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Incheon Intl

$448+ Cheap flights from St. Louis (STL) to Incheon Intl (ICN)

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
Aug 23 — Aug 301
Sat 8/23
Sat 8/30
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Incheon Intl are usually found in January or November, booked 10 days in advance, depart on a Wednesday or Sunday and return on a Wednesday

Cheap flight deals from St. Louis to Incheon Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Incheon Intl (ICN). 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 August 18, 2025.

Round-trip from

$851
(Tourvis)

One-way from

$448
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$1,372
From Lambert-St Louis to Incheon Intl
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One-way flight from Lambert-St Louis to Incheon Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($58 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from St. Louis to Incheon Intl

Cheapest flights from St. Louis to Incheon Intl
Explore the most affordable flight options available from St. Louis to Incheon Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 18, 2025.

This Tourvis deal was found by Cheapflights users on 8/18. 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 Tourvis is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/206:00 amSTL - ICN
1 stop22h 35mHawaiian Airlines
Fri 2/68:35 pmICN - STL
1 stop32h 17mHawaiian Airlines
Deal found 8/18$851
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/197:40 amSTL - ICN
1 stop17h 40mDelta
Thu 2/55:50 pmICN - STL
1 stop20h 50mDelta
Deal found 8/18$857
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:50 amSTL - ICN
1 stop18h 30mDelta
Sat 11/16:00 pmICN - STL
1 stop18h 04mDelta
Deal found 8/18$866
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Thu 10/23:23 pmSTL - ICN
2 stops22h 57mUnited Airlines
Thu 10/911:30 amICN - STL
2 stops23h 16mUnited Airlines
Deal found 8/18$871
This American Airlines deal was found by Cheapflights users on 8/18. 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.
Tue 8/197:01 amSTL - ICN
1 stop18h 29mAmerican Airlines
Tue 8/265:25 pmICN - STL
1 stop19h 49mAmerican Airlines
Deal found 8/18$942
This United Airlines deal was found by Cheapflights users on 8/18. 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.
Fri 10/249:00 amSTL - ICN
2 stops29h 20mUnited Airlines
Sat 11/15:00 pmICN - STL
2 stops32h 39mUnited Airlines
Deal found 8/18$950
This Trip.com deal was found by Cheapflights users on 8/18. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:00 amSTL - ICN
1 stop22h 35mMultiple Airlines
Sun 10/266:55 pmICN - STL
2 stops28h 12mMultiple Airlines
Deal found 8/18$951
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Sat 11/296:15 amSTL - ICN
2 stops32h 25mUnited Airlines
Thu 12/412:45 pmICN - STL
2 stops24h 13mUnited Airlines
Deal found 8/17$953
This Air Canada deal was found by Cheapflights users on 8/17. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/11:30 pmSTL - ICN
1 stop36h 45mAir Canada
Tue 9/307:05 pmICN - STL
1 stop34h 13mAir Canada
Deal found 8/17$991
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:01 amSTL - ICN
2 stops21h 19mDelta
Sun 10/268:05 pmICN - STL
2 stops18h 19mDelta
Deal found 8/18$1,015
This Delta deal was found by Cheapflights users on 8/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/193:40 pmSTL - ICN
1 stop22h 20mDelta
Tue 8/267:20 pmICN - STL
2 stops27h 16mDelta
Deal found 8/18$1,029

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Incheon Intl 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 August 18, 2025.
Use the filters below to find and compare flights from St. Louis to Incheon Intl Airport that are best for you.

