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$555+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$882
(United Airlines)

One-way from

$555
(Kiwi.com)

Popular in

August

Cheapest in

December

Average price

$1,280
Provider with most accurate pricing for Lambert-St Louis-Seoul (SEL) flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Seoul (SEL) flights.
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From Lambert-St Louis to Seoul (SEL)
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One-way flight from Lambert-St Louis to Seoul (SEL)
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Highest demand for flights based on searches. 8% potential increase in price ($115 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/18. 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 3/207:00 amSTL - ICN
1 stop18h 15mUnited Airlines
Thu 3/275:00 pmICN - STL
2 stops30h 51mUnited Airlines
Deal found 2/18$882
This Delta deal was found by Cheapflights users on 2/18. 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 3/206:00 amSTL - ICN
1 stop19h 30mDelta
Thu 3/277:25 pmICN - STL
1 stop27h 49mDelta
Deal found 2/18$883
This Korean Air deal was found by Cheapflights users on 2/18. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:50 amSTL - ICN
1 stop19h 35mMultiple Airlines
Thu 5/86:40 pmICN - STL
1 stop16h 53mMultiple Airlines
Deal found 2/18$1,079
This Air Canada deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/11:30 pmSTL - ICN
1 stop36h 50mAir Canada
Wed 10/156:00 pmICN - STL
2 stops35h 16mAir Canada
Deal found 2/20$1,192
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Thu 4/245:26 amSTL - ICN
1 stop20h 04mAmerican Airlines
Sat 5/315:25 pmICN - STL
1 stop19h 22mAmerican Airlines
Deal found 2/19$1,328
This oojo deal was found by Cheapflights users on 2/19. 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.
Tue 2/256:10 amSTL - ICN
2 stops40h 45mCathay Pacific
Tue 3/1810:05 amICN - STL
2 stops27h 04mCathay Pacific
Deal found 2/19$1,452
This Gurufare deal was found by Cheapflights users on 2/19. 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.
Mon 9/299:50 amSTL - GMP
2 stops22h 00mJapan Airlines
Tue 10/77:55 amGMP - STL
2 stops19h 04mJapan Airlines
Deal found 2/19$1,477
This oojo deal was found by Cheapflights users on 2/18. 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.
Thu 3/206:44 amSTL - ICN
2 stops44h 31mQatar Airways
Wed 3/2612:20 amICN - STL
2 stops37h 39mQatar Airways
Deal found 2/18$1,552
This WestJet deal was found by Cheapflights users on 2/19. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/107:20 amSTL - ICN
2 stops45h 25mWestJet
Mon 6/28:45 pmICN - STL
2 stops35h 16mWestJet
Deal found 2/19$1,669
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Wed 7/309:15 amSTL - GMP
2 stops23h 05mMultiple Airlines
Thu 8/78:30 amGMP - STL
3 stops28h 15mMultiple Airlines
Deal found 2/19$2,266
This Flightnetwork deal was found by Cheapflights users on 2/19. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/201:03 pmSTL - GMP
2 stops31h 17mANA
Thu 2/277:45 amGMP - STL
2 stops24h 21mANA
Deal found 2/19$3,196

Find flights from St. Louis to Seoul within your budget

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 February 20, 2025.

Fly from

St. Louis

Fly to

Seoul

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/20

7:00 am-3:15 pm

1 stop18h 15m

Incheon Intl

Thu 3/27

5:00 pm-9:51 am

2 stops30h 51m

$882

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/20

6:00 am-3:30 pm

1 stop19h 30m

Incheon Intl

Thu 3/27

7:25 pm-9:14 am

1 stop27h 49m

$883

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/30

6:50 am-4:25 pm

1 stop19h 35m

Incheon Intl

Thu 5/8

6:40 pm-9:33 pm

1 stop16h 53m

$1,079

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 4/8

3:30 pm-5:30 pm

1 stop36h 00m

Incheon Intl

Tue 4/22

7:05 pm-2:49 pm

1 stop33h 44m

$1,199

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 4/24

5:26 am-3:30 pm

1 stop20h 04m

Incheon Intl

Sat 5/31

5:25 pm-10:47 pm

1 stop19h 22m

$1,328

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 4/30

6:15 am-9:50 pm

2 stops25h 35m

Seoul Gimpo Intl

Thu 5/8

7:55 am-1:07 pm

2 stops19h 12m

$1,517

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 3/20

6:44 am-5:15 pm

2 stops44h 31m

Incheon Intl

Wed 3/26

12:20 am-11:59 pm

2 stops37h 39m

$1,552

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 3/2

11:04 am-12:45 pm

2 stops34h 41m

Incheon Intl

Fri 3/7

10:05 am-11:03 pm

2 stops27h 58m

$1,556

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 5/10

7:20 am-6:45 pm

2 stops45h 25m

Incheon Intl

Thu 6/5

8:45 pm-8:33 pm

2 stops37h 48m

$1,669

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 7/30

9:15 am-10:20 pm

2 stops23h 05m

Seoul Gimpo Intl

Thu 8/7

8:30 am-10:45 pm

3 stops28h 15m

$2,266

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 14 results
1
2

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*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.

Travel insights for flights from St. Louis to Seoul

Get recent, data-driven insights about flights from St. Louis to Seoul including ideal travel times, pricing trends, and more.

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 $1,036). Flying from St. Louis to Seoul in June is currently the most expensive (average of $1,697). 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 February 20, 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.

Rainfall in Seoul by month

Plan your trip to Seoul by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.

Temperature in Seoul by month

Plan your trip to Seoul by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seoul, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 February 20, 2025.
Read through reviews of airlines operating flights from St. Louis to Seoul, such as Japan Airlines, Delta and Cathay Pacific. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Japan Airlines
8.3
Very good
1,440 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Delta
8.0
Very good
8,219 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Cathay Pacific
7.5
Good
820 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

Qatar Airways
7.4
Good
3,613 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

United Airlines
7.4
Good
8,765 reviews
Japan Airlines
8.3
Very good
1,440 reviews

Food

7.7

Boarding

8.4

Overall

8.3

Entertainment

7.8

Comfort

8.2

Crew

8.7

Reviews

1 / 20

10.0
Excellent

L,Nov 2024

SNA - SEA

Excellent crew, great food and decent audio selection. Seats are wide and have plenty of leg room but could use some more padding.

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. 6 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?

    United Airlines, at $882, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include Delta and Air Canada. These flights start at 28% 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 $1,036). Flying from St. Louis to Seoul in June is currently the most expensive (average of $1,697). 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 6 airlines flying from St. Louis to Seoul

Discover the top 6 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,030FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,683FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,112FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,518FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,882FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$1,269Average$1,488FlexibilityNo cancel feeOn-time79%
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