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Cheap flights from St. Louis to Seoul from $524

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 10/14. 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
1 adult, Economy, 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
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
8:10 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
34h 16m1 stop Toronto Pearson Intl
$1,018Air Canada
Mon, Oct 5 - Wed, Nov 4
Air Canada Logo
12:10 pm - 4:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
38h 15m1 stop Montreal Pierre Elliott Trudeau Intl
Air Canada Logo
6:55 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
35h 31m2 stops Vancouver Intl Toronto Pearson Intl
$1,018Air Canada
Mon, Oct 5 - Wed, Nov 4
Asiana Airlines Logo
4:05 pm - 4:10 pmSTL  Lambert-St Louis-ICN Incheon Intl
34h 05m2 stops Toronto Pearson Intl Vancouver Intl
Asiana Airlines Logo
6:55 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
35h 31m2 stops Vancouver Intl Toronto Pearson Intl
$1,082Asiana Airlines
Wed, Oct 28 - Tue, Nov 3
Asiana Airlines Logo
4:05 pm - 5:25 pmSTL  Lambert-St Louis-ICN Incheon Intl
35h 20m1 stop Toronto Pearson Intl
Asiana Airlines Logo
6:55 pm - 3:26 pmICN  Incheon Intl-STL Lambert-St Louis
35h 31m2 stops Vancouver Intl Toronto Pearson Intl
$1,082Asiana Airlines
Wed, Oct 28 - Tue, Nov 3
Delta Logo
7:18 pm - 5:45 amSTL  Lambert-St Louis-ICN Incheon Intl
19h 27m1 stop Atlanta Hartsfield-Jackson
Delta Logo
8:35 pm - 11:23 pmICN  Incheon Intl-STL Lambert-St Louis
17h 48m1 stop Minneapolis St Paul
$1,107Delta
Tue, Nov 17 - Wed, Dec 16
Delta Logo
4:59 pm - 4:00 amSTL  Lambert-St Louis-ICN Incheon Intl
21h 01m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:35 pm - 9:09 pmICN  Incheon Intl-STL Lambert-St Louis
17h 34m1 stop Salt Lake City
$1,107Delta
Mon, Oct 5 - Wed, Nov 4
United Airlines Logo
7:08 am - 3:00 pmSTL  Lambert-St Louis-ICN Incheon Intl
17h 52m1 stop San Francisco
United Airlines Logo
12:45 pm - 10:24 pmICN  Incheon Intl-STL Lambert-St Louis
24h 39m2 stops San Francisco Chicago O'Hare Intl
$1,112United Airlines
Mon, Oct 5 - Wed, Nov 4
United Airlines Logo
5:00 am - 4:15 pmSTL  Lambert-St Louis-ICN Incheon Intl
21h 15m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
12:45 pm - 4:57 pmICN  Incheon Intl-STL Lambert-St Louis
19h 12m2 stops San Francisco Denver Intl
$1,112United Airlines
Tue, Oct 27 - Tue, Nov 3
Korean Air Logo
7:00 am - 3:30 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 30m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
8:35 pm - 9:25 pmICN  Incheon Intl-STL Lambert-St Louis
15h 50m1 stop Minneapolis St Paul
$1,735Korean Air
Fri, Oct 30 - Tue, Nov 3
Korean Air Logo
7:00 am - 3:30 pmSTL  Lambert-St Louis-ICN Incheon Intl
18h 30m1 stop Atlanta Hartsfield-Jackson
Korean Air Logo
8:35 pm - 9:25 pmICN  Incheon Intl-STL Lambert-St Louis
15h 50m1 stop Minneapolis St Paul
$1,735Korean Air
Fri, Oct 30 - Wed, Nov 4

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Air Canada flights from St. Louis to Incheon Intl Airport

Our best Air Canada deals on St. Louis to Incheon Intl Airport flight tickets
Air Canada
Oct 5
STL12:10 pmLambert-St Louis
38h 15m
1 stop
ICN4:25 pmIncheon Intl
Nov 4
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,018
Air Canada
Oct 26
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN5:25 pmIncheon Intl
Nov 25
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,023
Air Canada
Oct 5
STL2:40 pmLambert-St Louis
35h 45m
2 stops
ICN4:25 pmIncheon Intl
Nov 4
ICN6:55 pmIncheon Intl
35h 31m
2 stops
STL3:26 pmLambert-St Louis
$1,026

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
Oct 26
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN5:25 pmIncheon Intl
Nov 3
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,082
Asiana Airlines
Oct 29
STL4:05 pmLambert-St Louis
35h 20m
1 stop
ICN5:25 pmIncheon Intl
Nov 3
ICN8:10 pmIncheon Intl
34h 16m
1 stop
STL3:26 pmLambert-St Louis
$1,232

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 August 17, 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 Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Wed 11/4

8:10 pm-3:26 pm

1 stop34h 16m

$1,018

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Wed 11/4

6:55 pm-3:26 pm

2 stops35h 31m

$1,018

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Wed 10/28

4:05 pm-4:10 pm

2 stops34h 05m

Incheon Intl

Tue 11/3

6:55 pm-3:26 pm

2 stops35h 31m

$1,082

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Wed 10/28

4:05 pm-5:25 pm

1 stop35h 20m

Incheon Intl

Tue 11/3

6:55 pm-3:26 pm

2 stops35h 31m

$1,082

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 11/17

7:18 pm-5:45 am

1 stop19h 27m

Incheon Intl

Wed 12/16

8:35 pm-11:23 pm

1 stop17h 48m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

4:59 pm-4:00 am

1 stop21h 01m

Incheon Intl

Wed 11/4

6:35 pm-9:09 pm

1 stop17h 34m

$1,107

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Mon 10/5

7:08 am-3:00 pm

1 stop17h 52m

Incheon Intl

Wed 11/4

12:45 pm-10:24 pm

2 stops24h 39m

$1,112

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Tue 10/27

5:00 am-4:15 pm

2 stops21h 15m

Incheon Intl

Tue 11/3

12:45 pm-4:57 pm

2 stops19h 12m

$1,112
Quickest round-trip

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Fri 10/30

7:00 am-3:30 pm

1 stop18h 30m

Incheon Intl

Tue 11/3

8:35 pm-9:25 pm

1 stop15h 50m

$1,735

St. LouisIncheon

STL Lambert-St Louis - ICN Incheon Intl

STLICN

Lambert-St Louis

Fri 10/30

7:00 am-3:30 pm

1 stop18h 30m

Incheon Intl

Wed 11/4

8:35 pm-9:25 pm

1 stop15h 50m

$1,735

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 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

Best Price Found

$524

Fastest flight time

18h 34m

Direct flights

None
The best one-way flight to Incheon Intl Airport from St. Louis in the past 72 hours is $524. The best round-trip flight deal from St. Louis to Incheon Intl Airport found on momondo in the last 72 hours is $1,018.
The fastest flight from St. Louis to Incheon Intl Airport takes 18h 34m
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 34m.

  • 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
DeltaPriceFrom $846Free CancellationRating
7.8
8,504 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
10,106 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,221 reviews
Search Korean Air flights
Air CanadaPriceFrom $1,083Free CancellationRating
7.1
11,487 reviews
Search Air Canada flights

Traveling to a place near Seoul?

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

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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?

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