What is the cheapest airline that flies from Lambert-St Louis to Incheon Intl?

United Airlines and Delta are the most popular carriers operating from Lambert-St Louis to Incheon Intl

What airlines fly to Incheon Intl Airport?

Delta, Air Canada and American Airlines are the top three most popular airlines that fly to Incheon Intl Airport from St. Louis according to our data. Delta is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Incheon Intl Airport. Keep in mind that there are 4 different airlines that fly to Incheon Intl Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Lambert-St Louis Airport to Incheon Intl Airport?

Prices for flights from Lambert-St Louis Airport to Incheon Intl Airport are refreshed on a daily basis.

How many operators does momondo search for flights from Lambert-St Louis Airport to Incheon Intl Airport?

The number of operators available for flights from Lambert-St Louis Airport to Incheon Intl Airport is 4 as of February 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Incheon Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Incheon Intl Airport.

What documentation or ID do you need to fly to Incheon Intl Airport?

The travel and health documents required for your trip to Incheon Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Incheon Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$368 Cheap Flights from St. Louis to Incheon Intl Airport in 2026

Q: What is the typical price of a round-trip flight between St. Louis and Incheon Intl Airport?

Prices are currently low for flights on this route. Typical prices usually range from $865 to $1,526. The lowest price recently found on this route was $785.

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Find the cheapest flights from St. Louis to Seoul

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 6:35 pm

STL

ICN

20h 35m

1 stop

8:35 pm - 1:51 pm

ICN

STL

31h 16m

1 stop

$785Multiple Airlines

Wed, Mar 4 - Mon, Mar 9

7:02 am - 3:20 pm

STL

ICN

18h 18m

1 stop

7:20 pm - 12:25 am

ICN

STL

19h 05m

1 stop

$867Delta

Wed, Apr 15 - Wed, Apr 22

6:19 am - 4:50 pm

STL

ICN

20h 31m

2 stops

7:20 pm - 12:25 am

ICN

STL

19h 05m

1 stop

$871Delta

Wed, Apr 15 - Wed, Apr 22

5:59 pm - 4:50 pm

STL

ICN

32h 51m

1 stop

6:50 pm - 11:58 pm

ICN

STL

19h 08m

1 stop

$872Delta

Mon, Mar 16 - Tue, Mar 31

5:01 pm - 3:50 pm

STL

ICN

31h 49m

1 stop

7:40 pm - 12:21 am

ICN

STL

18h 41m

1 stop

$873Delta

Sat, Feb 21 - Sun, Mar 8

5:12 am - 3:55 pm

STL

ICN

20h 43m

1 stop

5:55 pm - 11:22 pm

ICN

STL

19h 27m

1 stop

$917American Airlines

Tue, Mar 10 - Tue, Mar 17

6:20 am - 4:50 pm

STL

ICN

20h 30m

2 stops

10:15 am - 5:44 pm

ICN

STL

21h 29m

2 stops

$921Delta

Sat, Apr 25 - Wed, May 6

6:51 am - 4:40 am

STL

ICN

31h 49m

1 stop

5:00 pm - 9:07 pm

ICN

STL

42h 07m

2 stops

$928United Airlines

Mon, Mar 9 - Mon, Mar 16

11:25 am - 4:40 am

STL

ICN

27h 15m

2 stops

5:00 pm - 9:07 pm

ICN

STL

42h 07m

2 stops

$929United Airlines

Mon, Mar 9 - Mon, Mar 16

4:05 pm - 4:15 pm

STL

ICN

34h 10m

2 stops

5:45 pm - 3:24 pm

ICN

STL

35h 39m

2 stops

$949Air Canada

Wed, Mar 25 - Wed, Apr 15

United Airlines flights from St. Louis to Incheon Intl Airport

Our best United Airlines deals on St. Louis to Incheon Intl Airport flight tickets

