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St. Louis

$549+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$751
(United Airlines)

One-way from

$549
(American Airlines)

Popular in

August

Cheapest in

March

Average price

$926
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. 23% potential increase in price ($386 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($98 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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. 12/1512:45 pmICN - STL
1 stop20h 08mUnited Airlines
vie. 1/307:05 amSTL - ICN
1 stop18h 10mUnited Airlines
Deal found 6/11$735
This American Airlines deal was found by Cheapflights users on 6/12. 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.
lun. 9/155:25 pmICN - STL
1 stop19h 25mAmerican Airlines
mar. 10/147:19 amSTL - ICN
1 stop18h 11mAmerican Airlines
Deal found 6/12$828
This Asiana Airlines deal was found by Cheapflights users on 6/10. 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.
mar. 8/198:55 pmICN - STL
1 stop33h 58mMultiple Airlines
dom. 11/165:29 pmSTL - ICN
2 stops33h 06mMultiple Airlines
Deal found 6/10$872
This Gotogate deal was found by Cheapflights users on 6/11. 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. 11/176:50 pmICN - STL
2 stops35h 36mAir Canada
jue. 11/204:15 pmSTL - ICN
2 stops33h 50mAir Canada
Deal found 6/11$927
This Mytrip deal was found by Cheapflights users on 6/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/38:55 pmICN - STL
1 stop21h 59mAsiana Airlines
sáb. 7/266:00 amSTL - ICN
1 stop32h 00mAsiana Airlines
Deal found 6/12$973
This Hawaiian Airlines deal was found by Cheapflights users on 6/10. 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.
jue. 12/118:35 pmICN - STL
1 stop32h 17mHawaiian Airlines
dom. 12/217:00 amSTL - ICN
1 stop20h 35mHawaiian Airlines
Deal found 6/10$1,333
This Alaska Airlines deal was found by Cheapflights users on 6/12. 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.
dom. 7/279:25 pmICN - STL
2 stops64h 34mAlaska Airlines
dom. 8/37:32 pmSTL - ICN
2 stops57h 28mAlaska Airlines
Deal found 6/12$1,397
This Korean Air deal was found by Cheapflights users on 6/10. 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.
jue. 12/117:30 pmICN - STL
1 stop18h 32mKorean Air
dom. 12/216:04 amSTL - ICN
1 stop18h 26mKorean Air
Deal found 6/10$1,696
This Qatar Airways deal was found by Cheapflights users on 6/10. 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.
dom. 12/2112:20 amICN - STL
2 stops36h 42mQatar Airways
lun. 12/292:00 pmSTL - ICN
2 stops36h 15mQatar Airways
Deal found 6/10$1,808

Cheapflights Fare Finder

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 junio 12, 2025.
Use the filters below to find and compare flights from Incheon Intl Airport to St. Louis that are best for you.

Fly from

Incheon Intl

Fly to

St. Louis

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 9/15

11:30 am-4:53 pm

1 stop19h 23m

Lambert-St Louis

mar. 10/14

5:47 pm-4:20 am

1 stop20h 33m

$751

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 9/15

5:25 pm-10:50 pm

1 stop19h 25m

Lambert-St Louis

mar. 10/14

7:19 am-3:30 pm

1 stop18h 11m

$828

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 8/19

8:55 pm-4:53 pm

1 stop33h 58m

Lambert-St Louis

dom. 11/16

5:29 pm-5:35 pm

2 stops33h 06m

$872

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 11/17

6:50 pm-3:26 pm

2 stops35h 36m

Lambert-St Louis

jue. 11/20

4:15 pm-5:05 pm

2 stops33h 50m

$927

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 7/3

8:55 pm-4:54 am

1 stop21h 59m

Lambert-St Louis

sáb. 7/26

6:00 am-4:00 am

1 stop32h 00m

$973

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

dom. 7/27

9:25 pm-11:59 pm

2 stops64h 34m

Lambert-St Louis

dom. 8/3

7:32 pm-7:00 pm

2 stops57h 28m

$1,397

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

dom. 8/3

7:40 pm-12:38 am

1 stop18h 58m

Lambert-St Louis

jue. 8/14

7:35 am-3:20 pm

1 stop17h 45m

$1,750

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 11/14

12:20 am-9:41 pm

2 stops36h 21m

Lambert-St Louis

vie. 11/21

11:20 am-5:15 pm

2 stops38h 55m

$1,972

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 10/2

8:35 pm-5:34 pm

1 stop34h 59m

Lambert-St Louis

mar. 10/7

3:57 pm-6:35 pm

1 stop36h 38m

$2,069

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 11/11

6:50 pm-8:52 am

1 stop29h 02m

$549

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 17 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Incheon Intl Airport to St. Louis

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 junio 12, 2025.
Read through reviews of airlines operating flights from Seoul to St. Louis, such as Korean Air, Asiana Airlines and Alaska Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Korean Air
8.4
Very good
1,088 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Asiana Airlines
8.2
Very good
440 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Alaska Airlines
8.0
Very good
10,000 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Delta
8.0
Very good
7,946 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.
Hawaiian Airlines
7.9
Good
2,494 reviews
Korean Air
8.4
Very good
1,088 reviews

Food

8.1

Entertainment

8.2

Boarding

8.5

Overall

8.4

Comfort

8.3

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

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 1 airline. 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 $751. Additional round-trip tickets that might be worth considering are offered by American Airlines and Air Canada, with the lowest prices starting at $828 and $927, respectively. These flights start at 40% 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 American Airlines, with whom users have recently found tickets for as low as $549. 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
O'Fallon
Maryland Heights
Fairview Heights
Collinsville
Eureka
St. Peters
Glencoe
Festus
Alton
Farmington

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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.
Incheon Intl to Kansas City flights
Gimpo Intl to St. Louis flights
Gimpo Intl to Kansas City flights
Incheon Intl to Springfield flights

Top airline flying from Incheon Intl to St. Louis

Discover the top airline 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$687Average$1,206FlexibilityNo cancel feeOn-timeN/A

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