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Incheon Intl

$438+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ICN
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 March, 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 julio 3, 2025.

Round-trip from

$847
(American Airlines)

One-way from

$438
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,846
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, 3% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($53 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/3. 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. 9/17:59 pmSTL - ICN
2 stops29h 31mAmerican Airlines
sáb. 9/205:25 pmICN - STL
1 stop16h 50mAmerican Airlines
Deal found 7/3$847
This United Airlines deal was found by Cheapflights users on 7/3. 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. 9/15:15 amSTL - ICN
2 stops19h 45mUnited Airlines
sáb. 9/2011:30 amICN - STL
2 stops23h 16mUnited Airlines
Deal found 7/3$857
This Delta deal was found by Cheapflights users on 7/2. 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.
lun. 9/16:00 amSTL - ICN
2 stops20h 30mDelta
sáb. 9/2010:15 amICN - STL
2 stops22h 50mDelta
Deal found 7/2$861
This Air Canada deal was found by Cheapflights users on 7/2. 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.
mié. 7/164:00 pmSTL - ICN
2 stops34h 05mAir Canada
lun. 10/137:05 pmICN - STL
1 stop38h 33mAir Canada
Deal found 7/2$1,102
This Travelocity deal was found by Cheapflights users on 7/1. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/94:00 pmSTL - ICN
1 stop35h 30mMultiple Airlines
lun. 7/1410:35 amICN - STL
2 stops24h 15mMultiple Airlines
Deal found 7/1$1,125

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 julio 3, 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

lun. 9/1

7:59 pm-3:30 pm

2 stops29h 31m

Incheon Intl

sáb. 9/20

5:25 pm-8:15 pm

1 stop16h 50m

$847

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

lun. 9/1

5:15 am-3:00 pm

2 stops19h 45m

Incheon Intl

sáb. 9/20

11:30 am-8:46 pm

2 stops23h 16m

$857

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

lun. 9/1

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

sáb. 9/20

10:15 am-7:05 pm

2 stops22h 50m

$861

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mié. 7/16

4:00 pm-4:05 pm

2 stops34h 05m

Incheon Intl

lun. 10/13

7:05 pm-7:38 pm

1 stop38h 33m

$1,102

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mar. 7/15

6:41 am-5:55 pm

1 stop21h 14m

Incheon Intl

vie. 7/18

8:55 pm-4:54 am

1 stop21h 59m

$1,198

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

lun. 8/18

7:29 pm-9:35 pm

3 stops36h 06m

$438

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 8/17

3:40 pm-4:00 am

1 stop22h 20m

$481

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mar. 10/14

6:05 pm-3:30 pm

1 stop31h 25m

$487

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 11/30

4:05 pm-5:10 pm

2 stops34h 05m

$603

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 11/30

6:30 am-3:30 pm

1 stop18h 00m

$672

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

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 June 27, 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 $998). 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 julio 3, 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.

How much does it cost to fly round-trip from St. Louis to Incheon Intl Airport?

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 julio 3, 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
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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
1,101 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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
7,982 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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
8,861 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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
9,681 reviews
Korean Air
8.4
Very good
1,101 reviews

Comfort

8.3

Crew

8.7

Boarding

8.5

Overall

8.4

Entertainment

8.2

Food

8.1

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.

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

    American Airlines, at $847, was found to be the cheapest airline from St. Louis to Incheon Intl Airport.Alternate airlines to your destination round-trip include United Airlines and Delta. Users have found that American Airlines is 34% cheaper than the other options available to this destination.

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

    $481 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on American Airlines and Air Canada, with prices starting from $487 and $603, respectively.

  • 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 $998). 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 St. Louis?

Book flights to St. Louis 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.
St. Louis to Gimpo Intl flights
Kansas City to Incheon Intl flights
Springfield to Incheon 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$799Average$1,087FlexibilityNo cancel feeOn-time67%
DeltaCheapest$902Average$1,452FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$902Average$1,498FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$996Average$1,845FlexibilityNo cancel feeOn-time71%
Korean AirCheapest$1,080Average$1,752FlexibilityNo cancel feeOn-time81%

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