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Cheap flights from St. Louis to Seoul from $506

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 9/5. 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.
Multiple Airlines Logo
12:17 pm - 4:30 amSTL  Lambert-St Louis-ICN Incheon Intl
26h 13m2 stops Las Vegas Harry Reid Intl Los Angeles Los Angeles
Multiple Airlines Logo
1:00 pm - 11:32 amICN  Incheon Intl-STL Lambert-St Louis
36h 32m2 stops Los Angeles Los Angeles Las Vegas Harry Reid Intl
$1,079Multiple Airlines
Fri, Sep 11 - Fri, Sep 18
United Airlines Logo
5:10 am - 3:00 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 50m2 stops Denver Intl San Francisco
United Airlines Logo
11:30 am - 6:43 pmICN  Incheon Intl-STL Lambert-St Louis
21h 13m1 stop San Francisco
$1,107United Airlines
Tue, Oct 6 - Tue, Oct 13
Delta Logo
6:47 am - 4:50 pmSTL  Lambert-St Louis-ICN Incheon Intl
20h 03m1 stop Detroit Metropolitan Wayne County
Delta Logo
9:35 am - 1:23 pmICN  Incheon Intl-STL Lambert-St Louis
18h 48m1 stop Detroit Metropolitan Wayne County
$1,107Delta
Mon, Oct 26 - Wed, Nov 25
Delta Logo
7:20 pm - 4:00 amSTL  Lambert-St Louis-ICN Incheon Intl
18h 40m1 stop Atlanta Hartsfield-Jackson
Delta Logo
4:25 pm - 11:54 pmICN  Incheon Intl-STL Lambert-St Louis
21h 29m1 stop Atlanta Hartsfield-Jackson
$1,107Delta
Tue, Oct 6 - Tue, Oct 13
American Airlines Logo
7:00 am - 3:45 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 45m1 stop Dallas/Fort Worth
American Airlines Logo
6:50 pm - 8:19 pmICN  Incheon Intl-STL Lambert-St Louis
16h 29m1 stop Dallas/Fort Worth
$1,107American Airlines
Tue, Sep 15 - Tue, Nov 17
United Airlines Logo
4:40 pm - 4:20 amSTL  Lambert-St Louis-ICN Incheon Intl
21h 40m2 stops Denver Intl San Francisco
United Airlines Logo
6:30 pm - 9:52 pmICN  Incheon Intl-STL Lambert-St Louis
18h 22m1 stop Newark
$1,107United Airlines
Tue, Sep 15 - Tue, Nov 17
United Airlines Logo
1:29 pm - 4:20 amSTL  Lambert-St Louis-ICN Incheon Intl
24h 51m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
11:30 am - 8:36 pmICN  Incheon Intl-STL Lambert-St Louis
23h 06m2 stops San Francisco Denver Intl
$1,112United Airlines
Tue, Oct 6 - Tue, Oct 13
American Airlines Logo
6:00 am - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
19h 25m1 stop Dallas/Fort Worth
American Airlines Logo
6:50 pm - 10:25 pmICN  Incheon Intl-STL Lambert-St Louis
18h 35m1 stop Dallas/Fort Worth
$1,157American Airlines
Tue, Nov 24 - Fri, Dec 4
Air Canada Logo
2:40 pm - 4:05 pmSTL  Lambert-St Louis-ICN Incheon Intl
35h 25m2 stops Toronto Pearson Intl Vancouver Intl
Air Canada Logo
6:55 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
35h 31m2 stops Vancouver Intl Toronto Pearson Intl
$1,169Air Canada
Mon, Oct 5 - Wed, Nov 4
Air Canada Logo
8:55 am - 5:30 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 35m1 stop Toronto Pearson Intl
Air Canada Logo
5:45 pm - 2:00 pmICN  Incheon Intl-STL Lambert-St Louis
34h 15m2 stops Vancouver Intl Toronto Pearson Intl
$1,169Air Canada
Thu, Sep 10 - Tue, Sep 15

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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 16m
1 stop
STL8:51 pmLambert-St Louis
$1,107
Delta
Oct 26
STL7:20 pmLambert-St Louis
19h 25m
1 stop
ICN4:45 amIncheon Intl
Nov 25
ICN9:35 amIncheon Intl
23h 38m
2 stops
STL6:13 pmLambert-St Louis
$1,112
Delta
Sep 16
STL8:46 amLambert-St Louis
18h 34m
1 stop
ICN5:20 pmIncheon Intl
Sep 25
ICN7:40 pmIncheon Intl
17h 36m
1 stop
STL11:16 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
Sep 16
STL1:36 pmLambert-St Louis
24h 44m
2 stops
ICN4:20 amIncheon Intl
Sep 25
ICN11:30 amIncheon Intl
23h 51m
2 stops
STL9:21 pmLambert-St Louis
$1,162
United Airlines
Sep 6
STL6:59 pmLambert-St Louis
19h 21m
2 stops
ICN4:20 amIncheon Intl
Sep 13
ICN5:15 pmIncheon Intl
32h 47m
2 stops
STL12:02 pmLambert-St Louis
$1,212
United Airlines
Nov 1
STL6:50 pmLambert-St Louis
30h 25m
2 stops
ICN4:15 pmIncheon Intl
Nov 5
ICN6:00 pmIncheon Intl
19h 24m
2 stops
STL10:24 pmLambert-St Louis
$1,426

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 10, 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

Fri 9/11

12:17 pm-4:30 am

2 stops26h 13m

Incheon Intl

Fri 9/18

1:00 pm-11:32 am

2 stops36h 32m

$1,079

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 10/6

5:10 am-3:00 pm

2 stops19h 50m

Incheon Intl

Tue 10/13

11:30 am-6:43 pm

1 stop21h 13m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

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 Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 10/6

7:20 pm-4:00 am

1 stop18h 40m

Incheon Intl

Tue 10/13

4:25 pm-11:54 pm

1 stop21h 29m

$1,107
Quickest round-trip

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 9/15

7:00 am-3:45 pm

1 stop18h 45m

Incheon Intl

Tue 11/17

6:50 pm-8:19 pm

1 stop16h 29m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 9/15

4:40 pm-4:20 am

2 stops21h 40m

Incheon Intl

Tue 11/17

6:30 pm-9:52 pm

1 stop18h 22m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 10/6

1:29 pm-4:20 am

2 stops24h 51m

Incheon Intl

Tue 10/13

11:30 am-8:36 pm

2 stops23h 06m

$1,112

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 11/24

6:00 am-4:25 pm

1 stop19h 25m

Incheon Intl

Fri 12/4

6:50 pm-10:25 pm

1 stop18h 35m

$1,157

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

2:40 pm-4:05 pm

2 stops35h 25m

Incheon Intl

Wed 11/4

6:55 pm-3:26 pm

2 stops35h 31m

$1,169

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Thu 9/10

8:55 am-5:30 pm

1 stop18h 35m

Incheon Intl

Tue 9/15

5:45 pm-2:00 pm

2 stops34h 15m

$1,169

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 $870.

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 10m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 10m
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 10m 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
8,497 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
10,099 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,222 reviews
Search Korean Air flights
Air CanadaPriceFrom $1,083Free CancellationRating
7.1
11,456 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