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Cheap flights from St. Louis to Seoul from $406

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 4/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 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
4:05 pm - 5:30 pm
STL
-
ICN
35h 25m
1 stop
Air Canada Logo
7:05 pm - 3:25 pm
ICN
-
STL
34h 20m
1 stop
$910Air Canada
Wed, Apr 15 - Wed, Apr 22
Air Canada Logo
4:05 pm - 4:05 pm
STL
-
ICN
34h 00m
2 stops
Air Canada Logo
5:45 pm - 3:25 pm
ICN
-
STL
35h 40m
2 stops
$924Air Canada
Wed, Apr 15 - Wed, Apr 22
Air Canada Logo
2:40 pm - 4:05 pm
STL
-
ICN
35h 25m
2 stops
Air Canada Logo
8:10 pm - 3:30 pm
ICN
-
STL
34h 20m
1 stop
$946Air Canada
Tue, Sep 1 - Sun, Nov 1
Air Canada Logo
4:05 pm - 4:05 pm
STL
-
ICN
34h 00m
2 stops
Air Canada Logo
7:05 pm - 3:25 pm
ICN
-
STL
34h 20m
1 stop
$947Air Canada
Thu, Apr 16 - Wed, Apr 22
Air Canada Logo
4:05 pm - 4:05 pm
STL
-
ICN
34h 00m
2 stops
Air Canada Logo
7:05 pm - 8:25 pm
ICN
-
STL
39h 20m
2 stops
$950Air Canada
Thu, Apr 23 - Thu, Apr 30
Air Canada Logo
4:05 pm - 4:05 pm
STL
-
ICN
34h 00m
2 stops
Air Canada Logo
7:05 pm - 8:25 pm
ICN
-
STL
39h 20m
2 stops
$951Air Canada
Thu, Apr 23 - Thu, Apr 30
Delta Logo
10:07 am - 4:00 am
STL
-
ICN
27h 53m
1 stop
Delta Logo
4:25 pm - 11:59 pm
ICN
-
STL
21h 34m
1 stop
$967Delta
Sat, Apr 11 - Sat, May 9
United Airlines Logo
2:40 pm - 4:20 am
STL
-
ICN
23h 40m
2 stops
United Airlines Logo
4:50 pm - 8:25 am
ICN
-
STL
29h 35m
2 stops
$971United Airlines
Wed, Apr 15 - Wed, Apr 22
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
8:00 am - 2:03 pm
GMP
-
STL
20h 03m
2 stops
$1,178Japan Airlines
Wed, Apr 15 - Wed, Apr 22
Japan Airlines Logo
8:54 am - 9:15 pm
STL
-
GMP
22h 21m
2 stops
Japan Airlines Logo
8:00 am - 2:03 pm
GMP
-
STL
20h 03m
2 stops
$1,217Japan Airlines
Thu, Apr 9 - Thu, Apr 16

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
Apr 15
STL4:05 pmLambert-St Louis
35h 25m
1 stop
ICN5:30 pmIncheon Intl
Apr 22
ICN7:05 pmIncheon Intl
34h 20m
1 stop
STL3:25 pmLambert-St Louis
$910
Air Canada
Apr 15
STL4:05 pmLambert-St Louis
34h 00m
2 stops
ICN4:05 pmIncheon Intl
Apr 22
ICN5:45 pmIncheon Intl
35h 40m
2 stops
STL3:25 pmLambert-St Louis
$924
Air Canada
Sep 1
STL8:55 amLambert-St Louis
18h 35m
1 stop
ICN5:30 pmIncheon Intl
Nov 1
ICN8:10 pmIncheon Intl
34h 20m
1 stop
STL3:30 pmLambert-St Louis
$946

Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Apr 11
STL10:07 amLambert-St Louis
27h 53m
1 stop
ICN4:00 amIncheon Intl
May 9
ICN4:25 pmIncheon Intl
21h 34m
1 stop
STL11:59 pmLambert-St Louis
$967
Delta
Apr 16
STL9:26 amLambert-St Louis
17h 54m
1 stop
ICN5:20 pmIncheon Intl
Apr 22
ICN7:20 pmIncheon Intl
19h 05m
1 stop
STL12:25 amLambert-St Louis
$1,016
Delta
Apr 3
STL6:12 pmLambert-St Louis
31h 08m
1 stop
ICN3:20 pmIncheon Intl
May 3
ICN7:40 pmIncheon Intl
17h 33m
1 stop
STL11:13 pmLambert-St Louis
$1,022

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 March 12, 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

Wed 4/15

4:05 pm-5:30 pm

1 stop35h 25m

Incheon Intl

Wed 4/22

7:05 pm-3:25 pm

1 stop34h 20m

$910

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Wed 4/22

5:45 pm-3:25 pm

2 stops35h 40m

$924

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/1

2:40 pm-4:05 pm

2 stops35h 25m

Incheon Intl

Sun 11/1

8:10 pm-3:30 pm

1 stop34h 20m

$946

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Wed 4/22

7:05 pm-3:25 pm

1 stop34h 20m

$947

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/23

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Thu 4/30

7:05 pm-8:25 pm

2 stops39h 20m

$950

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/23

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Thu 4/30

7:05 pm-8:25 pm

2 stops39h 20m

$951

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/11

10:07 am-4:00 am

1 stop27h 53m

Incheon Intl

Sat 5/9

4:25 pm-11:59 pm

1 stop21h 34m

$967

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

2:40 pm-4:20 am

2 stops23h 40m

Incheon Intl

Wed 4/22

4:50 pm-8:25 am

2 stops29h 35m

$971
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 4/15

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Wed 4/22

8:00 am-2:03 pm

2 stops20h 03m

$1,178

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/9

8:54 am-9:15 pm

2 stops22h 21m

Seoul Gimpo Intl

Thu 4/16

8:00 am-2:03 pm

2 stops20h 03m

$1,217

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 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 $1,134 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 18% 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 10m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 18h 10m
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 10m 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
7.1
11,435 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,284 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,421 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,202 reviews
Search Korean Air flights
Air CanadaPriceFrom $1,083Free CancellationRating
7.1
10,800 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