$506+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Sep 10 — Sep 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 August 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 August 11, 2026.
This Trip.com deal was found by Cheapflights users on 8/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:17 pm -
2 stops26h 13m
Fri 9/181:00 pm -
2 stops36h 32m
Deal found 8/6![Multiple Airlines logo]()
$1,079
This Delta deal was found by Cheapflights users on 8/10. 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.
Mon 10/52:30 pm -
1 stop23h 30m
Wed 11/49:35 am -
1 stop26h 16m
Deal found 8/10![Delta logo]()
$1,107
This Delta deal was found by Cheapflights users on 8/10. 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.
Mon 10/267:45 am -
2 stops20h 05m
Wed 11/259:35 am -
2 stops23h 38m
Deal found 8/10![Delta logo]()
$1,112
This Booking.com deal was found by Cheapflights users on 8/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:02 pm -
1 stop36h 28m
Sat 9/127:35 pm -
1 stop37h 03m
Deal found 8/10![Alaska Airlines logo]()
$1,148
This Delta deal was found by Cheapflights users on 8/7. 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.
Wed 9/168:46 am -
1 stop18h 34m
Fri 9/257:40 pm -
1 stop17h 36m
Deal found 8/7![Delta logo]()
$1,157
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:36 pm -
2 stops24h 44m
Fri 9/2511:30 am -
2 stops23h 51m
Deal found 8/7![United Airlines logo]()
$1,162
This Air Canada deal was found by Cheapflights users on 8/10. 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 10/52:40 pm -
2 stops35h 25m
Wed 11/46:55 pm -
2 stops35h 31m
Deal found 8/10![Air Canada logo]()
$1,169
This Trip.com deal was found by Cheapflights users on 8/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:20 am -
3 stops36h 10m
Tue 9/151:30 pm -
3 stops37h 40m
Deal found 8/10![Multiple Airlines logo]()
$1,190
This Booking.com deal was found by Cheapflights users on 8/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:29 am -
1 stop21h 01m
Fri 9/187:35 pm -
1 stop18h 24m
Deal found 8/6![Alaska Airlines logo]()
$1,198
This Delta deal was found by Cheapflights users on 8/6. 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 9/61:04 pm -
1 stop24h 56m
Sun 9/136:50 pm -
1 stop18h 52m
Deal found 8/6![Delta logo]()
$1,207
This Air Canada deal was found by Cheapflights users on 8/9. 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.
Sun 9/62:40 pm -
2 stops35h 25m
Sun 9/136:00 pm -
2 stops34h 00m
Deal found 8/9![Air Canada logo]()
$1,210
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Sun 9/66:59 pm -
2 stops19h 21m
Sun 9/135:15 pm -
2 stops32h 47m
Deal found 8/9![United Airlines logo]()
$1,212
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 August 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 August 11, 2026.
This Delta deal was found by Cheapflights users on 8/9. 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.
Mon 10/266:47 am -
1 stop20h 03m
Wed 11/259:35 am -
1 stop18h 48m
Deal found 8/9![Delta logo]()
$1,107
This United Airlines deal was found by Cheapflights users on 8/6. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:10 am -
2 stops19h 50m
Tue 10/1311:30 am -
1 stop21h 13m
Deal found 8/6![United Airlines logo]()
$1,107
This Travelocity deal was found by Cheapflights users on 8/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am -
2 stops25h 15m
Sat 9/128:00 am -
2 stops22h 48m
Deal found 8/10![Japan Airlines logo]()
$1,384
This Expedia deal was found by Cheapflights users on 8/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:31 am -
2 stops19h 44m
Tue 10/137:40 am -
2 stops26h 20m
Deal found 8/6![Multiple Airlines logo]()
$1,574
This Delta deal was found by Cheapflights users on 8/6. 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 10/67:20 pm -
1 stop18h 40m
Tue 10/134:25 pm -
1 stop21h 29m
Deal found 8/6![Delta logo]()
$1,107
This United Airlines deal was found by Cheapflights users on 8/8. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/311:00 am -
2 stops27h 40m
Tue 12/86:30 pm -
1 stop19h 55m
Deal found 8/8![United Airlines logo]()
$1,112
This Delta deal was found by Cheapflights users on 8/7. 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.
Mon 10/52:30 pm -
1 stop23h 30m
Wed 11/49:35 am -
1 stop26h 16m
Deal found 8/7![Delta logo]()
$1,107
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Mon 10/57:08 am -
1 stop17h 52m
Wed 11/412:45 pm -
2 stops24h 39m
Deal found 8/9![United Airlines logo]()
$1,112
This Expedia deal was found by Cheapflights users on 8/6. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:00 am -
2 stops25h 15m
Sun 9/1312:05 pm -
2 stops25h 25m
Deal found 8/6![Japan Airlines logo]()
$1,468
This Ovago deal was found by Cheapflights users on 8/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:01 am -
2 stops20h 14m
Tue 9/1512:05 pm -
2 stops25h 25m
Deal found 8/10![Japan Airlines logo]()
$1,650
This Japan Airlines deal was found by Cheapflights users on 8/6. 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.
