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$448+ 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 10/19. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
1 adult, Economy
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Cheap 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 July 30, 2025.

Round-trip from

$841
(American Airlines)

Popular in

August

Cheapest in

January

Average price

$1,420
From Lambert-St Louis to Seoul (SEL)
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Highest demand for flights based on searches. 14% potential increase in price ($213 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find 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 July 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:59 pmSTL - ICN
2 stops29h 31mAmerican Airlines
Sat 9/205:25 pmICN - STL
1 stop16h 50mAmerican Airlines
Deal found 7/28$841
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/105:29 pmSTL - ICN
1 stop21h 11mUnited Airlines
Thu 11/276:00 pmICN - STL
2 stops31h 51mUnited Airlines
Deal found 7/28$850
This Delta deal was found by Cheapflights users on 7/28. 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.
Sat 9/276:00 amSTL - ICN
2 stops20h 30mDelta
Sun 10/268:05 pmICN - STL
2 stops18h 19mDelta
Deal found 7/28$866
This Gurufare deal was found by Cheapflights users on 7/28. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/178:50 amSTL - GMP
2 stops35h 55mJapan Airlines
Sat 8/307:55 amGMP - STL
2 stops25h 26mJapan Airlines
Deal found 7/28$874
This Japan Airlines deal was found by Cheapflights users on 7/29. 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 8/257:59 pmSTL - GMP
2 stops24h 46mMultiple Airlines
Sat 8/307:55 amGMP - STL
2 stops21h 54mMultiple Airlines
Deal found 7/29$908
This Air Canada deal was found by Cheapflights users on 7/28. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/111:30 pmSTL - ICN
2 stops36h 35mAir Canada
Thu 9/185:45 pmICN - STL
2 stops35h 33mAir Canada
Deal found 7/28$1,029
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/181:30 pmSTL - ICN
2 stops36h 35mMultiple Airlines
Wed 9/246:00 pmICN - STL
3 stops30h 50mMultiple Airlines
Deal found 7/30$1,121
This Fareboom deal was found by Cheapflights users on 7/28. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:00 amSTL - ICN
1 stop20h 35mHawaiian Airlines
Sat 11/298:35 pmICN - STL
1 stop18h 19mHawaiian Airlines
Deal found 7/28$1,141
This Booking.com deal was found by Cheapflights users on 7/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:15 amSTL - GMP
2 stops25h 15mANA
Sat 11/297:50 pmGMP - STL
2 stops36h 49mANA
Deal found 7/28$2,349

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 July 30, 2025.
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

Mon 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

Sat 9/20

5:25 pm-8:15 pm

1 stop16h 50m

$841

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:49 pm-4:20 am

1 stop20h 31m

Incheon Intl

Tue 9/30

11:30 am-4:54 pm

1 stop19h 24m

$856

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/27

6:01 am-5:20 pm

2 stops21h 19m

Incheon Intl

Sun 10/26

7:30 pm-11:02 pm

1 stop17h 32m

$866

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 8/17

8:50 am-10:45 am

2 stops35h 55m

Seoul Gimpo Intl

Sat 8/30

7:55 am-7:21 pm

2 stops25h 26m

$874

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 8/25

7:59 pm-10:45 am

2 stops24h 46m

Seoul Gimpo Intl

Sat 8/30

7:55 am-3:49 pm

2 stops21h 54m

$908

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/11

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Thu 9/18

5:45 pm-3:18 pm

2 stops35h 33m

$1,029

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 9/18

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 9/24

6:00 pm-10:50 am

3 stops30h 50m

$1,121

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 8/25

6:30 pm-7:00 pm

3 stops34h 30m

Incheon Intl

Sat 8/30

9:25 pm-5:34 pm

2 stops34h 09m

$1,367

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 10/19

6:00 am-4:30 pm

2 stops20h 30m

$448

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sun 10/19

8:42 am-9:50 pm

2 stops23h 08m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 17 results
1
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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, February is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $998). Flying from St. Louis to Seoul in December is currently the most expensive (average of $1,635). 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.

What is the cheapest time of day to fly from STL to SEL?

Find hourly flight availability from St. Louis to Seoul. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 30, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 23% on flights from St. Louis to Seoul by exploring options for tickets at noon.

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 July 30, 2025.
Read reviews from past customers who have flown Japan Airlines, Alaska Airlines, and Delta 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.
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Japan Airlines
8.3
Very good
1,536 reviews
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Alaska Airlines
8.0
Very good
10,000 reviews
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
Delta
8.0
Very good
7,980 reviews
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
United Airlines
7.4
Good
8,896 reviews
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.
American Airlines
7.2
Good
10,000 reviews
Japan Airlines
8.3
Very good
1,536 reviews

Crew

8.7

Entertainment

7.8

Boarding

8.4

Food

7.7

Comfort

8.2

Overall

8.3

Reviews

1 / 20
2.0
Mediocre

Roger,Jun 2025

ORD - PIT

My bag was at O’Hare airport for five hours waiting on my next flight because it was delayed for 2 1/2 hours and they couldn’t put it on the right goddamn airplane. I am home in Pennsylvania without my bag and all my stuff.

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. 5 airlines have flights to Seoul from Lambert-St Louis on a regular basis.

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

    American Airlines, at $841, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include United Airlines and Delta. These flights start at 31% 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, February is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $998). Flying from St. Louis to Seoul in December is currently the most expensive (average of $1,635). 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

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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 2,558,603 searches. Data last updated July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,081FlexibilityNo cancel feeOn-time67%
DeltaCheapest$896Average$1,417FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,373FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$977Average$1,846FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,866FlexibilityNo cancel feeOn-time81%

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