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Cheap flights from St. Louis to Seoul from $525

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 5/26. 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 - Mon, Oct 5
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
$1,135Air Canada
Sat, Aug 22 - Tue, Nov 24
Air Canada Logo
8:55 am - 5:30 pm
STL
-
ICN
18h 35m
1 stop
Air Canada Logo
5:45 pm - 2:00 pm
ICN
-
STL
34h 15m
2 stops
$1,144Air Canada
Thu, Sep 17 - Thu, Oct 1
Air Canada Logo
12:10 pm - 4:05 pm
STL
-
ICN
37h 55m
2 stops
Air Canada Logo
5:45 pm - 6:41 pm
ICN
-
STL
38h 56m
2 stops
$1,145Air Canada
Wed, Sep 30 - Tue, Oct 20
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
$1,150Air Canada
Sat, Aug 22 - Mon, Nov 23
Air Canada Logo
2:40 pm - 5:30 pm
STL
-
ICN
36h 50m
1 stop
Air Canada Logo
6:55 pm - 3:30 pm
ICN
-
STL
35h 35m
2 stops
$1,154Air Canada
Tue, Oct 20 - Tue, Nov 3
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
8:30 am - 9:15 pm
STL
-
GMP
22h 45m
2 stops
Japan Airlines Logo
8:00 am - 11:05 pm
GMP
-
STL
29h 05m
2 stops
$1,492Japan Airlines
Tue, Sep 22 - Mon, Oct 5
Multiple Airlines Logo
5:40 am - 5:55 pm
STL
-
GMP
22h 15m
2 stops
Multiple Airlines Logo
8:00 am - 6:14 pm
GMP
-
STL
24h 14m
2 stops
$1,565Multiple Airlines
Wed, Oct 14 - Mon, Oct 19
Japan Airlines Logo
6:30 am - 9:15 pm
STL
-
GMP
24h 45m
2 stops
Japan Airlines Logo
12:05 pm - 11:42 pm
GMP
-
STL
26h 37m
2 stops
$1,649Japan Airlines
Tue, Oct 20 - Tue, Nov 3

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American Airlines flights from St. Louis to Seoul

Our best American Airlines deals on St. Louis to Seoul flight tickets
American Airlines
Aug 22
STL6:42 amLambert-St Louis
19h 03m
1 stop
ICN3:45 pmIncheon Intl
Nov 15
ICN6:35 pmIncheon Intl
29h 23m
1 stop
STL8:58 amLambert-St Louis
$1,273
American Airlines
Aug 22
STL5:00 amLambert-St Louis
20h 45m
2 stops
ICN3:45 pmIncheon Intl
Nov 15
ICN6:35 pmIncheon Intl
29h 23m
1 stop
STL8:58 amLambert-St Louis
$1,278
American Airlines
Oct 14
STL5:40 amLambert-St Louis
20h 05m
1 stop
ICN3:45 pmIncheon Intl
Oct 19
ICN5:50 pmIncheon Intl
18h 10m
1 stop
STL10:00 pmLambert-St Louis
$1,318

Asiana Airlines flights from St. Louis to Seoul

Our best Asiana Airlines deals on St. Louis to Seoul flight tickets
Asiana Airlines
Aug 22
STL2:40 pmLambert-St Louis
36h 50m
1 stop
ICN5:30 pmIncheon Intl
Nov 22
ICN6:55 pmIncheon Intl
35h 35m
2 stops
STL3:30 pmLambert-St Louis
$1,276
Asiana Airlines
Sep 30
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Oct 20
ICN5:45 pmIncheon Intl
34h 15m
2 stops
STL2:00 pmLambert-St Louis
$1,285
Asiana Airlines
Sep 30
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Oct 21
ICN7:05 pmIncheon Intl
32h 55m
1 stop
STL2:00 pmLambert-St Louis
$1,301

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 29, 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

Mon 10/5

5:45 pm-2:00 pm

2 stops34h 15m

$1,129

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 8/22

12:10 pm-4:05 pm

2 stops61h 55m

Incheon Intl

Tue 11/24

6:55 pm-3:30 pm

2 stops35h 35m

$1,135

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

5:45 pm-2:00 pm

2 stops34h 15m

$1,144

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/30

12:10 pm-4:05 pm

2 stops37h 55m

Incheon Intl

Tue 10/20

5:45 pm-6:41 pm

2 stops38h 56m

$1,145

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 8/22

12:10 pm-4:05 pm

2 stops61h 55m

Incheon Intl

Mon 11/23

6:55 pm-3:30 pm

2 stops35h 35m

$1,150

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 10/20

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Tue 11/3

6:55 pm-3:30 pm

2 stops35h 35m

$1,154

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

8:30 am-9:15 pm

2 stops22h 45m

Seoul Gimpo Intl

Mon 10/5

8:00 am-11:05 pm

2 stops29h 05m

$1,492
Quickest round-trip

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 10/14

5:40 am-5:55 pm

2 stops22h 15m

Seoul Gimpo Intl

Mon 10/19

8:00 am-6:14 pm

2 stops24h 14m

$1,565

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 10/20

6:30 am-9:15 pm

2 stops24h 45m

Seoul Gimpo Intl

Tue 11/3

12:05 pm-11:42 pm

2 stops26h 37m

$1,649

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

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

20h 43m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 20h 43m
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. 20h 43m 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
11,678 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,466 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,680 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