$455+ Cheap flights from St. Louis (STL) to Seoul (SEL)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Oct 25 — Nov 11
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
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 Seoul
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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 September 25, 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 September 25, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/25. 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 10/266:04 am -
2 stops28h 36m
Wed 11/257:35 pm -
2 stops35h 59m
Deal found 9/25![Multiple Airlines logo]()
$1,091
This Delta deal was found by Cheapflights users on 9/24. 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 10/56:15 am -
1 stop21h 05m
Mon 10/194:25 pm -
1 stop18h 58m
Deal found 9/24![Delta logo]()
$1,096
This Gurufare deal was found by Cheapflights users on 9/22. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:10 pm -
2 stops39h 15m
Tue 10/277:35 pm -
2 stops39h 22m
Deal found 9/22![Cathay Pacific logo]()
$1,097
This Delta deal was found by Cheapflights users on 9/25. 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 10/266:00 am -
2 stops20h 50m
Wed 11/257:25 pm -
1 stop19h 31m
Deal found 9/25![Delta logo]()
$1,100
This BusinessClass deal was found by Cheapflights users on 9/23. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:06 pm -
2 stops38h 34m
Wed 11/187:35 pm -
2 stops38h 52m
Deal found 9/23![Cathay Pacific logo]()
$1,126
This Cathay Pacific deal was found by Cheapflights users on 9/23. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:04 am -
2 stops47h 01m
Tue 10/271:55 am -
2 stops35h 51m
Deal found 9/23![Multiple Airlines logo]()
$1,135
This Cathay Pacific deal was found by Cheapflights users on 9/24. 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 10/146:04 am -
2 stops42h 01m
Thu 10/228:00 am -
2 stops30h 19m
Deal found 9/24![Multiple Airlines logo]()
$1,136
This Cathay Pacific deal was found by Cheapflights users on 9/24. 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 11/246:00 am -
2 stops27h 40m
Thu 12/31:55 am -
2 stops32h 27m
Deal found 9/24![Multiple Airlines logo]()
$1,141
This Expedia deal was found by Cheapflights users on 9/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:26 am -
2 stops50h 14m
Wed 11/257:35 pm -
2 stops57h 47m
Deal found 9/23![Multiple Airlines logo]()
$1,144
This Air Canada deal was found by Cheapflights users on 9/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:05 pm -
2 stops34h 05m
Wed 11/258:10 pm -
1 stop34h 16m
Deal found 9/23![Air Canada logo]()
$1,169
This KAYAK deal was found by Cheapflights users on 9/20. 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.
Tue 11/246:55 pm -
2 stops35h 30m
Thu 12/31:55 am -
2 stops32h 27m
Deal found 9/20![Cathay Pacific logo]()
$1,173
This FlightHub deal was found by Cheapflights users on 9/24. 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 11/114:05 pm -
1 stop35h 20m
Tue 11/248:10 pm -
1 stop34h 16m
Deal found 9/24![Air Canada logo]()
$1,179
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 September 25, 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 September 25, 2026.
This Cathay Pacific deal was found by Cheapflights users on 9/22. 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 10/266:04 am -
2 stops28h 36m
Wed 11/257:35 pm -
2 stops35h 59m
Deal found 9/22![Multiple Airlines logo]()
$1,091
This Delta deal was found by Cheapflights users on 9/24. 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 10/56:15 am -
1 stop21h 05m
Mon 10/194:25 pm -
1 stop18h 58m
Deal found 9/24![Delta logo]()
$1,096
This Expedia deal was found by Cheapflights users on 9/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:25 am -
2 stops43h 55m
Fri 11/138:15 am -
2 stops23h 28m
Deal found 9/21![Japan Airlines logo]()
$1,484
This Delta deal was found by Cheapflights users on 9/25. 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 2/36:45 am -
1 stop19h 05m
Wed 2/179:35 am -
2 stops23h 26m
Deal found 9/25![Delta logo]()
$1,100
This Cathay Pacific deal was found by Cheapflights users on 9/24. 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 10/146:04 am -
2 stops42h 01m
Thu 10/228:00 am -
2 stops30h 19m
Deal found 9/24![Multiple Airlines logo]()
$1,136
This Cathay Pacific deal was found by Cheapflights users on 9/20. 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 10/211:06 pm -
2 stops33h 34m
Fri 10/307:35 pm -
2 stops42h 11m
Deal found 9/20![Multiple Airlines logo]()
$1,141
This Delta deal was found by Cheapflights users on 9/22. 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 10/227:45 am -
1 stop17h 35m
Thu 10/299:35 am -
1 stop18h 18m
Deal found 9/22![Delta logo]()
$1,196
This Delta deal was found by Cheapflights users on 9/21. 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 11/26:00 am -
1 stop18h 30m
Fri 11/137:25 pm -
1 stop17h 17m
Deal found 9/21![Delta logo]()
$1,196
This Justfly.com deal was found by Cheapflights users on 9/24. 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.
