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 19h 15m. The time it takes to get you to your destination can typically vary by up to 4h 46m. 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.

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.

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).

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.

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.

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.

$344+ Flights from St. Louis to South Korea

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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 December 18, 2025.

Sat 12/2010:30 amSTL - ICN

2 stops38h 45mUnited Airlines

Sat 12/2712:45 pmICN - STL

2 stops24h 37mUnited Airlines

Deal found 12/15

$1,878

Sat 12/206:44 pmSTL - ICN

1 stop31h 01mAmerican Airlines

Sat 12/277:15 pmICN - STL

1 stop18h 41mAmerican Airlines

Deal found 12/15

$2,083

Sat 12/2010:10 pmSTL - ICN

2 stops51h 10mMultiple Airlines

Sat 12/278:35 pmICN - STL

1 stop18h 15mMultiple Airlines

Deal found 12/15

$2,240

Sat 12/202:45 pmSTL - ICN

2 stops34h 30mUnited Airlines

Wed 12/3112:45 pmICN - STL

2 stops24h 37mUnited Airlines

Deal found 12/16

$2,339

Sat 12/207:02 pmSTL - ICN

2 stops30h 48mDelta

Wed 12/317:30 pmICN - STL

1 stop17h 46mDelta

Deal found 12/16

$2,513

Fri 12/198:42 pmSTL - ICN

2 stops32h 38mMultiple Airlines

Sun 1/119:00 pmICN - STL

1 stop30h 12mMultiple Airlines

Deal found 12/15

$2,711

Fri 12/195:45 pmSTL - ICN

2 stops31h 30mUnited Airlines

Sun 1/116:00 pmICN - STL

2 stops30h 22mUnited Airlines

Deal found 12/15

$2,740

Wed 12/178:05 pmSTL - ICN

2 stops30h 30mDelta

Wed 12/317:30 pmICN - STL

1 stop17h 46mDelta

Deal found 12/17

$3,105

Sat 12/204:05 pmSTL - GMP

2 stops52h 15mMultiple Airlines

Sat 12/277:40 pmGMP - STL

2 stops43h 11mMultiple Airlines

Deal found 12/15

$3,412

Wed 12/174:05 pmSTL - GMP

2 stops39h 25mMultiple Airlines

Tue 12/233:50 pmGMP - STL

2 stops38h 39mMultiple Airlines

Deal found 12/16

$11,508

Best flights from St. Louis to South Korea
Discover carefully curated flight deals from St. Louis to South Korea that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

