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Cheap flights from St. Louis to Seoul from $448

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 10/19. 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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Cheap round-trip flights

American Airlines Logo
7:41 pm - 3:30 pmSTL-ICN
29h 49m1 stop
American Airlines Logo
5:25 pm - 10:27 pmICN-STL
19h 02m1 stop
$848American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
American Airlines Logo
7:59 pm - 3:30 pmSTL-ICN
29h 31m2 stops
American Airlines Logo
5:25 pm - 8:05 amICN-STL
28h 40m2 stops
$851American Airlines
Find Deal
Mon, Sep 1 - Sat, Sep 20
United Airlines Logo
5:29 pm - 5:40 amSTL-ICN
21h 11m1 stop
United Airlines Logo
6:00 pm - 3:46 pmICN-STL
36h 46m2 stops
$855United Airlines
Find Deal
Mon, Nov 10 - Thu, Nov 27
United Airlines Logo
5:49 pm - 4:20 amSTL-ICN
20h 31m1 stop
United Airlines Logo
11:30 am - 4:54 pmICN-STL
19h 24m1 stop
$856United Airlines
Find Deal
Mon, Sep 1 - Tue, Sep 30
Delta Logo
6:30 am - 3:30 pmSTL-ICN
18h 00m1 stop
Delta Logo
8:05 pm - 12:37 amICN-STL
19h 32m2 stops
$871Delta
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Tue, Nov 25 - Wed, Dec 3
Delta Logo
1:30 pm - 5:45 amSTL-ICN
25h 15m1 stop
Delta Logo
7:30 pm - 11:02 pmICN-STL
18h 32m1 stop
$945Delta
Find Deal
Sun, Nov 23 - Mon, Dec 1
Air Canada Logo
1:30 pm - 4:05 pmSTL-ICN
36h 35m2 stops
Air Canada Logo
6:00 pm - 3:18 pmICN-STL
35h 18m2 stops
$1,029Air Canada
Find Deal
Thu, Sep 18 - Wed, Sep 24
Air Canada Logo
4:05 pm - 5:10 pmSTL-ICN
34h 05m2 stops
Air Canada Logo
6:55 pm - 3:29 pmICN-STL
35h 34m2 stops
$1,073Air Canada
Find Deal
Fri, Nov 21 - Sat, Nov 29
Logo
1:30 pm - 4:05 pmSTL-ICN
36h 35m2 stops
Logo
6:00 pm - 10:50 amICN-STL
30h 50m3 stops
$1,121
Find Deal
Thu, Sep 18 - Wed, Sep 24
Logo
4:05 pm - 4:05 pmSTL-ICN
34h 00m2 stops
Logo
5:45 pm - 10:50 amICN-STL
31h 05m3 stops
$1,259
Find Deal
Sat, Sep 13 - Sat, Sep 20

American Airlines flights from St. Louis to Incheon Intl Airport

Our best American Airlines deals on St. Louis to Incheon Intl Airport flight tickets
American Airlines
Sep 1
STL7:41 pmLambert-St Louis
29h 49m
1 stop
ICN3:30 pmIncheon Intl
Sep 20
ICN5:25 pmIncheon Intl
19h 02m
1 stop
STL10:27 pmLambert-St Louis
$848
Find similar
American Airlines
Sep 1
STL7:59 pmLambert-St Louis
29h 31m
2 stops
ICN3:30 pmIncheon Intl
Sep 20
ICN5:25 pmIncheon Intl
28h 40m
2 stops
STL8:05 amLambert-St Louis
$851
Find similar
American Airlines
Aug 6
STL5:15 amLambert-St Louis
20h 15m
1 stop
ICN3:30 pmIncheon Intl
Aug 18
ICN5:25 pmIncheon Intl
19h 49m
1 stop
STL11:14 pmLambert-St Louis
$915
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Qatar Airways flights from St. Louis to Incheon Intl Airport