Mon 11/97:26 am -
2 stops23h 39m
Wed 11/258:15 am -
2 stops23h 29m
Deal found 9/24![Japan Airlines logo]()
$1,590
This Delta deal was found by Cheapflights users on 9/24. 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.
Fri 10/2310:14 am -
1 stop28h 01m
Fri 10/305:40 pm -
1 stop20h 14m
Deal found 9/24![Delta logo]()
$1,196
This Japan Airlines deal was found by Cheapflights users on 9/23. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/28:10 am -
2 stops22h 55m
Wed 12/168:15 am -
2 stops26h 07m
Deal found 9/23![Multiple Airlines logo]()
$1,434
This Delta deal was found by Cheapflights users on 9/24. 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 10/56:15 am -
1 stop21h 05m
Wed 11/49:35 am -
2 stops23h 37m
Deal found 9/24![Delta logo]()
$1,200
This FlightHub deal was found by Cheapflights users on 9/22. 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.
Thu 10/226:32 am -
2 stops24h 43m
Thu 10/298:15 am -
2 stops22h 38m
Deal found 9/22![Japan Airlines logo]()
$1,609
This Delta deal was found by Cheapflights users on 9/20. 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.
Wed 10/216:21 am -
2 stops20h 29m
Fri 10/309:35 am -
1 stop25h 16m
Deal found 9/20![Delta logo]()
$1,200
This Japan Airlines deal was found by Cheapflights users on 9/22. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:31 am -
2 stops19h 44m
Tue 10/278:15 am -
2 stops24h 01m
Deal found 9/22![Multiple Airlines logo]()
$1,470
This Japan Airlines deal was found by Cheapflights users on 9/23. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/111:14 am -
2 stops19h 51m
Tue 12/158:15 am -
2 stops26h 07m
Deal found 9/23![Multiple Airlines logo]()
$1,470
This Japan Airlines deal was found by Cheapflights users on 9/20. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:32 am -
2 stops24h 43m
Mon 10/268:15 am -
2 stops22h 38m
Deal found 9/20![Japan Airlines logo]()
$1,898
This Japan Airlines deal was found by Cheapflights users on 9/24. 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.
Tue 11/107:26 am -
2 stops23h 39m
Wed 11/258:15 am -
2 stops26h 35m
Deal found 9/24![Multiple Airlines logo]()
$1,488
This Japan Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/146:32 am -
2 stops24h 43m
Thu 10/228:00 am -
2 stops26h 57m
Deal found 9/24![Multiple Airlines logo]()
$1,736
Last-minute flights from St. Louis to SeoulDiscover last-minute flight deals from St. Louis to Seoul. Data last updated September 25, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Seoul. Data last updated September 25, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/24. 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 10/56:15 am -
1 stop21h 05m
Mon 10/194:25 pm -
1 stop18h 58m
Deal found 9/24![Delta logo]()
$1,096
This Cathay Pacific deal was found by Cheapflights users on 9/23. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:04 am -
2 stops47h 01m
Tue 10/271:55 am -
2 stops35h 51m
Deal found 9/23![Multiple Airlines logo]()
$1,135
This Cathay Pacific deal was found by Cheapflights users on 9/24. 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 10/146:04 am -
2 stops42h 01m
Thu 10/228:00 am -
2 stops30h 19m
Deal found 9/24![Multiple Airlines logo]()
$1,136
This FlightHub deal was found by Cheapflights users on 9/24. 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 10/1412:10 pm -
2 stops39h 20m
Thu 10/227:05 pm -
1 stop32h 55m
Deal found 9/24![Air Canada logo]()
$1,183
This Cathay Pacific deal was found by Cheapflights users on 9/23. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:04 am -
2 stops28h 21m
Sun 10/257:35 pm -
2 stops42h 24m
Deal found 9/23![Multiple Airlines logo]()
$1,185
This Gurufare deal was found by Cheapflights users on 9/22. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/207:10 pm -
2 stops39h 15m
Tue 10/277:35 pm -
2 stops39h 22m
Deal found 9/22![Cathay Pacific logo]()
$1,097
This Air Canada deal was found by Cheapflights users on 9/22. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:10 pm -
2 stops37h 55m
Tue 10/277:10 pm -
1 stop34h 13m
Deal found 9/22![Air Canada logo]()
$1,191
This Japan Airlines deal was found by Cheapflights users on 9/22. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:31 am -
2 stops19h 44m
Tue 10/278:15 am -
2 stops24h 01m
Deal found 9/22![Multiple Airlines logo]()
$1,470
This Cathay Pacific deal was found by Cheapflights users on 9/20. 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 10/211:06 pm -
2 stops33h 34m
Fri 10/307:35 pm -
2 stops42h 11m
Deal found 9/20![Multiple Airlines logo]()
$1,141
This Cathay Pacific deal was found by Cheapflights users on 9/25. 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 10/266:04 am -
2 stops28h 36m
Wed 11/257:35 pm -
2 stops35h 59m
Deal found 9/25![Multiple Airlines logo]()
$1,091
This Delta deal was found by Cheapflights users on 9/25. 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 10/266:00 am -
2 stops20h 50m
Wed 11/257:25 pm -
1 stop19h 31m
Deal found 9/25![Delta logo]()
$1,100
This Air Canada deal was found by Cheapflights users on 9/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:05 pm -
2 stops34h 05m
Wed 11/258:10 pm -
1 stop34h 16m
Deal found 9/23![Air Canada logo]()
$1,169
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 September 25, 2026.