United Airlines

Feb 16

STL5:25 pmLambert-St Louis

21h 15m

1 stop

ICN5:40 amIncheon Intl

Feb 20

ICN12:45 pmIncheon Intl

18h 59m

1 stop

STL4:44 pmLambert-St Louis

$817

United Airlines

Feb 16

STL1:11 pmLambert-St Louis

25h 29m

2 stops

ICN5:40 amIncheon Intl

Feb 20

ICN12:45 pmIncheon Intl

25h 14m

2 stops

STL10:59 pmLambert-St Louis

$821

United Airlines

Feb 15

STL5:25 pmLambert-St Louis

31h 50m

1 stop

ICN4:15 pmIncheon Intl

Mar 8

ICN11:45 amIncheon Intl

23h 22m

2 stops

STL8:07 pmLambert-St Louis

$828

Delta flights from St. Louis to Incheon Intl Airport

Our best Delta deals on St. Louis to Incheon Intl Airport flight tickets

Delta

Feb 15

STL3:40 pmLambert-St Louis

32h 50m

1 stop

ICN3:30 pmIncheon Intl

Mar 8

ICN7:40 pmIncheon Intl

18h 41m

1 stop

STL12:21 amLambert-St Louis

$822

Delta

Apr 15

STL6:50 pmLambert-St Louis

19h 10m

1 stop

ICN4:00 amIncheon Intl

Apr 22

ICN7:40 pmIncheon Intl

17h 33m

1 stop

STL11:13 pmLambert-St Louis

$867

Delta

Apr 15

STL6:19 amLambert-St Louis

20h 31m

2 stops

ICN4:50 pmIncheon Intl

Apr 22

ICN7:20 pmIncheon Intl

19h 05m

1 stop

STL12:25 amLambert-St Louis

$871

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/4

7:00 am-6:35 pm

1 stop20h 35m

Incheon Intl

Mon 3/9

8:35 pm-1:51 pm

1 stop31h 16m

$785

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

7:02 am-3:20 pm

1 stop18h 18m

Incheon Intl

Wed 4/22

7:20 pm-12:25 am

1 stop19h 05m

$867

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 4/15

6:19 am-4:50 pm

2 stops20h 31m

Incheon Intl

Wed 4/22

7:20 pm-12:25 am

1 stop19h 05m

$871

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 3/16

5:59 pm-4:50 pm

1 stop32h 51m

Incheon Intl

Tue 3/31

6:50 pm-11:58 pm

1 stop19h 08m

$872

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 2/21

5:01 pm-3:50 pm

1 stop31h 49m

Incheon Intl

Sun 3/8

7:40 pm-12:21 am

1 stop18h 41m

$873

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 3/10

5:12 am-3:55 pm

1 stop20h 43m

Incheon Intl

Tue 3/17

5:55 pm-11:22 pm

1 stop19h 27m

$917

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 4/25

6:20 am-4:50 pm

2 stops20h 30m

Incheon Intl

Wed 5/6

10:15 am-5:44 pm

2 stops21h 29m

$921

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 3/9

6:51 am-4:40 am

1 stop31h 49m

Incheon Intl

Mon 3/16

5:00 pm-9:07 pm

2 stops42h 07m

$928

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 3/9

11:25 am-4:40 am

2 stops27h 15m

Incheon Intl

Mon 3/16

5:00 pm-9:07 pm

2 stops42h 07m

$929

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Wed 3/25

4:05 pm-4:15 pm

2 stops34h 10m

Incheon Intl

Wed 4/15

5:45 pm-3:24 pm

2 stops35h 39m

$949

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Incheon Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between St. Louis and Incheon Intl Airport?

What is the cheapest month to fly to Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from St. Louis is in December. Flight prices, which tend to average around $846, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of December, then departing from St. Louis during the month February is also very affordable. Most momondo users find prices during this month for around $865.

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from St. Louis when booking week ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,143 when searching week out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from St. Louis for as low as $907 on momondo.

When to book flights from St. Louis to Incheon Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Incheon Intl Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Incheon Intl Airport (STL to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Incheon Intl Airport

Fastest flight time	18h 18m
Direct flights	None

The fastest flight from St. Louis to Incheon Intl Airport takes 18h 18m

There are no direct flights from St. Louis to Incheon Intl Airport. There are no popular flight routes from St. Louis to Incheon Intl Airport.

Search flight deals

How far is Lambert-St Louis to Incheon Intl by plane?
The straight-line distance from Lambert-St Louis to Incheon Intl is 6682.0 mi. By plane, this route typically takes 18h 18m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Incheon Intl Airport?
Prices for flights from Lambert-St Louis Airport to Incheon Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Incheon Intl Airport?
The number of operators available for flights from Lambert-St Louis Airport to Incheon Intl Airport is 4 as of February 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Incheon Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Incheon Intl Airport.
What documentation or ID do you need to fly to Incheon Intl Airport?
The travel and health documents required for your trip to Incheon Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Incheon Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from St. Louis to Incheon Intl Airport?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Incheon Intl Airport is Delta, representing 52% of all bookings. The subsequent popular airlines are Air Canada at 23%, American Airlines at 13%, and United Airlines at 13%.

Best airlines flying from St. Louis to Incheon Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Incheon Intl Airport with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $846	Free Cancellation	Rating 7.2 11,260 reviews	Search American Airlines flights
Delta	PriceFrom $846	Free Cancellation	Rating 7.9 8,178 reviews	Search Delta flights
United Airlines	PriceFrom $865	Free Cancellation	Rating 7.4 9,267 reviews	Search United Airlines flights
Air Canada	PriceFrom $874	Free Cancellation	Rating 7.1 10,701 reviews	Search Air Canada flights

Suwon

Daejeon

Seongnam

Anyang

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Why should I use momondo to find a flight deal from St. Louis to Seoul?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to Seoul. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for St. Louis to Seoul flights to just show those with flexible booking policies.

How can momondo help me find flights from St. Louis to Seoul?

Once you have performed a search for St. Louis to Seoul flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?

If you are not ready to book a flight from St. Louis to Seoul now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seoul and let you know when they change.

An easier way to manage your Incheon Intl Airport trip

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Flights to Seoul Gimpo Intl Airportfrom $747

Cheap flights from St. Louis to Seoul from $368

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Seoul departing on 2/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from St. Louis to Incheon Intl Airport

Our best United Airlines deals on St. Louis to Incheon Intl Airport flight tickets

Delta flights from St. Louis to Incheon Intl Airport

Our best Delta deals on St. Louis to Incheon Intl Airport flight tickets

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

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How to get the cheapest flight ticket from St. Louis to Incheon Intl Airport

What is the typical price of a round-trip flight between St. Louis and Incheon Intl Airport?

What is the cheapest month to fly to Incheon Intl Airport?

How far in advance should I book a flight to Incheon Intl Airport?

What is the cheapest airline that flies from Lambert-St Louis to Incheon Intl?

What airlines fly to Incheon Intl Airport?

When to book flights from St. Louis to Incheon Intl Airport

Cheap St. Louis to Incheon Intl Airport (STL to ICN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Incheon Intl Airport

Fastest flight time

Direct flights

Best airlines flying from St. Louis to Incheon Intl Airport

Compare and see reviews for airlines that fly from St. Louis to Incheon Intl Airport with momondo

Traveling to a place near Seoul?

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Seoul?

Can I find flights from St. Louis to Seoul with flexible booking policies on momondo?

How can momondo help me find flights from St. Louis to Seoul?

I’m not ready to book a flight from St. Louis to Seoul right now. Can momondo alert me if prices change?

An easier way to manage your Incheon Intl Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Seoul

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According to popular flight searches on momondo this year

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