Cheap flights from Incheon Intl Airport to St. Louis from $481

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Incheon Intl Airport to St. Louis departing on 9/19. 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

Delta Logo
7:30 pm - 11:02 pmICN-STL
18h 32m1 stop
Delta Logo
7:30 am - 4:20 pmSTL-ICN
17h 50m1 stop
$637Delta
Find Deal
Wed, Nov 12 - Mon, Nov 24
United Airlines Logo
11:45 am - 4:27 pmICN-STL
18h 42m1 stop
United Airlines Logo
9:00 am - 5:40 amSTL-ICN
29h 40m2 stops
$696United Airlines
Find Deal
Mon, Oct 27 - Mon, Nov 3
United Airlines Logo
11:30 am - 10:00 pmICN-STL
24h 30m2 stops
United Airlines Logo
5:11 pm - 3:00 pmSTL-ICN
31h 49m2 stops
$699United Airlines
Find Deal
Thu, Oct 9 - Mon, Oct 20
Air Canada Logo
6:00 pm - 7:57 pmICN-STL
39h 57m1 stop
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$721Air Canada
Find Deal
Wed, Sep 24 - Wed, Oct 15
Air Canada Logo
6:00 pm - 7:57 pmICN-STL
39h 57m1 stop
Air Canada Logo
9:15 am - 4:15 pmSTL-ICN
41h 00m2 stops
$727Air Canada
Find Deal
Wed, Sep 24 - Wed, Oct 8
American Airlines Logo
5:25 pm - 8:22 pmICN-STL
16h 57m1 stop
American Airlines Logo
5:18 am - 3:30 pmSTL-ICN
20h 12m1 stop
$749American Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
Air Canada Logo
6:00 pm - 3:18 pmICN-STL
35h 18m2 stops
Air Canada Logo
4:05 pm - 4:15 pmSTL-ICN
34h 10m2 stops
$751Air Canada
Find Deal
Wed, Sep 24 - Wed, Oct 15
 Logo
6:20 pm - 11:59 pmICN-STL
19h 39m1 stop
 Logo
3:57 pm - 5:55 pmSTL-ICN
35h 58m1 stop
Thu, Sep 25 - Sat, Oct 18
 Logo
6:40 pm - 11:09 pmICN-STL
18h 29m1 stop
 Logo
7:00 am - 3:20 pmSTL-ICN
18h 20m1 stop
Mon, Sep 15 - Tue, Oct 14
Asiana Airlines Logo
6:20 pm - 11:59 pmICN-STL
19h 39m1 stop
Asiana Airlines Logo
4:14 pm - 5:20 amSTL-ICN
22h 06m1 stop
$945Asiana Airlines
Find Deal
Tue, Aug 19 - Sun, Nov 16

United Airlines flights from Incheon Intl Airport to St. Louis

Our best United Airlines deals on Incheon Intl Airport to St. Louis flight tickets
United Airlines
Oct 27
ICN11:45 amIncheon Intl
18h 42m
1 stop
STL4:27 pmLambert-St Louis
Nov 3
STL9:00 amLambert-St Louis
29h 40m
2 stops
ICN5:40 amIncheon Intl
United Airlines
Oct 9
ICN11:30 amIncheon Intl
24h 30m
2 stops
STL10:00 pmLambert-St Louis
Oct 20
STL5:11 pmLambert-St Louis
31h 49m
2 stops
ICN3:00 pmIncheon Intl
United Airlines
Sep 26
ICN4:50 pmIncheon Intl
32h 57m
2 stops
STL11:47 amLambert-St Louis
Oct 18
STL9:00 amLambert-St Louis
29h 20m
2 stops
ICN4:20 amIncheon Intl

