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$455+ Cheap flights from Missouri 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 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEL
Aug 21 — Aug 281
Fri 8/21
Fri 8/28
1 adult, Economy
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Cheap flight deals from Missouri to Seoul

Cheapest flights from Missouri to Seoul
Explore the most affordable flight options available from Missouri to Seoul. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 22, 2026.

This American Airlines deal was found by Cheapflights users on 7/19. 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.
Wed 9/26:36 am
STL
-
ICN
1 stop19h 09m
American Airlines
Wed 9/95:50 pm
ICN
-
STL
1 stop32h 25m
American Airlines
Deal found 7/19$1,093
This American Airlines deal was found by Cheapflights users on 7/20. 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.
Thu 9/35:30 am
MCI
-
ICN
1 stop20h 15m
American Airlines
Thu 9/105:50 pm
ICN
-
MCI
2 stops20h 33m
American Airlines
Deal found 7/20$1,094
This American Airlines deal was found by Cheapflights users on 7/22. 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 8/177:39 pm
MCI
-
ICN
2 stops30h 06m
American Airlines
Tue 9/15:50 pm
ICN
-
MCI
1 stop30h 40m
American Airlines
Deal found 7/22$1,096
This United Airlines deal was found by Cheapflights users on 7/20. 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.
Tue 9/14:40 pm
STL
-
ICN
2 stops21h 40m
United Airlines
Thu 9/105:15 pm
ICN
-
STL
1 stop20h 23m
United Airlines
Deal found 7/20$1,106
This United Airlines deal was found by Cheapflights users on 7/17. 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.
Wed 8/197:11 pm
MCI
-
ICN
2 stops19h 09m
United Airlines
Thu 8/274:50 pm
ICN
-
MCI
2 stops20h 40m
United Airlines
Deal found 7/17$1,106
This Delta deal was found by Cheapflights users on 7/20. 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 10/58:00 am
STL
-
ICN
1 stop17h 20m
Delta
Wed 11/49:35 am
ICN
-
STL
2 stops21h 48m
Delta
Deal found 7/20$1,111
This Delta deal was found by Cheapflights users on 7/17. 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 10/75:40 am
MCI
-
ICN
2 stops21h 40m
Delta
Thu 10/227:00 pm
ICN
-
MCI
2 stops18h 42m
Delta
Deal found 7/17$1,111
This American Airlines deal was found by Cheapflights users on 7/21. 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 10/266:32 am
STL
-
ICN
1 stop19h 53m
American Airlines
Wed 11/256:50 pm
ICN
-
STL
1 stop29h 40m
American Airlines
Deal found 7/21$1,112
This American Airlines deal was found by Cheapflights users on 7/21. 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.
Wed 8/196:20 am
MCI
-
ICN
1 stop19h 25m
American Airlines
Thu 8/275:50 pm
ICN
-
MCI
1 stop31h 53m
American Airlines
Deal found 7/21$1,112
This Delta deal was found by Cheapflights users on 7/17. 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 8/166:01 pm
MCI
-
ICN
1 stop31h 19m
Delta
Tue 8/257:20 pm
ICN
-
MCI
1 stop18h 53m
Delta
Deal found 7/17$1,113
This Cathay Pacific deal was found by Cheapflights users on 7/21. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:29 am
STL
-
ICN
2 stops25h 56m
Multiple Airlines
Sun 10/48:05 pm
ICN
-
STL
2 stops39h 03m
Multiple Airlines
Deal found 7/21$1,120
This Cathay Pacific deal was found by Cheapflights users on 7/20. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/26:00 am
STL
-
ICN
2 stops28h 25m
Multiple Airlines
Wed 9/238:00 am
ICN
-
STL
2 stops29h 43m
Multiple Airlines
Deal found 7/20$1,121

Find flight deals from Missouri to Seoul

Keep the following information in mind while searching for Missouri to Seoul flight deals. Data was last updated July 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,093
(American Airlines)

One-way from

$455
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$1,691
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 Missouri to Seoul (SEL)
Search Deals
One-way flight from Missouri to Seoul (SEL)
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($307 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Missouri to Seoul 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 22, 2026.
Use the filters below to find and compare flights from Missouri to Seoul that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

