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St. Louis

$478+ 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 7 — Apr 141
Tue 4/7
Tue 4/14
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 8, 2026.

This Air Canada deal was found by Cheapflights users on 3/3. 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.
Tue 4/145:45 pm
ICN
-
STL
2 stops37h 11m
Air Canada
Tue 4/218:54 am
STL
-
ICN
2 stops41h 11m
Air Canada
Deal found 3/3$850
This Air Canada deal was found by Cheapflights users on 3/6. 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.
Tue 4/215:45 pm
ICN
-
STL
2 stops41h 09m
Air Canada
Sun 4/264:05 pm
STL
-
ICN
2 stops34h 00m
Air Canada
Deal found 3/6$862
This Air Canada deal was found by Cheapflights users on 3/3. 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.
Thu 4/95:45 pm
ICN
-
STL
2 stops28h 40m
Air Canada
Mon 4/206:05 pm
STL
-
ICN
2 stops32h 00m
Air Canada
Deal found 3/3$873
This Air Canada deal was found by Cheapflights users on 3/5. 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.
Wed 6/35:45 pm
ICN
-
STL
2 stops32h 21m
Air Canada
Mon 8/245:10 am
STL
-
ICN
2 stops20h 55m
Air Canada
Deal found 3/5$885
This Air Canada deal was found by Cheapflights users on 3/4. 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.
Sat 4/185:45 pm
ICN
-
STL
2 stops28h 40m
Air Canada
Sat 4/252:40 pm
STL
-
ICN
2 stops35h 25m
Air Canada
Deal found 3/4$924
This Air Canada deal was found by Cheapflights users on 3/5. 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.
Wed 6/35:45 pm
ICN
-
STL
2 stops32h 21m
Air Canada
Wed 8/268:55 am
STL
-
ICN
1 stop18h 35m
Air Canada
Deal found 3/5$950

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 8, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$850
(Air Canada)

One-way from

$478
(FlightHub)

Popular in

July

Cheapest in

November

Average price

$784
Provider with most accurate pricing for Incheon Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Incheon Intl-Lambert-St Louis flights.
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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).
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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 8, 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 4/14

7:20 pm-12:25 am

1 stop19h 05m

Lambert-St Louis

Tue 4/21

6:45 pm-3:20 pm

1 stop30h 35m

$999
Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 4/8

7:40 pm-11:25 pm

1 stop17h 45m

Lambert-St Louis

Mon 4/20

7:00 am-3:20 pm

1 stop18h 20m

$1,003

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/9

7:00 pm-12:21 am

2 stops19h 21m

Lambert-St Louis

Wed 4/22

6:00 am-5:20 pm

2 stops21h 20m

$1,003

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 4/24

5:45 pm-8:54 pm

2 stops41h 09m

Lambert-St Louis

Sun 4/26

4:05 pm-5:30 pm

1 stop35h 25m

$1,017

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

7:00 am-4:50 pm

2 stops19h 50m

$1,168

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

9:00 pm-2:51 pm

1 stop31h 51m

Lambert-St Louis

Sun 4/19

7:00 am-5:15 am

1 stop32h 15m

$1,195

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

7:20 pm-12:25 am

1 stop19h 05m

Lambert-St Louis

Sat 4/25

5:00 pm-3:20 pm

1 stop32h 20m

$1,217
Cheapest one-way

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 6/16

10:25 am-8:25 pm

2 stops24h 00m

$478

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 3/30

8:35 pm-11:19 am

2 stops28h 44m

$710

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 3/18

10:20 pm-10:02 pm

2 stops37h 42m

$728

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 14 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.

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 8, 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
8,269 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Comfort

7.9

Food

7.2

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
8,269 reviews
Delta
7.9
Good
8,269 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Comfort

7.9

Food

7.2

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
11,397 reviews
Delta
7.9
Good
8,269 reviews

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Comfort

7.9

Food

7.2

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 $999, Delta can have you in St. Louis from Incheon Intl Airport in 19h 05m. 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 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$568Average$1,621FlexibilityNo cancel feeOn-time71%
DeltaCheapest$630Average$784FlexibilityNo cancel feeOn-timeN/A

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