Our best Qatar Airways deals on St. Louis to Incheon Intl Airport flight tickets
Qatar Airways
Aug 6
STL5:52 pmLambert-St Louis
33h 13m
2 stops
ICN5:05 pmIncheon Intl
Aug 17
ICN1:20 amIncheon Intl
36h 39m
2 stops
STL11:59 pmLambert-St Louis
$1,961
Find similar
Qatar Airways
Aug 6
STL12:20 pmLambert-St Louis
38h 45m
2 stops
ICN5:05 pmIncheon Intl
Aug 17
ICN1:20 amIncheon Intl
36h 39m
2 stops
STL11:59 pmLambert-St Louis
$2,131
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momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Incheon Intl Airport 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 July 31, 2025.
Use the filters below to find and compare flights from St. Louis to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:41 pm-3:30 pm

1 stop29h 49m

Incheon Intl

Sat 9/20

5:25 pm-10:27 pm

1 stop19h 02m

$848

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

Sat 9/20

5:25 pm-8:05 am

2 stops28h 40m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

5:29 pm-5:40 am

1 stop21h 11m

Incheon Intl

Thu 11/27

6:00 pm-3:46 pm

2 stops36h 46m

$855

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:49 pm-4:20 am

1 stop20h 31m

Incheon Intl

Tue 9/30

11:30 am-4:54 pm

1 stop19h 24m

$856

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 11/25

6:30 am-3:30 pm

1 stop18h 00m

Incheon Intl

Wed 12/3

8:05 pm-12:37 am

2 stops19h 32m

$871

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 11/23

1:30 pm-5:45 am

1 stop25h 15m

Incheon Intl

Mon 12/1

7:30 pm-11:02 pm

1 stop18h 32m

$945

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-3:18 pm

2 stops35h 18m

$1,029

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 11/21

4:05 pm-5:10 pm

2 stops34h 05m

Incheon Intl

Sat 11/29

6:55 pm-3:29 pm

2 stops35h 34m

$1,073

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-10:50 am

3 stops30h 50m

$1,121

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/13

4:05 pm-4:05 pm

2 stops34h 00m

Incheon Intl

Sat 9/20

5:45 pm-10:50 am

3 stops31h 05m

$1,259

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 Incheon Intl Airport

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 cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from St. Louis is in January. Flight prices, which tend to average around $902, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of January, then departing from St. Louis during the month March is also very affordable. Most momondo users find prices during this month for around $938.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from St. Louis to Incheon Intl Airport is on a Wednesday when prices can be found for as low as $1,462. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,782. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

In the afternoon is the cheapest time of day to fly from St. Louis to Incheon Intl Airport when you can find flight prices for as low as $1,485. Flying to Incheon Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $1,718 on average. Flights to Incheon Intl Airport from St. Louis at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,260 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from St. Louis for as low as $1,068 on momondo.

When to book flights from St. Louis to Incheon Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Incheon Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Incheon Intl Airport (STL to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Incheon Intl Airport

Best Price Found

$448

Fastest flight time

18h 00m

Direct flights

None
The best one-way flight to Incheon Intl Airport from St. Louis in the past 72 hours is $448. The best round-trip flight deal from St. Louis to Incheon Intl Airport found on momondo in the last 72 hours is $848.
The fastest flight from St. Louis to Incheon Intl Airport takes 18h 00m
There are no direct flights from St. Louis to Incheon Intl Airport. Popular non-direct route for this connection is Lambert-St Louis Airport - Incheon Intl Airport.
Search flight deals

  • How far is Lambert-St Louis to Incheon Intl by plane?

    The straight-line distance from Lambert-St Louis to Incheon Intl is 6682.0 mi. By plane, this route typically takes 18h 00m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Incheon Intl Airport?

    Prices for flights from Lambert-St Louis Airport to Incheon Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Incheon Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to Incheon Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Incheon Intl Airport.

  • What documentation or ID do you need to fly to Incheon Intl Airport?

    The travel and health documents required for your trip to Incheon Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Incheon Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from St. Louis to Incheon Intl Airport?

Best airlines flying from St. Louis to Incheon Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Incheon Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom $799Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights
DeltaPriceFrom $896Free CancellationRating
8.0
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $902Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
American AirlinesPriceFrom $977Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Korean AirPriceFrom $1,080Free CancellationRating
8.4
1,121 reviews
Search Korean Air flights

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Suwon
Seongnam
Daejeon
Anyang

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Seoul?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Seoul. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Seoul flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Seoul?

Once you have performed a search for St. Louis to Seoul flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Seoul now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seoul and let you know when they change.

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