$563+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Jun 10 — Jun 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from St. Louis to 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
Cheapest
Best
Last-minute
One-way
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 May 11, 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 May 11, 2026.
This Air Canada deal was found by Cheapflights users on 5/6. 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 5/131:05 pm
STL
- ICN
2 stops37h 00m
Air Canada
Tue 6/166:00 pm
ICN
- STL
1 stop40h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,120
This Justfly.com deal was found by Cheapflights users on 5/6. 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 11/84:15 pm
STL
- ICN
1 stop35h 10m
Air Canada
Thu 11/126:55 pm
ICN
- STL
2 stops35h 35m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,155
This FlightHub deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub 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
Thu 8/205:45 pm
ICN
- STL
2 stops38h 57m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,261
This FlightHub deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Wed 8/197:05 pm
ICN
- STL
1 stop39h 02m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,266
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK 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
Asiana Airlines
Tue 8/187:05 pm
ICN
- STL
1 stop32h 57m
Asiana Airlines
Deal found 5/10![Asiana Airlines logo]()
$1,269
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/42:40 pm
STL
- ICN
1 stop36h 50m
Asiana Airlines
Wed 8/197:05 pm
ICN
- STL
1 stop32h 57m
Asiana Airlines
Deal found 5/10![Asiana Airlines logo]()
$1,273
This Air Canada deal was found by Cheapflights users on 5/9. 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 8/2412:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Mon 11/168:10 pm
ICN
- STL
1 stop34h 20m
Air Canada
Deal found 5/9![Air Canada logo]()
$1,288
This Air Canada deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/912:10 pm
STL
- ICN
1 stop38h 15m
Air Canada
Sat 8/157:05 pm
ICN
- STL
1 stop39h 02m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,298
This FlightHub deal was found by Cheapflights users on 5/6. 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.
Sat 10/1712:10 pm
STL
- ICN
2 stops61h 55m
Air Canada
Sun 11/16:55 pm
ICN
- STL
2 stops35h 35m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,300
This Air Canada deal was found by Cheapflights users on 5/6. 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 6/92:15 pm
STL
- ICN
2 stops35h 50m
Air Canada
Tue 6/166:00 pm
ICN
- STL
1 stop40h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,304
This Japan Airlines deal was found by Cheapflights users on 5/7. 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 8/199:31 am
STL
- GMP
2 stops21h 44m
Multiple Airlines
Wed 9/28:00 am
GMP
- STL
2 stops22h 24m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,457
This Japan Airlines deal was found by Cheapflights users on 5/6. 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.
Mon 9/79:31 am
STL
- GMP
2 stops42h 24m
Japan Airlines
Fri 9/118:00 am
GMP
- STL
2 stops20h 25m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$1,564
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 May 11, 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 May 11, 2026.
This Cathay Pacific deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/186:02 am
STL
- ICN
2 stops28h 23m
Multiple Airlines
Mon 8/318:00 am
ICN
- STL
2 stops29h 42m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,396
This Delta deal was found by Cheapflights users on 5/6. 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 10/177:05 pm
STL
- ICN
1 stop29h 05m
Delta
Sun 11/19:35 am
ICN
- STL
2 stops21h 23m
Delta
Deal found 5/6![Delta logo]()
$1,425
This Air Canada deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Fri 10/307:10 pm
ICN
- STL
1 stop34h 20m
Air Canada
Deal found 5/10![Air Canada logo]()
$1,436
This United Airlines deal was found by Cheapflights users on 5/9. 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 7/307:23 pm
STL
- ICN
1 stop18h 57m
United Airlines
Tue 8/184:50 pm
ICN
- STL
2 stops33h 50m
United Airlines
Deal found 5/9![United Airlines logo]()
$1,461
This Alaska Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/267:56 pm
STL
- ICN
1 stop31h 34m
Alaska Airlines
Wed 8/197:35 pm
ICN
- STL
1 stop32h 29m
Alaska Airlines
Deal found 5/8![Alaska Airlines logo]()
$1,556
This Japan Airlines deal was found by Cheapflights users on 5/6. 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.
