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Cheap flights from St. Louis to Seoul from $371

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 2/27. 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.
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
20h 35m
1 stop
Multiple Airlines Logo
8:35 pm - 11:59 pm
ICN
-
STL
17h 24m
1 stop
$767Multiple Airlines
Thu, Feb 19 - Sun, Mar 8
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
20h 35m
1 stop
Multiple Airlines Logo
8:35 pm - 11:59 pm
ICN
-
STL
17h 24m
1 stop
$779Multiple Airlines
Wed, Mar 4 - Mon, Mar 9
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
20h 35m
1 stop
Multiple Airlines Logo
8:35 pm - 1:51 pm
ICN
-
STL
31h 16m
1 stop
$785Multiple Airlines
Wed, Mar 4 - Mon, Mar 9
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
20h 35m
1 stop
Multiple Airlines Logo
9:20 pm - 7:11 pm
ICN
-
STL
59h 51m
2 stops
$837Multiple Airlines
Thu, Feb 19 - Sun, Mar 8
United Airlines Logo
7:05 pm - 4:20 am
STL
-
ICN
19h 15m
1 stop
United Airlines Logo
4:50 pm - 5:50 am
ICN
-
STL
27h 00m
1 stop
$867United Airlines
Thu, Apr 16 - Fri, Apr 24
United Airlines Logo
7:45 am - 4:20 am
STL
-
ICN
30h 35m
2 stops
United Airlines Logo
4:50 pm - 5:50 am
ICN
-
STL
27h 00m
1 stop
$871United Airlines
Wed, Apr 15 - Thu, Apr 23
Delta Logo
5:59 pm - 4:50 pm
STL
-
ICN
32h 51m
1 stop
Delta Logo
6:50 pm - 11:58 pm
ICN
-
STL
19h 08m
1 stop
$872Delta
Mon, Mar 16 - Tue, Mar 31
Delta Logo
5:01 pm - 3:50 pm
STL
-
ICN
31h 49m
1 stop
Delta Logo
7:40 pm - 12:21 am
ICN
-
STL
18h 41m
1 stop
$873Delta
Sat, Feb 21 - Sun, Mar 8
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
7:15 pm - 7:33 pm
GMP
-
STL
38h 18m
2 stops
$1,079Japan Airlines
Fri, Apr 17 - Thu, Apr 23
Japan Airlines Logo
6:21 am - 9:15 pm
STL
-
GMP
24h 54m
2 stops
Japan Airlines Logo
7:15 pm - 7:33 pm
GMP
-
STL
38h 18m
2 stops
$1,080Japan Airlines
Mon, Apr 13 - Thu, Apr 23

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Feb 16
STL5:25 pmLambert-St Louis
21h 15m
1 stop
ICN5:40 amIncheon Intl
Feb 20
ICN12:45 pmIncheon Intl
18h 59m
1 stop
STL4:44 pmLambert-St Louis
$817
United Airlines
Feb 16
STL11:25 amLambert-St Louis
27h 15m
2 stops
ICN5:40 amIncheon Intl
Feb 20
ICN12:45 pmIncheon Intl
18h 59m
1 stop
STL4:44 pmLambert-St Louis
$821
United Airlines
Feb 15
STL5:25 pmLambert-St Louis
31h 50m
1 stop
ICN4:15 pmIncheon Intl
Mar 8
ICN11:45 amIncheon Intl
23h 22m
2 stops
STL8:07 pmLambert-St Louis
$828

Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Feb 10
STL6:10 amLambert-St Louis
18h 20m
1 stop
ICN3:30 pmIncheon Intl
Feb 12
ICN7:30 pmIncheon Intl
18h 53m
1 stop
STL11:23 pmLambert-St Louis
$767
Delta
Feb 10
STL6:10 amLambert-St Louis
18h 20m
1 stop
ICN3:30 pmIncheon Intl
Feb 12
ICN8:05 pmIncheon Intl
18h 18m
2 stops
STL11:23 pmLambert-St Louis
$771
Delta
Feb 16
STL7:00 amLambert-St Louis
18h 20m
1 stop
ICN4:20 pmIncheon Intl
Mar 8
ICN7:40 pmIncheon Intl
18h 41m
1 stop
STL12:21 amLambert-St Louis
$817

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 February 9, 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 2/19

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 3/8

8:35 pm-11:59 pm

1 stop17h 24m

$767

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/4

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Mon 3/9

8:35 pm-11:59 pm

1 stop17h 24m

$779

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/4

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Mon 3/9

8:35 pm-1:51 pm

1 stop31h 16m

$785

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 2/19

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 3/8

9:20 pm-7:11 pm

2 stops59h 51m

$837

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

7:05 pm-4:20 am

1 stop19h 15m

Incheon Intl

Fri 4/24

4:50 pm-5:50 am

1 stop27h 00m

$867

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

7:45 am-4:20 am

2 stops30h 35m

Incheon Intl

Thu 4/23

4:50 pm-5:50 am

1 stop27h 00m

$871

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 3/16

5:59 pm-4:50 pm

1 stop32h 51m

Incheon Intl

Tue 3/31

6:50 pm-11:58 pm

1 stop19h 08m

$872

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/21

5:01 pm-3:50 pm

1 stop31h 49m

Incheon Intl

Sun 3/8

7:40 pm-12:21 am

1 stop18h 41m

$873

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Fri 4/17

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Thu 4/23

7:15 pm-7:33 pm

2 stops38h 18m

$1,079

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 4/13

6:21 am-9:15 pm

2 stops24h 54m

Seoul Gimpo Intl

Thu 4/23

7:15 pm-7:33 pm

2 stops38h 18m

$1,080

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 October is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $865.

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 $1,143 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 13% 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 20m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 20m
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 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
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,258 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,174 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,259 reviews
Search United Airlines flights
Air CanadaPriceFrom $874Free CancellationRating
7.1
10,698 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