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Cheap flights from St. Louis to Seoul from $455

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 8/28. 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.
American Airlines Logo
6:36 am - 3:45 pm
STL
-
ICN
19h 09m
1 stop
American Airlines Logo
5:50 pm - 12:27 am
ICN
-
STL
20h 37m
2 stops
$1,093American Airlines
Wed, Sep 2 - Wed, Sep 9
United Airlines Logo
7:08 am - 3:00 pm
STL
-
ICN
17h 52m
1 stop
United Airlines Logo
6:00 pm - 10:10 pm
ICN
-
STL
19h 10m
1 stop
$1,106United Airlines
Mon, Oct 5 - Wed, Nov 4
United Airlines Logo
3:12 pm - 4:20 am
STL
-
ICN
23h 08m
2 stops
United Airlines Logo
12:45 pm - 9:13 pm
ICN
-
STL
23h 28m
2 stops
$1,111United Airlines
Mon, Oct 5 - Wed, Nov 4
American Airlines Logo
6:32 am - 4:25 pm
STL
-
ICN
19h 53m
1 stop
American Airlines Logo
6:50 pm - 9:30 am
ICN
-
STL
29h 40m
1 stop
$1,112American Airlines
Mon, Oct 26 - Wed, Nov 25
American Airlines Logo
6:32 am - 4:25 pm
STL
-
ICN
19h 53m
1 stop
American Airlines Logo
6:50 pm - 9:30 am
ICN
-
STL
29h 40m
1 stop
$1,113American Airlines
Mon, Oct 26 - Wed, Nov 25
Multiple Airlines Logo
6:29 am - 10:25 pm
STL
-
ICN
25h 56m
2 stops
Multiple Airlines Logo
8:05 pm - 9:08 pm
ICN
-
STL
39h 03m
2 stops
$1,120Multiple Airlines
Wed, Sep 23 - Sun, Oct 4
Multiple Airlines Logo
6:00 am - 12:25 am
STL
-
ICN
28h 25m
2 stops
Multiple Airlines Logo
8:00 am - 11:43 pm
ICN
-
STL
29h 43m
2 stops
$1,121Multiple Airlines
Wed, Sep 2 - Wed, Sep 23
Delta Logo
8:46 am - 5:20 pm
STL
-
ICN
18h 34m
1 stop
Delta Logo
7:40 pm - 11:16 pm
ICN
-
STL
17h 36m
1 stop
$1,156Delta
Wed, Sep 16 - Fri, Sep 25
Japan Airlines Logo
6:00 am - 9:15 pm
STL
-
GMP
25h 15m
2 stops
Japan Airlines Logo
8:00 am - 10:59 pm
GMP
-
STL
28h 59m
2 stops
$1,333Japan Airlines
Tue, Aug 18 - Mon, Aug 24
Japan Airlines Logo
6:00 am - 9:15 pm
STL
-
GMP
25h 15m
2 stops
Japan Airlines Logo
12:05 pm - 10:59 pm
GMP
-
STL
24h 54m
2 stops
$1,392Japan Airlines
Sun, Aug 23 - Sun, Aug 30

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Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
Nov 15
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN6:25 pmIncheon Intl
Nov 18
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,244
Air Canada
Jan 6
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN6:25 pmIncheon Intl
Jan 26
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,273
Air Canada
Aug 4
STL12:10 pmLambert-St Louis
61h 55m
2 stops
ICN4:05 pmIncheon Intl
Aug 21
ICN5:45 pmIncheon Intl
34h 19m
2 stops
STL2:04 pmLambert-St Louis
$1,286

American Airlines flights from St. Louis to Seoul

Our best American Airlines deals on St. Louis to Seoul flight tickets
American Airlines
Sep 2
STL6:36 amLambert-St Louis
19h 09m
1 stop
ICN3:45 pmIncheon Intl
Sep 9
ICN5:50 pmIncheon Intl
20h 37m
2 stops
STL12:27 amLambert-St Louis
$1,093
American Airlines
Oct 26
STL6:32 amLambert-St Louis
19h 53m
1 stop
ICN4:25 pmIncheon Intl
Nov 25
ICN6:50 pmIncheon Intl
29h 40m
1 stop
STL9:30 amLambert-St Louis
$1,112
American Airlines
Oct 26
STL6:32 amLambert-St Louis
19h 53m
1 stop
ICN4:25 pmIncheon Intl
Nov 25
ICN6:50 pmIncheon Intl
29h 40m
1 stop
STL9:30 amLambert-St Louis
$1,113

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 23, 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

Wed 9/2

6:36 am-3:45 pm

1 stop19h 09m

Incheon Intl

Wed 9/9

5:50 pm-12:27 am

2 stops20h 37m

$1,093

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

7:08 am-3:00 pm

1 stop17h 52m

Incheon Intl

Wed 11/4

6:00 pm-10:10 pm

1 stop19h 10m

$1,106

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

3:12 pm-4:20 am

2 stops23h 08m

Incheon Intl

Wed 11/4

12:45 pm-9:13 pm

2 stops23h 28m

$1,111

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

6:32 am-4:25 pm

1 stop19h 53m

Incheon Intl

Wed 11/25

6:50 pm-9:30 am

1 stop29h 40m

$1,112

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

6:32 am-4:25 pm

1 stop19h 53m

Incheon Intl

Wed 11/25

6:50 pm-9:30 am

1 stop29h 40m

$1,113

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/23

6:29 am-10:25 pm

2 stops25h 56m

Incheon Intl

Sun 10/4

8:05 pm-9:08 pm

2 stops39h 03m

$1,120

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/2

6:00 am-12:25 am

2 stops28h 25m

Incheon Intl

Wed 9/23

8:00 am-11:43 pm

2 stops29h 43m

$1,121
Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/16

8:46 am-5:20 pm

1 stop18h 34m

Incheon Intl

Fri 9/25

7:40 pm-11:16 pm

1 stop17h 36m

$1,156

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 8/18

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Mon 8/24

8:00 am-10:59 pm

2 stops28h 59m

$1,333

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 8/23

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Sun 8/30

12:05 pm-10:59 pm

2 stops24h 54m

$1,392

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 typical price of a round-trip flight between St. Louis and Seoul?

Prices are currently low for flights on this route.

Typical prices usually range from $1,226 to $1,653.
The lowest price recently found on this route was $1,093.

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

19h 44m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 19h 44m
There are no direct flights from St. Louis to Seoul. There are no popular flight routes from St. Louis to Seoul.
Search flight deals

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. 19h 44m 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
10,024 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.

An easier way to manage your Seoul trip

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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