Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Seoul from $379

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 2/13. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
21h 35m
1 stop
Multiple Airlines Logo
7:35 pm - 11:59 pm
ICN
-
STL
18h 24m
1 stop
$847Multiple Airlines
Thu, Apr 16 - Wed, Apr 22
United Airlines Logo
4:15 pm - 4:20 am
STL
-
ICN
22h 05m
2 stops
United Airlines Logo
4:50 pm - 10:48 am
ICN
-
STL
31h 58m
2 stops
$851United Airlines
Sat, May 2 - Sat, May 9
United Airlines Logo
8:30 am - 3:00 pm
STL
-
ICN
40h 30m
1 stop
United Airlines Logo
11:30 am - 6:22 pm
ICN
-
STL
20h 52m
1 stop
$854United Airlines
Sat, May 2 - Wed, May 13
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m
1 stop
United Airlines Logo
11:30 am - 8:54 pm
ICN
-
STL
23h 24m
2 stops
$858United Airlines
Thu, Apr 16 - Wed, Apr 22
United Airlines Logo
8:30 am - 4:20 am
STL
-
ICN
29h 50m
1 stop
United Airlines Logo
11:30 am - 10:30 pm
ICN
-
STL
25h 00m
2 stops
$859United Airlines
Sun, May 3 - Tue, May 12
Delta Logo
6:00 am - 2:10 pm
STL
-
ICN
18h 10m
1 stop
Delta Logo
7:40 pm - 11:01 pm
ICN
-
STL
17h 21m
1 stop
$867Delta
Tue, May 5 - Tue, May 12
Delta Logo
6:12 pm - 4:20 pm
STL
-
ICN
32h 08m
1 stop
Delta Logo
6:00 pm - 11:58 pm
ICN
-
STL
19h 58m
1 stop
$872Delta
Wed, Mar 11 - Wed, Mar 18
United Airlines Logo
5:15 am - 3:15 pm
STL
-
ICN
20h 00m
2 stops
United Airlines Logo
11:45 am - 9:07 pm
ICN
-
STL
23h 22m
2 stops
$897United Airlines
Thu, Mar 12 - Thu, Mar 19
Japan Airlines Logo
8:53 am - 10:45 am
STL
-
GMP
35h 52m
2 stops
Japan Airlines Logo
7:55 am - 10:14 pm
GMP
-
STL
28h 19m
2 stops
$1,171Japan Airlines
Thu, Apr 16 - Wed, Apr 22
Japan Airlines Logo
8:53 am - 10:45 am
STL
-
GMP
35h 52m
2 stops
Japan Airlines Logo
7:55 am - 10:14 pm
GMP
-
STL
28h 19m
2 stops
$1,172Japan Airlines
Thu, Apr 16 - Wed, Apr 22

Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
May 5
STL6:00 amLambert-St Louis
18h 10m
1 stop
ICN2:10 pmIncheon Intl
May 11
ICN4:25 pmIncheon Intl
18h 24m
1 stop
STL8:49 pmLambert-St Louis
$867
Delta
Feb 2
STL6:57 pmLambert-St Louis
29h 33m
2 stops
ICN3:30 pmIncheon Intl
Feb 12
ICN8:05 pmIncheon Intl
18h 18m
2 stops
STL11:23 pmLambert-St Louis
$871
Delta
Mar 11
STL6:12 pmLambert-St Louis
32h 08m
1 stop
ICN4:20 pmIncheon Intl
Mar 18
ICN6:00 pmIncheon Intl
19h 58m
1 stop
STL11:58 pmLambert-St Louis
$872

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Jan 29
STL2:45 pmLambert-St Louis
23h 55m
2 stops
ICN5:40 amIncheon Intl
Jan 31
ICN6:00 pmIncheon Intl
26h 11m
1 stop
STL5:11 amLambert-St Louis
$851
United Airlines
May 2
STL8:30 amLambert-St Louis
40h 30m
1 stop
ICN3:00 pmIncheon Intl
May 15
ICN4:50 pmIncheon Intl
26h 57m
1 stop
STL5:47 amLambert-St Louis
$854
United Airlines
Apr 16
STL8:30 amLambert-St Louis
29h 50m
1 stop
ICN4:20 amIncheon Intl
Apr 22
ICN11:30 amIncheon Intl
23h 24m
2 stops
STL8:54 pmLambert-St Louis
$858

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 27, 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 4/16

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/22

7:35 pm-11:59 pm

1 stop18h 24m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 5/2

4:15 pm-4:20 am

2 stops22h 05m

Incheon Intl

Sat 5/9

4:50 pm-10:48 am

2 stops31h 58m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 5/2

8:30 am-3:00 pm

1 stop40h 30m

Incheon Intl

Wed 5/13

11:30 am-6:22 pm

1 stop20h 52m

$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

11:30 am-8:54 pm

2 stops23h 24m

$858

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 5/3

8:30 am-4:20 am

1 stop29h 50m

Incheon Intl

Tue 5/12

11:30 am-10:30 pm

2 stops25h 00m

$859

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 5/5

6:00 am-2:10 pm

1 stop18h 10m

Incheon Intl

Tue 5/12

7:40 pm-11:01 pm

1 stop17h 21m

$867

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/11

6:12 pm-4:20 pm

1 stop32h 08m

Incheon Intl

Wed 3/18

6:00 pm-11:58 pm

1 stop19h 58m

$872

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/12

5:15 am-3:15 pm

2 stops20h 00m

Incheon Intl

Thu 3/19

11:45 am-9:07 pm

2 stops23h 22m

$897

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:53 am-10:45 am

2 stops35h 52m

Seoul Gimpo Intl

Wed 4/22

7:55 am-10:14 pm

2 stops28h 19m

$1,171

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:53 am-10:45 am

2 stops35h 52m

Seoul Gimpo Intl

Wed 4/22

7:55 am-10:14 pm

2 stops28h 19m

$1,172

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $1,098 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

19h 45m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 19h 45m
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 45m 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
10,660 reviews
Search Air Canada flights
American AirlinesPriceFrom $846Free CancellationRating
7.2
11,197 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,119 reviews
Search Delta flights
United AirlinesPriceFrom $870Free CancellationRating
7.4
9,205 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.

An easier way to manage your Seoul trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 2/26
Thu 3/5
By creating a price alert you accept our terms of use and privacy policy.

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