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$512+ Cheap flights from Incheon Intl (ICN) to St. Louis (STL)

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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
feb. 25 — mar. 41
mar. 2/25
mar. 3/4
1 adult, Economy
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Cheap flight deals from Incheon Intl to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Incheon Intl (ICN) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated febrero 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$842
(United Airlines)

One-way from

$512
(United)

Popular in

August

Cheapest in

March

Average price

$1,534
Provider with most accurate pricing for Incheon Intl-Lambert-St Louis flight deals.
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Provider most trusted by Cheapflights users for Incheon Intl-Lambert-St Louis flights.
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From Incheon Intl to Lambert-St Louis
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One-way flight from Incheon Intl to Lambert-St Louis
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Highest demand for flights based on searches. 21% potential increase in price ($359 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Incheon Intl to St. Louis

Cheapest flights from Incheon Intl to St. Louis
Explore the most affordable flight options available from Incheon Intl to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on febrero 20, 2025.

This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/312:45 pmICN - STL
1 stop21h 11mUnited Airlines
jue. 4/105:54 pmSTL - ICN
1 stop20h 26mUnited Airlines
Deal found 2/19$842
This Gotogate deal was found by Cheapflights users on 2/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 5/57:05 pmICN - STL
1 stop31h 31mAir Canada
vie. 5/167:30 amSTL - ICN
1 stop20h 00mAir Canada
Deal found 2/19$954
This Korean Air deal was found by Cheapflights users on 2/20. 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 Korean Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/17:25 pmICN - STL
1 stop19h 14mKorean Air
mié. 12/316:04 amSTL - ICN
1 stop18h 26mKorean Air
Deal found 2/20$1,376
This Qatar Airways deal was found by Cheapflights users on 2/20. 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 Qatar Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 3/412:20 amICN - STL
2 stops47h 27mQatar Airways
mié. 3/199:28 amSTL - ICN
2 stops34h 32mQatar Airways
Deal found 2/20$1,710
This Ovago deal was found by Cheapflights users on 2/20. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/29:00 amICN - STL
2 stops41h 20mANA
jue. 10/166:15 amSTL - ICN
2 stops31h 55mANA
Deal found 2/20$1,942
This Asiana Airlines deal was found by Cheapflights users on 2/20. 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 Asiana Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/26:20 pmICN - STL
1 stop19h 36mMultiple Airlines
jue. 10/166:00 pmSTL - ICN
1 stop20h 30mMultiple Airlines
Deal found 2/20$1,943

Find flights from Incheon Intl to St. Louis within your budget

Customize your flight search to find flights from Incheon Intl to St. Louis 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 febrero 20, 2025.

Fly from

Incheon Intl

Fly to

St. Louis

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 3/3

12:45 pm-10:06 pm

2 stops24h 21m

Lambert-St Louis

jue. 4/10

5:54 pm-4:20 am

1 stop20h 26m

$842

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 5/5

7:05 pm-12:36 pm

1 stop31h 31m

Lambert-St Louis

vie. 5/16

7:30 am-5:30 pm

1 stop20h 00m

$954

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

sáb. 5/17

6:40 pm-9:33 pm

1 stop16h 53m

Lambert-St Louis

sáb. 5/24

6:45 am-4:25 pm

1 stop19h 40m

$1,655

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 3/4

12:20 am-8:47 am

2 stops47h 27m

Lambert-St Louis

mié. 3/19

9:28 am-10:00 am

2 stops34h 32m

$1,710

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

dom. 4/6

8:40 pm-2:49 pm

3 stops32h 09m

Lambert-St Louis

dom. 4/13

6:11 pm-5:30 pm

2 stops33h 19m

$2,180

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 4/18

11:30 am-11:03 am

2 stops37h 33m

$512

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 6/6

6:00 pm-8:01 pm

1 stop40h 01m

$640

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 8/14

8:45 pm-6:03 pm

2 stops35h 18m

$880

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 4/17

1:20 am-10:12 pm

2 stops34h 52m

$1,055

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 8/14

6:20 pm-11:56 pm

1 stop19h 36m

$1,105

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Incheon Intl 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.

Travel insights for flights from Incheon Intl to St. Louis

Get recent, data-driven insights about flights from Incheon Intl to St. Louis including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Incheon Intl Airport to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to St. Louis (average of $311). Flying from Incheon Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated febrero 20, 2025.
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Korean Air
8.4
Very good
1,037 reviews
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Qatar Airways
7.4
Good
3,613 reviews
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

United Airlines
7.4
Good
8,765 reviews
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

WestJet
7.2
Good
2,801 reviews
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Air Canada
7.0
Good
8,748 reviews
Korean Air
8.4
Very good
1,037 reviews

Food

8.1

Boarding

8.5

Overall

8.4

Entertainment

8.2

Comfort

8.3

Crew

8.7

Reviews

1 / 20

6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Related info for your journey

Find useful and relevant information for your journey from Incheon Intl to St. Louis. 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 into for flights to St. Louis from Incheon Intl?

    Most people fly into Lambert-St Louis (STL) if they book a flight to St. Louis from Incheon Intl. On average, Lambert-St Louis has 0 inbound flights from Incheon Intl per day from 2 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • What are the cheapest airlines flying from Incheon Intl Airport to St. Louis round-trip?

    Flying on United Airlines is currently your cheapest option to St. Louis, with prices starting at $842. Additional round-trip tickets that might be worth considering are offered by Air Canada and Korean Air, with the lowest prices starting at $954 and $1,655, respectively. These flights start at 36% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Incheon Intl Airport to St. Louis one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $512. However, be on the lookout for offers from Air Canada and WestJet, as they are both options that can get you from Incheon Intl Airport to St. Louis for a low price.

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

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

  • How can I find direct flights from Incheon Intl to St. Louis?

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

  • Can I find deals for business class flights from Incheon Intl to St. Louis?

    Yes. Cheapflights offers flight deals from Incheon Intl to St. Louis 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 Incheon Intl Airport to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Incheon Intl Airport to St. Louis (average of $311). Flying from Incheon Intl Airport to St. Louis in March is currently the most expensive (average of $356). 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

Traveling to a place near Incheon Intl Airport?

Book flights to Incheon Intl Airport if you plan to visit one of these locations
Fenton
Fairview Heights
Maryland Heights
Collinsville
Wentzville
Eureka
St. Peters
Festus
Alton
Farmington
Chesterfield

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Alternative routes for Incheon Intl to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Incheon Intl to St. Louis

Discover the top 2 airlines that operate flights from Incheon Intl to St. Louis. 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 febrero 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$941Average$1,464FlexibilityNo cancel feeOn-timeN/A
Korean AirCheapest$1,362Average$1,504FlexibilityNo cancel feeOn-time81%
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