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St. Louis

$559+ Cheap flights from Incheon Intl (ICN) to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
Apr 28 — May 51
Tue 4/28
Tue 5/5
1 adult, Economy
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Cheap flight deals from Incheon Intl to St. Louis

Cheapest flights from Incheon Intl to St. Louis
Explore the most affordable flight options available from Incheon Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 29, 2026.

This Air Canada deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:55 pm
ICN
-
STL
2 stops35h 35m
Air Canada
Tue 11/104:15 pm
STL
-
ICN
2 stops33h 55m
Air Canada
Deal found 3/27$802
This Gotogate deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:45 pm
ICN
-
STL
2 stops56h 21m
Air Canada
Wed 5/207:05 am
STL
-
ICN
2 stops43h 00m
Air Canada
Deal found 3/27$858
This Air Canada deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:55 pm
ICN
-
STL
2 stops35h 35m
Air Canada
Tue 11/34:15 pm
STL
-
ICN
2 stops33h 55m
Air Canada
Deal found 3/29$867
This Hanatour deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:40 pm
ICN
-
STL
1 stop19h 56m
Delta
Tue 11/106:30 am
STL
-
ICN
1 stop18h 20m
Delta
Deal found 3/27$948
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/105:45 pm
ICN
-
STL
2 stops40h 40m
Air Canada
Sun 5/177:05 am
STL
-
ICN
2 stops43h 00m
Air Canada
Deal found 3/26$952
This Korean Air deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/67:30 pm
ICN
-
STL
1 stop18h 33m
Korean Air
Tue 11/106:30 am
STL
-
ICN
1 stop18h 20m
Korean Air
Deal found 3/27$1,048

Find flight deals from Incheon Intl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Incheon Intl (ICN) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$858
(Gotogate)

One-way from

$559
(FlightHub)

Popular in

July

Cheapest in

November

Average price

$784
Provider with most accurate pricing for Incheon Intl-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Incheon Intl-Lambert-St Louis flights.
Search Deals
From Incheon Intl to Lambert-St Louis
Search Deals
One-way flight from Incheon Intl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 25% potential increase in price ($329 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Incheon Intl 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, Cheapflights users made 2,558,603 searches. Data last updated March 29, 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

Sat 4/25

7:35 pm-11:59 pm

1 stop18h 24m

Lambert-St Louis

Thu 4/30

7:00 am-5:30 pm

1 stop20h 30m

$1,285
Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

7:40 pm-11:14 pm

1 stop17h 34m

Lambert-St Louis

Sun 4/19

9:26 am-5:20 pm

1 stop17h 54m

$1,299

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sat 4/11

7:40 pm-11:25 pm

1 stop17h 45m

Lambert-St Louis

Tue 4/21

6:20 am-5:20 pm

1 stop21h 00m

$1,349

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 4/15

7:20 pm-12:25 am

1 stop19h 05m

Lambert-St Louis

Wed 4/22

6:20 am-4:40 pm

2 stops20h 20m

$1,388

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

7:20 pm-12:25 am

1 stop19h 05m

Lambert-St Louis

Sun 4/19

6:20 am-4:50 pm

2 stops20h 30m

$1,504

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

7:00 pm-12:25 am

2 stops19h 25m

Lambert-St Louis

Tue 4/21

6:00 am-5:20 pm

2 stops21h 20m

$1,504
Cheapest one-way

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 6/16

8:10 am-8:25 pm

2 stops26h 15m

$606

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 5/13

5:50 pm-10:59 pm

1 stop19h 09m

$678

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 4/15

6:35 pm-11:47 am

2 stops31h 12m

$814

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 8/3

12:55 pm-6:08 pm

3 stops43h 13m

$841

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Compare providers for flights from Incheon Intl to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Incheon Intl to St. Louis in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Incheon Intl Airport-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Incheon Intl Airport-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Incheon Intl Airport-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Incheon Intl Airport-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Incheon Intl Airport-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Incheon Intl to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Incheon Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Incheon Intl Airport to St. Louis

How much does it cost to fly round-trip from Incheon Intl Airport to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated March 29, 2026.
Get a feel of what it's like to fly with Delta and American Airlines from Incheon Intl Airport to St. Louis by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,359 reviews

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,359 reviews
Delta
7.9
Good
8,359 reviews

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.1
Good
11,521 reviews
Delta
7.9
Good
8,359 reviews

Overall

7.9

Boarding

8.1

Food

7.2

Comfort

7.9

Crew

8.5

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

Find useful and relevant information for your journey from Incheon Intl to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from Incheon Intl?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Incheon Intl. On average, Lambert-St Louis has 0 inbound flights from Incheon Intl per day from 2 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • How long is the flight from Incheon Intl Airport to St. Louis?

    For as low as $1,299, Korean Air can have you in St. Louis from Incheon Intl Airport in 17h 34m. Incheon Intl Airport and St. Louis are separated by a distance of 6670 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Incheon Intl Airport to St. Louis round-trip?

    Flying on American Airlines is currently your cheapest option to St. Louis, with prices starting at $568. Another option worth looking into is Delta, starting at $630 round trip. These flights start at 40% lower than the current average price 3 months from now.

  • Can I find deals for flights from Incheon Intl to St. Louis that include hotel bookings?

    Yes. In addition to deals on Incheon Intl to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Incheon Intl to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Incheon Intl to St. Louis.

  • Can I find deals for business class flights from Incheon Intl to St. Louis?

    Yes. Cheapflights offers flight deals from Incheon Intl to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

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Alternative routes for Incheon Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
Incheon Intl to Springfield flights

Top 2 airlines flying from Incheon Intl to St. Louis

Discover the top 2 airlines that operate flights from Incheon Intl to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$568Average$1,621FlexibilityNo cancel feeOn-time71%
DeltaCheapest$630Average$835FlexibilityNo cancel feeOn-timeN/A

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