How long is the flight from Illinois to South Korea?

The flight from Illinois to South Korea depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Chicago (a popular airport in Illinois) to Incheon Intl Airport (the most popular airport in South Korea), then the flight time is 15h 42m on average. If you fly from Moline (another popular airport in Illinois) to Incheon Intl Airport, then the average flight time is 29h 48m.

What airlines fly to South Korea?

Korean Air, Air Canada and Delta are the top three most popular airlines that fly to South Korea from Illinois according to our data. Korean Air is the first choice among our users, with 52% of people opting to fly with this airline when traveling to South Korea. Keep in mind that there are 9 different airlines that fly to South Korea on a routine basis, so you have a few additional options to choose from.

How many flights depart from Illinois to South Korea on average per week?

12 flights are operational weekly from Illinois to South Korea as of October 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

What is the cheapest airline that flies from Illinois to South Korea?

Hawaiian Airlines, Air Canada, and American Airlines are the most popular carriers operating from Illinois to South Korea

How many flights depart from Illinois to South Korea on average per day?

1 flights are operational daily from Illinois to South Korea as of October 2025. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

When did momondo last update prices for flights from Illinois to South Korea?

Prices for flights from Illinois to South Korea were last updated today.

How many operators does momondo search for flights from Illinois to South Korea?

As of October 2025, there are 9 operators available to choose from for flights from Illinois to South Korea.

How old do you have to be to fly from Illinois to South Korea?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to South Korea.

What documentation or ID do you need to fly to South Korea?

The travel and health documents you'll need for your trip to South Korea may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at South Korea. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$370 Cheap Flights from Illinois to South Korea in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

