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Cheap flights from St. Louis to Seoul from $508

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 9/11. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
2:30 pm - 4:00 am
STL
-
ICN
23h 30m
1 stop
Delta Logo
9:35 am - 8:41 pm
ICN
-
STL
26h 06m
1 stop
$1,106Delta
Mon, Oct 5 - Wed, Nov 4
United Airlines Logo
4:40 pm - 4:20 am
STL
-
ICN
21h 40m
2 stops
United Airlines Logo
11:30 am - 6:39 pm
ICN
-
STL
21h 09m
1 stop
$1,107United Airlines
Wed, Aug 26 - Wed, Sep 2
American Airlines Logo
5:40 am - 3:45 pm
STL
-
ICN
20h 05m
1 stop
American Airlines Logo
6:50 pm - 11:33 pm
ICN
-
STL
19h 43m
1 stop
$1,107American Airlines
Tue, Oct 13 - Mon, Nov 2
American Airlines Logo
8:36 am - 3:45 pm
STL
-
ICN
17h 09m
1 stop
American Airlines Logo
5:50 pm - 11:42 pm
ICN
-
STL
19h 52m
1 stop
$1,107American Airlines
Tue, Aug 25 - Tue, Sep 1
Delta Logo
6:47 am - 4:50 pm
STL
-
ICN
20h 03m
1 stop
Delta Logo
9:35 am - 1:23 pm
ICN
-
STL
18h 48m
1 stop
$1,107Delta
Mon, Oct 26 - Wed, Nov 25
United Airlines Logo
5:30 pm - 4:20 am
STL
-
ICN
20h 50m
2 stops
United Airlines Logo
5:15 pm - 11:38 pm
ICN
-
STL
20h 23m
1 stop
$1,107United Airlines
Mon, Sep 7 - Tue, Sep 15
Delta Logo
9:47 am - 5:20 pm
STL
-
ICN
17h 33m
1 stop
Delta Logo
7:25 pm - 11:54 pm
ICN
-
STL
19h 29m
1 stop
$1,107Delta
Tue, Oct 13 - Mon, Nov 2
United Airlines Logo
4:40 pm - 4:20 am
STL
-
ICN
21h 40m
2 stops
United Airlines Logo
5:15 pm - 11:38 pm
ICN
-
STL
20h 23m
1 stop
$1,107United Airlines
Mon, Sep 7 - Tue, Sep 15
American Airlines Logo
6:36 am - 3:45 pm
STL
-
ICN
19h 09m
1 stop
American Airlines Logo
5:50 pm - 11:43 pm
ICN
-
STL
19h 53m
1 stop
$1,107American Airlines
Mon, Sep 7 - Tue, Sep 15
Korean Air Logo
9:15 am - 5:50 pm
STL
-
ICN
18h 35m
1 stop
Korean Air Logo
8:45 am - 4:17 pm
ICN
-
STL
21h 32m
1 stop
$24,168Korean Air
Wed, Aug 26 - Wed, Sep 2

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Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Oct 5
STL2:30 pmLambert-St Louis
23h 30m
1 stop
ICN4:00 amIncheon Intl
Nov 4
ICN9:35 amIncheon Intl
26h 06m
1 stop
STL8:41 pmLambert-St Louis
$1,106
Delta
Aug 3
STL9:15 amLambert-St Louis
28h 45m
1 stop
ICN4:00 amIncheon Intl
Aug 21
ICN7:20 pmIncheon Intl
19h 21m
1 stop
STL12:41 amLambert-St Louis
$1,107
Delta
Aug 10
STL5:23 pmLambert-St Louis
20h 37m
1 stop
ICN4:00 amIncheon Intl
Aug 24
ICN7:00 pmIncheon Intl
27h 37m
2 stops
STL8:37 amLambert-St Louis
$1,111

American Airlines flights from St. Louis to Seoul

Our best American Airlines deals on St. Louis to Seoul flight tickets
American Airlines
Oct 4
STL3:34 pmLambert-St Louis
34h 11m
1 stop
ICN3:45 pmIncheon Intl
Oct 25
ICN6:50 pmIncheon Intl
19h 08m
2 stops
STL11:58 pmLambert-St Louis
$1,167
American Airlines
Oct 16
STL5:40 amLambert-St Louis
20h 05m
1 stop
ICN3:45 pmIncheon Intl
Oct 25
ICN6:50 pmIncheon Intl
17h 09m
1 stop
STL9:59 pmLambert-St Louis
$1,207
American Airlines
Oct 16
STL6:32 amLambert-St Louis
19h 13m
1 stop
ICN3:45 pmIncheon Intl
Oct 25
ICN6:50 pmIncheon Intl
19h 08m
2 stops
STL11:58 pmLambert-St Louis
$1,211

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 July 29, 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 - ICN

STLICN

Lambert-St Louis

Mon 10/5

2:30 pm-4:00 am

1 stop23h 30m

Incheon Intl

Wed 11/4

9:35 am-8:41 pm

1 stop26h 06m

$1,106

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 8/26

4:40 pm-4:20 am

2 stops21h 40m

Incheon Intl

Wed 9/2

11:30 am-6:39 pm

1 stop21h 09m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 10/13

5:40 am-3:45 pm

1 stop20h 05m

Incheon Intl

Mon 11/2

6:50 pm-11:33 pm

1 stop19h 43m

$1,107
Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 8/25

8:36 am-3:45 pm

1 stop17h 09m

Incheon Intl

Tue 9/1

5:50 pm-11:42 pm

1 stop19h 52m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

6:47 am-4:50 pm

1 stop20h 03m

Incheon Intl

Wed 11/25

9:35 am-1:23 pm

1 stop18h 48m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/7

5:30 pm-4:20 am

2 stops20h 50m

Incheon Intl

Tue 9/15

5:15 pm-11:38 pm

1 stop20h 23m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 10/13

9:47 am-5:20 pm

1 stop17h 33m

Incheon Intl

Mon 11/2

7:25 pm-11:54 pm

1 stop19h 29m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/7

4:40 pm-4:20 am

2 stops21h 40m

Incheon Intl

Tue 9/15

5:15 pm-11:38 pm

1 stop20h 23m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/7

6:36 am-3:45 pm

1 stop19h 09m

Incheon Intl

Tue 9/15

5:50 pm-11:43 pm

1 stop19h 53m

$1,107

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 8/26

9:15 am-5:50 pm

1 stop18h 35m

Incheon Intl

Wed 9/2

8:45 am-4:17 pm

1 stop21h 32m

$24,168

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 October is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $866.

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

17h 20m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 17h 20m
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. 17h 20m 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
8,484 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
10,052 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,221 reviews
Search Korean Air 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