$546+ Cheap flights from St. Louis (STL) to Seoul (SEL)
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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Jul 22 — Jul 291
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Seoul 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
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Best
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Cheapest flights from St. Louis to SeoulExplore the most affordable flight options available from St. Louis to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 22, 2026.
Explore the most affordable flight options available from St. Louis to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 22, 2026.
This Ovago deal was found by Cheapflights users on 6/17. 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 6/17![WestJet logo]()
$1,036
This Justfly.com deal was found by Cheapflights users on 6/22. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:30 am
STL
- ICN
2 stops46h 15m
WestJet
Sun 10/258:45 pm
ICN
- STL
2 stops40h 33m
WestJet
Deal found 6/22![WestJet logo]()
$1,061
This FlightHub deal was found by Cheapflights users on 6/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:45 pm
STL
- ICN
2 stops59h 00m
WestJet
Tue 10/278:45 pm
ICN
- STL
2 stops40h 33m
WestJet
Deal found 6/20![WestJet logo]()
$1,070
This Justfly.com deal was found by Cheapflights users on 6/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:47 pm
STL
- ICN
2 stops58h 58m
WestJet
Tue 9/158:45 pm
ICN
- STL
2 stops40h 35m
WestJet
Deal found 6/19![WestJet logo]()
$1,093
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:30 pm
STL
- ICN
2 stops59h 15m
WestJet
Mon 11/28:45 pm
ICN
- STL
2 stops41h 33m
WestJet
Deal found 6/21![WestJet logo]()
$1,169
This Air Canada deal was found by Cheapflights users on 6/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:15 pm
STL
- ICN
1 stop35h 10m
Air Canada
Wed 11/258:10 pm
ICN
- STL
1 stop34h 20m
Air Canada
Deal found 6/20![Air Canada logo]()
$1,205
This Air Canada deal was found by Cheapflights users on 6/19. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/192:40 pm
STL
- ICN
2 stops35h 25m
Air Canada
Wed 11/186:55 pm
ICN
- STL
2 stops35h 35m
Air Canada
Deal found 6/19![Air Canada logo]()
$1,206
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/712:10 pm
STL
- ICN
2 stops37h 55m
Air Canada
Wed 9/235:45 pm
ICN
- STL
2 stops40h 35m
Air Canada
Deal found 6/21![Air Canada logo]()
$1,211
This Air Canada deal was found by Cheapflights users on 6/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Fri 9/256:00 pm
ICN
- STL
2 stops34h 00m
Air Canada
Deal found 6/20![Air Canada logo]()
$1,241
This Justfly.com deal was found by Cheapflights users on 6/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:32 am
STL
- GMP
2 stops21h 43m
Japan Airlines
Tue 9/1512:05 pm
GMP
- STL
2 stops25h 35m
Japan Airlines
Deal found 6/19![Japan Airlines logo]()
$1,414
This FlightHub deal was found by Cheapflights users on 6/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/13:19 pm
STL
- GMP
2 stops31h 31m
Multiple Airlines
Sat 10/101:50 pm
GMP
- STL
2 stops48h 09m
Multiple Airlines
Deal found 6/20![Multiple Airlines logo]()
$1,416
This Rumbo deal was found by Cheapflights users on 6/19. 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 Rumbo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:32 am
STL
- GMP
2 stops21h 43m
Japan Airlines
Tue 8/2512:05 pm
GMP
- STL
2 stops24h 54m
Japan Airlines
Deal found 6/19![Japan Airlines logo]()
$1,475
Best flights from St. Louis to SeoulDiscover carefully curated flight deals from St. Louis to Seoul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 22, 2026.
Discover carefully curated flight deals from St. Louis to Seoul that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 22, 2026.
This Justfly.com deal was found by Cheapflights users on 6/19. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:32 am
STL
- GMP
2 stops21h 43m
Japan Airlines
Tue 9/1512:05 pm
GMP
- STL
2 stops25h 35m
Japan Airlines
Deal found 6/19![Japan Airlines logo]()
$1,414
This Delta deal was found by Cheapflights users on 6/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:24 am
STL
- ICN
1 stop28h 36m
Delta
Thu 8/207:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/21![Delta logo]()
$1,460
This United Airlines deal was found by Cheapflights users on 6/18. 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.
Thu 7/306:01 am
STL
- ICN
2 stops32h 19m
United Airlines
Thu 8/2011:30 am
ICN
- STL
1 stop21h 09m
United Airlines
Deal found 6/18![United Airlines logo]()
$1,460
This Orbitz deal was found by Cheapflights users on 6/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/298:55 am
STL
- GMP
2 stops23h 25m
Multiple Airlines
Thu 8/208:40 am
GMP
- STL
2 stops25h 42m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,662
This United Airlines deal was found by Cheapflights users on 6/20. 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.
