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Cheap flights from St. Louis to Seoul from $451

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 8/16. 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.
WestJet Logo
5:30 pm - 6:45 pm
STL
-
ICN
59h 15m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
41h 33m
2 stops
$1,079WestJet
Mon, Oct 19 - Mon, Nov 2
WestJet Logo
3:42 pm - 6:45 pm
STL
-
ICN
37h 03m
2 stops
WestJet Logo
8:45 pm - 11:18 pm
ICN
-
STL
40h 33m
2 stops
$1,095WestJet
Fri, Oct 16 - Sun, Oct 25
WestJet Logo
6:00 am - 6:45 pm
STL
-
ICN
46h 45m
2 stops
WestJet Logo
8:45 pm - 6:15 pm
ICN
-
STL
35h 30m
2 stops
$1,104WestJet
Thu, Oct 22 - Tue, Oct 27
WestJet Logo
11:13 am - 6:45 pm
STL
-
ICN
41h 32m
2 stops
WestJet Logo
8:45 pm - 9:34 am
ICN
-
STL
26h 49m
2 stops
$1,106WestJet
Sat, Sep 5 - Fri, Sep 11
WestJet Logo
5:28 pm - 6:45 pm
STL
-
ICN
35h 17m
2 stops
WestJet Logo
8:45 pm - 11:48 pm
ICN
-
STL
41h 03m
2 stops
$1,127WestJet
Fri, Oct 16 - Sun, Oct 25
WestJet Logo
5:47 pm - 6:45 pm
STL
-
ICN
58h 58m
2 stops
WestJet Logo
8:45 pm - 11:16 pm
ICN
-
STL
40h 31m
2 stops
$1,134WestJet
Tue, Sep 8 - Tue, Sep 15
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
$1,136WestJet
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 - 9:34 am
ICN
-
STL
26h 49m
2 stops
$1,150WestJet
Wed, Sep 16 - Fri, Sep 25
WestJet Logo
6:00 am - 6:45 pm
STL
-
ICN
46h 45m
2 stops
WestJet Logo
8:45 pm - 8:37 pm
ICN
-
STL
37h 52m
2 stops
$1,194WestJet
Sun, Jul 19 - Thu, Oct 15
Air Canada Logo
12:10 pm - 4:25 pm
STL
-
ICN
38h 15m
1 stop
Air Canada Logo
8:10 pm - 3:26 pm
ICN
-
STL
34h 16m
1 stop
$1,200Air Canada
Mon, Oct 5 - Mon, Nov 2

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WestJet flights from St. Louis to Incheon Intl Airport

Our best WestJet deals on St. Louis to Incheon Intl Airport flight tickets
WestJet
Sep 5
STL11:13 amLambert-St Louis
41h 32m
2 stops
ICN6:45 pmIncheon Intl
Sep 11
ICN8:45 pmIncheon Intl
26h 49m
2 stops
STL9:34 amLambert-St Louis
$1,106
WestJet
Sep 8
STL5:47 pmLambert-St Louis
58h 58m
2 stops
ICN6:45 pmIncheon Intl
Sep 15
ICN8:45 pmIncheon Intl
40h 31m
2 stops
STL11:16 pmLambert-St Louis
$1,134
WestJet
Sep 16
STL1:55 pmLambert-St Louis
38h 50m
2 stops
ICN6:45 pmIncheon Intl
Sep 25
ICN8:45 pmIncheon Intl
26h 49m
2 stops
STL9:34 amLambert-St Louis
$1,136

Delta flights from St. Louis to Incheon Intl Airport

Our best Delta deals on St. Louis to Incheon Intl Airport flight tickets
Delta
Aug 3
STL9:15 amLambert-St Louis
28h 45m
1 stop
ICN4:00 amIncheon Intl
Aug 21
ICN7:20 pmIncheon Intl
19h 21m
1 stop
STL12:41 amLambert-St Louis
$1,460
Delta
Jul 19
STL6:09 pmLambert-St Louis
32h 16m
1 stop
ICN4:25 pmIncheon Intl
Oct 15
ICN4:25 pmIncheon Intl
21h 14m
1 stop
STL11:39 pmLambert-St Louis
$1,465
Delta
Jul 26
STL6:09 pmLambert-St Louis
32h 16m
1 stop
ICN4:25 pmIncheon Intl
Aug 18
ICN10:15 amIncheon Intl
22h 12m
2 stops
STL6:27 pmLambert-St Louis
$1,470

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 June 29, 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 10/19

5:30 pm-6:45 pm

2 stops59h 15m

Incheon Intl

Mon 11/2

8:45 pm-11:18 pm

2 stops41h 33m

$1,079

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/16

3:42 pm-6:45 pm

2 stops37h 03m

Incheon Intl

Sun 10/25

8:45 pm-11:18 pm

2 stops40h 33m

$1,095

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 10/22

6:00 am-6:45 pm

2 stops46h 45m

Incheon Intl

Tue 10/27

8:45 pm-6:15 pm

2 stops35h 30m

$1,104

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/5

11:13 am-6:45 pm

2 stops41h 32m

Incheon Intl

Fri 9/11

8:45 pm-9:34 am

2 stops26h 49m

$1,106

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/16

5:28 pm-6:45 pm

2 stops35h 17m

Incheon Intl

Sun 10/25

8:45 pm-11:48 pm

2 stops41h 03m

$1,127

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/8

5:47 pm-6:45 pm

2 stops58h 58m

Incheon Intl

Tue 9/15

8:45 pm-11:16 pm

2 stops40h 31m

$1,134
Quickest 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

$1,136

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

$1,150

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 7/19

6:00 am-6:45 pm

2 stops46h 45m

Incheon Intl

Thu 10/15

8:45 pm-8:37 pm

2 stops37h 52m

$1,194

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

12:10 pm-4:25 pm

1 stop38h 15m

Incheon Intl

Mon 11/2

8:10 pm-3:26 pm

1 stop34h 16m

$1,200

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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 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

16h 02m

Direct flights

None
The fastest flight from St. Louis to Incheon Intl Airport takes 16h 02m
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 16h 02m.

  • 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
8,450 reviews
Search Delta flights
United AirlinesPriceFrom $865Free CancellationRating
7.4
9,895 reviews
Search United Airlines flights
Korean AirPriceFrom $999Free CancellationRating
8.4
1,220 reviews
Search Korean Air 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?

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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?

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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