Qatar Airways flights from Incheon Intl Airport to St. Louis

Our best Qatar Airways deals on Incheon Intl Airport to St. Louis flight tickets
Qatar Airways
Aug 13
ICN1:20 amIncheon Intl
49h 15m
2 stops
STL12:35 pmLambert-St Louis
Aug 31
STL4:19 pmLambert-St Louis
34h 46m
2 stops
ICN5:05 pmIncheon Intl
Qatar Airways
Aug 12
ICN1:20 amIncheon Intl
49h 15m
2 stops
STL12:35 pmLambert-St Louis
Aug 21
STL10:08 amLambert-St Louis
40h 57m
2 stops
ICN5:05 pmIncheon Intl
Qatar Airways
Aug 18
ICN1:20 amIncheon Intl
36h 39m
2 stops
STL11:59 pmLambert-St Louis
Nov 16
STL2:50 pmLambert-St Louis
35h 25m
2 stops
ICN5:15 pmIncheon Intl

momondo Fare Finder

 
Customize your flight search to find flights from Incheon Intl Airport to St. Louis 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 4, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 11/12

7:30 pm-11:02 pm

1 stop18h 32m

Lambert-St Louis

Mon 11/24

7:30 am-4:20 pm

1 stop17h 50m

$637

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 10/27

11:45 am-4:27 pm

1 stop18h 42m

Lambert-St Louis

Mon 11/3

9:00 am-5:40 am

2 stops29h 40m

$696

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 10/9

11:30 am-10:00 pm

2 stops24h 30m

Lambert-St Louis

Mon 10/20

5:11 pm-3:00 pm

2 stops31h 49m

$699

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 9/24

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Wed 10/15

4:05 pm-4:15 pm

2 stops34h 10m

$721

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 9/24

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Wed 10/8

9:15 am-4:15 pm

2 stops41h 00m

$727

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 9/2

5:25 pm-8:22 pm

1 stop16h 57m

Lambert-St Louis

Tue 9/9

5:18 am-3:30 pm

1 stop20h 12m

$749

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 9/24

6:00 pm-3:18 pm

2 stops35h 18m

Lambert-St Louis

Wed 10/15

4:05 pm-4:15 pm

2 stops34h 10m

$751

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 9/25

6:20 pm-11:59 pm

1 stop19h 39m

Lambert-St Louis

Sat 10/18

3:57 pm-5:55 pm

1 stop35h 58m

$771

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

6:40 pm-11:09 pm

1 stop18h 29m

Lambert-St Louis

Tue 10/14

7:00 am-3:20 pm

1 stop18h 20m

$832

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 8/19

6:20 pm-11:59 pm

1 stop19h 39m

Lambert-St Louis

Sun 11/16

4:14 pm-5:20 am

1 stop22h 06m

$945

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 St. Louis from

How to get the cheapest flight ticket from Incheon Intl Airport to St. Louis

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Wednesday when prices can be found for as low as $1,203. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $1,719. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Incheon Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $1,112 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $1,719 per ticket.

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

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

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

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

Best Price Found

$481

Fastest flight time

16h 50m

Direct flights

None

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Incheon Intl Airport in the past 72 hours is $481. The best round-trip flight deal from Incheon Intl Airport to St. Louis found on momondo in the last 72 hours is $637.
The fastest flight from Incheon Intl Airport to St. Louis takes 16h 50m
There are no direct flights from Incheon Intl Airport to St. Louis. Popular non-direct route for this connection is Incheon Intl Airport - Lambert-St Louis Airport.
There is 1 airport near St. Louis: Lambert-St Louis (STL)

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

    Lambert-St Louis is 6682.0 mi away from Incheon Intl. By plane, this route typically takes 16h 57m.

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

    Prices for flights from Incheon Intl Airport to Lambert-St Louis Airport are updated daily.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Incheon Intl Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis 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 Lambert-St Louis 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 Incheon Intl Airport to St. Louis?


Best airlines flying from Incheon Intl Airport to St. Louis

Compare and see reviews for airlines that fly from Incheon Intl Airport to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $687Free CancellationRating
8.0
7,987 reviews
Search Delta flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
Fenton
Collinsville
O'Fallon
Alton
St. Peters
Farmington
Wentzville
Festus
Glencoe
Eureka
Edwardsville
Clayton
Shrewsbury
Grafton

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to St. Louis from Seoul.

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

Flights from Seoul to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Seoul to St. Louis 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 Seoul to St. Louis right now. Can momondo alert me if prices change?

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


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Sat 8/9
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