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$393+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$855
(American Airlines)

One-way from

$393
(FlightHub)

Popular in

August

Cheapest in

December

Average price

$1,422
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. 14% potential increase in price ($205 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($56 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/12. 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 6/12$855
This United Airlines deal was found by Cheapflights users on 6/12. 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 10/244:50 pmSTL - ICN
2 stops21h 30mUnited Airlines
Sun 11/212:45 pmICN - STL
1 stop19h 18mUnited Airlines
Deal found 6/12$871
This Delta deal was found by Cheapflights users on 6/12. 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 9/128:50 amSTL - ICN
1 stop18h 30mDelta
Sat 10/257:40 pmICN - STL
1 stop19h 42mDelta
Deal found 6/12$962
This Air Canada deal was found by Cheapflights users on 6/11. 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 9/14:00 pmSTL - ICN
2 stops34h 05mAir Canada
Tue 9/305:45 pmICN - STL
2 stops35h 33mAir Canada
Deal found 6/11$998
This Travelocity deal was found by Cheapflights users on 6/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/64:05 pmSTL - ICN
2 stops58h 00mMultiple Airlines
Sun 9/148:30 amICN - STL
2 stops25h 27mMultiple Airlines
Deal found 6/10$1,061
This KAYAK deal was found by Cheapflights users on 6/12. 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.
Sat 10/187:23 amSTL - GMP
2 stops48h 27mJapan Airlines
Mon 10/2712:05 pmGMP - STL
2 stops24h 48mJapan Airlines
Deal found 6/12$1,073
This Japan Airlines deal was found by Cheapflights users on 6/12. 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.
Wed 10/158:01 pmSTL - GMP
2 stops24h 44mMultiple Airlines
Mon 10/207:55 amGMP - STL
2 stops18h 53mMultiple Airlines
Deal found 6/12$1,247
This Korean Air deal was found by Cheapflights users on 6/11. 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.
Fri 8/86:00 amSTL - ICN
1 stop20h 50mKorean Air
Tue 8/126:50 pmICN - STL
1 stop35h 16mKorean Air
Deal found 6/11$1,383
This oojo deal was found by Cheapflights users on 6/11. 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.
Sat 10/255:28 pmSTL - ICN
2 stops34h 52mTurkish Airlines
Fri 10/3112:10 amICN - STL
2 stops29h 19mTurkish Airlines
Deal found 6/11$1,468
This Delta deal was found by Cheapflights users on 6/11. 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.
Wed 7/911:18 amSTL - TAE
2 stops19h 17mDelta
Wed 7/167:05 amTAE - STL
2 stops31h 33mDelta
Deal found 6/11$1,517
This Delta deal was found by Cheapflights users on 6/12. 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.
Sun 7/277:11 pmSTL - PUS
2 stops33h 09mDelta
Sun 8/310:40 amPUS - STL
2 stops27h 58mDelta
Deal found 6/12$1,519
This oojo deal was found by Cheapflights users on 6/12. 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.
Fri 10/244:12 pmSTL - ICN
2 stops35h 03mQatar Airways
Sat 11/112:20 amICN - STL
2 stops38h 38mQatar Airways
Deal found 6/12$1,602

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 June 12, 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

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

$855

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 10/24

4:50 pm-4:20 am

2 stops21h 30m

Incheon Intl

Sun 11/2

12:45 pm-6:03 pm

1 stop19h 18m

$871

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/12

8:50 am-5:20 pm

1 stop18h 30m

Incheon Intl

Sat 10/25

7:40 pm-1:22 am

1 stop19h 42m

$962

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

4:00 pm-4:05 pm

2 stops34h 05m

Incheon Intl

Tue 9/30

5:45 pm-3:18 pm

2 stops35h 33m

$998

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/6

4:05 pm-4:05 pm

2 stops58h 00m

Incheon Intl

Sun 9/14

8:30 am-7:57 pm

2 stops25h 27m

$1,061

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Sat 10/18

7:23 am-9:50 pm

2 stops48h 27m

Seoul Gimpo Intl

Mon 10/27

12:05 pm-10:53 pm

2 stops24h 48m

$1,073

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 10/15

8:01 pm-10:45 am

2 stops24h 44m

Seoul Gimpo Intl

Mon 10/20

7:55 am-12:48 pm

2 stops18h 53m

$1,247

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 8/8

6:00 am-4:50 pm

1 stop20h 50m

Incheon Intl

Tue 8/12

6:50 pm-4:06 pm

1 stop35h 16m

$1,383

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 10/25

5:28 pm-6:20 pm

2 stops34h 52m

Incheon Intl

Fri 10/31

12:10 am-3:29 pm

2 stops29h 19m

$1,468

St. LouisDaegu

STL - TAE

STLTAE

Lambert-St Louis

Wed 7/9

11:18 am-8:35 pm

2 stops19h 17m

Daegu

Wed 7/16

7:05 am-12:38 am

2 stops31h 33m

$1,517

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 21 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 $1,000). 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 June 12, 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.

Rainfall in South Korea by month

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

In terms of precipitation, rainfall in South Korea ranges from 0.8 - 10.2 inches per month. July is typically the wettest month, when rainfall can reach 10.2 in. January is typically the driest time to visit South Korea when rainfall is around 0.8 in.

Temperature in South Korea by month

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

If weather is an important factor for your trip to South Korea, 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 28.4 F).

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 June 12, 2025.
Read through reviews of airlines operating flights from St. Louis to South Korea, such as Korean Air, Japan Airlines and ANA. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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
1,088 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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.
Japan Airlines
8.3
Very good
1,489 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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.
ANA
8.3
Very good
882 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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
8.0
Very good
7,950 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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.
Qatar Airways
7.4
Good
3,584 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Overall

8.4

Boarding

8.5

Comfort

8.3

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.

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

    $393 is the cheapest one-way deal found within the past few days, from Japan Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $418 and $494, 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 - Jeju City 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 $1,000). 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,087FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,476FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,498FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,840FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,790FlexibilityNo cancel feeOn-time81%

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