Fri 3/277:00 amSTL - ICN

1 stop21h 35mMultiple Airlines

Wed 4/88:35 pmICN - STL

1 stop17h 20mMultiple Airlines

Deal found 12/17

$646

Fri 1/166:35 amSTL - ICN

1 stop19h 15mDelta

Fri 1/237:40 pmICN - STL

1 stop16h 58mDelta

Deal found 12/17

$646

Sun 2/155:25 pmSTL - ICN

1 stop21h 15mUnited Airlines

Thu 2/1912:45 pmICN - STL

1 stop18h 59mUnited Airlines

Deal found 12/16

$746

Wed 1/217:04 amSTL - GMP

2 stops24h 01mJapan Airlines

Sun 1/257:40 pmGMP - STL

2 stops43h 19mJapan Airlines

Deal found 12/16

$780

Fri 1/306:35 amSTL - PUS

2 stops23h 10mKorean Air

Fri 2/64:10 pmPUS - STL

2 stops22h 27mKorean Air

Deal found 12/15

$1,113

Wed 3/257:00 amSTL - ICN

1 stop21h 35mMultiple Airlines

Wed 4/88:35 pmICN - STL

1 stop17h 20mMultiple Airlines

Deal found 12/17

$646

Tue 1/136:10 amSTL - ICN

1 stop18h 20mDelta

Tue 1/209:35 amICN - STL

1 stop22h 02mDelta

Deal found 12/16

$746

Sat 1/311:15 pmSTL - ICN

2 stops25h 25mUnited Airlines

Sat 2/712:45 pmICN - STL

2 stops23h 28mUnited Airlines

Deal found 12/16

$750

Sat 1/315:04 pmSTL - ICN

1 stop21h 41mDelta

Sat 2/79:35 amICN - STL

1 stop22h 02mDelta

Deal found 12/16

$746

Tue 1/137:04 amSTL - GMP

2 stops24h 01mJapan Airlines

Tue 1/208:00 amGMP - STL

2 stops25h 16mJapan Airlines

Deal found 12/16

$866

Sat 2/75:56 pmSTL - ICN

2 stops30h 34mDelta

Sun 4/267:00 pmICN - STL

2 stops19h 36mDelta

Deal found 12/16

$750

Sun 3/298:26 amSTL - GMP

2 stops47h 54mANA

Wed 4/812:40 pmGMP - STL

2 stops39h 47mANA

Deal found 12/17

$1,972

Sat 1/317:04 amSTL - GMP

2 stops36h 51mJapan Airlines

Sat 2/712:05 pmGMP - STL

2 stops26h 54mJapan Airlines

Deal found 12/16

$984

Thu 2/196:35 amSTL - TAE

2 stops22h 10mKorean Air

Mon 2/237:40 amTAE - STL

2 stops30h 43mKorean Air

Deal found 12/16

$1,117

Thu 1/296:35 amSTL - TAE

2 stops22h 10mKorean Air

Mon 2/27:40 amTAE - STL

2 stops27h 57mKorean Air

Deal found 12/15

$1,117

Thu 1/156:35 amSTL - PUS

2 stops22h 00mKorean Air

Thu 1/224:10 pmPUS - STL

2 stops22h 27mKorean Air

Deal found 12/17

$1,119

Sat 4/187:50 amSTL - GMP

2 stops36h 55mJapan Airlines

Fri 4/247:55 amGMP - STL

2 stops29h 21mJapan Airlines

Deal found 12/17

$1,397

Fri 1/304:05 pmSTL - PUS

3 stops34h 35mMultiple Airlines

Fri 2/67:20 amPUS - STL

2 stops47h 09mMultiple Airlines

Deal found 12/15

$1,722

Sat 4/187:50 amSTL - GMP

2 stops36h 55mJapan Airlines

Sat 4/257:55 amGMP - STL

2 stops29h 21mJapan Airlines

Deal found 12/17

$1,509

Thu 5/286:30 amSTL - GMP

2 stops25h 20mJapan Airlines

Sat 6/137:55 amGMP - STL

2 stops19h 11mJapan Airlines

Deal found 12/16

$1,802

Wed 3/256:38 amSTL - GMP

2 stops25h 27mJapan Airlines

Tue 4/77:20 pmGMP - STL

2 stops41h 56mJapan Airlines

Deal found 12/17

$2,012

Tue 3/316:38 amSTL - GMP

2 stops25h 12mJapan Airlines

Wed 4/87:55 amGMP - STL

2 stops29h 21mJapan Airlines

Deal found 12/17

$2,012

Thu 1/154:05 pmSTL - PUS

2 stops27h 45mMultiple Airlines

Thu 1/228:35 amPUS - STL

3 stops27h 23mMultiple Airlines

Deal found 12/17

$5,069

Last-minute flights from St. Louis to South Korea
Discover last-minute flight deals from St. Louis to South Korea. Data last updated December 18, 2025 and is based on user searches.

Tue 1/136:10 amSTL - ICN

1 stop18h 20mDelta

Tue 1/209:35 amICN - STL

1 stop22h 02mDelta

Deal found 12/16

$746

Tue 1/135:00 pmSTL - ICN

1 stop21h 40mUnited Airlines

Tue 1/2012:45 pmICN - STL

1 stop17h 52mUnited Airlines

Deal found 12/16

$846

Tue 1/137:04 amSTL - GMP

2 stops24h 01mJapan Airlines

Tue 1/208:00 amGMP - STL

2 stops25h 16mJapan Airlines

Deal found 12/16

$866

Thu 1/156:35 amSTL - PUS

2 stops22h 00mKorean Air

Thu 1/224:10 pmPUS - STL

2 stops22h 27mKorean Air

Deal found 12/17

$1,119

Fri 1/166:35 amSTL - ICN

1 stop19h 15mDelta

Fri 1/237:40 pmICN - STL

1 stop16h 58mDelta

Deal found 12/17

$646

Wed 1/217:04 amSTL - GMP

2 stops24h 01mJapan Airlines

Sun 1/257:40 pmGMP - STL

2 stops43h 19mJapan Airlines

Deal found 12/16

$780

Thu 1/296:35 amSTL - TAE

2 stops22h 10mKorean Air

Mon 2/27:40 amTAE - STL

2 stops27h 57mKorean Air

Deal found 12/15

$1,117

Fri 1/306:35 amSTL - PUS

2 stops23h 10mKorean Air

Fri 2/64:10 pmPUS - STL

2 stops22h 27mKorean Air

Deal found 12/15

$1,113

Fri 1/304:05 pmSTL - PUS

3 stops34h 35mMultiple Airlines

Fri 2/67:20 amPUS - STL

2 stops47h 09mMultiple Airlines

Deal found 12/15

$1,722

Sat 1/316:19 pmSTL - ICN

1 stop33h 16mMultiple Airlines

Sat 2/78:35 pmICN - STL

1 stop32h 19mMultiple Airlines

Deal found 12/17

$656

Sat 1/315:00 pmSTL - ICN

1 stop21h 40mUnited Airlines

Sat 2/712:45 pmICN - STL

2 stops23h 13mUnited Airlines

Deal found 12/17

$750

Sat 1/317:04 amSTL - GMP

2 stops36h 51mJapan Airlines

Sat 2/712:05 pmGMP - STL

2 stops26h 54mJapan Airlines

Deal found 12/16

$984

One-way flights from St. Louis to South Korea
Search for one-way flight options from St. Louis to South Korea. Find affordable one-way fares based on user searches. Data last updated December 18, 2025.