6:00 am-3:30 pm

1 stop19h 30m

Incheon Intl

Wed 11/25

6:00 pm-8:49 pm

1 stop17h 49m

$1,106

Kansas CityIncheon

MCI - ICN

MCIICN

Kansas City

Wed 9/23

5:13 pm-4:20 am

2 stops21h 07m

Incheon Intl

Mon 10/5

11:30 am-4:34 pm

1 stop19h 04m

$1,106

Kansas CityIncheon

MCI - ICN

MCIICN

Kansas City

Wed 8/19

7:00 am-3:20 pm

1 stop18h 20m

Incheon Intl

Thu 8/27

4:25 pm-8:47 pm

1 stop18h 22m

$1,106

Kansas CityIncheon

MCI - ICN

MCIICN

Kansas City

Wed 8/19

5:13 pm-4:20 am

2 stops21h 07m

Incheon Intl

Thu 8/27

11:30 am-11:30 pm

2 stops26h 00m

$1,106

Kansas CityIncheon

MCI - ICN

MCIICN

Kansas City

Wed 9/23

2:26 pm-4:00 am

1 stop23h 34m

Incheon Intl

Mon 10/5

7:40 pm-11:12 pm

1 stop17h 32m

$1,106

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

7:08 am-3:00 pm

1 stop17h 52m

Incheon Intl

Wed 11/4

6:30 pm-10:41 am

2 stops31h 11m

$1,111

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/5

6:00 am-5:20 pm

2 stops21h 20m

Incheon Intl

Wed 11/4

9:35 am-4:23 pm

2 stops21h 48m

$1,111

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 10/26

4:40 pm-4:40 am

2 stops22h 00m

Incheon Intl

Wed 11/25

12:45 pm-11:09 pm

2 stops25h 24m

$1,111

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 9/1

5:30 pm-4:20 am

2 stops20h 50m

Incheon Intl

Tue 9/8

11:30 am-7:11 pm

2 stops21h 41m

$1,111

Kansas CityIncheon

MCI - ICN

MCIICN

Kansas City

Wed 10/7

6:34 am-4:25 pm

1 stop19h 51m

Incheon Intl

Thu 10/22

7:00 pm-11:42 pm

2 stops18h 42m

$1,111

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/19

Showing 1-10 of 51 resultsSorted by cheapest first
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Best time to book a flight from Missouri to Seoul

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

What is the cheapest month to book a flight from Missouri to Seoul?

Currently, February is the cheapest month in which you can book a flight from Missouri to Seoul (average of $871). Flying from Missouri to Seoul in July is currently the most expensive (average of $1,664). 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.

How much does it cost to fly round-trip from Missouri to Seoul?

Related info for your journey

Find useful and relevant information for your journey from Missouri to Seoul. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Missouri to Seoul?

    There are many flights that can get you from Missouri to Seoul in 18h 20m. Fly via Delta, United Airlines, or Japan Airlines to get the fastest option. There are 6521 mi between Missouri and Seoul. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Missouri to Seoul?

    Most travelers choose Lambert-St Louis - Incheon Intl, Kansas City - Incheon Intl or Lambert-St Louis - Seoul Gimpo Intl when deciding on the best route from Missouri to Seoul.

  • Can I find deals for flights from Missouri to Seoul that include hotel bookings?

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

  • How can I find direct flights from Missouri to Seoul?

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

  • Can I find deals for business class flights from Missouri to Seoul?

    Yes. Cheapflights offers flight deals from Missouri 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 Missouri to Seoul?

    Currently, February is the cheapest month in which you can book a flight from Missouri to Seoul (average of $871). Flying from Missouri to Seoul in July is currently the most expensive (average of $1,664). 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 4 airlines flying from Missouri to Seoul

Discover the top 4 airlines that operate flights from Missouri to Seoul. 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 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$615Average$1,326FlexibilityNo cancel feeOn-time69%
DeltaCheapest$769Average$1,199FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$999Average$1,624FlexibilityNo cancel feeOn-time81%
Asiana AirlinesCheapest$1,204Average$1,772FlexibilityNo cancel feeOn-time76%

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