Mon 9/79:31 am
STL
- GMP
2 stops42h 24m
Japan Airlines
Fri 9/118:00 am
GMP
- STL
2 stops20h 25m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$1,564
This Delta deal was found by Cheapflights users on 5/6. 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 7/269:24 am
STL
- ICN
1 stop28h 36m
Delta
Wed 8/197:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 5/6![Delta logo]()
$1,439
This Japan Airlines deal was found by Cheapflights users on 5/7. 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 8/199:31 am
STL
- GMP
2 stops21h 44m
Multiple Airlines
Wed 9/28:00 am
GMP
- STL
2 stops22h 24m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$1,457
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:23 pm
STL
- ICN
1 stop29h 37m
United Airlines
Sun 8/2311:30 am
ICN
- STL
1 stop21h 09m
United Airlines
Deal found 5/10![United Airlines logo]()
$1,518
This Japan Airlines deal was found by Cheapflights users on 5/7. 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 9/109:46 am
STL
- GMP
2 stops42h 09m
Japan Airlines
Mon 9/1412:05 pm
GMP
- STL
2 stops40h 20m
Japan Airlines
Deal found 5/7![Japan Airlines logo]()
$1,571
This Delta deal was found by Cheapflights users on 5/9. 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
Mon 8/177:00 pm
ICN
- STL
2 stops27h 37m
Delta
Deal found 5/9![Delta logo]()
$1,443
This Delta deal was found by Cheapflights users on 5/7. 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 10/166:00 am
STL
- ICN
2 stops21h 20m
Delta
Sun 10/257:25 pm
ICN
- STL
1 stop18h 14m
Delta
Deal found 5/7![Delta logo]()
$1,473
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:20 am
STL
- ICN
1 stop21h 00m
Delta
Mon 8/177:00 pm
ICN
- STL
2 stops29h 23m
Delta
Deal found 5/10![Delta logo]()
$1,491
This FlightHub deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:56 pm
STL
- GMP
2 stops32h 14m
Multiple Airlines
Sat 8/151:50 pm
GMP
- STL
2 stops38h 02m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$1,863
This KAYAK deal was found by Cheapflights users on 5/9. 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.
Thu 10/2910:14 am
STL
- GMP
2 stops21h 51m
Japan Airlines
Sat 11/78:00 am
GMP
- STL
2 stops22h 29m
Japan Airlines
Deal found 5/9![Japan Airlines logo]()
$1,971
This Delta deal was found by Cheapflights users on 5/6. 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 7/2811:18 am
STL
- ICN
1 stop16h 02m
Delta
Thu 8/207:20 pm
ICN
- STL
1 stop19h 21m
Delta
Deal found 5/6![Delta logo]()
$1,566
This KAYAK deal was found by Cheapflights users on 5/9. 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 7/268:36 am
STL
- GMP
2 stops22h 39m
Japan Airlines
Wed 8/128:00 am
GMP
- STL
2 stops24h 10m
Japan Airlines
Deal found 5/9![Japan Airlines logo]()
$2,032
This Japan Airlines deal was found by Cheapflights users on 5/6. 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 10/298:30 am
STL
- GMP
2 stops23h 35m
Multiple Airlines
Sat 11/78:00 am
GMP
- STL
2 stops19h 37m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$2,061
This Ovago deal was found by Cheapflights users on 5/6. 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 6/96:35 am
STL
- GMP
2 stops24h 40m
Japan Airlines
Tue 6/168:00 am
GMP
- STL
2 stops29h 56m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$2,123