Sat 3/72:47 pmSTL - ICN

1 stop36h 48mMultiple Airlines

Deal found 12/17

$344

Mon 3/92:09 pmSTL - ICN

2 stops25h 31mMultiple Airlines

Deal found 12/17

$433

Wed 12/315:16 amSTL - ICN

1 stop20h 29mAmerican Airlines

Deal found 12/17

$448

Sun 3/156:10 amSTL - ICN

2 stops20h 20mDelta

Deal found 12/16

$508

Thu 1/156:10 amSTL - PUS

2 stops22h 25mKorean Air

Deal found 12/17

$570

Sun 3/158:06 pmSTL - ICN

3 stops59h 44mMultiple Airlines

Deal found 12/16

$590

Wed 12/312:45 pmSTL - ICN

2 stops23h 55mUnited Airlines

Deal found 12/17

$653

Thu 1/152:50 pmSTL - PUS

3 stops54h 20mMultiple Airlines

Deal found 12/17

$690

Mon 12/225:02 pmSTL - ICN

2 stops32h 13mUnited Airlines

Deal found 12/17

$753

Wed 12/316:05 amSTL - ICN

3 stops48h 30mMultiple Airlines

Deal found 12/17

$766

Mon 12/226:20 amSTL - GMP

2 stops24h 45mJapan Airlines

Deal found 12/17

$1,517

Find flight deals from St. Louis to South Korea

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$646 (Delta)
One-way from	$344 (Kiwi.com)
Popular in	August
Cheapest in	October
Average price	$1,187

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. 11% potential increase in price ($144 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to South Korea that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 3/27

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/8

8:35 pm-11:55 pm

1 stop17h 20m

$646

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 1/16

6:35 am-4:50 pm

1 stop19h 15m

Incheon Intl

Fri 1/23

7:40 pm-9:38 pm

1 stop16h 58m

$646

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/25

7:00 am-6:35 pm

1 stop21h 35m

Incheon Intl

Wed 4/8

8:35 pm-11:55 pm

1 stop17h 20m

$646

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 2/15

5:25 pm-5:40 am

1 stop21h 15m

Incheon Intl

Thu 2/19

12:45 pm-4:44 pm

1 stop18h 59m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 1/13

6:10 am-3:30 pm

1 stop18h 20m

Incheon Intl

Tue 1/20

9:35 am-4:37 pm

1 stop22h 02m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 1/31

5:04 pm-5:45 am

1 stop21h 41m

Incheon Intl

Sat 2/7

9:35 am-4:37 pm

1 stop22h 02m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 1/31

1:15 pm-5:40 am

2 stops25h 25m

Incheon Intl

Sat 2/7

12:45 pm-9:13 pm

2 stops23h 28m

$750

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/7

5:56 pm-3:30 pm

2 stops30h 34m

Incheon Intl

Sun 4/26

7:00 pm-12:36 am

2 stops19h 36m

$750

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Wed 1/21

7:04 am-10:05 pm

2 stops24h 01m

Seoul Gimpo Intl

Sun 1/25

7:40 pm-11:59 pm

2 stops43h 19m

$780

St. LouisSeoul

STL - GMP

STLGMP

Lambert-St Louis

Tue 1/13

7:04 am-10:05 pm

2 stops24h 01m

Seoul Gimpo Intl

Tue 1/20

8:00 am-6:16 pm

2 stops25h 16m

$866

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 35 results

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 $691). 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?

It’s optimal to fly from St. Louis to South Korea in the evening. By choosing this option you can save up to 49% on the cost of your flight, compared to a flight in the morning.

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

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 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

1,186 reviews

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

1,186 reviews

Korean Air

8.4

Very good

1,186 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Delta

7.9

Good

8,008 reviews

Korean Air

8.4

Very good

1,186 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

United Airlines

7.4

Good

9,093 reviews

Korean Air

8.4

Very good

1,186 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

American Airlines

7.2

Good

11,055 reviews

Korean Air

8.4

Very good

1,186 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Air Canada

7.1

Good

10,534 reviews

Korean Air

8.4

Very good

1,186 reviews

Reviews

1 / 20

10.0

Excellent

Chris,Mar 2025

SEA - ICN

Related info for your journey

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 19h 15m. The time it takes to get you to your destination can typically vary by up to 4h 46m. 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 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, April is the cheapest month in which you can book a flight from St. Louis to South Korea (average of $691). 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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Top 5 airlines flying from St. Louis to South Korea

Airline	Cheapest	Average	Flexibility	On-time
Air Canada	Cheapest$799	Average$1,102	FlexibilityNo cancel fee	On-time67%
American Airlines	Cheapest$846	Average$1,846	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$846	Average$1,055	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$870	Average$1,635	FlexibilityNo cancel fee	On-time69%
Korean Air	Cheapest$999	Average$2,040	FlexibilityNo cancel fee	On-time81%

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$344+ 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 3/7. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to South Korea with Cheapflights

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Cheap flight deals from St. Louis to South Korea

Cheapest flights from St. Louis to South KoreaExplore 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 December 18, 2025.

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 December 18, 2025.

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 December 18, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to South Korea that are best for you.

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.

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?

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 December 18, 2025.

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 December 16, 2024.

Reviews of airlines servicing South Korea

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.

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.

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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 December 18, 2025.