$455+ Cheap flights from St. Louis (STL) to Incheon Intl (ICN)
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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Aug 22 — Aug 291
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to Incheon Intl 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 St. Louis to Incheon Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from St. Louis to Incheon IntlExplore the most affordable flight options available from St. Louis to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
Explore the most affordable flight options available from St. Louis to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 23, 2026.
This American Airlines deal was found by Cheapflights users on 7/19. 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 9/26:36 am
STL
- ICN
1 stop19h 09m
American Airlines
Wed 9/95:50 pm
ICN
- STL
2 stops20h 37m
American Airlines
Deal found 7/19![American Airlines logo]()
$1,093
This United Airlines deal was found by Cheapflights users on 7/23. 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 10/57:08 am
STL
- ICN
1 stop17h 52m
United Airlines
Wed 11/46:00 pm
ICN
- STL
1 stop19h 10m
United Airlines
Deal found 7/23![United Airlines logo]()
$1,106
This American Airlines deal was found by Cheapflights users on 7/21. 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.
Mon 10/266:32 am
STL
- ICN
1 stop19h 53m
American Airlines
Wed 11/256:50 pm
ICN
- STL
1 stop29h 40m
American Airlines
Deal found 7/21![American Airlines logo]()
$1,112
This Cathay Pacific deal was found by Cheapflights users on 7/21. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:29 am
STL
- ICN
2 stops25h 56m
Multiple Airlines
Sun 10/48:05 pm
ICN
- STL
2 stops39h 03m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$1,120
This Cathay Pacific deal was found by Cheapflights users on 7/20. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:00 am
STL
- ICN
2 stops28h 25m
Multiple Airlines
Wed 9/238:00 am
ICN
- STL
2 stops29h 43m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$1,121
This Delta deal was found by Cheapflights users on 7/19. 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.
Wed 9/168:46 am
STL
- ICN
1 stop18h 34m
Delta
Fri 9/257:40 pm
ICN
- STL
1 stop17h 36m
Delta
Deal found 7/19![Delta logo]()
$1,156
This United Airlines deal was found by Cheapflights users on 7/22. 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.
Wed 9/164:40 pm
STL
- ICN
2 stops21h 40m
United Airlines
Fri 9/2511:30 am
ICN
- STL
2 stops23h 51m
United Airlines
Deal found 7/22![United Airlines logo]()
$1,161
This American Airlines deal was found by Cheapflights users on 7/22. 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 10/187:10 pm
STL
- ICN
1 stop30h 35m
American Airlines
Fri 10/306:50 pm
ICN
- STL
1 stop18h 52m
American Airlines
Deal found 7/22![American Airlines logo]()
$1,162
This Cathay Pacific deal was found by Cheapflights users on 7/22. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:10 pm
STL
- ICN
2 stops28h 55m
Multiple Airlines
Sun 10/257:35 pm
ICN
- STL
2 stops42h 11m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$1,170
Best flights from St. Louis to Incheon IntlDiscover carefully curated flight deals from St. Louis to Incheon Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
Discover carefully curated flight deals from St. Louis to Incheon Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 23, 2026.
This United Airlines deal was found by Cheapflights users on 7/23. 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 10/51:29 pm
STL
- ICN
2 stops24h 51m
United Airlines
Wed 11/46:00 pm
ICN
- STL
1 stop19h 10m
United Airlines
Deal found 7/23![United Airlines logo]()
$1,111
This Delta deal was found by Cheapflights users on 7/19. 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.
Mon 10/56:00 am
STL
- ICN
2 stops21h 20m
Delta
Wed 11/49:35 am
ICN
- STL
2 stops21h 48m
Delta
Deal found 7/19![Delta logo]()
$1,111
This Cathay Pacific deal was found by Cheapflights users on 7/21. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:29 am
STL
- ICN
2 stops25h 56m
Multiple Airlines
Sun 10/48:05 pm
ICN
- STL
2 stops39h 03m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$1,120
This Cathay Pacific deal was found by Cheapflights users on 7/22. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:20 pm
STL
- ICN
2 stops32h 35m
Multiple Airlines
Wed 11/2510:00 am
ICN
- STL
2 stops28h 35m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$1,121
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Wed 9/25:30 pm
STL
- ICN
2 stops20h 50m
United Airlines
Wed 9/2311:30 am
ICN
- STL
1 stop21h 09m
United Airlines
Deal found 7/20![United Airlines logo]()
$1,156
This Delta deal was found by Cheapflights users on 7/18. 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.
Wed 9/168:46 am
STL
- ICN
1 stop18h 34m
Delta
Fri 9/257:40 pm
ICN
- STL
1 stop17h 36m
Delta
Deal found 7/18![Delta logo]()
$1,156
This United Airlines deal was found by Cheapflights users on 7/18. 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.