Fly from

St. Louis

Fly to

Incheon Intl

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

6:00 am-6:35 pm

1 stop22h 35m

Incheon Intl

Fri 2/6

8:35 pm-1:52 pm

1 stop32h 17m

$851

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

1:39 pm-4:20 am

2 stops24h 41m

Incheon Intl

Thu 2/5

12:45 pm-4:26 pm

2 stops18h 41m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

3:55 pm-4:00 am

1 stop22h 05m

Incheon Intl

Mon 2/9

5:50 pm-8:39 pm

1 stop17h 49m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

Sat 9/20

5:25 pm-8:05 am

2 stops28h 40m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

6:00 am-5:20 pm

1 stop21h 20m

Incheon Intl

Tue 2/3

5:50 pm-11:40 pm

1 stop20h 50m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 9/20

1:39 pm-4:20 am

2 stops24h 41m

Incheon Intl

Tue 2/3

12:45 pm-4:26 pm

2 stops18h 41m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/21

7:40 am-3:20 pm

1 stop17h 40m

Incheon Intl

Mon 2/9

9:35 am-4:55 pm

1 stop22h 20m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sun 9/21

6:00 am-5:20 pm

1 stop21h 20m

Incheon Intl

Wed 2/4

9:35 am-4:55 pm

1 stop22h 20m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/19

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sat 2/7

8:05 pm-12:37 am

2 stops19h 32m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Fri 9/19

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

Sun 2/8

8:05 pm-12:37 am

2 stops19h 32m

$857

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/17

Showing 1-10 of 17 results
1
2

Best time to book a flight from St. Louis to Incheon Intl

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

How far ahead should I book a flight from St. Louis to Incheon Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Incheon Intl. Price data was last updated on August 8, 2025.

Booking 9 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Incheon Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, February is the cheapest month in which you can book a flight from St. Louis to Incheon Intl Airport (average of $992). Flying from St. Louis to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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 time of day to fly from STL to ICN?

Find hourly flight availability from St. Louis to Incheon Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 18, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Incheon Intl Airport in the afternoon. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight at noon.

Reviews of airlines servicing Incheon Intl

Get insights into the airlines that provide service to Incheon Intl. 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 Incheon Intl. Reviews last updated August 18, 2025.
Read reviews from past customers who have flown Korean Air, Delta, and United Airlines from St. Louis to Incheon Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Korean Air
8.4
Very good
1,131 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Delta
8.0
Very good
7,981 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
United Airlines
7.4
Good
8,925 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
American Airlines
7.2
Good
10,000 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.
Air Canada
7.1
Good
9,992 reviews
Korean Air
8.4
Very good
1,131 reviews

Comfort

8.3

Entertainment

8.2

Boarding

8.5

Food

8.1

Crew

8.7

Overall

8.4

Reviews

1 / 20
10.0
Excellent

Chris,Mar 2025

SEA - ICN

Was told the flight was overbooked so they selected only a few people to weight their bags and we were forced to check our luggage. We Once we got seated on the flight there were many seats vacant and our overhead bin was completely open. Both our luggage and our carryon were small. We had booked our tickets months in advance and we watched people carry two small suitcases on without one word to them. Am I upset?? Yes it was disappointing.

Related info for your journey

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

    For a flight from St. Louis to Incheon Intl, you will be flying from Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city. Lambert-St Louis is the only St. Louis airport and it handles 0 outbound flights to Incheon Intl per day. 5 airlines have flights to Incheon Intl from Lambert-St Louis on a regular basis.

  • How long is the flight from St. Louis to Incheon Intl Airport?

    A quick flight from St. Louis to Incheon Intl Airport can take about 22h 05m. Hawaiian Airlines provides one of the quickest options available for as low as $857. The distance between St. Louis and Incheon Intl Airport is about 6670 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Air Canada, at $799, was found to be the cheapest airline from St. Louis to Incheon Intl Airport.Alternate airlines to your destination round-trip include Delta and United Airlines. Users have found that Air Canada is 35% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from St. Louis to Incheon Intl Airport (average of $992). Flying from St. Louis to Incheon Intl Airport in December is currently the most expensive (average of $1,635). 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
Suwon
Seongnam
Daejeon

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Alternative routes for St. Louis to Incheon Intl

See prices for flight routes from nearby airports that may be better suited for you.
Kansas City to Incheon Intl flights
Springfield to Incheon Intl flights
St. Louis to Gimpo Intl flights

Top 5 airlines flying from St. Louis to Incheon Intl

Discover the top 5 airlines that operate flights from St. Louis to Incheon Intl. 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 August 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,081FlexibilityNo cancel feeOn-time67%
DeltaCheapest$877Average$1,385FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,373FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$977Average$1,846FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,866FlexibilityNo cancel feeOn-time81%

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