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 $852. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at $864 and $991, respectively. These flights start at 35% 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 $506. However, be on the lookout for offers from United Airlines and Qatar Airways, as they are both options that can get you from Incheon Intl Airport to St. Louis for a low price.

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.

What is the cheapest day to fly from Incheon Intl Airport to St. Louis?

Travelers seeking maximum savings on their Incheon Intl Airport to St. Louis flight should consider departing on Thursday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Incheon Intl Airport to St. Louis?

Users have found that leaving on a Wednesday can be a cost-effective option. It’s possible to save up to 83% on your flight compared to booking on days when demand is much higher.

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

It’s optimal to fly from Incheon Intl Airport to St. Louis at noon. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the morning.

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.

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.

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.

$467+ Flights from Incheon Intl Airport to St. Louis

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Cheap flight deals from Incheon Intl to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$852 (United Airlines)
One-way from	$467 (Kiwi.com)
Popular in	August
Cheapest in	March
Average price	$843

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

Search Deals

Highest demand for flights based on searches. 23% potential increase in price ($399 potential increase over avg. RT price).

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Cheapest flight prices on average. 6% potential price decrease ($81 potential savings vs. average RT price).

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Average for round-trip flights in March 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 March 28, 2025.

Mon 4/144:50 pmICN - STL

2 stops31h 06mUnited Airlines

Fri 4/185:54 pmSTL - ICN

1 stop20h 26mUnited Airlines

Deal found 3/27

$852

Thu 4/105:45 pmICN - STL

2 stops35h 04mAir Canada

Sat 4/193:40 pmSTL - ICN

2 stops58h 25mAir Canada

Deal found 3/26

$864

Mon 9/156:40 pmICN - STL

1 stop18h 21mDelta

Tue 10/143:30 pmSTL - ICN

1 stop32h 40mDelta

Deal found 3/27

$991

Fri 5/308:55 pmICN - STL

1 stop22h 08mAsiana Airlines

Fri 8/15:41 pmSTL - ICN

1 stop20h 19mAsiana Airlines

Deal found 3/27

$1,160

Thu 4/106:20 pmICN - STL

1 stop19h 39mMultiple Airlines

Sat 4/195:58 pmSTL - ICN

1 stop20h 32mMultiple Airlines

Deal found 3/26

$1,348

Sat 12/207:30 pmICN - STL

1 stop17h 36mKorean Air

Fri 1/26:04 amSTL - ICN

1 stop18h 26mKorean Air

Deal found 3/27

$1,639

Sat 7/265:25 pmICN - STL

1 stop20h 49mAmerican Airlines

Fri 8/17:00 amSTL - ICN

1 stop18h 30mAmerican Airlines

Deal found 3/27

$1,826

Fri 12/1912:20 amICN - STL

2 stops32h 38mQatar Airways

Fri 1/212:52 pmSTL - ICN

2 stops37h 23mQatar Airways

Deal found 3/27

$1,943

Best flights from Incheon Intl to St. Louis
Discover carefully curated flight deals from Incheon Intl to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 28, 2025.

Mon 4/144:50 pmICN - STL

2 stops31h 06mUnited Airlines

Fri 4/185:54 pmSTL - ICN

1 stop20h 26mUnited Airlines

Deal found 3/27

$852

Thu 4/105:45 pmICN - STL

2 stops35h 04mAir Canada

Sat 4/193:40 pmSTL - ICN

2 stops58h 25mAir Canada

Deal found 3/26

$864

Mon 9/156:40 pmICN - STL

1 stop18h 21mDelta

Tue 10/143:30 pmSTL - ICN

1 stop32h 40mDelta

Deal found 3/27

$991

Fri 5/308:55 pmICN - STL

1 stop22h 08mAsiana Airlines

Fri 8/15:41 pmSTL - ICN

1 stop20h 19mAsiana Airlines

Deal found 3/27

$1,160

Mon 6/165:25 pmICN - STL

1 stop29h 53mAmerican Airlines

Mon 8/45:30 amSTL - ICN

1 stop20h 00mAmerican Airlines

Deal found 3/27

$1,168

Thu 4/106:20 pmICN - STL

1 stop19h 39mMultiple Airlines

Sat 4/195:58 pmSTL - ICN

1 stop20h 32mMultiple Airlines

Deal found 3/26

$1,348

Sun 9/141:20 amICN - STL

2 stops36h 05mQatar Airways

Tue 10/142:40 pmSTL - ICN

2 stops36h 25mQatar Airways

Deal found 3/27

$2,094

Last-minute flights from Incheon Intl to St. Louis
Discover last-minute flight deals from Incheon Intl to St. Louis. Data last updated March 28, 2025 and is based on user searches.