Tue 7/286:01 am
STL
- ICN
2 stops32h 19m
United Airlines
Thu 8/2011:30 am
ICN
- STL
1 stop21h 09m
United Airlines
Deal found 6/20![United Airlines logo]()
$1,460
This Delta deal was found by Cheapflights users on 6/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2711:18 am
STL
- ICN
1 stop16h 02m
Delta
Thu 8/206:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/21![Delta logo]()
$1,460
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:00 am
STL
- ICN
1 stop18h 10m
Delta
Thu 8/206:50 pm
ICN
- STL
1 stop27h 18m
Delta
Deal found 6/22![Delta logo]()
$1,460
This United Airlines deal was found by Cheapflights users on 6/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/265:59 pm
STL
- ICN
2 stops31h 01m
United Airlines
Wed 8/124:50 pm
ICN
- STL
2 stops33h 50m
United Airlines
Deal found 6/21![United Airlines logo]()
$1,464
This BusinessClass deal was found by Cheapflights users on 6/22. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:55 am
STL
- GMP
2 stops24h 20m
Japan Airlines
Thu 8/208:00 am
GMP
- STL
2 stops22h 23m
Japan Airlines
Deal found 6/22![Japan Airlines logo]()
$1,635
This Japan Airlines deal was found by Cheapflights users on 6/18. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/268:38 am
STL
- GMP
2 stops22h 37m
Multiple Airlines
Wed 8/198:00 am
GMP
- STL
2 stops22h 24m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,765
This KAYAK deal was found by Cheapflights users on 6/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/296:37 am
STL
- GMP
2 stops24h 38m
Japan Airlines
Thu 8/208:00 am
GMP
- STL
2 stops25h 51m
Japan Airlines
Deal found 6/19![Japan Airlines logo]()
$1,707
This FlightHub deal was found by Cheapflights users on 6/22. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:37 am
STL
- GMP
2 stops24h 38m
Japan Airlines
Thu 8/208:00 am
GMP
- STL
2 stops28h 59m
Japan Airlines
Deal found 6/22![Japan Airlines logo]()
$1,744
Last-minute flights from St. Louis to SeoulDiscover last-minute flight deals from St. Louis to Seoul. Data last updated June 22, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Seoul. Data last updated June 22, 2026 and is based on user searches.
This Air Canada deal was found by Cheapflights users on 6/21. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/32:40 pm
STL
- ICN
2 stops35h 25m
Air Canada
Fri 7/107:05 pm
ICN
- STL
1 stop32h 57m
Air Canada
Deal found 6/21![Air Canada logo]()
$1,471
This Trip.com deal was found by Cheapflights users on 6/17. 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.
Thu 7/168:08 pm
STL
- ICN
2 stops42h 22m
Multiple Airlines
Thu 7/231:00 pm
ICN
- STL
2 stops44h 23m
Multiple Airlines
Deal found 6/17![Multiple Airlines logo]()
$1,404
This Delta deal was found by Cheapflights users on 6/22. 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 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 6/22![Delta logo]()
$1,465
This Delta deal was found by Cheapflights users on 6/22. 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 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
Tue 8/186:50 pm
ICN
- STL
1 stop18h 31m
Delta
Deal found 6/22![Delta logo]()
$1,467
This United Airlines deal was found by Cheapflights users on 6/22. 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.
Sun 7/267:23 pm
STL
- ICN
1 stop29h 37m
United Airlines
Wed 8/124:50 pm
ICN
- STL
2 stops33h 50m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,475
This KAYAK deal was found by Cheapflights users on 6/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:37 am
STL
- GMP
2 stops24h 38m
Japan Airlines
Wed 8/197:15 pm
GMP
- STL
2 stops35h 08m
Japan Airlines
Deal found 6/20![Japan Airlines logo]()
$1,638
This Ovago deal was found by Cheapflights users on 6/21. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/281:22 pm
STL
- ICN
2 stops39h 23m
WestJet
Thu 8/208:45 pm
ICN
- STL
2 stops27h 09m
WestJet
Deal found 6/21![WestJet logo]()
$1,410
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/289:24 am
STL
- ICN
1 stop28h 36m
Delta
Thu 8/207:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 6/22![Delta logo]()
$1,460
This United Airlines deal was found by Cheapflights users on 6/22. 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.
Tue 7/283:22 pm
STL
- ICN
2 stops22h 58m
United Airlines
Thu 8/204:50 pm
ICN
- STL
2 stops20h 09m
United Airlines
Deal found 6/22![United Airlines logo]()
$1,464
This BusinessClass deal was found by Cheapflights users on 6/22. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:55 am
STL
- GMP
2 stops24h 20m
Japan Airlines
Thu 8/208:00 am
GMP
- STL
2 stops22h 23m
Japan Airlines
Deal found 6/22![Japan Airlines logo]()
$1,635
This Ovago deal was found by Cheapflights users on 6/21. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/293:58 pm
STL
- ICN
2 stops36h 47m
WestJet
Thu 8/208:45 pm
ICN
- STL
2 stops27h 09m
WestJet
Deal found 6/21![WestJet logo]()
$1,418
This Orbitz deal was found by Cheapflights users on 6/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/298:55 am
STL
- GMP
2 stops23h 25m
Multiple Airlines
Thu 8/208:40 am
GMP
- STL
2 stops25h 42m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$1,662
One-way flights from St. Louis to SeoulSearch for one-way flight options from St. Louis to Seoul. Find affordable one-way fares based on user searches. Data last updated June 22, 2026.
