$449+ 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 8/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Jul 5 — Jul 121
Round-trip
1 adult, Economy
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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
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Last-minute
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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 June 5, 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 June 5, 2026.
This Ovago deal was found by Cheapflights users on 6/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:55 pm
STL
- ICN
2 stops38h 50m
WestJet
Fri 9/258:45 pm
ICN
- STL
2 stops26h 49m
WestJet
Deal found 6/3![WestJet logo]()
$1,151
This Cathay Pacific deal was found by Cheapflights users on 6/3. 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 9/236:30 am
STL
- ICN
2 stops27h 55m
Multiple Airlines
Tue 10/131:55 am
ICN
- STL
2 stops32h 13m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,183
This Qatar Airways deal was found by Cheapflights users on 6/2. 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 11/117:00 am
STL
- ICN
2 stops36h 30m
Qatar Airways
Tue 12/112:20 am
ICN
- STL
2 stops38h 39m
Qatar Airways
Deal found 6/2![Qatar Airways logo]()
$1,211
This Cathay Pacific deal was found by Cheapflights users on 6/1. 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 9/166:30 am
STL
- ICN
2 stops27h 55m
Multiple Airlines
Fri 9/258:00 am
ICN
- STL
2 stops29h 43m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$1,233
This Qatar Airways deal was found by Cheapflights users on 6/2. 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.
Fri 11/137:00 am
STL
- ICN
2 stops43h 15m
Qatar Airways
Tue 12/112:20 am
ICN
- STL
2 stops38h 39m
Qatar Airways
Deal found 6/2![Qatar Airways logo]()
$1,251
This Air Canada deal was found by Cheapflights users on 6/3. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2312:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Wed 10/147:05 pm
ICN
- STL
1 stop32h 55m
Air Canada
Deal found 6/3![Air Canada logo]()
$1,255
This Air Canada deal was found by Cheapflights users on 6/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:40 pm
STL
- ICN
2 stops35h 25m
Air Canada
Mon 10/265:55 pm
ICN
- STL
2 stops35h 35m
Air Canada
Deal found 6/2![Air Canada logo]()
$1,260
This Orbitz deal was found by Cheapflights users on 5/31. 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.
Tue 9/12:40 pm
STL
- ICN
1 stop36h 50m
Air Canada
Wed 9/96:00 pm
ICN
- STL
2 stops34h 00m
Air Canada
Deal found 5/31![Air Canada logo]()
$1,263
This FlightHub deal was found by Cheapflights users on 6/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/512:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Mon 8/177:05 pm
ICN
- STL
1 stop32h 57m
Air Canada
Deal found 6/4![Air Canada logo]()
$1,265
This Justfly.com deal was found by Cheapflights users on 6/4. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/412:10 pm
STL
- ICN
2 stops61h 55m
Air Canada
Wed 8/197:05 pm
ICN
- STL
2 stops37h 37m
Air Canada
Deal found 6/4![Air Canada logo]()
$1,268
This Justfly.com deal was found by Cheapflights users on 6/2. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/154:15 pm
STL
- ICN
2 stops33h 55m
Air Canada
Mon 11/306:55 pm
ICN
- STL
2 stops35h 35m
Air Canada
Deal found 6/2![Air Canada logo]()
$1,270
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 June 5, 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 June 5, 2026.
