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Cheap flights from St. Louis to Seoul from $586

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 10/31. 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

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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.
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 9 - Sun, Nov 15
Air Canada Logo
2:40 pm - 5:30 pm
STL
-
ICN
36h 50m
1 stop
Air Canada Logo
6:00 pm - 6:41 pm
ICN
-
STL
38h 41m
1 stop
$1,256Air Canada
Tue, Sep 22 - Wed, Oct 7
Air Canada Logo
4:15 pm - 5:10 pm
STL
-
ICN
33h 55m
2 stops
Air Canada Logo
8:10 pm - 3:30 pm
ICN
-
STL
34h 20m
1 stop
$1,261Air Canada
Mon, Nov 9 - Mon, Nov 16
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
7:05 pm - 8:07 pm
ICN
-
STL
39h 02m
1 stop
$1,266Air Canada
Wed, Aug 5 - Wed, Aug 19
Asiana Airlines Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Asiana Airlines Logo
7:05 pm - 2:02 pm
ICN
-
STL
32h 57m
1 stop
$1,269Asiana Airlines
Wed, Aug 5 - Tue, Aug 18
Air Canada Logo
4:15 pm - 5:10 pm
STL
-
ICN
33h 55m
2 stops
Air Canada Logo
6:55 pm - 3:30 pm
ICN
-
STL
35h 35m
2 stops
$1,271Air Canada
Mon, Nov 9 - Mon, Nov 16
Asiana Airlines Logo
2:40 pm - 5:30 pm
STL
-
ICN
36h 50m
1 stop
Asiana Airlines Logo
7:05 pm - 2:02 pm
ICN
-
STL
32h 57m
1 stop
$1,273Asiana Airlines
Tue, Aug 4 - Wed, Aug 19
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
8:10 pm - 3:30 pm
ICN
-
STL
34h 20m
1 stop
$1,288Air Canada
Mon, Aug 24 - Mon, Nov 16
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
7:05 pm - 8:07 pm
ICN
-
STL
39h 02m
1 stop
$1,298Air Canada
Sun, Aug 9 - Sat, Aug 15
Air Canada Logo
2:40 pm - 5:30 pm
STL
-
ICN
36h 50m
1 stop
Air Canada Logo
7:05 pm - 8:07 pm
ICN
-
STL
39h 02m
1 stop
$1,303Air Canada
Tue, Aug 4 - Fri, Aug 21

Asiana Airlines flights from St. Louis to Incheon Intl Airport

Our best Asiana Airlines deals on St. Louis to Incheon Intl Airport flight tickets
Asiana Airlines
Aug 5
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Aug 18
ICN7:05 pmIncheon Intl
32h 57m
1 stop
STL2:02 pmLambert-St Louis
$1,269
Asiana Airlines
Aug 4
STL2:40 pmLambert-St Louis
36h 50m
1 stop
ICN5:30 pmIncheon Intl
Aug 19
ICN7:05 pmIncheon Intl
32h 57m
1 stop
STL2:02 pmLambert-St Louis
$1,273
Asiana Airlines
Aug 5
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Aug 21
ICN7:05 pmIncheon Intl
32h 57m
1 stop
STL2:02 pmLambert-St Louis
$1,311

Alaska Airlines flights from St. Louis to Incheon Intl Airport

Our best Alaska Airlines deals on St. Louis to Incheon Intl Airport flight tickets
Alaska Airlines
Oct 29
STL4:40 pmLambert-St Louis
34h 55m
1 stop
ICN5:35 pmIncheon Intl
Nov 7
ICN8:00 pmIncheon Intl
33h 15m
1 stop
STL2:15 pmLambert-St Louis
$1,440
Alaska Airlines
Oct 29
STL7:00 amLambert-St Louis
20h 35m
1 stop
ICN5:35 pmIncheon Intl
Nov 7
ICN8:00 pmIncheon Intl
33h 26m
1 stop
STL2:26 pmLambert-St Louis
$1,455

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 May 13, 2026.
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

Cheapest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/9

7:00 am-5:15 pm

2 stops43h 15m

Incheon Intl

Sun 11/15

12:20 am-11:56 pm

2 stops38h 36m

$1,211

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/22

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Wed 10/7

6:00 pm-6:41 pm

1 stop38h 41m

$1,256
Quickest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/9

4:15 pm-5:10 pm

2 stops33h 55m

Incheon Intl

Mon 11/16

8:10 pm-3:30 pm

1 stop34h 20m

$1,261

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 8/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Wed 8/19

7:05 pm-8:07 pm

1 stop39h 02m

$1,266

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 8/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Tue 8/18

7:05 pm-2:02 pm

1 stop32h 57m

$1,269

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/9

4:15 pm-5:10 pm

2 stops33h 55m

Incheon Intl

Mon 11/16

6:55 pm-3:30 pm

2 stops35h 35m

$1,271

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 8/4

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Wed 8/19

7:05 pm-2:02 pm

1 stop32h 57m

$1,273

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 8/24

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Mon 11/16

8:10 pm-3:30 pm

1 stop34h 20m

$1,288

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 8/9

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Sat 8/15

7:05 pm-8:07 pm

1 stop39h 02m

$1,298

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 8/4

2:40 pm-5:30 pm

1 stop36h 50m

Incheon Intl

Fri 8/21

7:05 pm-8:07 pm

1 stop39h 02m

$1,303

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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 typical price of a round-trip flight between St. Louis and Incheon Intl Airport?

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 December. Flight prices, which tend to average around $846, 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 December, then departing from St. Louis during the month February is also very affordable. Most momondo users find prices during this month for around $865.

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

Fastest flight time

18h 57m

Direct flights

None
The fastest flight from St. Louis to Incheon Intl Airport takes 18h 57m
There are no direct flights from St. Louis to Incheon Intl Airport. There are no popular flight routes from St. Louis to Incheon Intl Airport.
Search flight deals

Frequently asked questions about flying from St. Louis to Incheon Intl Airport

  • 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 57m.

  • 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
American AirlinesPriceFrom $832Free CancellationRating
7.1
11,662 reviews
Search American Airlines flights
DeltaPriceFrom $846Free CancellationRating
7.9
8,450 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,706 reviews
Search United Airlines flights

Traveling to a place near Seoul?

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