Search for one-way flight options from St. Louis to Seoul. Find affordable one-way fares based on user searches. Data last updated September 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 12/57:54 pm -
3 stops58h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$455
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 12/47:58 pm -
2 stops34h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$462
This Kiwi.com deal was found by Cheapflights users on 9/24. 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.
Sun 12/62:47 pm -
3 stops39h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$565
This Kiwi.com deal was found by Cheapflights users on 9/25. 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.
Sun 11/226:13 am -
2 stops32h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Multiple Airlines logo]()
$570
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 11/213:04 pm -
2 stops39h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Multiple Airlines logo]()
$638
This Delta deal was found by Cheapflights users on 9/20. 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.
Sat 11/216:40 am -
1 stop19h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Delta logo]()
$647
This Kiwi.com deal was found by Cheapflights users on 9/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:54 pm -
3 stops42h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Multiple Airlines logo]()
$783
This FlightHub deal was found by Cheapflights users on 9/21. 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.
Thu 12/246:04 am -
2 stops25h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Japan Airlines logo]()
$1,048
This Kiwi.com deal was found by Cheapflights users on 9/24. 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 12/234:32 pm -
3 stops38h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Multiple Airlines logo]()
$1,075
This Kiwi.com deal was found by Cheapflights users on 9/21. 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.
Thu 12/246:04 am -
3 stops25h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Multiple Airlines logo]()
$1,147
This Gurufare deal was found by Cheapflights users on 9/21. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/239:20 am -
2 stops42h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Japan Airlines logo]()
$1,150
This Ovago deal was found by Cheapflights users on 9/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:00 am -
2 stops37h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![Japan Airlines logo]()
$1,174
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 September 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,091 (Cathay Pacific) |
One-way from | $455 (Kiwi.com) |
Popular in | December |
Cheapest in | February |
Average price | $1,205 |
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 7,457,451 searches. Data last updated September 25, 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. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Fri 12/4
7:58 pm-9:20 pm
2 stops34h 22m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$462
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Sat 12/5
7:54 pm-4:20 pm
2 stops29h 26m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$638
Quickest round-trip
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Sat 11/21
6:40 am-4:50 pm
1 stop19h 10m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$647
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Wed 12/23
6:58 pm-4:25 pm
2 stops30h 27m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$802
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Wed 12/23
7:15 pm-3:30 pm
1 stop29h 15m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$802
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Sun 12/6
6:04 am-5:35 pm
1 stop20h 31m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$852
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Thu 12/24
5:08 pm-4:25 pm
2 stops32h 17m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$852
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Thu 12/24
4:49 pm-3:50 pm
2 stops32h 01m
Incheon Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$858
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Thu 12/24
6:00 am-10:05 pm
2 stops25h 05m
Seoul Gimpo Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$1,048
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Wed 12/23
4:32 pm-10:30 pm
3 stops38h 58m
Seoul Gimpo Intl
Wed 12/31
12:00 am-9:00 am
Nonstop0h 00m
$1,075
Showing 1-10 of 32 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 September.
| 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 Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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, February is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $865). Flying from St. Louis to Seoul in July is currently the most expensive (average of $1,536). 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?
Airfare is typical for this route at the moment.
St. Louis to Seoul flights typically cost between $890 and $1,360 in October.The cheapest round-trip price found within the last 5 days was $1,091 on Multiple Airlines (Oct 26-Nov 25).
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 September 25, 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.
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Comfort
8.3
Entertainment
8.2
Boarding
8.5
Food
8.1
Overall
8.4
Crew
8.7
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 September 25, 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 September 25, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seoul
Explore flights to Seoul departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 25, 2026.
Top 5 airlines flying from St. Louis to Seoul
Discover the top 5 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 7,457,451 searches. Data last updated September 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$846 | Average$1,755 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$846 | Average$1,161 | 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% | |
| Cheapest$1,083 | Average$1,287 | FlexibilityNo cancel fee | On-time67% |