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Cheap flights from St. Louis to Seoul from $583

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 5/11. 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.

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
2:40 pm - 4:05 pm
STL
-
ICN
35h 25m
2 stops
Air Canada Logo
5:45 pm - 2:00 pm
ICN
-
STL
34h 15m
2 stops
$1,129Air Canada
Tue, Sep 22 - Tue, Oct 6
Air Canada Logo
12:10 pm - 4:05 pm
STL
-
ICN
61h 55m
2 stops
Air Canada Logo
5:45 pm - 6:41 pm
ICN
-
STL
38h 56m
2 stops
$1,161Air Canada
Sat, Aug 15 - Wed, Sep 16
Air Canada Logo
12:10 pm - 4:05 pm
STL
-
ICN
61h 55m
2 stops
Air Canada Logo
7:05 pm - 2:00 pm
ICN
-
STL
32h 55m
1 stop
$1,166Air Canada
Sat, Aug 15 - Wed, Sep 16
Air Canada Logo
8:55 am - 5:30 pm
STL
-
ICN
18h 35m
1 stop
Air Canada Logo
7:05 pm - 8:00 pm
ICN
-
STL
38h 55m
1 stop
$1,170Air Canada
Thu, Sep 17 - Thu, Oct 1
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
$1,172Air Canada
Sun, Sep 6 - Sun, Nov 22
Air Canada Logo
8:55 am - 5:30 pm
STL
-
ICN
18h 35m
1 stop
Air Canada Logo
7:05 pm - 8:00 pm
ICN
-
STL
38h 55m
1 stop
$1,174Air Canada
Thu, Sep 17 - Thu, Oct 1
Multiple Airlines Logo
7:56 pm - 7:15 pm
STL
-
GMP
33h 19m
2 stops
Multiple Airlines Logo
1:50 pm - 2:04 pm
GMP
-
STL
38h 14m
2 stops
$1,350Multiple Airlines
Mon, Aug 10 - Sat, Sep 5
Japan Airlines Logo
9:47 am - 9:15 pm
STL
-
GMP
21h 28m
2 stops
Japan Airlines Logo
8:00 am - 11:59 pm
GMP
-
STL
29h 59m
2 stops
$1,365Japan Airlines
Wed, Oct 7 - Wed, Oct 14
Japan Airlines Logo
8:30 am - 9:15 pm
STL
-
GMP
22h 45m
2 stops
Japan Airlines Logo
12:05 pm - 11:05 pm
GMP
-
STL
25h 00m
2 stops
$1,417Japan Airlines
Tue, Sep 22 - Tue, Oct 6
Japan Airlines Logo
7:44 am - 9:15 pm
STL
-
GMP
23h 31m
2 stops
Japan Airlines Logo
8:00 am - 11:05 pm
GMP
-
STL
29h 05m
2 stops
$1,485Japan Airlines
Tue, Sep 22 - Mon, Oct 5

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Cathay Pacific flights from St. Louis to Seoul

Our best Cathay Pacific deals on St. Louis to Seoul flight tickets
Cathay Pacific
Aug 17
STL7:23 amLambert-St Louis
39h 17m
2 stops
ICN12:40 pmIncheon Intl
Aug 30
ICN1:55 amIncheon Intl
35h 00m
2 stops
STL10:55 pmLambert-St Louis
$1,315
Cathay Pacific
Apr 28
STL5:51 amLambert-St Louis
40h 49m
2 stops
ICN12:40 pmIncheon Intl
May 5
ICN3:10 pmIncheon Intl
46h 47m
2 stops
STL11:57 pmLambert-St Louis
$1,324
Cathay Pacific
Oct 16
STL3:33 pmLambert-St Louis
42h 52m
2 stops
ICN12:25 amIncheon Intl
Oct 25
ICN1:45 pmIncheon Intl
47h 20m
2 stops
STL11:05 pmLambert-St Louis
$1,365

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
Sep 22
STL2:40 pmLambert-St Louis
36h 50m
1 stop
ICN5:30 pmIncheon Intl
Oct 6
ICN5:45 pmIncheon Intl
34h 15m
2 stops
STL2:00 pmLambert-St Louis
$1,129
Air Canada
Aug 15
STL12:10 pmLambert-St Louis
61h 55m
2 stops
ICN4:05 pmIncheon Intl
Sep 16
ICN5:45 pmIncheon Intl
38h 56m
2 stops
STL6:41 pmLambert-St Louis
$1,161
Air Canada
Aug 15
STL12:10 pmLambert-St Louis
61h 55m
2 stops
ICN4:05 pmIncheon Intl
Sep 16
ICN7:05 pmIncheon Intl
32h 55m
1 stop
STL2:00 pmLambert-St Louis
$1,166

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 April 26, 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

Tue 9/22

2:40 pm-4:05 pm

2 stops35h 25m

Incheon Intl

Tue 10/6

5:45 pm-2:00 pm

2 stops34h 15m

$1,129

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 8/15

12:10 pm-4:05 pm

2 stops61h 55m

Incheon Intl

Wed 9/16

5:45 pm-6:41 pm

2 stops38h 56m

$1,161

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 8/15

12:10 pm-4:05 pm

2 stops61h 55m

Incheon Intl

Wed 9/16

7:05 pm-2:00 pm

1 stop32h 55m

$1,166

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/17

8:55 am-5:30 pm

1 stop18h 35m

Incheon Intl

Thu 10/1

7:05 pm-8:00 pm

1 stop38h 55m

$1,170

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/6

2:40 pm-4:05 pm

2 stops35h 25m

Incheon Intl

Sun 11/22

6:55 pm-3:30 pm

2 stops35h 35m

$1,172

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/17

8:55 am-5:30 pm

1 stop18h 35m

Incheon Intl

Thu 10/1

7:05 pm-8:00 pm

1 stop38h 55m

$1,174

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 8/10

7:56 pm-7:15 pm

2 stops33h 19m

Seoul Gimpo Intl

Sat 9/5

1:50 pm-2:04 pm

2 stops38h 14m

$1,350

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 10/7

9:47 am-9:15 pm

2 stops21h 28m

Seoul Gimpo Intl

Wed 10/14

8:00 am-11:59 pm

2 stops29h 59m

$1,365
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 9/22

8:30 am-9:15 pm

2 stops22h 45m

Seoul Gimpo Intl

Tue 10/6

12:05 pm-11:05 pm

2 stops25h 00m

$1,417

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 9/22

7:44 am-9:15 pm

2 stops23h 31m

Seoul Gimpo Intl

Mon 10/5

8:00 am-11:05 pm

2 stops29h 05m

$1,485

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
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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 from St. Louis 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 $1,141 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 $802 on momondo.

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

22h 07m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 22h 07m
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. 22h 07m 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
11,673 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,459 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,657 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

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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