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$379+ 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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from St. Louis to Seoul

Cheapest flights from St. Louis to Seoul
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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/57:00 am
STL
-
ICN
1 stop20h 35m
Multiple Airlines
Sun 3/158:35 pm
ICN
-
STL
1 stop17h 24m
Multiple Airlines
Deal found 1/27$753
This Delta deal was found by Cheapflights users on 1/28. 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 4/167:02 am
STL
-
ICN
1 stop18h 18m
Delta
Wed 4/224:25 pm
ICN
-
STL
1 stop21h 09m
Delta
Deal found 1/28$847
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sat 5/24:15 pm
STL
-
ICN
2 stops22h 05m
United Airlines
Tue 5/1211:30 am
ICN
-
STL
1 stop20h 52m
United Airlines
Deal found 1/27$851
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sat 5/28:30 am
STL
-
ICN
1 stop40h 30m
United Airlines
Fri 5/154:50 pm
ICN
-
STL
1 stop26h 57m
United Airlines
Deal found 1/27$854
This United Airlines deal was found by Cheapflights users on 1/27. 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 5/38:30 am
STL
-
ICN
1 stop29h 50m
United Airlines
Fri 5/1511:30 am
ICN
-
STL
2 stops19h 27m
United Airlines
Deal found 1/27$859
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Sat 8/227:06 pm
STL
-
ICN
1 stop19h 14m
United Airlines
Tue 9/14:50 pm
ICN
-
STL
2 stops36h 31m
United Airlines
Deal found 1/27$860
This Alaska Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 8/217:32 pm
STL
-
ICN
1 stop31h 58m
Alaska Airlines
Wed 9/27:35 pm
ICN
-
STL
1 stop37h 02m
Alaska Airlines
Deal found 1/27$862
This United Airlines deal was found by Cheapflights users on 1/27. 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.
Fri 8/215:20 am
STL
-
ICN
2 stops19h 40m
United Airlines
Tue 9/14:50 pm
ICN
-
STL
2 stops36h 31m
United Airlines
Deal found 1/27$864
This Delta deal was found by Cheapflights users on 1/27. 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 5/56:20 am
STL
-
ICN
1 stop21h 00m
Delta
Sat 5/97:40 pm
ICN
-
STL
1 stop17h 21m
Delta
Deal found 1/27$867
This Delta deal was found by Cheapflights users on 1/27. 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 8/216:30 am
STL
-
ICN
2 stops20h 20m
Delta
Tue 9/17:20 pm
ICN
-
STL
1 stop19h 16m
Delta
Deal found 1/27$871
This KAYAK deal was found by Cheapflights users on 1/28. 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 4/168:30 am
STL
-
ICN
1 stop29h 50m
Asiana Airlines
Wed 4/2211:30 am
ICN
-
STL
2 stops19h 26m
Asiana Airlines
Deal found 1/28$879
This United Airlines deal was found by Cheapflights users on 1/27. 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 9/87:06 pm
STL
-
ICN
1 stop19h 14m
United Airlines
Tue 9/154:50 pm
ICN
-
STL
2 stops20h 53m
United Airlines
Deal found 1/27$901

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$753
(Kiwi.com)

One-way from

$379
(Kiwi.com)

Popular in

July

Cheapest in

October

Average price

$866
Provider with most accurate pricing for Lambert-St Louis-Seoul (SEL) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Seoul (SEL) flights.
Search Deals
From Lambert-St Louis to Seoul (SEL)
Search Deals
One-way flight from Lambert-St Louis to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($321 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
Use the filters below to find and compare flights from St. Louis to Seoul that are best for you.

Fly from

St. Louis

Fly to

Seoul

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/25

9:31 am-4:00 am

1 stop28h 29m

Incheon Intl

Wed 5/6

6:50 pm-8:07 am

1 stop27h 17m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/22

7:35 pm-11:59 pm

1 stop18h 24m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/16

6:48 am-4:25 pm

1 stop19h 37m

Incheon Intl

Wed 4/22

4:25 pm-11:34 pm

1 stop21h 09m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 4/19

4:41 pm-4:00 am

1 stop21h 19m

Incheon Intl

Tue 4/28

7:20 pm-12:25 am

1 stop19h 05m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 5/2

4:15 pm-4:20 am

2 stops22h 05m

Incheon Intl

Mon 5/11

4:50 pm-9:30 am

2 stops30h 40m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 5/2

4:15 pm-4:20 am

2 stops22h 05m

Incheon Intl

Thu 5/14

4:50 pm-8:18 am

2 stops29h 28m

$851

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:53 am-9:50 pm

2 stops22h 57m

Seoul Gimpo Intl

Wed 4/22

8:00 am-1:59 pm

2 stops19h 59m

$1,107

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 4/16

8:53 am-10:45 am

2 stops35h 52m

Seoul Gimpo Intl

Wed 4/22

7:55 am-10:14 pm

2 stops28h 19m

$1,172

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 4/19

6:20 am-9:50 pm

2 stops25h 30m

Seoul Gimpo Intl

Tue 4/28

7:55 am-1:59 pm

2 stops20h 04m

$1,268

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 5/28

6:36 am-9:50 pm

2 stops25h 14m

Seoul Gimpo Intl

Fri 6/12

7:20 pm-12:41 pm

2 stops31h 21m

$1,455

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 27 results
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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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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

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 $667). Flying from St. Louis to Seoul in July is currently the most expensive (average of $1,204). 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 January 29, 2026.
Read reviews from past customers who have flown Delta, United Airlines, and American 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.
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,127 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,215 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,206 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,667 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.8

Food

7.2

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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.

  • What airport do you fly from for flights from St. Louis to Seoul?

    For a flight from St. Louis to Seoul, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 outbound flights to Seoul per day. 4 airlines have flights to Seoul from Lambert-St Louis on a regular basis.

  • How long is the flight from St. Louis to Seoul?

    For as low as $847, Delta can have you in Seoul from St. Louis in 28h 29m. The distance from St. Louis to Seoul is about 6670 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from St. Louis to Seoul round-trip?

    Air Canada, at $799, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include American Airlines and Delta. These flights start at 25% lower than the current average price 3 months from now.

  • Can I find deals for flights from St. Louis to Seoul that include hotel bookings?

    Yes. In addition to deals on St. Louis to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Seoul?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Seoul.

  • Can I find deals for business class flights from St. Louis to Seoul?

    Yes. Cheapflights offers flight deals from St. Louis to Seoul by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $667). Flying from St. Louis to Seoul in July is currently the most expensive (average of $1,204). 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.

See more FAQs

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.

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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,098FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$846Average$1,846FlexibilityNo cancel feeOn-time71%
DeltaCheapest$846Average$1,056FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$870Average$1,571FlexibilityNo cancel feeOn-time69%

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