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St. Louis

$529+ 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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
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Cheap 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 November 13, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$616
(Delta)

One-way from

$529
(Expedia)

Popular in

January

Cheapest in

November

Average price

$568
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
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One-way flight from Incheon Intl to Lambert-St Louis
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Highest demand for flights based on searches. 27% potential increase in price ($414 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find 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 November 13, 2025.

This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/137:15 pmICN - STL
2 stops27h 54mAmerican Airlines
Mon 11/171:50 pmSTL - ICN
2 stops35h 55mAmerican Airlines
Deal found 11/11$541
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:00 pmICN - STL
2 stops31h 00mUnited Airlines
Wed 1/72:45 pmSTL - ICN
2 stops34h 30mUnited Airlines
Deal found 11/12$694
This Delta deal was found by Cheapflights users on 11/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:30 pmICN - STL
1 stop17h 46mDelta
Sat 1/37:02 pmSTL - ICN
1 stop29h 48mDelta
Deal found 11/12$800
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2412:45 pmICN - STL
1 stop18h 42mUnited Airlines
Sat 12/65:30 pmSTL - ICN
1 stop31h 45mUnited Airlines
Deal found 11/12$814
This Korean Air deal was found by Cheapflights users on 11/12. 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.
Sun 12/710:40 amICN - STL
1 stop17h 49mMultiple Airlines
Wed 1/76:10 amSTL - ICN
1 stop18h 20mMultiple Airlines
Deal found 11/12$869
This American Airlines deal was found by Cheapflights users on 11/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:15 pmICN - STL
2 stops19h 23mAmerican Airlines
Wed 1/77:15 amSTL - ICN
1 stop18h 30mAmerican Airlines
Deal found 11/12$898
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 pmICN - STL
2 stops34h 20mUnited Airlines
Sat 1/36:35 pmSTL - ICN
2 stops30h 40mUnited Airlines
Deal found 11/12$1,164
This Qatar Airways deal was found by Cheapflights users on 11/12. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:20 amICN - STL
2 stops38h 18mQatar Airways
Wed 1/711:05 amSTL - ICN
2 stops39h 10mQatar Airways
Deal found 11/12$1,581
This Mytrip deal was found by Cheapflights users on 11/11. 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.
Thu 11/136:55 pmICN - STL
2 stops35h 34mMultiple Airlines
Mon 11/1710:00 amSTL - ICN
3 stops35h 20mMultiple Airlines
Deal found 11/11$1,645

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 November 13, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to St. Louis that are best for you.

Fly from

Incheon Intl

Fly to

St. Louis

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 4/14

7:20 pm-12:36 am

2 stops19h 16m

Lambert-St Louis

Tue 4/21

5:30 pm-5:20 pm

1 stop33h 50m

$616

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

7:40 pm-12:36 am

1 stop18h 56m

Lambert-St Louis

Sun 4/19

7:30 am-3:20 pm

1 stop17h 50m

$619

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 2/11

8:10 am-3:29 pm

2 stops46h 19m

$529

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 2/11

7:15 pm-10:59 pm

1 stop18h 44m

$664

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 2/11

12:45 pm-8:23 pm

3 stops46h 38m

$1,159

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 2/10

12:20 am-9:15 pm

2 stops35h 55m

$1,479

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/11

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 November.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
GurufarePrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Incheon Intl Airport-St. Louis flight deals on Cheapflights vs. eDreams >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 Gurufare the most. Gurufare 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 November 13, 2025.
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
8,009 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

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
8,009 reviews
Delta
7.9
Good
8,009 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

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
7.2
Good
11,049 reviews
Delta
7.9
Good
8,009 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Crew

8.5

Comfort

7.9

Food

7.3

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 $616, Delta can have you in St. Louis from Incheon Intl Airport in 19h 16m. Incheon Intl Airport and St. Louis are separated by a distance of 6670 mi.

  • 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 46% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Incheon Intl Airport to St. Louis one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $664. However, be on the lookout for offers from United Airlines and Qatar Airways, as they are both options that can get you from Incheon Intl Airport to St. Louis for a low price.

  • 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
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
St. Peters
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 Kansas City flights
Gimpo Intl to Kansas City flights
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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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$568Average$1,552FlexibilityNo cancel feeOn-time71%
DeltaCheapest$630Average$926FlexibilityNo cancel feeOn-timeN/A

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