This Cathay Pacific deal was found by Cheapflights users on 6/2. 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 9/2910:14 am
STL
- ICN
2 stops36h 26m
Multiple Airlines
Wed 10/78:00 am
ICN
- STL
2 stops29h 59m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,183
This Delta deal was found by Cheapflights users on 6/2. 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 8/26:58 pm
STL
- ICN
1 stop29h 12m
Delta
Tue 8/187:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/2![Delta logo]()
$1,420
This Alaska Airlines deal was found by Cheapflights users on 6/4. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am
STL
- ICN
1 stop21h 30m
Alaska Airlines
Mon 9/147:35 pm
ICN
- STL
1 stop18h 24m
Alaska Airlines
Deal found 6/4![Alaska Airlines logo]()
$1,420
This Air Canada deal was found by Cheapflights users on 6/4. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:55 am
STL
- ICN
1 stop18h 35m
Air Canada
Mon 9/145:45 pm
ICN
- STL
2 stops34h 15m
Air Canada
Deal found 6/4![Air Canada logo]()
$1,421
This United Airlines deal was found by Cheapflights users on 6/3. 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 8/2412:59 pm
STL
- ICN
2 stops25h 21m
United Airlines
Wed 8/264:50 pm
ICN
- STL
2 stops20h 50m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,425
This Delta deal was found by Cheapflights users on 5/31. 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 7/296:21 am
STL
- ICN
2 stops20h 29m
Delta
Fri 8/217:00 pm
ICN
- STL
2 stops29h 23m
Delta
Deal found 5/31![Delta logo]()
$1,425
This Delta deal was found by Cheapflights users on 5/31. 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 7/306:00 am
STL
- ICN
2 stops20h 25m
Delta
Sun 8/167:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 5/31![Delta logo]()
$1,425
This Delta deal was found by Cheapflights users on 6/1. 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 7/306:00 am
STL
- ICN
2 stops20h 25m
Delta
Fri 8/217:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/1![Delta logo]()
$1,425
This Delta deal was found by Cheapflights users on 6/3. 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 7/286:21 am
STL
- ICN
2 stops20h 29m
Delta
Sun 8/167:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/3![Delta logo]()
$1,425
This Delta deal was found by Cheapflights users on 6/1. 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 7/266:58 pm
STL
- ICN
1 stop29h 12m
Delta
Wed 8/197:00 pm
ICN
- STL
2 stops29h 23m
Delta
Deal found 6/1![Delta logo]()
$1,431
This Delta deal was found by Cheapflights users on 5/31. 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 7/266:58 pm
STL
- ICN
1 stop29h 12m
Delta
Fri 8/217:00 pm
ICN
- STL
2 stops29h 23m
Delta
Deal found 5/31![Delta logo]()
$1,431
Last-minute flights from St. Louis to Incheon IntlDiscover last-minute flight deals from St. Louis to Incheon Intl. Data last updated June 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Incheon Intl. Data last updated June 5, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 5/31. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/71:05 pm
STL
- ICN
2 stops37h 00m
Air Canada
Mon 6/155:45 pm
ICN
- STL
2 stops32h 21m
Air Canada
Deal found 5/31![Air Canada logo]()
$1,393
This Delta deal was found by Cheapflights users on 6/1. 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 7/262:30 pm
STL
- ICN
1 stop34h 50m
Delta
Wed 8/126:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/1![Delta logo]()
$1,426
This Delta deal was found by Cheapflights users on 6/1. 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 7/266:58 pm
STL
- ICN
1 stop29h 12m
Delta
Sun 8/167:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/1![Delta logo]()
$1,427
This Delta deal was found by Cheapflights users on 6/3. 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 7/267:55 pm
STL
- ICN
1 stop29h 25m
Delta
Fri 8/217:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/3![Delta logo]()
$1,429
This Delta deal was found by Cheapflights users on 6/1. 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 7/266:58 pm
STL
- ICN
1 stop29h 12m
Delta
Wed 8/197:00 pm
ICN
- STL
2 stops29h 23m
Delta
Deal found 6/1![Delta logo]()
$1,431
This United Airlines deal was found by Cheapflights users on 6/3. 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 7/276:01 am
STL
- ICN
2 stops32h 19m
United Airlines
Thu 8/204:50 pm
ICN
- STL
2 stops36h 48m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,437
This Qatar Airways deal was found by Cheapflights users on 5/31. 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.
