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$438+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$847
(American Airlines)

One-way from

$438
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$1,420
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. 13% potential increase in price ($193 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 July 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 July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/3. 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 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 7/3$847
This United Airlines deal was found by Cheapflights users on 7/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:15 amSTL - ICN
2 stops19h 45mUnited Airlines
Sat 9/2011:30 amICN - STL
2 stops23h 16mUnited Airlines
Deal found 7/3$857
This Delta deal was found by Cheapflights users on 7/2. 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.
Mon 9/16:00 amSTL - ICN
2 stops20h 30mDelta
Sat 9/2010:15 amICN - STL
2 stops22h 50mDelta
Deal found 7/2$861
This FlightHub deal was found by Cheapflights users on 7/1. 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.
Wed 8/206:45 amSTL - GMP
2 stops25h 05mJapan Airlines
Wed 8/277:55 amGMP - STL
2 stops19h 17mJapan Airlines
Deal found 7/1$876
This Air Canada deal was found by Cheapflights users on 7/2. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/164:00 pmSTL - ICN
2 stops34h 05mAir Canada
Mon 10/137:05 pmICN - STL
1 stop38h 33mAir Canada
Deal found 7/2$1,102
This Travelocity deal was found by Cheapflights users on 7/1. 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.
Wed 7/94:00 pmSTL - ICN
1 stop35h 30mMultiple Airlines
Mon 7/1410:35 amICN - STL
2 stops24h 15mMultiple Airlines
Deal found 7/1$1,125
This Delta deal was found by Cheapflights users on 7/1. 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 8/156:40 amSTL - TAE
2 stops23h 55mDelta
Fri 8/227:05 amTAE - STL
2 stops31h 33mDelta
Deal found 7/1$1,238
This Delta deal was found by Cheapflights users on 7/3. 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.
Fri 8/156:40 amSTL - PUS
2 stops35h 05mDelta
Thu 8/218:05 amPUS - STL
2 stops30h 33mDelta
Deal found 7/3$1,241
This Korean Air deal was found by Cheapflights users on 6/30. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:45 amSTL - PUS
2 stops23h 00mKorean Air
Thu 12/184:10 pmPUS - STL
2 stops21h 52mKorean Air
Deal found 6/30$1,245
This Mytrip deal was found by Cheapflights users on 7/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/152:30 pmSTL - PUS
3 stops30h 45mMultiple Airlines
Thu 8/217:35 amPUS - STL
3 stops42h 09mMultiple Airlines
Deal found 7/3$1,535
This Korean Air deal was found by Cheapflights users on 7/3. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/158:46 amSTL - TAE
2 stops21h 49mKorean Air
Thu 8/217:05 amTAE - STL
2 stops30h 18mKorean Air
Deal found 7/3$1,616
This Ovago deal was found by Cheapflights users on 7/1. 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.
Wed 7/306:14 amSTL - GMP
2 stops25h 36mMultiple Airlines
Wed 8/64:10 pmGMP - STL
2 stops20h 59mMultiple Airlines
Deal found 7/1$1,890

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 July 3, 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

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

5:15 am-3:00 pm

2 stops19h 45m

Incheon Intl

Sat 9/20

11:30 am-8:46 pm

2 stops23h 16m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sat 9/20

10:15 am-7:05 pm

2 stops22h 50m

$861

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 8/20

6:45 am-9:50 pm

2 stops25h 05m

Seoul Gimpo Intl

Wed 8/27

7:55 am-1:12 pm

2 stops19h 17m

$876

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 7/16

4:00 pm-4:05 pm

2 stops34h 05m

Incheon Intl

Mon 10/13

7:05 pm-7:38 pm

1 stop38h 33m

$1,102

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 7/15

6:41 am-5:55 pm

1 stop21h 14m

Incheon Intl

Fri 7/18

8:55 pm-4:54 am

1 stop21h 59m

$1,198

St. LouisDaegu

STL - TAE

STLTAE

Lambert-St Louis

Fri 8/15

6:40 am-8:35 pm

2 stops23h 55m

Daegu

Fri 8/22

7:05 am-12:38 am

2 stops31h 33m

$1,238

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Fri 8/15

6:40 am-7:45 am

2 stops35h 05m

Busan Gimhae

Thu 8/21

8:05 am-12:38 am

2 stops30h 33m

$1,241

St. LouisBusan

STL - PUS

STLPUS

Lambert-St Louis

Fri 8/15

2:30 pm-11:15 am

3 stops30h 45m

Busan Gimhae

Thu 8/21

7:35 am-11:44 am

3 stops42h 09m

$1,535

St. LouisDaegu

STL - TAE

STLTAE

Lambert-St Louis

Fri 8/15

8:46 am-8:35 pm

2 stops21h 49m

Daegu

Thu 8/21

7:05 am-11:23 pm

2 stops30h 18m

$1,616

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 20 results
1
2

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 $998). 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 July 3, 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 July 3, 2025.
Get a feel of what it's like to fly with Korean Air, ANA, and Japan 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
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
8.4
Very good
893 reviews
Korean Air
8.4
Very good
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
1,505 reviews
Korean Air
8.4
Very good
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
7,982 reviews
Korean Air
8.4
Very good
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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
8,861 reviews
Korean Air
8.4
Very good
1,101 reviews

Boarding

8.5

Entertainment

8.2

Crew

8.7

Food

8.1

Overall

8.4

Comfort

8.3

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?

    $479 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 Delta and American Airlines, with prices starting from $481 and $487, 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 $998). 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,087FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,452FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,498FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,845FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,752FlexibilityNo cancel feeOn-time81%

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