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Cheap flights from St. Louis to Seoul from $367

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 2/15. 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.
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
18h 24m
1 stop
$747Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
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
$753Multiple Airlines
Sun, Feb 15 - Sun, Mar 15
Multiple Airlines Logo
2:47 pm - 6:35 pm
STL
-
ICN
36h 48m
1 stop
Multiple Airlines Logo
8:35 pm - 2:23 pm
ICN
-
STL
32h 48m
1 stop
$760Multiple Airlines
Sat, Feb 14 - Sat, Feb 21
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
18h 24m
1 stop
$766Multiple Airlines
Thu, Feb 19 - Sun, Feb 22
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
18h 24m
1 stop
$767Multiple Airlines
Wed, Feb 18 - Sun, Feb 22
United Airlines Logo
6:51 am - 4:15 pm
STL
-
ICN
18h 24m
1 stop
United Airlines Logo
5:00 pm - 11:34 pm
ICN
-
STL
20h 34m
2 stops
$851United Airlines
Thu, Mar 5 - Mon, Mar 9
Delta Logo
10:50 am - 4:50 pm
STL
-
ICN
40h 00m
1 stop
Delta Logo
6:00 pm - 11:58 pm
ICN
-
STL
19h 58m
1 stop
$852Delta
Sat, Mar 21 - Thu, Mar 26
Japan Airlines Logo
7:05 am - 10:45 am
STL
-
GMP
37h 40m
2 stops
Japan Airlines Logo
7:55 am - 10:14 pm
GMP
-
STL
28h 19m
2 stops
$862Japan Airlines
Thu, Apr 16 - Wed, Apr 22
United Airlines Logo
4:30 pm - 4:15 pm
STL
-
ICN
32h 45m
2 stops
United Airlines Logo
6:00 pm - 10:36 am
ICN
-
STL
31h 36m
2 stops
$864United Airlines
Sat, Feb 14 - Sat, Feb 21
Japan Airlines Logo
7:05 am - 10:45 am
STL
-
GMP
37h 40m
2 stops
Japan Airlines Logo
7:55 am - 10:14 pm
GMP
-
STL
28h 19m
2 stops
$912Japan Airlines
Thu, Apr 16 - Wed, Apr 22

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Jan 22
STL5:00 pmLambert-St Louis
21h 40m
1 stop
ICN5:40 amIncheon Intl
Jan 26
ICN12:45 pmIncheon Intl
17h 52m
1 stop
STL3:37 pmLambert-St Louis
$847
United Airlines
Jan 22
STL5:00 pmLambert-St Louis
21h 40m
1 stop
ICN5:40 amIncheon Intl
Jan 26
ICN12:45 pmIncheon Intl
24h 15m
2 stops
STL10:00 pmLambert-St Louis
$851
United Airlines
Jan 30
STL6:45 amLambert-St Louis
31h 55m
1 stop
ICN5:40 amIncheon Intl
Feb 5
ICN12:45 pmIncheon Intl
17h 52m
1 stop
STL3:37 pmLambert-St Louis
$854

Alaska Airlines flights from St. Louis to Seoul

Our best Alaska Airlines deals on St. Louis to Seoul flight tickets
Alaska Airlines
May 5
STL4:46 pmLambert-St Louis
34h 44m
1 stop
ICN5:30 pmIncheon Intl
May 8
ICN7:35 pmIncheon Intl
18h 24m
1 stop
STL11:59 pmLambert-St Louis
$874
Alaska Airlines
May 5
STL4:46 pmLambert-St Louis
34h 44m
1 stop
ICN5:30 pmIncheon Intl
May 10
ICN7:35 pmIncheon Intl
34h 15m
1 stop
STL3:50 pmLambert-St Louis
$882
Alaska Airlines
May 4
STL7:00 amLambert-St Louis
20h 30m
1 stop
ICN5:30 pmIncheon Intl
May 8
ICN7:35 pmIncheon Intl
18h 24m
1 stop
STL11:59 pmLambert-St Louis
$1,077

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 January 21, 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

Wed 2/18

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 2/22

8:35 pm-11:59 pm

1 stop18h 24m

$747

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 2/15

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 3/15

8:35 pm-1:51 pm

1 stop31h 16m

$753

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/14

2:47 pm-6:35 pm

1 stop36h 48m

Incheon Intl

Sat 2/21

8:35 pm-2:23 pm

1 stop32h 48m

$760

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 2/19

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 2/22

8:35 pm-11:59 pm

1 stop18h 24m

$766

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 2/18

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Sun 2/22

8:35 pm-11:59 pm

1 stop18h 24m

$767

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/5

6:51 am-4:15 pm

1 stop18h 24m

Incheon Intl

Mon 3/9

5:00 pm-11:34 pm

2 stops20h 34m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 3/21

10:50 am-4:50 pm

1 stop40h 00m

Incheon Intl

Thu 3/26

6:00 pm-11:58 pm

1 stop19h 58m

$852

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

7:05 am-10:45 am

2 stops37h 40m

Seoul Gimpo Intl

Wed 4/22

7:55 am-10:14 pm

2 stops28h 19m

$862

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/14

4:30 pm-4:15 pm

2 stops32h 45m

Incheon Intl

Sat 2/21

6:00 pm-10:36 am

2 stops31h 36m

$864

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

7:05 am-10:45 am

2 stops37h 40m

Seoul Gimpo Intl

Wed 4/22

7:55 am-10:14 pm

2 stops28h 19m

$912

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 weeks ahead of your departure date. In general, you can expect to find flights to Seoul for around $1,094 when searching weeks 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 $1,048 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

17h 55m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 17h 55m
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. 17h 55m 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
Air CanadaPriceFrom $799Free CancellationRating
7.1
10,646 reviews
Search Air Canada flights
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,173 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,089 reviews
Search Delta flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,191 reviews
Search United Airlines 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