Wed 4/91:20 amICN - STL

2 stops34h 52mQatar Airways

Sat 4/199:52 amSTL - ICN

2 stops41h 13mQatar Airways

Deal found 3/26

$2,203

Thu 4/105:45 pmICN - STL

2 stops35h 04mAir Canada

Sat 4/193:40 pmSTL - ICN

2 stops58h 25mAir Canada

Deal found 3/26

$864

Thu 4/106:20 pmICN - STL

1 stop19h 39mMultiple Airlines

Sat 4/195:58 pmSTL - ICN

1 stop20h 32mMultiple Airlines

Deal found 3/26

$1,348

Mon 4/144:50 pmICN - STL

2 stops31h 06mUnited Airlines

Fri 4/185:54 pmSTL - ICN

1 stop20h 26mUnited Airlines

Deal found 3/27

$852

One-way flights from Incheon Intl to St. Louis
Search for one-way flight options from Incheon Intl to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 28, 2025.

Thu 4/1712:45 pmICN - STL

2 stops25h 14mMultiple Airlines

Deal found 3/27

$467

Thu 4/175:25 pmICN - STL

1 stop29h 36mAmerican Airlines

Deal found 3/27

$506

Fri 4/184:50 pmICN - STL

2 stops31h 06mUnited Airlines

Deal found 3/27

$521

Thu 4/171:20 amICN - STL

2 stops36h 13mQatar Airways

Deal found 3/27

$1,360

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/14

4:50 pm-9:56 am

2 stops31h 06m

Lambert-St Louis

Fri 4/18

5:54 pm-4:20 am

1 stop20h 26m

$852

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/10

5:45 pm-2:49 pm

2 stops35h 04m

Lambert-St Louis

Sat 4/19

3:40 pm-4:05 pm

2 stops58h 25m

$864

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

6:40 pm-11:01 pm

1 stop18h 21m

Lambert-St Louis

Tue 10/14

3:30 pm-2:10 pm

1 stop32h 40m

$991

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 5/30

8:55 pm-5:03 am

1 stop22h 08m

Lambert-St Louis

Fri 8/1

5:41 pm-4:00 am

1 stop20h 19m

$1,160

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 6/16

5:25 pm-9:18 am

1 stop29h 53m

Lambert-St Louis

Mon 8/4

5:30 am-3:30 pm

1 stop20h 00m

$1,168

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/10

6:20 pm-11:59 pm

1 stop19h 39m

Lambert-St Louis

Sat 4/19

5:58 pm-4:30 am

1 stop20h 32m

$1,348

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 9/14

1:20 am-11:25 pm

2 stops36h 05m

Lambert-St Louis

Tue 10/14

2:40 pm-5:05 pm

2 stops36h 25m

$2,094

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/17

12:45 pm-11:59 pm

2 stops25h 14m

$467

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 4/17

5:25 pm-9:01 am

1 stop29h 36m

$506

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Tue 9/9

11:30 am-11:18 pm

2 stops25h 48m

$516

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 15 results

Compare providers for flights from Incheon Intl to St. Louis

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

Provider	Price Accuracy	Trust Score*
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
Expedia	Price Accuracy1 star	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 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.

Cheapflights Insights

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

Rainfall in St. Louis 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

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

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

Asiana Airlines

8.2

Very good

440 reviews

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

Delta

8.0

Very good

7,897 reviews

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

Qatar Airways

7.4

Good

3,538 reviews

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

United Airlines

7.4

Good

8,603 reviews

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

American Airlines

7.2

Good

10,000 reviews

Asiana Airlines

8.2

Very good

440 reviews

Reviews

1 / 20

4.0

Okay

Ramón,Feb 2025

ICN - SGN

The same as my experience from NYC to Incheon, just 1 EVER LASTING LONG LINE. No group calling out anything, just telling everyone to line up.

Related info for your journey

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 $852. Additional round-trip tickets that might be worth considering are offered by Air Canada and Delta, with the lowest prices starting at $864 and $991, respectively. These flights start at 35% 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 $506. However, be on the lookout for offers from United Airlines and Qatar Airways, 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

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Other flights to St. Louis

Top 2 airlines flying from Incheon Intl to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$941	Average$1,464	FlexibilityNo cancel fee	On-timeN/A
Korean Air	Cheapest$1,312	Average$1,482	FlexibilityNo cancel fee	On-time81%

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$467+ 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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Incheon Intl to St. Louis with Cheapflights

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Cheap flight deals from Incheon Intl to St. Louis

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Round-trip from

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Find flight deals from Incheon Intl to St. Louis

Cheapest flights from Incheon Intl to St. LouisExplore 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 March 28, 2025.

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 March 28, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Incheon Intl to St. Louis

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 Incheon Intl to St. Louis in March.

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.

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.

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

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?

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

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

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

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

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

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

Traveling to a place near Incheon Intl Airport?

Browse thousands of different options on Cheapflights for your next trip

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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.

Top 2 airlines flying from Incheon Intl to St. Louis

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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 March 28, 2025.