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

$587+ Cheap flights from Incheon Intl (ICN) to St. Louis (STL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
Aug 20 — Aug 271
Wed 8/20
Wed 8/27
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 August 15, 2025.

Round-trip from

$587
(Mytrip)

Popular in

January

Cheapest in

March

Average price

$1,272
From Incheon Intl to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($204 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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 August 15, 2025.

This Mytrip deal was found by Cheapflights users on 8/14. 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.
Fri 9/196:00 pmICN - STL
1 stop39h 57mAir Canada
Mon 10/204:05 pmSTL - ICN
2 stops34h 10mAir Canada
Deal found 8/14$587
This Hanatour deal was found by Cheapflights users on 8/12. 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 Hanatour is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:40 pmICN - STL
1 stop18h 44mDelta
Wed 10/296:40 amSTL - ICN
1 stop20h 10mDelta
Deal found 8/12$632
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Tue 10/2811:45 amICN - STL
1 stop18h 42mUnited Airlines
Tue 11/114:55 pmSTL - ICN
2 stops21h 45mUnited Airlines
Deal found 8/13$664
This United Airlines deal was found by Cheapflights users on 8/14. 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 9/194:50 pmICN - STL
2 stops31h 12mUnited Airlines
Sun 10/265:29 pmSTL - ICN
1 stop31h 46mUnited Airlines
Deal found 8/14$667
This Korean Air deal was found by Cheapflights users on 8/12. 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.
Mon 9/156:40 pmICN - STL
1 stop18h 29mMultiple Airlines
Tue 10/148:53 amSTL - ICN
1 stop18h 27mMultiple Airlines
Deal found 8/12$708
This Korean Air deal was found by Cheapflights users on 8/13. 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.
Wed 12/177:30 pmICN - STL
1 stop18h 32mKorean Air
Tue 12/306:04 amSTL - ICN
1 stop18h 26mKorean Air
Deal found 8/13$709
This Korean Air deal was found by Cheapflights users on 8/14. 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 9/196:40 pmICN - STL
1 stop18h 29mKorean Air
Mon 10/208:53 amSTL - ICN
1 stop18h 27mKorean Air
Deal found 8/14$713
This Korean Air deal was found by Cheapflights users on 8/13. 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.
Mon 10/136:40 pmICN - STL
1 stop18h 27mKorean Air
Mon 11/36:40 amSTL - ICN
1 stop19h 10mKorean Air
Deal found 8/13$723
This United Airlines deal was found by Cheapflights users on 8/12. 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.
Thu 11/2012:45 pmICN - STL
1 stop18h 42mUnited Airlines
Sun 11/304:17 pmSTL - ICN
2 stops32h 58mUnited Airlines
Deal found 8/12$736
This Gotogate deal was found by Cheapflights users on 8/13. 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.
Sun 9/216:00 pmICN - STL
1 stop39h 57mAir Canada
Tue 10/144:05 pmSTL - ICN
2 stops58h 10mAir Canada
Deal found 8/13$760

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 August 15, 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

Fri 9/19

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Mon 10/20

4:05 pm-4:15 pm

2 stops34h 10m

$587

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 9/19

6:00 pm-7:57 pm

1 stop39h 57m

Lambert-St Louis

Sun 10/19

4:05 pm-4:15 pm

2 stops58h 10m

$587

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Wed 10/15

7:40 pm-12:24 am

1 stop18h 44m

Lambert-St Louis

Wed 10/29

6:40 am-4:50 pm

1 stop20h 10m

$632

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 10/28

11:45 am-6:47 pm

2 stops21h 02m

Lambert-St Louis

Tue 11/11

11:20 am-5:40 am

2 stops27h 20m

$664

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 10/14

11:30 am-10:00 pm

2 stops24h 30m

Lambert-St Louis

Thu 10/30

1:35 pm-4:40 am

2 stops25h 05m

$667

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 9/19

4:50 pm-10:02 am

2 stops31h 12m

Lambert-St Louis

Sun 10/26

4:17 pm-3:15 pm

2 stops32h 58m

$667

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 8/19

1:20 pm-9:11 am

3 stops57h 51m

$724

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 8/19

4:25 pm-10:02 pm

1 stop19h 37m

$1,162

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

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 August 15, 2025.
Get a feel of what it's like to fly with Delta 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
8.0
Very good
7,982 reviews

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Overall

8.0

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Food

7.3

Reviews

1 / 20
6.0
Good

Morgan Rae,Aug 2025

BRU - JFK

Typically I choose delta because they do a great job but this time the flight attendant in my zone was very rude and didnt offer the same treatment as she did to others

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 1 airline. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What is the cheapest airline to fly from Incheon Intl Airport to St. Louis round-trip?

    Flying on Delta is currently your cheapest option to St. Louis, with prices starting at $687. This flight start at 41% 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.

  • 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 St. Louis?

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

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
Gimpo Intl to Kansas City flights
Gimpo Intl to St. Louis flights
Incheon Intl to Springfield flights

Top airline flying from Incheon Intl to St. Louis

Discover the top airline 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 August 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$687Average$942FlexibilityNo cancel feeOn-timeN/A

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.