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$582+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
avr. 5 — avr. 121
sam. 4/5
sam. 4/12
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 mars 31, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,196
(Priceline)

One-way from

$582
(Air Canada)

Popular in

July

Cheapest in

December

Average price

$1,236
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)
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($219 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in March 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 mars 31, 2025.

This Priceline deal was found by Cheapflights users on 3/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/251:30 pmSTL - ICN
2 stops36h 35mAir Canada
jeu. 10/305:50 pmICN - STL
2 stops35h 36mAir Canada
Deal found 3/30$1,196
This EVA Air deal was found by Cheapflights users on 3/31. 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 EVA Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 9/257:36 pmSTL - ICN
2 stops25h 24mMultiple Airlines
jeu. 10/3011:40 amICN - STL
2 stops40h 12mMultiple Airlines
Deal found 3/31$1,298
This Gurufare deal was found by Cheapflights users on 3/30. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/2111:32 amSTL - ICN
2 stops41h 13mWestJet
mar. 5/278:45 pmICN - STL
2 stops26h 15mWestJet
Deal found 3/30$1,340
This Delta deal was found by Cheapflights users on 3/31. 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.
jeu. 4/247:01 pmSTL - ICN
1 stop18h 59mDelta
sam. 5/316:40 pmICN - STL
1 stop18h 46mDelta
Deal found 3/31$1,469
This Gurufare deal was found by Cheapflights users on 3/31. 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.
jeu. 9/257:00 amSTL - GMP
2 stops24h 50mJapan Airlines
jeu. 10/307:50 amGMP - STL
2 stops19h 09mJapan Airlines
Deal found 3/31$1,601
This oojo deal was found by Cheapflights users on 3/31. 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.
sam. 9/67:59 pmSTL - ICN
2 stops31h 06mQatar Airways
ven. 9/121:20 amICN - STL
2 stops50h 43mQatar Airways
Deal found 3/31$1,668
This United Airlines deal was found by Cheapflights users on 3/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/144:45 pmSTL - ICN
2 stops21h 35mUnited Airlines
mar. 8/511:30 amICN - STL
2 stops23h 06mUnited Airlines
Deal found 3/30$1,773
This KAYAK deal was found by Cheapflights users on 3/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 5/1610:36 amSTL - ICN
2 stops34h 44mFinnair
ven. 8/89:50 pmICN - STL
2 stops37h 59mFinnair
Deal found 3/30$1,849
This Mytrip deal was found by Cheapflights users on 3/31. 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.
ven. 6/207:30 amSTL - GMP
2 stops24h 55mMultiple Airlines
dim. 7/2712:05 pmGMP - STL
2 stops49h 15mMultiple Airlines
Deal found 3/31$2,185
This KAYAK deal was found by Cheapflights users on 3/31. 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.
jeu. 6/268:00 amSTL - GMP
2 stops24h 20mANA
ven. 8/87:55 pmGMP - STL
2 stops30h 51mANA
Deal found 3/31$2,993
This Lufthansa deal was found by Cheapflights users on 3/31. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 6/265:30 pmSTL - ICN
2 stops26h 25mLufthansa
sam. 8/912:25 pmICN - STL
1 stop39h 05mLufthansa
Deal found 3/31$3,201

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 mars 31, 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

jeu. 9/25

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

jeu. 10/30

5:50 pm-3:26 pm

2 stops35h 36m

$1,196

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

jeu. 9/25

7:36 pm-11:00 am

2 stops25h 24m

Incheon Intl

jeu. 10/30

11:40 am-1:52 pm

2 stops40h 12m

$1,298

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mer. 5/21

11:32 am-6:45 pm

2 stops41h 13m

Incheon Intl

mar. 5/27

8:45 pm-9:00 am

2 stops26h 15m

$1,340

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

jeu. 4/24

7:01 pm-4:00 am

1 stop18h 59m

Incheon Intl

sam. 5/31

6:40 pm-11:26 pm

1 stop18h 46m

$1,469

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

jeu. 9/25

7:00 am-9:50 pm

2 stops24h 50m

Seoul Gimpo Intl

jeu. 10/30

7:50 am-12:59 pm

2 stops19h 09m

$1,601

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

sam. 9/6

7:59 pm-5:05 pm

2 stops31h 06m

Incheon Intl

ven. 9/12

1:20 am-2:03 pm

2 stops50h 43m

$1,668

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mer. 5/14

4:45 pm-4:20 am

2 stops21h 35m

Incheon Intl

mar. 8/5

11:30 am-8:36 pm

2 stops23h 06m

$1,773

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

ven. 5/16

10:36 am-11:20 am

2 stops34h 44m

Incheon Intl

ven. 8/8

9:50 pm-9:49 pm

2 stops37h 59m

$1,849

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

ven. 6/20

7:30 am-10:25 pm

2 stops24h 55m

Seoul Gimpo Intl

dim. 7/27

12:05 pm-11:20 pm

2 stops49h 15m

$2,185

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

jeu. 6/26

8:00 am-10:20 pm

2 stops24h 20m

Seoul Gimpo Intl

ven. 8/8

7:55 pm-12:46 pm

2 stops30h 51m

$2,993

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 18 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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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.

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 $1,002). Flying from St. Louis to Seoul in June is currently the most expensive (average of $1,661). 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 mars 31, 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 mars 31, 2025.
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,051 reviews
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Japan Airlines
8.3
Very good
1,440 reviews
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
ANA
8.3
Very good
831 reviews
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,899 reviews
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Finnair
7.6
Good
1,267 reviews
Korean Air
8.4
Very good
1,051 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Comfort

8.3

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

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?

    Air Canada, at $1,196, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include WestJet and Delta. These flights start at 3% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Seoul one-way?

    To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $582. Korean Air flights start at $735 while deals on Cathay Pacific start at $764 one-way.

  • 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 $1,002). Flying from St. Louis to Seoul in June is currently the most expensive (average of $1,661). 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 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 mars 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,024FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,673FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,451FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,527FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,889FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$1,479Average$1,488FlexibilityNo cancel feeOn-time79%
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