Wed 9/164:40 pm
STL
- ICN
2 stops21h 40m
United Airlines
Fri 9/2511:30 am
ICN
- STL
2 stops23h 51m
United Airlines
Deal found 7/18![United Airlines logo]()
$1,161
This Cathay Pacific deal was found by Cheapflights users on 7/18. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:02 am
STL
- ICN
2 stops26h 23m
Multiple Airlines
Mon 8/248:00 am
ICN
- STL
2 stops28h 59m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$1,196
This Delta deal was found by Cheapflights users on 7/23. 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.
Sun 8/236:20 am
STL
- ICN
1 stop21h 00m
Delta
Sun 8/307:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 7/23![Delta logo]()
$1,256
This Delta deal was found by Cheapflights users on 7/20. 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.
Tue 8/189:15 am
STL
- ICN
1 stop28h 45m
Delta
Mon 8/247:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 7/20![Delta logo]()
$1,258
Last-minute flights from St. Louis to Incheon IntlDiscover last-minute flight deals from St. Louis to Incheon Intl. Data last updated July 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Incheon Intl. Data last updated July 23, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 7/20. 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.
Sun 7/265:36 pm
STL
- ICN
1 stop33h 44m
Delta
Wed 8/127:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 7/20![Delta logo]()
$1,264
This Delta deal was found by Cheapflights users on 7/23. 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.
Tue 7/288:00 am
STL
- ICN
1 stop17h 20m
Delta
Tue 8/46:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 7/23![Delta logo]()
$1,258
This Delta deal was found by Cheapflights users on 7/18. 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.
Tue 8/185:23 pm
STL
- ICN
1 stop20h 37m
Delta
Tue 8/256:50 pm
ICN
- STL
1 stop18h 31m
Delta
Deal found 7/18![Delta logo]()
$1,106
This United Airlines deal was found by Cheapflights users on 7/18. 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 8/185:30 pm
STL
- ICN
2 stops20h 50m
United Airlines
Tue 8/2511:30 am
ICN
- STL
2 stops23h 16m
United Airlines
Deal found 7/18![United Airlines logo]()
$1,111
This Cathay Pacific deal was found by Cheapflights users on 7/18. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:02 am
STL
- ICN
2 stops26h 23m
Multiple Airlines
Mon 8/248:00 am
ICN
- STL
2 stops28h 59m
Multiple Airlines
Deal found 7/18![Multiple Airlines logo]()
$1,196
This Delta deal was found by Cheapflights users on 7/19. 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.
Thu 8/206:00 am
STL
- ICN
1 stop18h 10m
Delta
Fri 8/286:50 pm
ICN
- STL
1 stop19h 08m
Delta
Deal found 7/19![Delta logo]()
$1,156
This United Airlines deal was found by Cheapflights users on 7/19. 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 8/206:59 pm
STL
- ICN
2 stops19h 21m
United Airlines
Fri 8/2811:30 am
ICN
- STL
2 stops23h 16m
United Airlines
Deal found 7/19![United Airlines logo]()
$1,161
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/235:10 am
STL
- ICN
2 stops19h 50m
United Airlines
Sun 8/3011:30 am
ICN
- STL
1 stop20h 29m
United Airlines
Deal found 7/23![United Airlines logo]()
$1,206
This Delta deal was found by Cheapflights users on 7/23. 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.
Sun 8/236:20 am
STL
- ICN
1 stop21h 00m
Delta
Sun 8/307:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 7/23![Delta logo]()
$1,256
One-way flights from St. Louis to Incheon IntlSearch for one-way flight options from St. Louis to Incheon Intl. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
Search for one-way flight options from St. Louis to Incheon Intl. Find affordable one-way fares based on user searches. Data last updated July 23, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/19. 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 8/286:17 pm
STL
- ICN
2 stops34h 28m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/144:57 pm
STL
- ICN
3 stops59h 48m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$472
This Kiwi.com deal was found by Cheapflights users on 7/22. 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 8/58:08 pm
STL
- ICN
2 stops32h 37m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$516
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 11/410:35 am
STL
- ICN
2 stops40h 10m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Sat 8/296:45 pm
STL
- ICN
3 stops56h 20m
Multiple Airlines
Deal found 7/19![Multiple Airlines logo]()
$535
This Cathay Pacific deal was found by Cheapflights users on 7/22. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:21 am
STL
- ICN
2 stops39h 19m
Multiple Airlines
Deal found 7/22![Multiple Airlines logo]()
$587
This Booking.com deal was found by Cheapflights users on 7/21. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:00 am
STL
- ICN
1 stop19h 35m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$603
Find flight deals from St. Louis to Incheon Intl
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Incheon Intl (ICN). 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 July 23, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,093 (American Airlines) |
One-way from | $455 (Kiwi.com) |
Popular in | July |
Cheapest in | December |
Average price | $1,510 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Incheon Intl 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 July 23, 2026.
