How long is the flight from St. Louis to Seoul?

For as low as $646, Delta can have you in Seoul from St. Louis in 19h 15m. The distance from St. Louis to Seoul is about 6670 mi. Both multi-stop and nonstop flights can be found to your destination and back.

What are the cheapest airlines flying from St. Louis to Seoul round-trip?

Air Canada, at $799, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include American Airlines and Delta. These flights start at 28% lower than the current average price 3 months from now.

In terms of precipitation, rainfall in Seoul ranges from 1.1 - 10.0 inches per month. July is typically the wettest month, when rainfall can reach 10.0 in. December is typically the driest time to visit Seoul when rainfall is around 1.1 in.

If weather is an important factor for your trip to Seoul, 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 35.6 F).

What are the most popular airlines that fly from St. Louis to Seoul?

Before booking your flight from St. Louis to Seoul check out the most popular airlines for this route: Delta, Air Canada or American Airlines.

Most accurate provider : When it comes to deals on St. Louis-Seoul flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Seoul flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Seoul flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Seoul flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from St. Louis to Seoul?

For a flight from St. Louis to Seoul, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 outbound flights to Seoul per day. 5 airlines have flights to Seoul from Lambert-St Louis on a regular basis.

Can I find deals for flights from St. Louis to Seoul that include hotel bookings?

Yes. In addition to deals on St. Louis to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Seoul?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Seoul.

Can I find deals for business class flights from St. Louis to Seoul?

Yes. Cheapflights offers flight deals from St. Louis to Seoul 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 Seoul

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheap flight deals from St. Louis to Seoul

Cheapest flights from St. Louis to Seoul
Explore the most affordable flight options available from St. Louis to Seoul. 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 Seoul
Discover carefully curated flight deals from St. Louis to Seoul 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

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

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

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

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

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 12/204:05 pmSTL - GMP

2 stops52h 15mMultiple Airlines

Sat 12/277:40 pmGMP - STL

2 stops43h 11mMultiple Airlines

Deal found 12/15

$3,412

Sun 1/46:29 amSTL - ICN

1 stop19h 21mDelta

Thu 1/158:05 pmICN - STL

2 stops18h 20mDelta

Deal found 12/17

$2,016

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

Tue 1/134:05 pmSTL - ICN

3 stops30h 30mMultiple Airlines

Tue 1/206:40 amICN - STL

2 stops32h 19mMultiple Airlines

Deal found 12/16

$1,866

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

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 Seoul
Search for one-way flight options from St. Louis to Seoul. 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

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

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 Seoul

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$656 (Expedia)
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 Seoul (SEL)

Search Deals

One-way flight from Lambert-St Louis to Seoul (SEL)

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

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 27 results

Compare providers for flights from St. Louis to Seoul

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Seoul in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Seoul flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-Seoul flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-Seoul flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Seoul flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Seoul flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul 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 Seoul

What is the cheapest month to book a flight from St. Louis to Seoul?

Currently, April is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $691). Flying from St. Louis to Seoul 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 SEL?

Unlike at noon, when flights are generally more expensive, you can save up to 13% on flights from St. Louis to Seoul by exploring options for tickets in the afternoon.

Reviews of airlines servicing Seoul

Read reviews from past customers who have flown Korean Air, Delta, and United Airlines from St. Louis to Seoul. Users can see the overall rating for each airline as well as how each is rated 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 Seoul?
For a flight from St. Louis to Seoul, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 outbound flights to Seoul per day. 5 airlines have flights to Seoul from Lambert-St Louis on a regular basis.
How long is the flight from St. Louis to Seoul?
For as low as $646, Delta can have you in Seoul from St. Louis in 19h 15m. The distance from St. Louis to Seoul is about 6670 mi. Both multi-stop and nonstop flights can be found to your destination and back.
What are the cheapest airlines flying from St. Louis to Seoul round-trip?
Air Canada, at $799, was found to be the cheapest airline from St. Louis to Seoul.Alternate airlines to your destination round-trip include American Airlines and Delta. These flights start at 28% lower than the current average price 3 months from now.
Can I find deals for flights from St. Louis to Seoul that include hotel bookings?
Yes. In addition to deals on St. Louis to Seoul flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Seoul?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Seoul.
Can I find deals for business class flights from St. Louis to Seoul?
Yes. Cheapflights offers flight deals from St. Louis to Seoul 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 Seoul?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Seoul (average of $691). Flying from St. Louis to Seoul 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

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from St. Louis to Seoul

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 Seoul (SEL)

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 Seoul with Cheapflights

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Cheap flight deals from St. Louis to Seoul

Cheapest flights from St. Louis to SeoulExplore the most affordable flight options available from St. Louis to Seoul. 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 Seoul. 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 Seoul

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 Seoul that are best for you.

Compare providers for flights from St. Louis to Seoul

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Seoul in December.

Best time to book a flight from St. Louis to Seoul

Have a flexible travel schedule? Discover the best time to fly to Seoul from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Seoul

What is the cheapest month to book a flight from St. Louis to Seoul?

What is the cheapest time of day to fly from STL to SEL?

Find hourly flight availability from St. Louis to Seoul. 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.

Reviews of airlines servicing Seoul

Read reviews from past customers who have flown Korean Air, Delta, and United Airlines from St. Louis to Seoul. Users can see the overall rating for each airline as well as how each is rated 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 Seoul. 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 Seoul?

How long is the flight from St. Louis to Seoul?

What are the cheapest airlines flying from St. Louis to Seoul round-trip?

Can I find deals for flights from St. Louis to Seoul that include hotel bookings?

How can I find direct flights from St. Louis to Seoul?

Can I find deals for business class flights from St. Louis to Seoul?

What is the cheapest month to book a flight from St. Louis to Seoul?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for St. Louis to Seoul

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Cheapest flights from St. Louis to Seoul
Explore the most affordable flight options available from St. Louis to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.