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Cheap flights from Incheon Intl Airport to St. Louis from $710

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 6/5. 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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0 bags

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Find the cheapest flights from Incheon Intl Airport to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
WestJet Logo
8:45 pm - 6:07 pm
ICN
-
STL
35h 22m
2 stops
WestJet Logo
3:58 pm - 6:45 pm
STL
-
ICN
36h 47m
2 stops
$1,376WestJet
Tue, Jun 23 - Tue, Jul 14
American Airlines Logo
6:35 pm - 8:03 am
ICN
-
STL
27h 28m
2 stops
American Airlines Logo
3:33 pm - 4:25 pm
STL
-
ICN
34h 52m
1 stop
$1,407American Airlines
Wed, Oct 28 - Sat, Oct 31
Qatar Airways Logo
1:20 am - 12:16 am
ICN
-
STL
36h 56m
2 stops
Qatar Airways Logo
6:00 am - 5:05 pm
STL
-
ICN
45h 05m
2 stops
$1,409Qatar Airways
Wed, Jun 24 - Tue, Aug 25
American Airlines Logo
6:35 pm - 4:15 pm
ICN
-
STL
35h 40m
2 stops
American Airlines Logo
5:11 pm - 4:25 pm
STL
-
ICN
33h 14m
1 stop
$1,422American Airlines
Wed, Oct 28 - Sat, Oct 31
Multiple Airlines Logo
7:35 pm - 6:45 pm
ICN
-
STL
37h 10m
1 stop
Multiple Airlines Logo
2:52 pm - 8:10 pm
STL
-
ICN
39h 18m
2 stops
$1,429Multiple Airlines
Fri, May 29 - Fri, Jul 31
American Airlines Logo
6:35 pm - 7:28 pm
ICN
-
STL
38h 53m
2 stops
American Airlines Logo
5:11 pm - 4:25 pm
STL
-
ICN
33h 14m
1 stop
$1,432American Airlines
Wed, Oct 28 - Sat, Oct 31
Qatar Airways Logo
1:20 am - 12:16 am
ICN
-
STL
36h 56m
2 stops
Qatar Airways Logo
1:25 pm - 5:05 pm
STL
-
ICN
37h 40m
2 stops
$1,475Qatar Airways
Mon, Jun 22 - Tue, Jul 14
WestJet Logo
8:45 pm - 12:34 pm
ICN
-
STL
53h 49m
2 stops
WestJet Logo
1:59 pm - 6:45 pm
STL
-
ICN
38h 46m
2 stops
$1,518WestJet
Sun, Jun 7 - Wed, Jun 17
Qatar Airways Logo
1:20 am - 12:16 am
ICN
-
STL
36h 56m
2 stops
Qatar Airways Logo
1:25 pm - 5:05 pm
STL
-
ICN
37h 40m
2 stops
$1,524Qatar Airways
Mon, Jun 29 - Tue, Jul 14
Qatar Airways Logo
1:20 am - 11:59 pm
ICN
-
STL
36h 39m
2 stops
Qatar Airways Logo
9:08 am - 5:05 pm
STL
-
ICN
41h 57m
2 stops
$1,538Qatar Airways
Mon, Jun 29 - Tue, Jul 14

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
Jun 24
ICN1:20 amIncheon Intl
36h 56m
2 stops
STL12:16 amLambert-St Louis
Aug 25
STL6:00 amLambert-St Louis
45h 05m
2 stops
ICN5:05 pmIncheon Intl
$1,409
Qatar Airways
Jun 22
ICN1:20 amIncheon Intl
36h 56m
2 stops
STL12:16 amLambert-St Louis
Jul 14
STL1:25 pmLambert-St Louis
37h 40m
2 stops
ICN5:05 pmIncheon Intl
$1,475
Qatar Airways
Jun 29
ICN1:20 amIncheon Intl
36h 56m
2 stops
STL12:16 amLambert-St Louis
Jul 14
STL1:25 pmLambert-St Louis
37h 40m
2 stops
ICN5:05 pmIncheon Intl
$1,524