Use the filters below to find and compare flights from St. Louis to Incheon Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 10/5
1:29 pm-4:20 am
2 stops24h 51m
Incheon Intl
Wed 11/4
6:00 pm-10:10 pm
1 stop19h 10m
$1,111
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 10/5
6:00 am-5:20 pm
2 stops21h 20m
Incheon Intl
Wed 11/4
9:35 am-4:23 pm
2 stops21h 48m
$1,111
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 9/23
6:29 am-10:25 pm
2 stops25h 56m
Incheon Intl
Sun 10/4
8:05 pm-9:08 pm
2 stops39h 03m
$1,120
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 10/26
3:20 pm-1:55 pm
2 stops32h 35m
Incheon Intl
Wed 11/25
10:00 am-11:35 pm
2 stops28h 35m
$1,121
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 9/2
5:30 pm-4:20 am
2 stops20h 50m
Incheon Intl
Wed 9/23
11:30 am-6:39 pm
1 stop21h 09m
$1,156
Quickest round-trip
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 9/16
8:46 am-5:20 pm
1 stop18h 34m
Incheon Intl
Fri 9/25
7:40 pm-11:16 pm
1 stop17h 36m
$1,156
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 9/16
4:40 pm-4:20 am
2 stops21h 40m
Incheon Intl
Fri 9/25
11:30 am-9:21 pm
2 stops23h 51m
$1,161
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 8/18
6:02 am-10:25 pm
2 stops26h 23m
Incheon Intl
Mon 8/24
8:00 am-10:59 pm
2 stops28h 59m
$1,196
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 8/23
6:20 am-5:20 pm
1 stop21h 00m
Incheon Intl
Sun 8/30
7:20 pm-12:41 am
1 stop19h 21m
$1,256
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 8/18
9:15 am-4:00 am
1 stop28h 45m
Incheon Intl
Mon 8/24
7:20 pm-12:41 am
1 stop19h 21m
$1,258
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Incheon Intl
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 St. Louis to Incheon Intl in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-Incheon Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Incheon Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Incheon Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Incheon Intl Airport 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 St. Louis-Incheon Intl Airport 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 St. Louis to Incheon Intl
Have a flexible travel schedule? Discover the best time to fly to Incheon Intl from St. Louis with our price prediction graph.
STL-ICN
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 St. Louis to Incheon Intl Airport
What is the cheapest month to book a flight from St. Louis to Incheon Intl Airport?
Currently, December is the cheapest month in which you can book a flight from St. Louis to Incheon Intl Airport (average of $846). Flying from St. Louis to Incheon Intl Airport in July is currently the most expensive (average of $1,510). 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.
How much does it cost to fly round-trip from St. Louis to Incheon Intl Airport?
Airfare is below average for this route at the moment.
St. Louis to Incheon Intl Airport flights typically cost between $1,358 and $1,792 in September.The cheapest round-trip price found within the last 5 days was $1,093 on American Airlines (Sep 2-Sep 9).
Reviews of airlines servicing Incheon Intl
Get insights into the airlines that provide service to Incheon Intl. 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 Incheon Intl. Reviews last updated July 23, 2026.
Read reviews from past customers who have flown Korean Air,Delta, andUnited Airlines from St. Louis to Incheon Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.3
Crew
8.7
Food
8.1
Boarding
8.5
Entertainment
8.2
Overall
8.4
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Crew
8.7
Food
8.1
Boarding
8.5
Entertainment
8.2
Overall
8.4
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Crew
8.7
Food
8.1
Boarding
8.5
Entertainment
8.2
Overall
8.4
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Crew
8.7
Food
8.1
Boarding
8.5
Entertainment
8.2
Overall
8.4
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Incheon Intl. 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 Incheon Intl Airport?
Book flights to Incheon Intl Airport if you plan to visit one of these locationsSeongnam
Suwon
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
Complete your trip
Flights by cabin class
Incheon Intl flight routes
Other flight options
Other flights from St. Louis
Popular flights
Alternative routes for St. Louis to Incheon Intl
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Incheon Intl by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Incheon Intl by cabin class
Find flights from St. Louis to Incheon Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Incheon Intl
Explore flights to Incheon Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 23, 2026.
St. Louis and Incheon Intl flights
Browse other St. Louis and Incheon Intl flight options. Last updated on July 23, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on July 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from St. Louis to Incheon Intl
Discover the top 3 airlines that operate flights from St. Louis to Incheon Intl. 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 July 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$846 | Average$1,034 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$865 | Average$1,181 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$999 | Average$1,624 | FlexibilityNo cancel fee | On-time81% |