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Cheap flights from St. Louis to Seoul from $563

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 7/21. 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.
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
6:55 pm - 3:30 pm
ICN
-
STL
35h 35m
2 stops
$1,266Air Canada
Mon, Aug 24 - Mon, Nov 16
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
8:10 pm - 3:30 pm
ICN
-
STL
34h 20m
1 stop
$1,288Air Canada
Mon, Aug 24 - Mon, Nov 16
Air Canada Logo
12:10 pm - 4:05 pm
STL
-
ICN
61h 55m
2 stops
Air Canada Logo
6:55 pm - 3:30 pm
ICN
-
STL
35h 35m
2 stops
$1,300Air Canada
Sat, Oct 17 - Sun, Nov 1
Air Canada Logo
2:15 pm - 4:05 pm
STL
-
ICN
35h 50m
2 stops
Air Canada Logo
6:00 pm - 8:25 pm
ICN
-
STL
40h 25m
1 stop
$1,304Air Canada
Tue, Jun 9 - Tue, Jun 16
Air Canada Logo
2:15 pm - 4:05 pm
STL
-
ICN
35h 50m
2 stops
Air Canada Logo
6:00 pm - 12:06 pm
ICN
-
STL
32h 06m
2 stops
$1,312Air Canada
Tue, Jun 9 - Tue, Jun 16
Qatar Airways Logo
7:00 am - 5:15 pm
STL
-
ICN
44h 15m
2 stops
Qatar Airways Logo
12:20 am - 11:59 pm
ICN
-
STL
38h 39m
2 stops
$1,321Qatar Airways
Thu, Oct 29 - Fri, Nov 6
Multiple Airlines Logo
6:00 am - 12:25 am
STL
-
ICN
28h 25m
2 stops
Multiple Airlines Logo
1:55 am - 10:55 pm
ICN
-
STL
35h 00m
2 stops
$1,342Multiple Airlines
Wed, Aug 19 - Tue, Sep 1
Multiple Airlines Logo
9:31 am - 9:15 pm
STL
-
GMP
21h 44m
2 stops
Multiple Airlines Logo
8:00 am - 4:24 pm
GMP
-
STL
22h 24m
2 stops
$1,457Multiple Airlines
Wed, Aug 19 - Wed, Sep 2
Japan Airlines Logo
9:31 am - 5:55 pm
STL
-
GMP
42h 24m
2 stops
Japan Airlines Logo
8:00 am - 2:25 pm
GMP
-
STL
20h 25m
2 stops
$1,564Japan Airlines
Mon, Sep 7 - Fri, Sep 11
Japan Airlines Logo
9:46 am - 5:55 pm
STL
-
GMP
42h 09m
2 stops
Japan Airlines Logo
12:05 pm - 2:25 pm
GMP
-
STL
40h 20m
2 stops
$1,571Japan Airlines
Thu, Sep 10 - Mon, Sep 14

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Jul 27
STL7:23 pmLambert-St Louis
18h 57m
1 stop
ICN4:20 amIncheon Intl
Aug 19
ICN4:50 pmIncheon Intl
31h 19m
2 stops
STL10:09 amLambert-St Louis
$1,361
United Airlines
Jul 26
STL7:23 pmLambert-St Louis
29h 37m
1 stop
ICN3:00 pmIncheon Intl
Aug 19
ICN4:50 pmIncheon Intl
31h 19m
2 stops
STL10:09 amLambert-St Louis
$1,372
United Airlines
Jul 25
STL6:01 amLambert-St Louis
32h 19m
2 stops
ICN4:20 amIncheon Intl
Aug 18
ICN4:50 pmIncheon Intl
31h 19m
2 stops
STL10:09 amLambert-St Louis
$1,411

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
May 13
STL1:05 pmLambert-St Louis
37h 00m
2 stops
ICN4:05 pmIncheon Intl
Jun 16
ICN6:00 pmIncheon Intl
40h 25m
1 stop
STL8:25 pmLambert-St Louis
$1,120
Air Canada
May 13
STL1:05 pmLambert-St Louis
37h 00m
2 stops
ICN4:05 pmIncheon Intl
Jun 16
ICN6:00 pmIncheon Intl
32h 06m
2 stops
STL12:06 pmLambert-St Louis
$1,128
Air Canada
Aug 4
STL12:10 pmLambert-St Louis
61h 55m
2 stops
ICN4:05 pmIncheon Intl
Aug 20
ICN5:45 pmIncheon Intl
38h 57m
2 stops
STL6:42 pmLambert-St Louis
$1,261

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 May 10, 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

Cheapest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 8/24

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Mon 11/16

6:55 pm-3:30 pm

2 stops35h 35m

$1,266

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 8/24

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Mon 11/16

8:10 pm-3:30 pm

1 stop34h 20m

$1,288

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 10/17

12:10 pm-4:05 pm

2 stops61h 55m

Incheon Intl

Sun 11/1

6:55 pm-3:30 pm

2 stops35h 35m

$1,300

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 6/9

2:15 pm-4:05 pm

2 stops35h 50m

Incheon Intl

Tue 6/16

6:00 pm-8:25 pm

1 stop40h 25m

$1,304

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 6/9

2:15 pm-4:05 pm

2 stops35h 50m

Incheon Intl

Tue 6/16

6:00 pm-12:06 pm

2 stops32h 06m

$1,312

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 10/29

7:00 am-5:15 pm

2 stops44h 15m

Incheon Intl

Fri 11/6

12:20 am-11:59 pm

2 stops38h 39m

$1,321

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 8/19

6:00 am-12:25 am

2 stops28h 25m

Incheon Intl

Tue 9/1

1:55 am-10:55 pm

2 stops35h 00m

$1,342
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 8/19

9:31 am-9:15 pm

2 stops21h 44m

Seoul Gimpo Intl

Wed 9/2

8:00 am-4:24 pm

2 stops22h 24m

$1,457

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 9/7

9:31 am-5:55 pm

2 stops42h 24m

Seoul Gimpo Intl

Fri 9/11

8:00 am-2:25 pm

2 stops20h 25m

$1,564

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 9/10

9:46 am-5:55 pm

2 stops42h 09m

Seoul Gimpo Intl

Mon 9/14

12:05 pm-2:25 pm

2 stops40h 20m

$1,571

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 October is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $522.

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

You could potentially save up to 21% 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 57m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 57m
There are no direct flights from St. Louis to Seoul. There are no popular flight routes from St. Louis to Seoul.
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Frequently asked questions about flying from St. Louis to Seoul

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

    The distance between Lambert-St Louis and Seoul is about 6661.9 mi. 18h 57m 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 $832Free CancellationRating
7.1
11,667 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,455 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,694 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