Last-minute flights from St. Louis to SeoulDiscover last-minute flight deals from St. Louis to Seoul. Data last updated May 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Seoul. Data last updated May 11, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/111:05 pm
STL
- ICN
2 stops37h 00m
Asiana Airlines
Tue 6/235:45 pm
ICN
- STL
2 stops32h 36m
Asiana Airlines
Deal found 5/10![Asiana Airlines logo]()
$1,446
This FlightHub deal was found by Cheapflights users on 5/9. 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 5/111:05 pm
STL
- ICN
2 stops37h 00m
Air Canada
Tue 6/236:00 pm
ICN
- STL
2 stops32h 21m
Air Canada
Deal found 5/9![Air Canada logo]()
$1,454
This Air Canada deal was found by Cheapflights users on 5/6. 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 5/131:05 pm
STL
- ICN
2 stops37h 00m
Air Canada
Tue 6/166:00 pm
ICN
- STL
1 stop40h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,120
This FlightHub deal was found by Cheapflights users on 5/6. 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 5/136:21 am
STL
- GMP
2 stops24h 54m
Japan Airlines
Tue 6/168:00 am
GMP
- STL
2 stops29h 56m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$1,976
This Air Canada deal was found by Cheapflights users on 5/6. 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 5/187:05 am
STL
- ICN
1 stop20h 25m
Air Canada
Sun 6/76:00 pm
ICN
- STL
1 stop40h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,353
This FlightHub deal was found by Cheapflights users on 5/6. 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.
Sat 6/68:40 am
STL
- ICN
2 stops38h 00m
Multiple Airlines
Mon 6/155:45 pm
ICN
- STL
2 stops40h 40m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$1,369
This Air Canada deal was found by Cheapflights users on 5/6. 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.
Sun 6/72:15 pm
STL
- ICN
1 stop37h 15m
Air Canada
Mon 6/155:45 pm
ICN
- STL
2 stops32h 21m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,450
This Ovago deal was found by Cheapflights users on 5/6. 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.
Mon 6/86:35 am
STL
- GMP
2 stops24h 40m
Japan Airlines
Thu 6/118:00 am
GMP
- STL
2 stops29h 56m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$2,074
This Air Canada deal was found by Cheapflights users on 5/6. 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 6/92:15 pm
STL
- ICN
2 stops35h 50m
Air Canada
Tue 6/166:00 pm
ICN
- STL
1 stop40h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,304
This Ovago deal was found by Cheapflights users on 5/6. 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 6/96:35 am
STL
- GMP
2 stops24h 40m
Japan Airlines
Tue 6/168:00 am
GMP
- STL
2 stops29h 56m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$2,123
This Ovago deal was found by Cheapflights users on 5/7. 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 6/206:35 am
STL
- GMP
2 stops45h 20m
Japan Airlines
Mon 7/68:00 am
GMP
- STL
2 stops29h 59m
Japan Airlines
Deal found 5/7![Japan Airlines logo]()
$2,210
This FlightHub deal was found by Cheapflights users on 5/6. 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 6/212:15 pm
STL
- ICN
1 stop37h 15m
Air Canada
Tue 7/75:45 pm
ICN
- STL
2 stops34h 17m
Air Canada
Deal found 5/6![Air Canada logo]()
$1,389
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 May 11, 2026.
