$523+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
Sep 12 — Sep 191
Round-trip
1 adult, Economy
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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
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Best
Last-minute
One-way
Cheapest flights from Incheon Intl to St. LouisExplore 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 13, 2026.
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 13, 2026.
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:00 pm -
2 stops36h 17m
Sat 9/128:10 pm -
2 stops29h 40m
Deal found 8/13![Multiple Airlines logo]()
$890
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/175:50 pm -
1 stop32h 25m
Sun 9/2010:45 am -
2 stops39h 00m
Deal found 8/10![American Airlines logo]()
$981
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:50 pm -
1 stop19h 53m
Sat 9/125:43 am -
1 stop20h 02m
Deal found 8/13![American Airlines logo]()
$988
This American Airlines deal was found by Cheapflights users on 8/8. 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.
Fri 9/115:50 pm -
1 stop29h 34m
Mon 9/1410:45 am -
2 stops39h 00m
Deal found 8/8![American Airlines logo]()
$989
Best flights from Incheon Intl to St. LouisDiscover carefully curated flight deals from Incheon Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 13, 2026.
Discover carefully curated flight deals from Incheon Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 13, 2026.
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/175:50 pm -
1 stop32h 25m
Sun 9/2010:45 am -
2 stops39h 00m
Deal found 8/10![American Airlines logo]()
$981
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 9/1711:30 am -
2 stops19h 04m
Sun 9/203:32 pm -
2 stops22h 48m
Deal found 8/12![United Airlines logo]()
$1,172
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.
Wed 9/99:30 pm -
3 stops40h 29m
Sat 9/122:40 pm -
2 stops59h 25m
Deal found 8/13![Multiple Airlines logo]()
$1,449
This American Airlines deal was found by Cheapflights users on 8/8. 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.
Fri 9/115:50 pm -
1 stop19h 53m
Mon 9/147:00 am -
1 stop18h 45m
Deal found 8/8![American Airlines logo]()
$1,094
This United Airlines deal was found by Cheapflights users on 8/8. 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 9/1111:30 am -
2 stops23h 08m
Mon 9/145:30 pm -
2 stops20h 50m
Deal found 8/8![United Airlines logo]()
$1,180
Last-minute flights from Incheon Intl to St. LouisDiscover last-minute flight deals from Incheon Intl to St. Louis. Data last updated August 13, 2026 and is based on user searches.
Discover last-minute flight deals from Incheon Intl to St. Louis. Data last updated August 13, 2026 and is based on user searches.
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/91:00 pm -
2 stops36h 17m
Sat 9/128:10 pm -
2 stops29h 40m
Deal found 8/13![Multiple Airlines logo]()
$890
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:50 pm -
1 stop19h 53m
Sat 9/125:43 am -
1 stop20h 02m
Deal found 8/13![American Airlines logo]()
$988
This American Airlines deal was found by Cheapflights users on 8/8. 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.
Fri 9/115:50 pm -
1 stop29h 34m
Mon 9/1410:45 am -
2 stops39h 00m
Deal found 8/8![American Airlines logo]()
$989
This American Airlines deal was found by Cheapflights users on 8/10. 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 9/175:50 pm -
1 stop32h 25m
Sun 9/2010:45 am -
2 stops39h 00m
Deal found 8/10![American Airlines logo]()
$981
One-way flights from Incheon Intl to St. LouisSearch for one-way flight options from Incheon Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 13, 2026.
Search for one-way flight options from Incheon Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 13, 2026.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:15 pm -
2 stops44h 02m
Deal found 8/12![Multiple Airlines logo]()
$523
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:15 pm -
2 stops28h 20m
Deal found 8/13![Multiple Airlines logo]()
$532
This Kiwi.com deal was found by Cheapflights users on 8/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:15 pm -
3 stops52h 20m
Deal found 8/11![Multiple Airlines logo]()
$546
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:40 pm -
3 stops52h 37m
Deal found 8/12![Multiple Airlines logo]()
$579
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:05 pm -
1 stop38h 55m
Deal found 8/12![Air Canada logo]()
$748
This Orbitz deal was found by Cheapflights users on 8/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:05 pm -
1 stop32h 55m
Deal found 8/11![Air Canada logo]()
$757
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:50 pm -
1 stop19h 53m
Deal found 8/13![American Airlines logo]()
$811
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:50 pm -
1 stop19h 53m
Deal found 8/12![American Airlines logo]()
$815
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 August 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $929 (American Airlines) |
One-way from | $523 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
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 13, 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
Cheapest round-trip
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Thu 9/17
5:50 pm-12:15 pm
1 stop32h 25m
Lambert-St Louis
Sun 9/20
10:45 am-3:45 pm
2 stops39h 00m
$981
Quickest round-trip
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Fri 9/11
5:50 pm-11:43 pm
1 stop19h 53m
Lambert-St Louis
Mon 9/14
7:00 am-3:45 pm
1 stop18h 45m
$1,094
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Thu 9/17
11:30 am-4:34 pm
2 stops19h 04m
Lambert-St Louis
Sun 9/20
3:32 pm-4:20 am
2 stops22h 48m
$1,172
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Fri 9/11
11:30 am-8:38 pm
2 stops23h 08m
Lambert-St Louis
Mon 9/14
5:30 pm-4:20 am
2 stops20h 50m
$1,180
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Wed 9/9
9:30 pm-11:59 pm
3 stops40h 29m
Lambert-St Louis
Sat 9/12
2:40 pm-4:05 pm
2 stops59h 25m
$1,449
Cheapest one-way
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Wed 10/21
7:15 pm-1:17 am
2 stops44h 02m
$523
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Wed 9/9
7:15 pm-9:35 am
2 stops28h 20m
$532
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Fri 9/25
7:15 pm-9:35 am
3 stops52h 20m
$546
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Tue 9/15
8:40 pm-11:17 am
2 stops52h 37m
$581
IncheonSt. Louis
ICN Incheon Intl - STL Lambert-St Louis
ICNSTL
Incheon Intl
Fri 9/25
7:05 pm-2:00 pm
1 stop32h 55m
$757
Showing 1-10 of 11 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- 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.
ICN-STL
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.
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.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington
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