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St. Louis

$576+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
ICN — STL
jun. 23 — jun. 301
lun. 6/23
lun. 6/30
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 18, 2025.

Round-trip from

$699
(United Airlines)

One-way from

$576
(Kiwi.com)

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 18, 2025.

This United Airlines deal was found by Cheapflights users on 6/18. 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.
mié. 11/1212:45 pmICN - STL
2 stops24h 09mUnited Airlines
mié. 12/35:29 pmSTL - ICN
1 stop21h 11mUnited Airlines
Deal found 6/18$699
This Tourvis deal was found by Cheapflights users on 6/17. 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 Tourvis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/59:00 pmICN - STL
1 stop33h 05mMultiple Airlines
vie. 12/52:55 pmSTL - ICN
1 stop23h 25mMultiple Airlines
Deal found 6/17$703
This Delta deal was found by Cheapflights users on 6/16. 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.
sáb. 11/158:05 pmICN - STL
2 stops20h 17mDelta
sáb. 11/226:15 pmSTL - ICN
2 stops31h 15mDelta
Deal found 6/16$735
This American Airlines deal was found by Cheapflights users on 6/18. 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 stop16h 50mAmerican Airlines
mar. 10/147:19 amSTL - ICN
1 stop18h 11mAmerican Airlines
Deal found 6/18$799
This Korean Air deal was found by Cheapflights users on 6/18. 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.
vie. 7/46:40 pmICN - STL
1 stop18h 47mKorean Air
vie. 7/2511:18 amSTL - ICN
1 stop16h 02mKorean Air
Deal found 6/18$953
This Mytrip deal was found by Cheapflights users on 6/18. 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.
mar. 7/225:45 pmICN - STL
2 stops35h 31mAir Canada
vie. 8/151:30 pmSTL - ICN
2 stops60h 35mAir Canada
Deal found 6/18$1,086
This Qatar Airways deal was found by Cheapflights users on 6/16. 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. 10/141:20 amICN - STL
2 stops31h 48mQatar Airways
mar. 10/281:22 pmSTL - ICN
2 stops37h 53mQatar Airways
Deal found 6/16$1,765

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 18, 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

mié. 11/12

12:45 pm-9:54 pm

2 stops24h 09m

Lambert-St Louis

mié. 12/3

5:29 pm-5:40 am

1 stop21h 11m

$699

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mié. 11/5

9:00 pm-3:05 pm

1 stop33h 05m

Lambert-St Louis

vie. 12/5

2:55 pm-5:20 am

1 stop23h 25m

$703

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

sáb. 11/15

8:05 pm-1:22 am

2 stops20h 17m

Lambert-St Louis

sáb. 11/22

6:15 pm-4:30 pm

2 stops31h 15m

$735

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 9/15

5:25 pm-8:15 pm

1 stop16h 50m

Lambert-St Louis

mar. 10/14

7:19 am-3:30 pm

1 stop18h 11m

$799

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 7/4

6:40 pm-11:27 pm

1 stop18h 47m

Lambert-St Louis

vie. 7/25

11:18 am-5:20 pm

1 stop16h 02m

$953

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 7/22

5:45 pm-3:16 pm

2 stops35h 31m

Lambert-St Louis

vie. 8/15

1:30 pm-4:05 pm

2 stops60h 35m

$1,086

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 10/14

1:20 am-7:08 pm

2 stops31h 48m

Lambert-St Louis

mar. 10/28

1:22 pm-5:15 pm

2 stops37h 53m

$1,765

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

mar. 7/8

12:45 pm-6:35 pm

2 stops43h 50m

$576

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 8/22

5:25 pm-11:14 pm

1 stop19h 49m

$725

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

vie. 7/25

10:40 pm-11:20 pm

2 stops38h 40m

$913

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/16

Showing 1-10 of 15 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 18, 2025.
Read through reviews of airlines operating flights from Seoul to St. Louis, such as Korean Air, Delta and Qatar Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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
1,090 reviews
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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
7,964 reviews
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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.
Qatar Airways
7.4
Good
3,590 reviews
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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.
United Airlines
7.4
Good
8,810 reviews
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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.
American Airlines
7.2
Good
10,000 reviews
Korean Air
8.4
Very good
1,090 reviews

Comfort

8.3

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Entertainment

8.2

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 $699. Additional round-trip tickets that might be worth considering are offered by Delta and American Airlines, with the lowest prices starting at $735 and $799, respectively. These flights start at 44% 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 $725. However, be on the lookout for offers from WestJet and United Airlines, 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
Incheon Intl to Springfield flights
Gimpo Intl to Kansas City 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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$687Average$1,100FlexibilityNo cancel feeOn-timeN/A

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