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$448+ Cheap flights from St. Louis (STL) to South Korea

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheap flight deals from St. Louis to South Korea

Keep the following information in mind while searching for St. Louis to South Korea flight deals. Data was last updated August 18, 2025.

Round-trip from

$851
(Tourvis)

One-way from

$448
(American Airlines)

Popular in

August

Cheapest in

October

Average price

$1,807
From Lambert-St Louis to South Korea
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One-way flight from Lambert-St Louis to South Korea
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Highest demand for flights based on searches. 12% potential increase in price ($173 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($55 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to South Korea

Cheapest flights from St. Louis to South Korea
Explore the most affordable flight options available from St. Louis to South Korea. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Tourvis deal was found by Cheapflights users on 8/18. 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 Tourvis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/206:00 amSTL - ICN
1 stop22h 35mHawaiian Airlines
Fri 2/68:35 pmICN - STL
1 stop32h 17mHawaiian Airlines
Deal found 8/18$851
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 9/197:40 amSTL - ICN
1 stop17h 40mDelta
Thu 2/55:50 pmICN - STL
1 stop20h 50mDelta
Deal found 8/18$857
This Delta deal was found by Cheapflights users on 8/18. 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.
Fri 10/246:50 amSTL - ICN
1 stop18h 30mDelta
Sat 11/16:00 pmICN - STL
1 stop18h 04mDelta
Deal found 8/18$866
This Ovago deal was found by Cheapflights users on 8/18. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/17:01 amSTL - GMP
2 stops37h 44mJapan Airlines
Thu 9/47:55 amGMP - STL
2 stops21h 57mJapan Airlines
Deal found 8/18$870
This United Airlines deal was found by Cheapflights users on 8/18. 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 10/23:23 pmSTL - ICN
2 stops22h 57mUnited Airlines
Thu 10/911:30 amICN - STL
2 stops23h 16mUnited Airlines
Deal found 8/18$871
This Jetabroad deal was found by Cheapflights users on 8/16. 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 Jetabroad is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/317:59 pmSTL - GMP
2 stops24h 46mJapan Airlines
Mon 12/87:50 amGMP - STL
2 stops21h 45mJapan Airlines
Deal found 8/16$906
This American Airlines deal was found by Cheapflights users on 8/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:01 amSTL - ICN
1 stop18h 29mAmerican Airlines
Tue 8/265:25 pmICN - STL
1 stop19h 49mAmerican Airlines
Deal found 8/18$942
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 10/249:00 amSTL - ICN
2 stops29h 20mUnited Airlines
Sat 11/15:00 pmICN - STL
2 stops32h 39mUnited Airlines
Deal found 8/18$950
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:00 amSTL - ICN
1 stop22h 35mMultiple Airlines
Sun 10/266:55 pmICN - STL
2 stops28h 12mMultiple Airlines
Deal found 8/18$951
This United Airlines deal was found by Cheapflights users on 8/17. 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 11/296:15 amSTL - ICN
2 stops32h 25mUnited Airlines
Thu 12/412:45 pmICN - STL
2 stops24h 13mUnited Airlines
Deal found 8/17$953
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/198:01 pmSTL - GMP
2 stops31h 59mJapan Airlines
Tue 8/267:55 amGMP - STL
2 stops18h 59mJapan Airlines
Deal found 8/18$966
This Air Canada deal was found by Cheapflights users on 8/17. 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 9/11:30 pmSTL - ICN
1 stop36h 45mAir Canada
Tue 9/307:05 pmICN - STL
1 stop34h 13mAir Canada
Deal found 8/17$991

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to South Korea 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 18, 2025.
Use the filters below to find and compare flights from St. Louis to South Korea that are best for you.

Fly from

St. Louis

Fly to

South Korea

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

6:00 am-6:35 pm

1 stop22h 35m

Incheon Intl

Fri 2/6

8:35 pm-1:52 pm

1 stop32h 17m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

1:39 pm-4:20 am

2 stops24h 41m

Incheon Intl

Thu 2/5

12:45 pm-4:26 pm

2 stops18h 41m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

3:55 pm-4:00 am

1 stop22h 05m

Incheon Intl

Mon 2/9

5:50 pm-8:39 pm

1 stop17h 49m

$857

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-8:05 am

2 stops28h 40m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

6:00 am-5:20 pm

1 stop21h 20m

Incheon Intl

Tue 2/3

5:50 pm-11:40 pm

1 stop20h 50m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

1:39 pm-4:20 am

2 stops24h 41m

Incheon Intl

Tue 2/3

12:45 pm-4:26 pm

2 stops18h 41m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/21

7:40 am-3:20 pm

1 stop17h 40m

Incheon Intl

Mon 2/9

9:35 am-4:55 pm

1 stop22h 20m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/21

6:00 am-5:20 pm

1 stop21h 20m

Incheon Intl

Wed 2/4

9:35 am-4:55 pm

1 stop22h 20m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/19

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sat 2/7

8:05 pm-12:37 am

2 stops19h 32m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/19

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sun 2/8

8:05 pm-12:37 am

2 stops19h 32m

$857

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 34 results
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Best time to book a flight from St. Louis to South Korea

Have a flexible travel schedule? Discover the best time to fly to South Korea 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 South Korea

What is the cheapest month to book a flight from St. Louis to South Korea?

Currently, February is the cheapest month in which you can book a flight from St. Louis to South Korea (average of $992). Flying from St. Louis to South Korea 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 KR?

Find hourly flight availability from St. Louis to South Korea. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

When flying from St. Louis to South Korea, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Reviews of airlines servicing South Korea

Get insights into the airlines that provide service to South Korea. 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 South Korea. Reviews last updated August 18, 2025.
Get a feel of what it's like to fly with Korean Air, Delta, and United Airlines from St. Louis to South Korea by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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
7,981 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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.
United Airlines
7.4
Good
8,925 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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.
American Airlines
7.2
Good
10,000 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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.
Air Canada
7.1
Good
9,992 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Food

8.1

Crew

8.7

Overall

8.4

Boarding

8.5

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 South Korea. 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 South Korea?

    If you book a flight to South Korea from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

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

    Airlines like Hawaiian Airlines, United Airlines, and Delta fly from St. Louis to South Korea in about 22h 05m. The time it takes to get you to your destination can typically vary by up to 2h 36m. St. Louis and South Korea are separated by a distance of 6670 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    $448 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Japan Airlines and United Airlines, with prices starting from $459 and $514, respectively.

  • What are the most popular routes from St. Louis to South Korea?

    When deciding which route to take from St. Louis to South Korea consider Lambert-St Louis - Incheon Intl, Lambert-St Louis - Seoul Gimpo Intl or Lambert-St Louis - Daegu as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to South Korea 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 South Korea?

    Currently, February is the cheapest month in which you can book a flight from St. Louis to South Korea (average of $992). Flying from St. Louis to South Korea 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

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Alternative routes for St. Louis to South Korea

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from St. Louis to South Korea

Discover the top 5 airlines that operate flights from St. Louis to South Korea. 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,081FlexibilityNo cancel feeOn-time67%
DeltaCheapest$877Average$1,385FlexibilityNo 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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