Air Canada flights from Incheon Intl Airport to St. Louis

Our best Air Canada deals on Incheon Intl Airport to St. Louis flight tickets
Air Canada
Jun 4
ICN5:45 pmIncheon Intl
32h 21m
2 stops
STL12:06 pmLambert-St Louis
Jun 9
STL2:15 pmLambert-St Louis
35h 50m
2 stops
ICN4:05 pmIncheon Intl
$1,551
Air Canada
May 18
ICN5:45 pmIncheon Intl
32h 21m
2 stops
STL12:06 pmLambert-St Louis
May 30
STL2:15 pmLambert-St Louis
35h 50m
2 stops
ICN4:05 pmIncheon Intl
$1,581
Air Canada
Jun 4
ICN7:05 pmIncheon Intl
39h 20m
2 stops
STL8:25 pmLambert-St Louis
Jun 9
STL2:15 pmLambert-St Louis
35h 50m
2 stops
ICN4:05 pmIncheon Intl
$1,620

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 May 13, 2026.
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

Cheapest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 6/23

8:45 pm-6:07 pm

2 stops35h 22m

Lambert-St Louis

Tue 7/14

3:58 pm-6:45 pm

2 stops36h 47m

$1,376
Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-8:03 am

2 stops27h 28m

Lambert-St Louis

Sat 10/31

3:33 pm-4:25 pm

1 stop34h 52m

$1,407

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 6/24

1:20 am-12:16 am

2 stops36h 56m

Lambert-St Louis

Tue 8/25

6:00 am-5:05 pm

2 stops45h 05m

$1,409

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-4:15 pm

2 stops35h 40m

Lambert-St Louis

Sat 10/31

5:11 pm-4:25 pm

1 stop33h 14m

$1,422

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 5/29

7:35 pm-6:45 pm

1 stop37h 10m

Lambert-St Louis

Fri 7/31

2:52 pm-8:10 pm

2 stops39h 18m

$1,429

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/28

6:35 pm-7:28 pm

2 stops38h 53m

Lambert-St Louis

Sat 10/31

5:11 pm-4:25 pm

1 stop33h 14m

$1,432

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/22

1:20 am-12:16 am

2 stops36h 56m

Lambert-St Louis

Tue 7/14

1:25 pm-5:05 pm

2 stops37h 40m

$1,475

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 6/7

8:45 pm-12:34 pm

2 stops53h 49m

Lambert-St Louis

Wed 6/17

1:59 pm-6:45 pm

2 stops38h 46m

$1,518

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/29

1:20 am-12:16 am

2 stops36h 56m

Lambert-St Louis

Tue 7/14

1:25 pm-5:05 pm

2 stops37h 40m

$1,524

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/29

1:20 am-11:59 pm

2 stops36h 39m

Lambert-St Louis

Tue 7/14

9:08 am-5:05 pm

2 stops41h 57m

$1,538

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 typical price of a round-trip flight between Incheon Intl Airport and St. Louis?

What is the cheapest month to fly to St. Louis?

In general, April is the cheapest month to fly from Incheon Intl Airport to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. The month of November is another great option to travel to St. Louis, with average flight prices from Incheon Intl Airport averaging around $568.

Can stopping save me money on Incheon Intl Airport to St. Louis flights?

You could potentially save up to 12% on your flight if you consider stops on a Incheon Intl Airport to St. Louis flight.

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

Fastest flight time

18h 19m

Direct flights

None
The fastest flight from Incheon Intl Airport to St. Louis takes 18h 19m
There are no direct flights from Incheon Intl Airport to St. Louis. There are no popular flight routes from Incheon Intl Airport to St. Louis.
Search flight deals

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

  • 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 18h 19m.

  • 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 $630Free CancellationRating
7.9
8,450 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
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
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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