Search for one-way flight options from St. Louis to Seoul. Find affordable one-way fares based on user searches. Data last updated June 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/21. 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.
Mon 9/76:17 pm
STL
- ICN
3 stops58h 28m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$546
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:23 pm
STL
- ICN
2 stops59h 22m
WestJet
Deal found 6/21![WestJet logo]()
$577
This Air Canada deal was found by Cheapflights users on 6/21. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/712:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Deal found 6/21![Air Canada logo]()
$640
This BusinessClass deal was found by Cheapflights users on 6/21. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/78:55 am
STL
- GMP
2 stops35h 45m
Multiple Airlines
Deal found 6/21![Multiple Airlines logo]()
$682
Find flight deals from St. Louis to Seoul
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Seoul (SEL). 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 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,036 (Ovago) |
One-way from | $546 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $1,473 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Seoul 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 22, 2026.
Use the filters below to find and compare flights from St. Louis to Seoul that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Tue 9/8
9:32 am-9:15 pm
2 stops21h 43m
Seoul Gimpo Intl
Tue 9/15
12:05 pm-11:40 pm
2 stops25h 35m
$1,414
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 7/28
9:24 am-4:00 am
1 stop28h 36m
Incheon Intl
Thu 8/20
7:20 pm-12:41 am
1 stop19h 21m
$1,460
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
6:01 am-4:20 am
2 stops32h 19m
Incheon Intl
Thu 8/20
11:30 am-6:39 pm
1 stop21h 09m
$1,460
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Tue 7/28
6:01 am-4:20 am
2 stops32h 19m
Incheon Intl
Thu 8/20
11:30 am-6:39 pm
1 stop21h 09m
$1,460
Quickest round-trip
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 7/27
11:18 am-5:20 pm
1 stop16h 02m
Incheon Intl
Thu 8/20
6:50 pm-8:08 am
1 stop27h 18m
$1,460
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
6:00 am-2:10 pm
1 stop18h 10m
Incheon Intl
Thu 8/20
6:50 pm-8:08 am
1 stop27h 18m
$1,460
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 7/26
5:59 pm-3:00 pm
2 stops31h 01m
Incheon Intl
Wed 8/12
4:50 pm-12:40 pm
2 stops33h 50m
$1,464
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Tue 7/28
6:55 am-9:15 pm
2 stops24h 20m
Seoul Gimpo Intl
Thu 8/20
8:00 am-4:23 pm
2 stops22h 23m
$1,635
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Wed 7/29
8:55 am-10:20 pm
2 stops23h 25m
Seoul Gimpo Intl
Thu 8/20
8:40 am-8:22 pm
2 stops25h 42m
$1,662
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Wed 7/29
6:37 am-9:15 pm
2 stops24h 38m
Seoul Gimpo Intl
Thu 8/20
8:00 am-7:51 pm
2 stops25h 51m
$1,707
Showing 1-10 of 16 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Seoul
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 Seoul 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 |
- Most accurate provider: When it comes to deals on St. Louis-Seoul flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Seoul flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Seoul flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Seoul 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-Seoul 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 Seoul
Have a flexible travel schedule? Discover the best time to fly to Seoul from St. Louis with our price prediction graph.
STL-SEL
STL-ICN
STL-GMP
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 Seoul
STL-SEL
STL-ICN
STL-GMP
What is the cheapest month to book a flight from St. Louis to Seoul?
Currently, March is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $745). Flying from St. Louis to Seoul in June is currently the most expensive (average of $1,083). 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 Seoul?
Reviews of airlines servicing Seoul
Get insights into the airlines that provide service to Seoul. 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 Seoul. Reviews last updated June 22, 2026.
Read reviews from past customers who have flown Korean Air,Delta, andUnited Airlines from St. Louis to Seoul. 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
Boarding
8.5
Comfort
8.3
Overall
8.4
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Boarding
8.5
Comfort
8.3
Overall
8.4
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Boarding
8.5
Comfort
8.3
Overall
8.4
Food
8.1
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Boarding
8.5
Comfort
8.3
Overall
8.4
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 Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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St. Louis and Seoul flights
Browse other St. Louis and Seoul flight options. Last updated on June 22, 2026.
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Top 3 airlines flying from St. Louis to Seoul
Discover the top 3 airlines that operate flights from St. Louis to Seoul. 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 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$846 | Average$970 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$865 | Average$1,164 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$999 | Average$1,629 | FlexibilityNo cancel fee | On-time81% |