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$368+ 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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Feb 2 — Feb 91
Mon 2/2
Mon 2/9
1 adult, Economy
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Cheap 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 January 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 12/31. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/232:50 pmSTL - ICN
1 stop36h 45mMultiple Airlines
Thu 1/298:35 pmICN - STL
1 stop32h 19mMultiple Airlines
Deal found 12/31$733
This Alaska Airlines deal was found by Cheapflights users on 1/2. 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.
Sat 3/285:30 pmSTL - ICN
1 stop35h 05mMultiple Airlines
Sat 4/48:35 pmICN - STL
1 stop17h 24mMultiple Airlines
Deal found 1/2$753
This Alaska Airlines deal was found by Cheapflights users on 12/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/222:50 pmSTL - ICN
1 stop36h 45mMultiple Airlines
Mon 1/268:35 pmICN - STL
1 stop32h 19mMultiple Airlines
Deal found 12/31$759
This Jetabroad deal was found by Cheapflights users on 1/2. 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.
Sat 3/285:30 pmSTL - ICN
1 stop35h 05mMultiple Airlines
Sun 4/58:35 pmICN - STL
1 stop17h 24mMultiple Airlines
Deal found 1/2$770
This Alaska Airlines deal was found by Cheapflights users on 12/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:41 amSTL - ICN
1 stop21h 54mAlaska Airlines
Sun 10/258:35 pmICN - STL
1 stop17h 24mAlaska Airlines
Deal found 12/31$846
This Delta deal was found by Cheapflights users on 1/3. 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 4/46:29 amSTL - ICN
1 stop20h 51mDelta
Sun 5/34:25 pmICN - STL
1 stop21h 08mDelta
Deal found 1/3$847
This FlightHub deal was found by Cheapflights users on 1/2. 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.
Thu 1/297:04 amSTL - GMP
2 stops24h 01mJapan Airlines
Thu 2/512:05 pmGMP - STL
2 stops26h 54mJapan Airlines
Deal found 1/2$847
This United Airlines deal was found by Cheapflights users on 12/31. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/223:11 pmSTL - ICN
2 stops23h 29mUnited Airlines
Mon 1/266:00 pmICN - STL
2 stops19h 58mUnited Airlines
Deal found 12/31$850
This Delta deal was found by Cheapflights users on 1/3. 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 3/285:29 pmSTL - ICN
1 stop33h 51mDelta
Sun 4/57:20 pmICN - STL
1 stop19h 01mDelta
Deal found 1/3$852
This Delta deal was found by Cheapflights users on 1/2. 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 4/186:32 amSTL - ICN
1 stop19h 53mDelta
Sat 4/256:50 pmICN - STL
1 stop18h 43mDelta
Deal found 1/2$857
This Japan Airlines deal was found by Cheapflights users on 12/31. 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 Japan Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/226:00 amSTL - GMP
2 stops37h 55mJapan Airlines
Mon 1/2612:05 pmGMP - STL
2 stops45h 11mJapan Airlines
Deal found 12/31$880
This Expedia deal was found by Cheapflights users on 12/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/76:00 amSTL - GMP
2 stops37h 55mJapan Airlines
Wed 1/147:40 pmGMP - STL
2 stops43h 19mJapan Airlines
Deal found 12/31$900

Find 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 January 3, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$733
(Kiwi.com)

One-way from

$368
(Orbitz)

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 South Korea
Search Deals
One-way flight from Lambert-St Louis to South Korea
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($314 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% 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 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 January 3, 2026.
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

Thu 1/22

2:50 pm-6:35 pm

1 stop36h 45m

Incheon Intl

Mon 1/26

8:35 pm-1:54 pm

1 stop32h 19m

$759

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 3/28

5:30 pm-6:35 pm

1 stop35h 05m

Incheon Intl

Sun 4/5

8:35 pm-11:59 pm

1 stop17h 24m

$770

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/4

10:07 am-4:00 am

1 stop27h 53m

Incheon Intl

Sun 5/3

7:40 pm-11:12 pm

1 stop17h 32m

$847

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Thu 1/29

7:04 am-10:05 pm

2 stops24h 01m

Seoul Gimpo Intl

Thu 2/5

12:05 pm-11:59 pm

2 stops26h 54m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/7

9:59 am-5:45 am

1 stop28h 46m

Incheon Intl

Sat 2/14

6:00 pm-7:56 pm

1 stop16h 56m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 4/17

6:32 am-4:25 pm

1 stop19h 53m

Incheon Intl

Sat 4/25

7:20 pm-9:31 pm

1 stop16h 11m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 4/5

6:29 am-5:20 pm

1 stop20h 51m

Incheon Intl

Sun 5/3

7:20 pm-12:22 am

1 stop19h 02m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/4

10:07 am-4:00 am

1 stop27h 53m

Incheon Intl

Sat 5/2

7:20 pm-9:31 pm

1 stop16h 11m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 1/23

3:11 pm-5:40 am

2 stops23h 29m

Incheon Intl

Thu 1/29

12:45 pm-3:37 pm

1 stop17h 52m

$850

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 1/22

3:11 pm-5:40 am

2 stops23h 29m

Incheon Intl

Mon 1/26

6:00 pm-10:58 pm

2 stops19h 58m

$850

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

Showing 1-10 of 27 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, April is the cheapest month in which you can book a flight from St. Louis to South Korea (average of $643). Flying from St. Louis to South Korea 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.

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 January 3, 2026.

It’s optimal to fly from St. Louis to South Korea in the evening. By choosing this option you can save up to 51% on the cost of your flight, compared to a flight in the afternoon.

What is the cheapest day to fly from St. Louis to South Korea?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to South Korea. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their St. Louis to South Korea flight should consider departing on Wednesday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 January 3, 2026.
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
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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
1,185 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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
7.9
Good
8,023 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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
9,136 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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
11,080 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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
10,586 reviews
Korean Air
8.4
Very good
1,185 reviews

Boarding

8.5

Comfort

8.3

Food

8.1

Overall

8.4

Entertainment

8.2

Crew

8.7

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 Delta, Japan Airlines, and Korean Air fly from St. Louis to South Korea in about 22h 10m. The time it takes to get you to your destination can typically vary by up to 5h 43m. St. Louis and South Korea are separated by a distance of 6705 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 Delta. You may also be able to find cheap deals on American Airlines and United Airlines, with prices starting from $470 and $488, 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 - Busan Gimhae 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, April is the cheapest month in which you can book a flight from St. Louis to South Korea (average of $643). Flying from St. Louis to South Korea 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

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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 January 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,078FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$846Average$1,846FlexibilityNo cancel feeOn-time71%
DeltaCheapest$846Average$1,055FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$870Average$1,635FlexibilityNo cancel feeOn-time69%
Korean AirCheapest$999Average$2,040FlexibilityNo cancel feeOn-time81%

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