HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$574+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Incheon Intl to St. Louis with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$858
(Kiwi.com)

One-way from

$574
(Kiwi.com)

Popular in

August

Cheapest in

March

Average price

$921
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. 22% potential increase in price ($378 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($92 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 29, 2025.

This Trip.com deal was found by Cheapflights users on 4/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/32:40 pmICN - STL
2 stops44h 25mMultiple Airlines
Sat 5/108:15 pmSTL - ICN
2 stops42h 05mMultiple Airlines
Deal found 4/28$784
This Gotogate deal was found by Cheapflights users on 4/28. 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.
Fri 11/148:10 pmICN - STL
1 stop34h 16mAir Canada
Sat 11/224:15 pmSTL - ICN
2 stops57h 50mAir Canada
Deal found 4/28$946
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 8/294:50 pmICN - STL
2 stops31h 12mUnited Airlines
Tue 9/308:25 amSTL - ICN
2 stops29h 55mUnited Airlines
Deal found 4/28$1,096
This Korean Air deal was found by Cheapflights users on 4/27. 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 5/166:40 pmICN - STL
1 stop18h 46mKorean Air
Sun 6/1511:17 amSTL - ICN
1 stop16h 03mKorean Air
Deal found 4/27$1,303
This Qatar Airways deal was found by Cheapflights users on 4/28. 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.
Wed 8/271:20 amICN - STL
2 stops36h 31mQatar Airways
Tue 9/3011:38 amSTL - ICN
2 stops39h 27mQatar Airways
Deal found 4/28$1,788

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 April 29, 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

Mon 5/26

4:40 pm-12:04 am

1 stop21h 24m

Lambert-St Louis

Tue 6/17

6:41 am-4:40 pm

1 stop19h 59m

$858

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 5/13

7:05 pm-12:36 pm

1 stop31h 31m

Lambert-St Louis

Mon 7/28

1:30 pm-4:15 pm

1 stop36h 45m

$1,073

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 8/29

4:50 pm-10:02 am

2 stops31h 12m

Lambert-St Louis

Tue 9/30

8:25 am-4:20 am

2 stops29h 55m

$1,096

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 5/16

6:40 pm-11:26 pm

1 stop18h 46m

Lambert-St Louis

Sun 6/15

11:17 am-5:20 pm

1 stop16h 03m

$1,303

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 8/27

1:20 am-11:51 pm

2 stops36h 31m

Lambert-St Louis

Tue 9/30

11:38 am-5:05 pm

2 stops39h 27m

$1,788

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 5/4

12:45 pm-12:06 am

2 stops49h 21m

$574

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 7/17

8:45 pm-8:36 pm

2 stops37h 51m

$871

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 7/16

9:25 pm-11:59 pm

2 stops40h 34m

$883

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 5/4

4:50 pm-10:45 pm

1 stop19h 55m

$967

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 7/16

7:40 pm-12:38 am

1 stop18h 58m

$976

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 14 results
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 April.
ProviderPrice AccuracyTrust Score*
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust 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 eDreams the most. eDreams 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

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 April 29, 2025.
Read through reviews of airlines operating flights from Seoul to St. Louis, such as Korean Air, Singapore Airlines and Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Korean Air
8.4
Very good
1,066 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Singapore Airlines
8.1
Very good
1,292 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Alaska Airlines
8.0
Very good
9,961 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Delta
8.0
Very good
7,936 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Qatar Airways
7.4
Good
3,563 reviews
Korean Air
8.4
Very good
1,066 reviews

Entertainment

8.2

Comfort

8.3

Food

8.1

Boarding

8.5

Overall

8.4

Crew

8.7

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

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.

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

    Flying on Air Canada is currently your cheapest option to St. Louis, with prices starting at $1,073. Additional round-trip tickets that might be worth considering are offered by United Airlines and Korean Air, with the lowest prices starting at $1,096 and $1,303, respectively. These flights start at 18% 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 WestJet, with whom users have recently found tickets for as low as $871. However, be on the lookout for offers from Alaska Airlines and United Airlines, 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.

  • What is the cheapest month to book a flight from Incheon Intl Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to St. Louis (average of $311). Flying from Incheon Intl Airport to St. Louis in March is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
Fenton
Maryland Heights
Fairview Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Glencoe
Alton
Farmington
O'Fallon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Incheon Intl to Springfield flights
Gimpo Intl to St. Louis flights
Gimpo Intl to Kansas City 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$941Average$1,464FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$1,312Average$1,482FlexibilityNo cancel feeOn-time81%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.