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Cheap flights from St. Louis to Seoul from $385

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 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
United Airlines Logo
2:40 pm - 4:20 am
STL
-
ICN
23h 40m
2 stops
United Airlines Logo
4:50 pm - 5:50 am
ICN
-
STL
27h 00m
1 stop
$822United Airlines
Thu, Apr 16 - Thu, Apr 23
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m
1 stop
United Airlines Logo
4:50 pm - 5:50 am
ICN
-
STL
27h 00m
1 stop
$824United Airlines
Thu, Apr 16 - Thu, Apr 23
Lufthansa Logo
3:15 pm - 4:20 am
STL
-
ICN
23h 05m
2 stops
Lufthansa Logo
11:30 am - 8:54 pm
ICN
-
STL
23h 24m
2 stops
$827Lufthansa
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m
1 stop
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m
2 stops
$829United Airlines
Wed, Apr 15 - Wed, Apr 22
Lufthansa Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m
1 stop
Lufthansa Logo
11:30 am - 8:54 pm
ICN
-
STL
23h 24m
2 stops
$835Lufthansa
Tue, Apr 14 - Tue, Apr 21
Air Canada Logo
1:00 pm - 4:05 pm
STL
-
ICN
37h 05m
2 stops
Air Canada Logo
6:00 pm - 8:25 pm
ICN
-
STL
40h 25m
1 stop
$862Air Canada
Mon, May 11 - Tue, Jun 23
United Airlines Logo
7:05 pm - 4:20 am
STL
-
ICN
19h 15m
1 stop
United Airlines Logo
4:50 pm - 5:47 am
ICN
-
STL
26h 57m
1 stop
$867United Airlines
Sat, Apr 25 - Wed, May 6
Air Canada Logo
1:00 pm - 4:05 pm
STL
-
ICN
37h 05m
2 stops
Air Canada Logo
6:00 pm - 12:21 pm
ICN
-
STL
32h 21m
2 stops
$870Air Canada
Mon, May 11 - Tue, Jun 23
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
8:00 am - 11:57 pm
GMP
-
STL
29h 57m
2 stops
$1,054Japan Airlines
Wed, Apr 15 - Wed, Apr 22
Japan Airlines Logo
2:19 pm - 10:55 am
STL
-
GMP
30h 36m
2 stops
Japan Airlines Logo
8:00 am - 11:58 pm
GMP
-
STL
29h 58m
2 stops
$1,082Japan Airlines
Mon, Mar 16 - Tue, Mar 31

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
May 11
STL1:00 pmLambert-St Louis
37h 05m
2 stops
ICN4:05 pmIncheon Intl
Jun 23
ICN6:00 pmIncheon Intl
40h 25m
1 stop
STL8:25 pmLambert-St Louis
$862
Air Canada
May 11
STL1:00 pmLambert-St Louis
37h 05m
2 stops
ICN4:05 pmIncheon Intl
Jun 23
ICN6:00 pmIncheon Intl
32h 21m
2 stops
STL12:21 pmLambert-St Louis
$870
Air Canada
Apr 15
STL4:05 pmLambert-St Louis
35h 25m
1 stop
ICN5:30 pmIncheon Intl
Apr 22
ICN7:05 pmIncheon Intl
34h 20m
1 stop
STL3:25 pmLambert-St Louis
$872

Asiana Airlines flights from St. Louis to Seoul

Our best Asiana Airlines deals on St. Louis to Seoul flight tickets
Asiana Airlines
Apr 17
STL6:05 pmLambert-St Louis
30h 55m
2 stops
ICN3:00 pmIncheon Intl
Apr 30
ICN11:30 amIncheon Intl
35h 09m
2 stops
STL8:39 amLambert-St Louis
$955
Asiana Airlines
May 3
STL2:20 pmLambert-St Louis
37h 10m
1 stop
ICN5:30 pmIncheon Intl
May 11
ICN5:45 pmIncheon Intl
40h 40m
2 stops
STL8:25 pmLambert-St Louis
$989
Asiana Airlines
May 3
STL2:20 pmLambert-St Louis
37h 10m
1 stop
ICN5:30 pmIncheon Intl
May 14
ICN7:05 pmIncheon Intl
31h 01m
1 stop
STL12:06 pmLambert-St Louis
$994

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 March 5, 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

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

2:40 pm-4:20 am

2 stops23h 40m

Incheon Intl

Thu 4/23

4:50 pm-5:50 am

1 stop27h 00m

$822

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

8:30 am-4:20 am

1 stop29h 50m

Incheon Intl

Thu 4/23

4:50 pm-5:50 am

1 stop27h 00m

$824

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 4/14

3:15 pm-4:20 am

2 stops23h 05m

Incheon Intl

Tue 4/21

11:30 am-8:54 pm

2 stops23h 24m

$827

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

8:30 am-4:20 am

1 stop29h 50m

Incheon Intl

Wed 4/22

4:50 pm-9:25 am

2 stops30h 35m

$829

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 4/14

8:30 am-4:20 am

1 stop29h 50m

Incheon Intl

Tue 4/21

11:30 am-8:54 pm

2 stops23h 24m

$835

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 5/11

1:00 pm-4:05 pm

2 stops37h 05m

Incheon Intl

Tue 6/23

6:00 pm-8:25 pm

1 stop40h 25m

$862

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/25

7:05 pm-4:20 am

1 stop19h 15m

Incheon Intl

Wed 5/6

4:50 pm-5:47 am

1 stop26h 57m

$867

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 5/11

1:00 pm-4:05 pm

2 stops37h 05m

Incheon Intl

Tue 6/23

6:00 pm-12:21 pm

2 stops32h 21m

$870

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 4/15

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Wed 4/22

8:00 am-11:57 pm

2 stops29h 57m

$1,054

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 3/16

2:19 pm-10:55 am

2 stops30h 36m

Seoul Gimpo Intl

Tue 3/31

8:00 am-11:58 pm

2 stops29h 58m

$1,082

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

What is the cheapest month to fly to Seoul?

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

How far in advance should I book a flight to Seoul?

You are more likely to see cheaper flights to Seoul from St. Louis when booking week ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,157 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seoul from St. Louis for as low as $907 on momondo.

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

You could potentially save up to 18% 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 24m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 24m
There are no direct flights from St. Louis to Seoul. There are no popular flight routes from St. Louis to Seoul.
Search flight deals

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

    The distance between Lambert-St Louis and Seoul is about 6661.9 mi. 18h 24m 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
American AirlinesPriceFrom $846Free CancellationRating
7.1
11,384 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,250 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,394 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,195 reviews
Search Korean Air flights
Air CanadaPriceFrom $1,083Free CancellationRating
7.1
10,777 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