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Cheap flights from St. Louis to Seoul from $366

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 4/16. 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
4:20 pm - 6:35 pm
STL
-
ICN
36h 15m
1 stop
Multiple Airlines Logo
8:35 pm - 11:59 pm
ICN
-
STL
17h 24m
1 stop
$753Multiple Airlines
Fri, Mar 20 - Sun, Mar 29
Multiple Airlines Logo
2:47 pm - 6:35 pm
STL
-
ICN
36h 48m
1 stop
Multiple Airlines Logo
8:35 pm - 1:23 pm
ICN
-
STL
31h 48m
1 stop
$759Multiple Airlines
Sat, Feb 28 - Sat, Mar 7
Multiple Airlines Logo
7:00 am - 6:35 pm
STL
-
ICN
21h 35m
1 stop
Multiple Airlines Logo
8:35 pm - 11:59 pm
ICN
-
STL
17h 24m
1 stop
$764Multiple Airlines
Wed, Apr 1 - Wed, Apr 15
Asiana Airlines Logo
7:05 pm - 4:20 am
STL
-
ICN
19h 15m
1 stop
Asiana Airlines Logo
4:50 pm - 5:47 am
ICN
-
STL
26h 57m
1 stop
$846Asiana Airlines
Sat, Apr 25 - Wed, May 6
Asiana Airlines Logo
2:40 pm - 4:20 am
STL
-
ICN
23h 40m
2 stops
Asiana Airlines Logo
4:50 pm - 5:47 am
ICN
-
STL
26h 57m
1 stop
$850Asiana Airlines
Sat, Apr 25 - Wed, May 6
Delta Logo
7:05 am - 4:50 pm
STL
-
ICN
19h 45m
2 stops
Delta Logo
7:00 pm - 11:12 pm
ICN
-
STL
18h 12m
2 stops
$851Delta
Thu, Apr 16 - Wed, Apr 22
Delta Logo
6:40 pm - 4:20 pm
STL
-
ICN
30h 40m
1 stop
Delta Logo
6:00 pm - 8:41 pm
ICN
-
STL
17h 41m
1 stop
$852Delta
Fri, Feb 27 - Fri, Mar 6
United Airlines Logo
7:45 am - 3:00 pm
STL
-
ICN
41h 15m
2 stops
United Airlines Logo
4:50 pm - 9:25 am
ICN
-
STL
30h 35m
2 stops
$864United Airlines
Sat, Apr 4 - Tue, Apr 14
Japan Airlines Logo
6:00 am - 6:20 pm
STL
-
GMP
45h 20m
2 stops
Japan Airlines Logo
12:05 pm - 6:16 pm
GMP
-
STL
45h 11m
2 stops
$880Japan Airlines
Thu, Jan 22 - Mon, Jan 26
Japan Airlines Logo
6:00 am - 10:55 am
STL
-
GMP
37h 55m
2 stops
Japan Airlines Logo
7:40 pm - 11:59 pm
GMP
-
STL
43h 19m
2 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
STL8:45 amLambert-St Louis
29h 55m
2 stops
ICN5:40 amIncheon Intl
Jan 26
ICN12:45 pmIncheon Intl
17h 52m
1 stop
STL3:37 pmLambert-St Louis
$851
United Airlines
Apr 4
STL7:45 amLambert-St Louis
41h 15m
2 stops
ICN3:00 pmIncheon Intl
Apr 14
ICN4:50 pmIncheon Intl
30h 35m
2 stops
STL9:25 amLambert-St Louis
$864
United Airlines
Apr 16
STL2:40 pmLambert-St Louis
23h 40m
2 stops
ICN4:20 amIncheon Intl
Apr 22
ICN4:50 pmIncheon Intl
20h 06m
2 stops
STL10:56 pmLambert-St Louis
$897

Asiana Airlines flights from St. Louis to Seoul

Our best Asiana Airlines deals on St. Louis to Seoul flight tickets
Asiana Airlines
Apr 25
STL7:05 pmLambert-St Louis
19h 15m
1 stop
ICN4:20 amIncheon Intl
May 6
ICN4:50 pmIncheon Intl
26h 57m
1 stop
STL5:47 amLambert-St Louis
$846
Asiana Airlines
Apr 25
STL2:40 pmLambert-St Louis
23h 40m
2 stops
ICN4:20 amIncheon Intl
May 6
ICN4:50 pmIncheon Intl
26h 57m
1 stop
STL5:47 amLambert-St Louis
$850
Asiana Airlines
Apr 16
STL11:15 amLambert-St Louis
27h 05m
2 stops
ICN4:20 amIncheon Intl
Apr 22
ICN11:30 amIncheon Intl
24h 58m
2 stops
STL10:28 pmLambert-St Louis
$940

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 15, 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

Fri 3/20

4:20 pm-6:35 pm

1 stop36h 15m

Incheon Intl

Sun 3/29

8:35 pm-11:59 pm

1 stop17h 24m

$753

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/28

2:47 pm-6:35 pm

1 stop36h 48m

Incheon Intl

Sat 3/7

8:35 pm-1:23 pm

1 stop31h 48m

$759

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/1

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/15

8:35 pm-11:59 pm

1 stop17h 24m

$764

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

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/25

2:40 pm-4:20 am

2 stops23h 40m

Incheon Intl

Wed 5/6

4:50 pm-5:47 am

1 stop26h 57m

$850

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

7:05 am-4:50 pm

2 stops19h 45m

Incheon Intl

Wed 4/22

7:00 pm-11:12 pm

2 stops18h 12m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 2/27

6:40 pm-4:20 pm

1 stop30h 40m

Incheon Intl

Fri 3/6

6:00 pm-8:41 pm

1 stop17h 41m

$852

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/4

7:45 am-3:00 pm

2 stops41h 15m

Incheon Intl

Tue 4/14

4:50 pm-9:25 am

2 stops30h 35m

$864

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

12:05 pm-6:16 pm

2 stops45h 11m

$880

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 1/22

6:00 am-10:55 am

2 stops37h 55m

Seoul Gimpo Intl

Mon 1/26

7:40 pm-11:59 pm

2 stops43h 19m

$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 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 $1,088 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 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

19h 14m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 19h 14m
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 14m 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
10,622 reviews
Search Air Canada flights
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,132 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,049 reviews
Search Delta flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,164 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