm-3:26 pm

1 stop34h 16m

$1,018

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Wed 9/9

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Tue 9/15

5:45 pm-2:00 pm

2 stops34h 15m

$1,018

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 9/7

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Wed 9/16

7:05 pm-2:00 pm

1 stop32h 55m

$1,077

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Wed 10/28

4:05 pm-4:10 pm

2 stops34h 05m

Incheon Intl

Tue 11/3

6:55 pm-3:26 pm

2 stops35h 31m

$1,082

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 9/8

6:15 am-5:20 pm

1 stop21h 05m

Incheon Intl

Thu 9/17

10:15 am-1:06 pm

1 stop16h 51m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 9/8

5:46 pm-4:00 am

1 stop20h 14m

Incheon Intl

Tue 9/15

10:15 am-1:06 pm

1 stop16h 51m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 9/8

11:15 am-4:20 am

2 stops27h 05m

Incheon Intl

Thu 9/17

11:30 am-5:59 pm

1 stop20h 29m

$1,112

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 9/7

10:53 am-4:20 am

2 stops27h 27m

Incheon Intl

Thu 9/17

4:50 pm-10:59 pm

2 stops20h 09m

$1,112
Quickest round-trip

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Fri 10/30

7:00 am-3:30 pm

1 stop18h 30m

Incheon Intl

Wed 11/4

8:35 pm-9:25 pm

1 stop15h 50m

$1,735

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Fri 10/30

7:00 am-3:30 pm

1 stop18h 30m

Incheon Intl

Tue 11/3

8:35 pm-9:25 pm

1 stop15h 50m

$1,735

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 Seoul from

How to get the cheapest flight ticket from St. Louis to Seoul

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 Seoul?

The month of April is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $904.

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

You could potentially save up to 43% on your flight if you consider stops on a St. Louis to Seoul flight.

When to book flights from St. Louis to Seoul

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Seoul according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Seoul (STL to SEL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Seoul

Fastest flight time

18h 34m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 34m
There are no direct flights from St. Louis to Seoul. There are no popular flight routes from St. Louis to Seoul.
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Frequently asked questions about flying from St. Louis to Seoul

  • How far is Lambert-St Louis to Seoul by plane?

    The distance between Lambert-St Louis and Seoul is about 6661.9 mi. 18h 34m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Seoul?

    Prices for flights from Lambert-St Louis Airport to Seoul are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Seoul?

  • How old do you have to be to fly from Lambert-St Louis Airport to Seoul?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Seoul.

  • What documentation or ID do you need to fly to Seoul?

    The required travel and health documents for your Seoul trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seoul. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from St. Louis to Seoul?

Best airlines flying from St. Louis to Seoul

Compare and see reviews for airlines that fly from St. Louis to Seoul with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $846Free CancellationRating
7.8
8,502 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
10,105 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
Air CanadaPriceFrom $1,083Free CancellationRating
7.1
11,479 reviews
Search Air Canada flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Seoul?

Finding the right flight to Seoul from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seoul quick and easy, saving you time and money.

Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seoul from St. Louis which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from St. Louis to Seoul?

momondo provides multiple filters to help you find the best flight to Seoul from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?

Price alerts on flights to Seoul from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to South Korea

Fly into one of these airports located in Seoul

Airports listed have a maximum distance of 30.3 mi from Seoul
Seoul Gimpo Intl Airport
Incheon Intl Airport