Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to Seoul from $446

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 8/13. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
1:55 pm - 6:45 pm
STL
-
ICN
38h 50m
2 stops
WestJet Logo
8:45 pm - 9:34 am
ICN
-
STL
26h 49m
2 stops
$1,036WestJet
Wed, Sep 16 - Fri, Sep 25
WestJet Logo
6:00 am - 6:45 pm
STL
-
ICN
46h 45m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
40h 33m
2 stops
$1,061WestJet
Fri, Oct 16 - Sun, Oct 25
WestJet Logo
1:55 pm - 6:45 pm
STL
-
ICN
38h 50m
2 stops
WestJet Logo
8:45 pm - 2:49 pm
ICN
-
STL
32h 04m
2 stops
$1,065WestJet
Wed, Sep 16 - Fri, Sep 25
WestJet Logo
5:45 pm - 6:45 pm
STL
-
ICN
59h 00m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
40h 33m
2 stops
$1,070WestJet
Mon, Oct 12 - Tue, Oct 27
Air Canada Logo
4:15 pm - 5:25 pm
STL
-
ICN
35h 10m
1 stop
Air Canada Logo
8:10 pm - 3:30 pm
ICN
-
STL
34h 20m
1 stop
$1,205Air Canada
Mon, Oct 26 - Wed, Nov 25
Air Canada Logo
2:40 pm - 4:05 pm
STL
-
ICN
35h 25m
2 stops
Air Canada Logo
6:55 pm - 3:30 pm
ICN
-
STL
35h 35m
2 stops
$1,206Air Canada
Mon, Oct 19 - Wed, Nov 18
Japan Airlines Logo
9:32 am - 9:15 pm
STL
-
GMP
21h 43m
2 stops
Japan Airlines Logo
12:05 pm - 11:40 pm
GMP
-
STL
25h 35m
2 stops
$1,414Japan Airlines
Tue, Sep 8 - Tue, Sep 15
Multiple Airlines Logo
3:19 pm - 12:50 pm
STL
-
GMP
31h 31m
2 stops
Multiple Airlines Logo
1:50 pm - 11:59 pm
GMP
-
STL
48h 09m
2 stops
$1,416Multiple Airlines
Thu, Oct 1 - Sat, Oct 10
Japan Airlines Logo
9:32 am - 9:15 pm
STL
-
GMP
21h 43m
2 stops
Japan Airlines Logo
12:05 pm - 10:59 pm
GMP
-
STL
24h 54m
2 stops
$1,475Japan Airlines
Mon, Aug 10 - Tue, Aug 25
Multiple Airlines Logo
8:55 am - 10:20 pm
STL
-
GMP
23h 25m
2 stops
Multiple Airlines Logo
8:40 am - 8:22 pm
GMP
-
STL
25h 42m
2 stops
$1,662Multiple Airlines
Wed, Jul 29 - Thu, Aug 20

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

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
Sep 8
STL2:40 pmLambert-St Louis
36h 50m
1 stop
ICN5:30 pmIncheon Intl
Sep 15
ICN5:45 pmIncheon Intl
34h 15m
2 stops
STL2:00 pmLambert-St Louis
$1,206
Air Canada
Sep 7
STL12:10 pmLambert-St Louis
37h 55m
2 stops
ICN4:05 pmIncheon Intl
Sep 23
ICN5:45 pmIncheon Intl
40h 35m
2 stops
STL8:20 pmLambert-St Louis
$1,211
Air Canada
Sep 16
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Sep 25
ICN6:00 pmIncheon Intl
34h 00m
2 stops
STL2:00 pmLambert-St Louis
$1,241

United Airlines flights from St. Louis to Seoul

Our best United Airlines deals on St. Louis to Seoul flight tickets
United Airlines
Aug 10
STL7:23 pmLambert-St Louis
18h 57m
1 stop
ICN4:20 amIncheon Intl
Aug 25
ICN11:30 amIncheon Intl
24h 30m
2 stops
STL10:00 pmLambert-St Louis
$1,400
United Airlines
Jul 27
STL4:48 pmLambert-St Louis
21h 32m
2 stops
ICN4:20 amIncheon Intl
Aug 20
ICN11:30 amIncheon Intl
19h 04m
2 stops
STL4:34 pmLambert-St Louis
$1,464
United Airlines
Jul 26
STL7:23 pmLambert-St Louis
29h 37m
1 stop
ICN3:00 pmIncheon Intl
Aug 18
ICN11:30 amIncheon Intl
19h 04m
2 stops
STL4:34 pmLambert-St Louis
$1,475

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 June 22, 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 9/16

1:55 pm-6:45 pm

2 stops38h 50m

Incheon Intl

Fri 9/25

8:45 pm-9:34 am

2 stops26h 49m

$1,036

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/16

6:00 am-6:45 pm

2 stops46h 45m

Incheon Intl

Sun 10/25

8:45 pm-11:18 pm

2 stops40h 33m

$1,061

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/16

1:55 pm-6:45 pm

2 stops38h 50m

Incheon Intl

Fri 9/25

8:45 pm-2:49 pm

2 stops32h 04m

$1,065

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/12

5:45 pm-6:45 pm

2 stops59h 00m

Incheon Intl

Tue 10/27

8:45 pm-11:18 pm

2 stops40h 33m

$1,070

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

4:15 pm-5:25 pm

1 stop35h 10m

Incheon Intl

Wed 11/25

8:10 pm-3:30 pm

1 stop34h 20m

$1,205

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/19

2:40 pm-4:05 pm

2 stops35h 25m

Incheon Intl

Wed 11/18

6:55 pm-3:30 pm

2 stops35h 35m

$1,206

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 9/8

9:32 am-9:15 pm

2 stops21h 43m

Seoul Gimpo Intl

Tue 9/15

12:05 pm-11:40 pm

2 stops25h 35m

$1,414

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 10/1

3:19 pm-12:50 pm

2 stops31h 31m

Seoul Gimpo Intl

Sat 10/10

1:50 pm-11:59 pm

2 stops48h 09m

$1,416
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 8/10

9:32 am-9:15 pm

2 stops21h 43m

Seoul Gimpo Intl

Tue 8/25

12:05 pm-10:59 pm

2 stops24h 54m

$1,475

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 7/29

8:55 am-10:20 pm

2 stops23h 25m

Seoul Gimpo Intl

Thu 8/20

8:40 am-8:22 pm

2 stops25h 42m

$1,662

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 April is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $751.

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

You could potentially save up to 43% 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

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 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
DeltaPriceFrom $846Free CancellationRating
7.8
8,421 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,874 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,218 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.

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
Wed 7/22
Wed 7/29
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