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Cheap flights from St. Louis to Seoul from $418

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 3/8. 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
2:50 pm - 6:35 pm
STL
-
ICN
36h 45m1 stop
Multiple Airlines Logo
8:35 pm - 1:54 pm
ICN
-
STL
32h 19m1 stop
$760Multiple Airlines
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
21h 35m1 stop
Multiple Airlines Logo
8:35 pm - 11:59 pm
ICN
-
STL
17h 24m1 stop
$846Multiple Airlines
Wed, Mar 18 - Sun, Mar 29
Delta Logo
6:35 am - 4:50 pm
STL
-
ICN
19h 15m1 stop
Delta Logo
7:30 pm - 11:25 pm
ICN
-
STL
18h 55m1 stop
$847Delta
Thu, Jan 22 - Mon, Jan 26
Japan Airlines Logo
7:04 am - 10:05 pm
STL
-
GMP
24h 01m2 stops
Japan Airlines Logo
12:05 pm - 11:59 pm
GMP
-
STL
26h 54m2 stops
$847Japan Airlines
Thu, Jan 22 - Mon, Jan 26
United Airlines Logo
2:40 pm - 4:20 am
STL
-
ICN
23h 40m2 stops
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m2 stops
$851United Airlines
Thu, Apr 16 - Wed, Apr 22
Delta Logo
11:30 am - 3:30 pm
STL
-
ICN
37h 00m1 stop
Delta Logo
6:00 pm - 7:56 pm
ICN
-
STL
16h 56m1 stop
$852Delta
Sat, Feb 21 - Sat, Feb 28
Delta Logo
7:03 am - 3:50 pm
STL
-
ICN
18h 47m1 stop
Delta Logo
7:25 pm - 8:47 am
ICN
-
STL
27h 22m1 stop
$853Delta
Wed, Mar 18 - Sat, Mar 28
Delta Logo
7:03 am - 3:50 pm
STL
-
ICN
18h 47m1 stop
Delta Logo
7:20 pm - 5:07 pm
ICN
-
STL
35h 47m1 stop
$854Delta
Wed, Mar 18 - Sun, Mar 29
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m1 stop
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m2 stops
$859United Airlines
Thu, Apr 16 - Wed, Apr 22
Japan Airlines Logo
6:00 am - 6:20 pm
STL
-
GMP
45h 20m2 stops
Japan Airlines Logo
7:40 pm - 2:50 pm
GMP
-
STL
34h 10m2 stops
$881Japan Airlines
Thu, Jan 22 - Mon, Jan 26

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Jan 22
STL11:20 amLambert-St Louis
27h 20m
2 stops
ICN5:40 amIncheon Intl
Jan 26
ICN12:45 pmIncheon Intl
25h 13m
2 stops
STL10:58 pmLambert-St Louis
$851
United Airlines
Apr 16
STL8:30 amLambert-St Louis
29h 50m
1 stop
ICN4:20 amIncheon Intl
Apr 22
ICN4:50 pmIncheon Intl
30h 35m
2 stops
STL9:25 amLambert-St Louis
$859
United Airlines
Jan 11
STL5:00 pmLambert-St Louis
21h 40m
1 stop
ICN5:40 amIncheon Intl
Jan 13
ICN6:00 pmIncheon Intl
19h 00m
2 stops
STL10:00 pmLambert-St Louis
$927

Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Jan 22
STL6:35 amLambert-St Louis
19h 15m
1 stop
ICN4:50 pmIncheon Intl
Jan 26
ICN7:30 pmIncheon Intl
18h 55m
1 stop
STL11:25 pmLambert-St Louis
$847
Delta
Feb 21
STL11:30 amLambert-St Louis
37h 00m
1 stop
ICN3:30 pmIncheon Intl
Feb 28
ICN6:00 pmIncheon Intl
16h 56m
1 stop
STL7:56 pmLambert-St Louis
$852
Delta
Mar 18
STL7:03 amLambert-St Louis
18h 47m
1 stop
ICN3:50 pmIncheon Intl
Mar 28
ICN7:25 pmIncheon Intl
27h 22m
1 stop
STL8:47 amLambert-St Louis
$853

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 8, 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 1/22

2:50 pm-6:35 pm

1 stop36h 45m

Incheon Intl

Mon 1/26

8:35 pm-1:54 pm

1 stop32h 19m

$760

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/18

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Sun 3/29

8:35 pm-11:59 pm

1 stop17h 24m

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 1/22

6:35 am-4:50 pm

1 stop19h 15m

Incheon Intl

Mon 1/26

7:30 pm-11:25 pm

1 stop18h 55m

$847

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 1/22

7:04 am-10:05 pm

2 stops24h 01m

Seoul Gimpo Intl

Mon 1/26

12:05 pm-11:59 pm

2 stops26h 54m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

2:40 pm-4:20 am

2 stops23h 40m

Incheon Intl

Wed 4/22

4:50 pm-9:25 am

2 stops30h 35m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/21

11:30 am-3:30 pm

1 stop37h 00m

Incheon Intl

Sat 2/28

6:00 pm-7:56 pm

1 stop16h 56m

$852

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/18

7:03 am-3:50 pm

1 stop18h 47m

Incheon Intl

Sat 3/28

7:25 pm-8:47 am

1 stop27h 22m

$853

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/18

7:03 am-3:50 pm

1 stop18h 47m

Incheon Intl

Sun 3/29

7:20 pm-5:07 pm

1 stop35h 47m

$854

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

8:30 am-4:20 am

1 stop29h 50m

Incheon Intl

Wed 4/22

4:50 pm-9:25 am

2 stops30h 35m

$859

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 1/22

6:00 am-6:20 pm

2 stops45h 20m

Seoul Gimpo Intl

Mon 1/26

7:40 pm-2:50 pm

2 stops34h 10m

$881

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 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 $1,110 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 $1,032 on momondo.

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

You could potentially save up to 7% 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

19h 15m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 19h 15m
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. 19h 15m 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
10,603 reviews
Search Air Canada flights
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,095 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,029 reviews
Search Delta flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,141 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,188 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