Tue 7/2811:00 am
STL
- ICN
2 stops40h 05m
Qatar Airways
Thu 8/201:20 am
ICN
- STL
2 stops50h 46m
Qatar Airways
Deal found 5/31![Qatar Airways logo]()
$1,415
This Cathay Pacific deal was found by Cheapflights users on 6/1. 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 7/286:37 am
STL
- ICN
2 stops27h 48m
Multiple Airlines
Tue 8/188:00 am
ICN
- STL
2 stops29h 42m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$1,418
This Delta deal was found by Cheapflights users on 6/1. 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 7/306:58 pm
STL
- ICN
1 stop19h 02m
Delta
Wed 8/196:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/1![Delta logo]()
$1,420
This United Airlines deal was found by Cheapflights users on 6/3. 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 7/309:20 am
STL
- ICN
2 stops29h 00m
United Airlines
Thu 8/204:50 pm
ICN
- STL
2 stops36h 48m
United Airlines
Deal found 6/3![United Airlines logo]()
$1,441
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 June 5, 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 June 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/228:08 pm
STL
- ICN
2 stops32h 37m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$449
This Kiwi.com deal was found by Cheapflights users on 5/31. 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.
Mon 8/174:57 pm
STL
- ICN
2 stops59h 48m
Multiple Airlines
Deal found 5/31![Multiple Airlines logo]()
$500
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 7/241:22 pm
STL
- ICN
3 stops42h 18m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$623
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Thu 7/233:41 pm
STL
- ICN
2 stops39h 59m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$653
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 June 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,151 (Ovago) |
One-way from | $449 (Kiwi.com) |
Popular in | July |
Cheapest in | December |
Average price | $1,530 |
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 June 5, 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
Tue 9/29
10:14 am-12:40 pm
2 stops36h 26m
Incheon Intl
Wed 10/7
8:00 am-11:59 pm
2 stops29h 59m
$1,183
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 8/2
6:58 pm-2:10 pm
1 stop29h 12m
Incheon Intl
Tue 8/18
7:20 pm-12:41 am
1 stop19h 21m
$1,420
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 9/10
6:00 am-5:30 pm
1 stop21h 30m
Incheon Intl
Mon 9/14
7:35 pm-11:59 pm
1 stop18h 24m
$1,420
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 9/10
8:55 am-5:30 pm
1 stop18h 35m
Incheon Intl
Mon 9/14
5:45 pm-2:00 pm
2 stops34h 15m
$1,421
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 8/24
12:59 pm-4:20 am
2 stops25h 21m
Incheon Intl
Wed 8/26
4:50 pm-11:40 pm
2 stops20h 50m
$1,425
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 7/29
6:21 am-4:50 pm
2 stops20h 29m
Incheon Intl
Fri 8/21
7:00 pm-10:23 am
2 stops29h 23m
$1,425
Quickest round-trip
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
6:00 am-4:25 pm
2 stops20h 25m
Incheon Intl
Sun 8/16
7:20 pm-12:41 am
1 stop19h 21m
$1,425
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
6:00 am-4:25 pm
2 stops20h 25m
Incheon Intl
Fri 8/21
7:20 pm-12:41 am
1 stop19h 21m
$1,425
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 7/28
6:21 am-4:50 pm
2 stops20h 29m
Incheon Intl
Sun 8/16
7:20 pm-12:41 am
1 stop19h 21m
$1,425
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 7/26
6:58 pm-2:10 pm
1 stop29h 12m
Incheon Intl
Wed 8/19
7:00 pm-10:23 am
2 stops29h 23m
$1,431
Showing 1-10 of 20 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 June.
| 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 $1,622). 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?
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 June 5, 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.
Entertainment
8.2
Crew
8.7
Overall
8.4
Boarding
8.5
Comfort
8.3
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Overall
8.4
Boarding
8.5
Comfort
8.3
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Overall
8.4
Boarding
8.5
Comfort
8.3
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Overall
8.4
Boarding
8.5
Comfort
8.3
Food
8.1
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
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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 June 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$846 | Average$961 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$865 | Average$1,164 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$999 | Average$1,624 | FlexibilityNo cancel fee | On-time81% |