Fri 9/118:30 am -
2 stops22h 45m
Fri 9/188:00 am -
2 stops22h 48m
Deal found 8/6![Multiple Airlines logo]()
$1,835
This Japan Airlines deal was found by Cheapflights users on 8/10. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/106:00 am -
2 stops25h 15m
Mon 9/147:15 pm -
2 stops42h 15m
Deal found 8/10![Japan Airlines logo]()
$1,670
This Japan Airlines deal was found by Cheapflights users on 8/8. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:32 am -
2 stops24h 43m
Sun 10/2512:05 pm -
2 stops25h 41m
Deal found 8/8![Japan Airlines logo]()
$1,886
This KAYAK deal was found by Cheapflights users on 8/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/157:29 am -
2 stops36h 26m
Sat 12/198:00 am -
2 stops17h 56m
Deal found 8/7![Japan Airlines logo]()
$2,053
This oojo deal was found by Cheapflights users on 8/11. 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.
Wed 10/216:04 am -
2 stops25h 11m
Tue 11/178:00 am -
2 stops30h 45m
Deal found 8/11![Japan Airlines logo]()
$2,142
Last-minute flights from St. Louis to SeoulDiscover last-minute flight deals from St. Louis to Seoul. Data last updated August 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Seoul. Data last updated August 11, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 8/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:02 pm -
1 stop36h 28m
Sat 9/127:35 pm -
1 stop37h 03m
Deal found 8/10![Alaska Airlines logo]()
$1,148
This Travelocity deal was found by Cheapflights users on 8/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am -
2 stops25h 15m
Sat 9/128:00 am -
2 stops22h 48m
Deal found 8/10![Japan Airlines logo]()
$1,384
This Delta deal was found by Cheapflights users on 8/6. 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 9/61:04 pm -
1 stop24h 56m
Sun 9/136:50 pm -
1 stop18h 52m
Deal found 8/6![Delta logo]()
$1,207
This Air Canada deal was found by Cheapflights users on 8/9. 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.
Sun 9/62:40 pm -
2 stops35h 25m
Sun 9/136:00 pm -
2 stops34h 00m
Deal found 8/9![Air Canada logo]()
$1,210
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Sun 9/66:59 pm -
2 stops19h 21m
Sun 9/135:15 pm -
2 stops32h 47m
Deal found 8/9![United Airlines logo]()
$1,212
This Air Canada deal was found by Cheapflights users on 8/10. 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.
Thu 9/108:55 am -
1 stop18h 35m
Tue 9/155:45 pm -
2 stops34h 15m
Deal found 8/10![Air Canada logo]()
$1,169
This Trip.com deal was found by Cheapflights users on 8/10. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1010:20 am -
3 stops36h 10m
Tue 9/151:30 pm -
3 stops37h 40m
Deal found 8/10![Multiple Airlines logo]()
$1,190
This Trip.com deal was found by Cheapflights users on 8/6. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:17 pm -
2 stops26h 13m
Fri 9/181:00 pm -
2 stops36h 32m
Deal found 8/6![Multiple Airlines logo]()
$1,079
This Booking.com deal was found by Cheapflights users on 8/6. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:29 am -
1 stop21h 01m
Fri 9/187:35 pm -
1 stop18h 24m
Deal found 8/6![Alaska Airlines logo]()
$1,198
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/154:40 pm -
2 stops21h 40m
Tue 11/176:30 pm -
1 stop18h 22m
Deal found 8/7![United Airlines logo]()
$1,107
This Delta deal was found by Cheapflights users on 8/7. 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.
Wed 9/168:46 am -
1 stop18h 34m
Fri 9/257:40 pm -
1 stop17h 36m
Deal found 8/7![Delta logo]()
$1,157
This United Airlines deal was found by Cheapflights users on 8/7. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/161:36 pm -
2 stops24h 44m
Fri 9/2511:30 am -
2 stops23h 51m
Deal found 8/7![United Airlines logo]()
$1,162
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 August 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 August 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/56:45 pm -
3 stops58h 00m
Deal found 8/7![Multiple Airlines logo]()
$506
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/55:34 pm -
2 stops59h 11m
Deal found 8/7![WestJet logo]()
$553
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Fri 8/216:17 pm -
2 stops58h 28m
Deal found 8/7![Multiple Airlines logo]()
$578
This Air Canada deal was found by Cheapflights users on 8/6. 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.
