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Cheap flights from St. Louis to Seoul from $549

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 6/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
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
$1,145WestJet
Wed, Sep 16 - Fri, Sep 25
WestJet Logo
1:55 pm - 6:45 pm
STL
-
ICN
38h 50m
2 stops
WestJet Logo
8:45 pm - 4:41 pm
ICN
-
STL
33h 56m
2 stops
$1,148WestJet
Wed, Sep 16 - Fri, Sep 25
Multiple Airlines Logo
6:00 am - 12:25 am
STL
-
ICN
28h 25m
2 stops
Multiple Airlines Logo
8:00 am - 10:55 pm
ICN
-
STL
28h 55m
2 stops
$1,183Multiple Airlines
Tue, Aug 18 - Mon, Aug 31
Qatar Airways Logo
7:00 am - 5:15 pm
STL
-
ICN
43h 15m
2 stops
Qatar Airways Logo
12:20 am - 11:56 pm
ICN
-
STL
38h 36m
2 stops
$1,211Qatar Airways
Mon, Nov 2 - Sun, Nov 8
Multiple Airlines Logo
6:00 am - 12:25 am
STL
-
ICN
28h 25m
2 stops
Multiple Airlines Logo
8:00 am - 11:02 pm
ICN
-
STL
29h 02m
2 stops
$1,233Multiple Airlines
Wed, Sep 2 - Sat, Sep 12
Cathay Pacific Logo
9:31 am - 12:40 pm
STL
-
ICN
37h 09m
2 stops
Cathay Pacific Logo
8:00 am - 8:03 pm
ICN
-
STL
26h 03m
2 stops
$1,243Cathay Pacific
Wed, Sep 2 - Sat, Sep 12
WestJet Logo
5:30 pm - 6:45 pm
STL
-
ICN
35h 15m
2 stops
WestJet Logo
8:45 pm - 3:57 pm
ICN
-
STL
33h 12m
2 stops
$1,246WestJet
Tue, Sep 15 - Tue, Sep 22
Qatar Airways Logo
7:00 am - 5:15 pm
STL
-
ICN
44h 15m
2 stops
Qatar Airways Logo
12:20 am - 11:59 pm
ICN
-
STL
38h 39m
2 stops
$1,251Qatar Airways
Sun, Oct 25 - Fri, Nov 20
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
7:05 pm - 8:00 pm
ICN
-
STL
38h 55m
1 stop
$1,255Air Canada
Wed, Sep 9 - Mon, Sep 14
Air Canada Logo
2:40 pm - 5:30 pm
STL
-
ICN
36h 50m
1 stop
Air Canada Logo
7:05 pm - 2:02 pm
ICN
-
STL
32h 57m
1 stop
$1,260Air Canada
Tue, Aug 4 - Thu, Aug 20

Delta flights from St. Louis to Seoul

Our best Delta deals on St. Louis to Seoul flight tickets
Delta
Jul 27
STL8:48 amLambert-St Louis
18h 32m
1 stop
ICN5:20 pmIncheon Intl
Aug 21
ICN7:20 pmIncheon Intl
19h 21m
1 stop
STL12:41 amLambert-St Louis
$1,420
Delta
Jul 27
STL6:21 amLambert-St Louis
20h 29m
2 stops
ICN4:50 pmIncheon Intl
Aug 21
ICN7:20 pmIncheon Intl
19h 21m
1 stop
STL12:41 amLambert-St Louis
$1,425
Delta
Jul 26
STL5:36 pmLambert-St Louis
33h 44m
1 stop
ICN5:20 pmIncheon Intl
Aug 12
ICN7:20 pmIncheon Intl
19h 21m
1 stop
STL12:41 amLambert-St Louis
$1,426

Air Canada flights from St. Louis to Seoul

Our best Air Canada deals on St. Louis to Seoul flight tickets
Air Canada
Sep 9
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Sep 14
ICN7:05 pmIncheon Intl
38h 55m
1 stop
STL8:00 pmLambert-St Louis
$1,255
Air Canada
Aug 4
STL12:10 pmLambert-St Louis
61h 55m
2 stops
ICN4:05 pmIncheon Intl
Aug 20
ICN5:45 pmIncheon Intl
38h 57m
2 stops
STL6:42 pmLambert-St Louis
$1,260
Air Canada
Aug 4
STL2:40 pmLambert-St Louis
36h 50m
1 stop
ICN5:30 pmIncheon Intl
Aug 20
ICN7:05 pmIncheon Intl
37h 37m
2 stops
STL6:42 pmLambert-St Louis
$1,263

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 May 25, 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

$1,145

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-4:41 pm

2 stops33h 56m

$1,148
Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 8/18

6:00 am-12:25 am

2 stops28h 25m

Incheon Intl

Mon 8/31

8:00 am-10:55 pm

2 stops28h 55m

$1,183

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/2

7:00 am-5:15 pm

2 stops43h 15m

Incheon Intl

Sun 11/8

12:20 am-11:56 pm

2 stops38h 36m

$1,211

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/2

6:00 am-12:25 am

2 stops28h 25m

Incheon Intl

Sat 9/12

8:00 am-11:02 pm

2 stops29h 02m

$1,233

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/2

9:31 am-12:40 pm

2 stops37h 09m

Incheon Intl

Sat 9/12

8:00 am-8:03 pm

2 stops26h 03m

$1,243

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/15

5:30 pm-6:45 pm

2 stops35h 15m

Incheon Intl

Tue 9/22

8:45 pm-3:57 pm

2 stops33h 12m

$1,246

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 10/25

7:00 am-5:15 pm

2 stops44h 15m

Incheon Intl

Fri 11/20

12:20 am-11:59 pm

2 stops38h 39m

$1,251

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 9/9

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Mon 9/14

7:05 pm-8:00 pm

1 stop38h 55m

$1,255

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 8/4

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Thu 8/20

7:05 pm-2:02 pm

1 stop32h 57m

$1,260

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 typical price of a round-trip flight between St. Louis and Seoul?

What is the cheapest month to fly to Seoul?

The month of March is another great option to travel to Seoul, with average flight prices from St. Louis averaging around $745.

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

You could potentially save up to 61% 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 37m

Direct flights

None
The fastest flight from St. Louis to Seoul takes 22h 37m
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 37m 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 $832Free CancellationRating
7.1
11,630 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,428 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,749 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,217 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.

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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