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Cheap flights from St. Louis to Seoul from $483

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 8/30. 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.
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
$826United Airlines
Tue, Sep 1 - Tue, Sep 15
United Airlines Logo
10:53 am - 4:20 am
STL
-
ICN
27h 27m
2 stops
United Airlines Logo
4:50 pm - 10:59 pm
ICN
-
STL
20h 09m
2 stops
$831United Airlines
Tue, Sep 1 - Wed, Sep 30
United Airlines Logo
6:00 am - 3:25 pm
STL
-
ICN
19h 25m
1 stop
United Airlines Logo
12:45 pm - 10:10 pm
ICN
-
STL
24h 25m
1 stop
$966United Airlines
Mon, Oct 26 - Wed, Nov 25
United Airlines Logo
10:53 am - 4:20 am
STL
-
ICN
27h 27m
2 stops
United Airlines Logo
11:45 am - 8:34 pm
ICN
-
STL
22h 49m
2 stops
$971United Airlines
Wed, Sep 2 - Wed, Oct 28
United Airlines Logo
9:30 am - 3:20 pm
STL
-
ICN
39h 50m
1 stop
United Airlines Logo
6:00 pm - 10:10 pm
ICN
-
STL
19h 10m
1 stop
$973United Airlines
Mon, Oct 5 - Wed, Nov 4
Asiana Airlines Logo
8:35 am - 4:20 am
STL
-
ICN
29h 45m
1 stop
Asiana Airlines Logo
11:30 am - 6:43 pm
ICN
-
STL
21h 13m
1 stop
$1,071Asiana Airlines
Wed, Sep 16 - Fri, Sep 25
Multiple Airlines Logo
8:55 am - 10:25 pm
STL
-
GMP
23h 30m
2 stops
Multiple Airlines Logo
9:00 am - 8:24 pm
GMP
-
STL
25h 24m
2 stops
$1,306Multiple Airlines
Tue, Aug 11 - Tue, Aug 18
Multiple Airlines Logo
8:55 am - 10:25 pm
STL
-
GMP
23h 30m
2 stops
Multiple Airlines Logo
7:40 am - 8:20 pm
GMP
-
STL
26h 40m
2 stops
$1,320Multiple Airlines
Thu, Aug 20 - Thu, Sep 10
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
$1,332Japan Airlines
Tue, Aug 18 - Tue, Aug 25
Japan Airlines Logo
6:35 am - 10:40 am
STL
-
GMP
38h 05m
2 stops
Japan Airlines Logo
7:40 pm - 12:35 pm
GMP
-
STL
30h 55m
2 stops
$1,391Japan Airlines
Sun, Sep 6 - Wed, Oct 28

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United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Sep 1
STL5:30 pmLambert-St Louis
20h 50m
2 stops
ICN4:20 amIncheon Intl
Sep 15
ICN5:15 pmIncheon Intl
20h 23m
1 stop
STL11:38 pmLambert-St Louis
$826
United Airlines
Sep 1
STL1:36 pmLambert-St Louis
24h 44m
2 stops
ICN4:20 amIncheon Intl
Sep 15
ICN11:30 amIncheon Intl
23h 08m
2 stops
STL8:38 pmLambert-St Louis
$831
United Airlines
Oct 26
STL7:05 pmLambert-St Louis
19h 35m
1 stop
ICN4:40 amIncheon Intl
Nov 25
ICN6:30 pmIncheon Intl
18h 21m
1 stop
STL9:51 pmLambert-St Louis
$966

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
$1,206
Air Canada
Sep 14
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Sep 18
ICN6:00 pmIncheon Intl
38h 41m
1 stop
STL6:41 pmLambert-St Louis
$1,233
Air Canada
Nov 8
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN6:25 pmIncheon Intl
Nov 14
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,243

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 13, 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
Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/1

5:30 pm-4:20 am

2 stops20h 50m

Incheon Intl

Tue 9/15

5:15 pm-11:38 pm

1 stop20h 23m

$826

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/1

10:53 am-4:20 am

2 stops27h 27m

Incheon Intl

Wed 9/30

4:50 pm-10:59 pm

2 stops20h 09m

$831

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

6:00 am-3:25 pm

1 stop19h 25m

Incheon Intl

Wed 11/25

12:45 pm-10:10 pm

1 stop24h 25m

$966

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/2

10:53 am-4:20 am

2 stops27h 27m

Incheon Intl

Wed 10/28

11:45 am-8:34 pm

2 stops22h 49m

$971

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

9:30 am-3:20 pm

1 stop39h 50m

Incheon Intl

Wed 11/4

6:00 pm-10:10 pm

1 stop19h 10m

$973

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/16

8:35 am-4:20 am

1 stop29h 45m

Incheon Intl

Fri 9/25

11:30 am-6:43 pm

1 stop21h 13m

$1,071

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 8/11

8:55 am-10:25 pm

2 stops23h 30m

Seoul Gimpo Intl

Tue 8/18

9:00 am-8:24 pm

2 stops25h 24m

$1,306

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 8/20

8:55 am-10:25 pm

2 stops23h 30m

Seoul Gimpo Intl

Thu 9/10

7:40 am-8:20 pm

2 stops26h 40m

$1,320

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 8/18

6:00 am-9:15 pm

2 stops25h 15m

Seoul Gimpo Intl

Tue 8/25

8:00 am-10:59 pm

2 stops28h 59m

$1,332

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 9/6

6:35 am-10:40 am

2 stops38h 05m

Seoul Gimpo Intl

Wed 10/28

7:40 pm-12:35 pm

2 stops30h 55m

$1,391

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 $751.

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 52m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 17h 52m
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 52m 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
8,467 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,987 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,222 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