Fri 8/1412:10 pm -
1 stop38h 15m
Deal found 8/6![Air Canada logo]()
$586
This Air Canada deal was found by Cheapflights users on 8/7. 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.
Fri 8/212:40 pm -
1 stop36h 50m
Deal found 8/7![Air Canada logo]()
$591
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Fri 8/148:08 pm -
2 stops34h 02m
Deal found 8/6![Multiple Airlines logo]()
$602
This Air Canada deal was found by Cheapflights users on 8/7. 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.
Sun 9/2712:10 pm -
2 stops37h 55m
Deal found 8/7![Air Canada logo]()
$640
This Delta deal was found by Cheapflights users on 8/7. 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.
Sat 9/511:13 am -
1 stop16h 07m
Deal found 8/7![Delta logo]()
$647
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/275:19 pm -
3 stops56h 16m
Deal found 8/7![Multiple Airlines logo]()
$677
This Kiwi.com deal was found by Cheapflights users on 8/7. 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 9/56:08 pm -
3 stops38h 17m
Deal found 8/7![Multiple Airlines logo]()
$710
This Kiwi.com deal was found by Cheapflights users on 8/7. 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.
Sun 9/277:36 pm -
3 stops54h 29m
Deal found 8/7![Multiple Airlines logo]()
$720
This FlightHub deal was found by Cheapflights users on 8/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/56:00 am -
2 stops25h 15m
Deal found 8/7![Japan Airlines logo]()
$847
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 August 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $1,023 (Air Canada) |
One-way from | $506 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $1,420 |
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 August 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
Quickest round-trip
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Mon 10/26
6:47 am-4:50 pm
1 stop20h 03m
Incheon Intl
Wed 11/25
9:35 am-1:23 pm
1 stop18h 48m
$1,107
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Tue 10/6
5:10 am-3:00 pm
2 stops19h 50m
Incheon Intl
Tue 10/13
11:30 am-6:43 pm
1 stop21h 13m
$1,107
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Tue 10/6
7:20 pm-4:00 am
1 stop18h 40m
Incheon Intl
Tue 10/13
4:25 pm-11:54 pm
1 stop21h 29m
$1,107
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Mon 10/5
2:30 pm-4:00 am
1 stop23h 30m
Incheon Intl
Wed 11/4
9:35 am-8:51 pm
1 stop26h 16m
$1,107
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Tue 11/3
11:00 am-5:40 am
2 stops27h 40m
Incheon Intl
Tue 12/8
6:30 pm-11:25 pm
1 stop19h 55m
$1,112
St. LouisIncheon
STL Lambert-St Louis - ICN Incheon Intl
STLICN
Lambert-St Louis
Mon 10/5
7:08 am-3:00 pm
1 stop17h 52m
Incheon Intl
Wed 11/4
12:45 pm-10:24 pm
2 stops24h 39m
$1,112
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Tue 9/1
6:00 am-9:15 pm
2 stops25h 15m
Seoul Gimpo Intl
Sat 9/12
8:00 am-4:48 pm
2 stops22h 48m
$1,384
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Sun 9/6
6:00 am-9:15 pm
2 stops25h 15m
Seoul Gimpo Intl
Sun 9/13
12:05 pm-11:30 pm
2 stops25h 25m
$1,468
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Tue 10/6
11:31 am-9:15 pm
2 stops19h 44m
Seoul Gimpo Intl
Tue 10/13
7:40 am-8:00 pm
2 stops26h 20m
$1,574
St. LouisSeoul
STL Lambert-St Louis - GMP Seoul Gimpo Intl
STLGMP
Lambert-St Louis
Thu 9/10
11:01 am-9:15 pm
2 stops20h 14m
Seoul Gimpo Intl
Tue 9/15
12:05 pm-11:30 pm
2 stops25h 25m
$1,650
Showing 1-10 of 27 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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-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.
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 August 11, 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
Food
8.1
Boarding
8.5
Overall
8.4
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Food
8.1
Boarding
8.5
Overall
8.4
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Food
8.1
Boarding
8.5
Overall
8.4
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Food
8.1
Boarding
8.5
Overall
8.4
Comfort
8.3
Reviews
1 / 20
10.0
ExcellentChris,Mar 2025
SEA - ICN
Entertainment
8.2
Crew
8.7
Food
8.1
Boarding
8.5
Overall
8.4
Comfort
8.3
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.
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 August 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 August 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 August 11, 2026.
Top 4 airlines flying from St. Louis to Seoul
Discover the top 4 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 August 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$846 | Average$1,079 | 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% |