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$563+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
May 4 — May 111
Sun 5/4
Sun 5/11
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 April 29, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,160
(United Airlines)

One-way from

$563
(United Airlines)

Popular in

August

Cheapest in

December

Average price

$1,165
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 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. 10% potential increase in price ($141 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($33 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 29, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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 11/107:05 amSTL - ICN
1 stop31h 35mUnited Airlines
Thu 11/2712:45 pmICN - STL
1 stop19h 18mUnited Airlines
Deal found 4/29$993
This Delta deal was found by Cheapflights users on 4/29. 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 11/105:45 pmSTL - ICN
2 stops30h 45mDelta
Thu 11/279:35 amICN - STL
2 stops23h 27mDelta
Deal found 4/29$1,060
This Hawaiian Airlines deal was found by Cheapflights users on 4/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/163:17 pmSTL - ICN
1 stop37h 18mHawaiian Airlines
Fri 9/198:35 pmICN - STL
1 stop17h 24mHawaiian Airlines
Deal found 4/28$1,083
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Tue 10/142:55 pmSTL - ICN
1 stop37h 40mAlaska Airlines
Fri 10/178:35 pmICN - STL
1 stop17h 21mAlaska Airlines
Deal found 4/29$1,161
This Air Canada deal was found by Cheapflights users on 4/28. 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.
Tue 9/164:05 pmSTL - ICN
2 stops34h 00mAir Canada
Fri 9/196:00 pmICN - STL
1 stop39h 57mAir Canada
Deal found 4/28$1,178
This EVA Air deal was found by Cheapflights users on 4/28. 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.
Mon 9/16:30 pmSTL - ICN
2 stops26h 30mMultiple Airlines
Tue 9/307:45 pmICN - STL
2 stops32h 54mMultiple Airlines
Deal found 4/28$1,259
This Fareboom deal was found by Cheapflights users on 4/29. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/142:55 pmSTL - ICN
2 stops30h 05mEVA Air
Fri 10/177:45 pmICN - STL
2 stops32h 07mEVA Air
Deal found 4/29$1,294
This KAYAK deal was found by Cheapflights users on 4/28. 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.
Tue 9/167:30 amSTL - GMP
2 stops24h 20mJapan Airlines
Fri 9/197:55 amGMP - STL
2 stops18h 53mJapan Airlines
Deal found 4/28$1,479
This oojo deal was found by Cheapflights users on 4/29. 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.
Mon 9/110:08 amSTL - ICN
2 stops40h 57mQatar Airways
Wed 9/31:20 amICN - STL
2 stops36h 39mQatar Airways
Deal found 4/29$1,746
This Expedia deal was found by Cheapflights users on 4/28. 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.
Tue 4/293:30 pmSTL - GMP
2 stops40h 50mMultiple Airlines
Sat 5/107:55 amGMP - STL
2 stops29h 09mMultiple Airlines
Deal found 4/28$1,797
This Korean Air deal was found by Cheapflights users on 4/29. 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.
Wed 7/236:00 amSTL - ICN
1 stop18h 10mKorean Air
Tue 7/297:40 pmICN - STL
1 stop18h 58mKorean Air
Deal found 4/29$1,806
This Jetabroad deal was found by Cheapflights users on 4/29. 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.
Wed 7/306:30 amSTL - ICN
2 stops22h 15mWestJet
Sun 8/38:45 pmICN - STL
2 stops26h 56mWestJet
Deal found 4/29$1,818

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 April 29, 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 7/7

6:00 am-3:00 pm

1 stop19h 00m

Incheon Intl

Wed 7/16

4:50 pm-4:54 am

1 stop26h 04m

$1,160

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 7/5

5:00 pm-3:20 pm

1 stop32h 20m

Incheon Intl

Wed 7/9

10:15 am-5:08 pm

1 stop20h 53m

$1,410

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 9/16

7:30 am-9:50 pm

2 stops24h 20m

Seoul Gimpo Intl

Fri 9/19

7:55 am-12:48 pm

2 stops18h 53m

$1,479

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 7/5

1:30 pm-4:05 pm

2 stops36h 35m

Incheon Intl

Wed 7/9

6:00 pm-8:00 pm

1 stop40h 00m

$1,497

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 5/13

6:30 am-11:00 am

2 stops38h 30m

Incheon Intl

Mon 5/19

6:20 pm-2:07 pm

1 stop33h 47m

$1,506

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 7/23

6:00 am-2:10 pm

1 stop18h 10m

Incheon Intl

Tue 7/29

7:40 pm-12:38 am

1 stop18h 58m

$1,806

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 5/21

10:05 am-6:45 pm

2 stops42h 40m

Incheon Intl

Sat 6/14

8:45 pm-4:50 pm

2 stops34h 05m

$1,825

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 7/5

7:32 pm-5:05 pm

2 stops55h 33m

Incheon Intl

Sun 7/20

1:20 am-6:33 pm

2 stops55h 13m

$1,939

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Mon 5/26

7:32 am-9:50 pm

2 stops24h 18m

Seoul Gimpo Intl

Mon 6/2

12:05 pm-9:55 pm

2 stops23h 50m

$2,034

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 7/12

7:32 pm-7:00 pm

2 stops33h 28m

Incheon Intl

Mon 7/14

9:25 pm-11:59 pm

2 stops40h 34m

$2,138

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 22 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 $1,001). 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 April 29, 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 April 29, 2025.
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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
1,066 reviews
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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
1,459 reviews
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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.
China Airlines
8.3
Very good
732 reviews
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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
855 reviews
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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.
Alaska Airlines
8.0
Very good
9,961 reviews
Korean Air
8.4
Very good
1,066 reviews

Crew

8.7

Boarding

8.5

Comfort

8.3

Entertainment

8.2

Food

8.1

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 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?

    $563 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on WestJet and Air Canada, with prices starting from $742 and $747, 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 $1,001). 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 6 airlines flying from St. Louis to South Korea

Discover the top 6 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 April 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,076FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,679FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,532FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,611FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,887FlexibilityNo cancel feeOn-time81%
Japan AirlinesCheapest$1,479Average$1,488FlexibilityNo cancel feeOn-time79%

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