Search for one-way flight options from St. Louis to Seoul. Find affordable one-way fares based on user searches. Data last updated May 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:33 pm
STL
- ICN
3 stops52h 37m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$563
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/258:08 pm
STL
- ICN
3 stops49h 17m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$602
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 8/12:52 pm
STL
- ICN
3 stops54h 33m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$622
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/236:33 pm
STL
- ICN
3 stops50h 52m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$624
This Travelocity deal was found by Cheapflights users on 5/6. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/42:40 pm
STL
- ICN
2 stops35h 25m
Air Canada
Deal found 5/6![Air Canada logo]()
$630
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 7/158:08 pm
STL
- ICN
2 stops29h 42m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$631
This Air Canada deal was found by Cheapflights users on 5/7. 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
Deal found 5/7![Air Canada logo]()
$680
This Justfly.com deal was found by Cheapflights users on 5/7. 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 10/194:40 pm
STL
- GMP
2 stops36h 35m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$715
This oojo deal was found by Cheapflights users on 5/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:07 pm
STL
- GMP
2 stops35h 08m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$788
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 10/176:00 am
STL
- GMP
2 stops24h 10m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$797
This FlightHub deal was found by Cheapflights users on 5/6. 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 7/158:36 am
STL
- GMP
2 stops36h 04m
Japan Airlines
Deal found 5/6![Japan Airlines logo]()
$807
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 8/12:52 pm
STL
- GMP
3 stops41h 33m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$830
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 May 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,261 (FlightHub) |
One-way from | $563 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $1,011 |
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 May 11, 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 - ICN
STLICN
Lambert-St Louis
Tue 8/18
6:02 am-12:25 am
2 stops28h 23m
Incheon Intl
Mon 8/31
8:00 am-11:42 pm
2 stops29h 42m
$1,396
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sat 10/17
7:05 pm-2:10 pm
1 stop29h 05m
Incheon Intl
Sun 11/1
9:35 am-4:58 pm
2 stops21h 23m
$1,425
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Mon 10/26
4:15 pm-5:25 pm
1 stop35h 10m
Incheon Intl
Fri 10/30
7:10 pm-3:30 pm
1 stop34h 20m
$1,436
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 7/26
9:24 am-4:00 am
1 stop28h 36m
Incheon Intl
Wed 8/19
7:20 pm-12:41 am
1 stop19h 21m
$1,439
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Wed 7/29
6:21 am-4:50 pm
2 stops20h 29m
Incheon Intl
Mon 8/17
7:00 pm-8:37 am
2 stops27h 37m
$1,443
St. LouisSeoul
STL - GMP
STLGMP
Lambert-St Louis
Wed 8/19
9:31 am-9:15 pm
2 stops21h 44m
Seoul Gimpo Intl
Wed 9/2
8:00 am-4:24 pm
2 stops22h 24m
$1,457
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Thu 7/30
7:23 pm-4:20 am
1 stop18h 57m
Incheon Intl
Tue 8/18
4:50 pm-12:40 pm
2 stops33h 50m
$1,461
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Fri 10/16
6:00 am-5:20 pm
2 stops21h 20m
Incheon Intl
Sun 10/25
7:25 pm-11:39 pm
1 stop18h 14m
$1,473
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Fri 8/7
6:20 am-5:20 pm
1 stop21h 00m
Incheon Intl
Mon 8/17
7:00 pm-10:23 am
2 stops29h 23m
$1,491
St. LouisIncheon
STL - ICN
STLICN
Lambert-St Louis
Sun 8/2
7:23 pm-3:00 pm
1 stop29h 37m
Incheon Intl
Sun 8/23
11:30 am-6:39 pm
1 stop21h 09m
$1,518
Showing 1-10 of 37 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 May.
| 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
How far ahead should I book a flight from St. Louis to Seoul?
To ensure you get the cheapest price possible for a flight from St. Louis to Seoul, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from St. Louis to Seoul?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $512). Flying from St. Louis to Seoul in July is currently the most expensive (average of $1,111). 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 May 11, 2026.
Read reviews from past customers who have flown Delta,United Airlines, andAmerican 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
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Comfort
7.8
Entertainment
7.8
Crew
8.5
Food
7.2
Overall
7.9
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Seoul flight routes
Alternative routes for St. Louis to Seoul
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seoul by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Seoul by cabin class
Find flights from St. Louis to Seoul, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Seoul flights
Browse other St. Louis and Seoul flight options. Last updated on May 11, 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 May 11, 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 May 11, 2026.
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 May 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$832 | Average$1,556 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$846 | Average$978 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$865 | Average$1,181 | FlexibilityNo cancel fee | On-time69% |