4:05 pm - 5:10 pmSTL-ICN

34h 05m2 stops

8:10 pm - 3:29 pmICN-STL

34h 19m1 stop

$776Air Canada

Find Deal

Sat, Nov 15 - Sat, Nov 22

4:05 pm - 5:10 pmSTL-ICN

34h 05m2 stops

6:55 pm - 3:29 pmICN-STL

35h 34m2 stops

$778Air Canada

Find Deal

Thu, Dec 4 - Thu, Dec 11

10:00 am - 12:20 pmORD-ICN

35h 20m3 stops

1:20 pm - 6:25 amICN-ORD

32h 05m2 stops

$810Multiple Airlines

Find Deal

Tue, Nov 18 - Tue, Nov 25

7:58 pm - 4:45 pmSTL-ICN

29h 47m2 stops

7:15 pm - 12:37 pmICN-STL

32h 22m1 stop

$834American Airlines

Find Deal

Mon, Nov 10 - Thu, Nov 27

7:58 pm - 4:45 pmSTL-ICN

29h 47m2 stops

7:15 pm - 1:17 pmICN-STL

33h 02m2 stops

$836American Airlines

Find Deal

Mon, Nov 10 - Thu, Nov 27

11:50 am - 9:05 amORD-ICN

30h 15m1 stop

12:10 am - 10:05 amICN-ORD

24h 55m1 stop

$844Turkish Airlines

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Sat, Jan 17 - Sat, Jan 31

6:42 pm - 4:15 pmSTL-ICN

30h 33m2 stops

6:00 pm - 2:26 pmICN-STL

35h 26m2 stops

$851United Airlines

Find Deal

Tue, Dec 9 - Mon, Dec 29

12:50 pm - 6:20 pmORD-ICN

39h 30m1 stop

11:20 pm - 9:40 amICN-ORD

24h 20m1 stop

$853Turkish Airlines

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Fri, Mar 20 - Sun, Apr 5

5:30 pm - 4:15 pmSTL-ICN

31h 45m1 stop

6:00 pm - 10:30 pmICN-STL

19h 30m1 stop

$853United Airlines

Find Deal

Tue, Dec 9 - Fri, Dec 26

10:00 am - 12:20 pmORD-ICN

35h 20m3 stops

1:20 pm - 5:32 amICN-ORD

31h 12m3 stops

$863Multiple Airlines

Find Deal

Tue, Nov 18 - Tue, Nov 25

Air Canada flights from Illinois to South Korea

Our best Air Canada deals on Illinois to South Korea flight tickets

Air Canada

Nov 15

STL4:05 pmLambert-St Louis

34h 05m

2 stops

ICN5:10 pmIncheon Intl

Nov 22

ICN8:10 pmIncheon Intl

34h 19m

1 stop

STL3:29 pmLambert-St Louis

$776

Find similar

Air Canada

Dec 4

STL4:05 pmLambert-St Louis

34h 05m

2 stops

ICN5:10 pmIncheon Intl

Dec 11

ICN6:55 pmIncheon Intl

35h 34m

2 stops

STL3:29 pmLambert-St Louis

$778

Find similar

Air Canada

Nov 18

STL4:05 pmLambert-St Louis

34h 05m

2 stops

ICN5:10 pmIncheon Intl

Nov 25

ICN8:10 pmIncheon Intl

34h 19m

1 stop

STL3:29 pmLambert-St Louis

$787

Find similar

Alaska Airlines flights from Illinois to South Korea

Our best Alaska Airlines deals on Illinois to South Korea flight tickets

Alaska Airlines

Nov 5

STL7:00 amLambert-St Louis

20h 35m

1 stop

ICN6:35 pmIncheon Intl

Nov 21

ICN8:35 pmIncheon Intl

18h 19m

1 stop

STL11:54 pmLambert-St Louis

$834

Find similar

Alaska Airlines

Mar 20

STL7:00 amLambert-St Louis

21h 35m

1 stop

ICN6:35 pmIncheon Intl

Mar 29

ICN8:35 pmIncheon Intl

17h 20m

1 stop

STL11:55 pmLambert-St Louis

$990

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Sat 11/15

4:05 pm-5:10 pm

2 stops34h 05m

Incheon Intl

Sat 11/22

8:10 pm-3:29 pm

1 stop34h 19m

$776

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Thu 12/4

4:05 pm-5:10 pm

2 stops34h 05m

Incheon Intl

Thu 12/11

6:55 pm-3:29 pm

2 stops35h 34m

$778

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 11/18

10:00 am-12:20 pm

3 stops35h 20m

Incheon Intl

Tue 11/25

1:20 pm-6:25 am

2 stops32h 05m

$810

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

7:58 pm-4:45 pm

2 stops29h 47m

Incheon Intl

Thu 11/27

7:15 pm-12:37 pm

1 stop32h 22m

$834

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Mon 11/10

7:58 pm-4:45 pm

2 stops29h 47m

Incheon Intl

Thu 11/27

7:15 pm-1:17 pm

2 stops33h 02m

$836

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Sat 1/17

11:50 am-9:05 am

1 stop30h 15m

Incheon Intl

Sat 1/31

12:10 am-10:05 am

1 stop24h 55m

$844

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 12/9

6:42 pm-4:15 pm

2 stops30h 33m

Incheon Intl

Mon 12/29

6:00 pm-2:26 pm

2 stops35h 26m

$851

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Fri 3/20

12:50 pm-6:20 pm

1 stop39h 30m

Incheon Intl

Sun 4/5

11:20 pm-9:40 am

1 stop24h 20m

$853

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

Tue 12/9

5:30 pm-4:15 pm

1 stop31h 45m

Incheon Intl

Fri 12/26

6:00 pm-10:30 pm

1 stop19h 30m

$853

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

Tue 11/18

10:00 am-12:20 pm

3 stops35h 20m

Incheon Intl

Tue 11/25

1:20 pm-5:32 am

3 stops31h 12m

$863

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How to get the cheapest flight ticket from Illinois to South Korea

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

Other information

What is the cheapest month to fly to South Korea?

If you aren’t able to travel to South Korea during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,043.

What is the cheapest day to depart on your flight to South Korea?

On average, the least expensive day to fly to South Korea from Illinois is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $1,005. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to South Korea for around $1,295.

What is the cheapest time of day to depart on your flight to South Korea?

Flying to South Korea from Illinois in the morning is the least expensive time of day to depart. momondo users have found prices as low as $1,123 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,432 on average. Flights to South Korea from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to South Korea flight route?

Fly from Chicago O'Hare Intl to Incheon Intl for the best Illinois - South Korea flight prices

How far in advance should I book a flight to South Korea?

You are more likely to see cheaper flights to South Korea from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to South Korea for around $1,518 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to South Korea from Illinois for as low as $1,384 on momondo.

What cabin class options are available on Illinois to South Korea flights?

There are 4 cabin classes available to choose from on Illinois to South Korea flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to South Korea flights?

You could potentially save up to 20% on your flight if you consider stops on a Illinois to South Korea flight.

Cheap Illinois to South Korea flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to South Korea

Best Price Found	$560
Fastest flight time	14h 50m
Direct flights	Every day
Airports in South Korea	1 airport

The best one-way flight to South Korea from Illinois in the past 72 hours is $560. The best round-trip flight deal from Illinois to South Korea found on momondo in the last 72 hours is $751.

The fastest flight from Illinois to South Korea takes 14h 50m

Direct flights go from Illinois to South Korea every day.

There is 1 airport near South Korea: Incheon Intl (ICN)

Search flight deals

When did momondo last update prices for flights from Illinois to South Korea?
Prices for flights from Illinois to South Korea were last updated today.
How many operators does momondo search for flights from Illinois to South Korea?
As of October 2025, there are 9 operators available to choose from for flights from Illinois to South Korea.
How old do you have to be to fly from Illinois to South Korea?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to South Korea.
What documentation or ID do you need to fly to South Korea?
The travel and health documents you'll need for your trip to South Korea may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at South Korea. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to South Korea?
momondo data reveals that the most frequently booked plane model on the route from Illinois to South Korea is Boeing 777-300ER, representing 91.39% of all bookings. The subsequent popular models are Boeing 787-10 Dreamliner at 1.94%, Airbus A350-1000 at 1.67%, and Boeing 777-300 at 1.39%.

Best airlines flying from Illinois to South Korea

Compare and see reviews for airlines that fly from Illinois to South Korea with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $196	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights
United Airlines	PriceFrom $287	Free Cancellation	Rating 7.4 8,990 reviews	Search United Airlines flights
Cathay Pacific	PriceFrom $639	Free Cancellation	Rating 7.6 1,036 reviews	Search Cathay Pacific flights
Turkish Airlines	PriceFrom $848	Free Cancellation	Rating 7.3 4,022 reviews	Search Turkish Airlines flights
American Airlines	PriceFrom $926	Free Cancellation	Rating 7.2 11,028 reviews	Search American Airlines flights
EVA Air	PriceFrom $1,015	Free Cancellation	Rating 8.4 1,254 reviews	Search EVA Air flights
Air Canada	PriceFrom $1,034	Free Cancellation	Rating 7.1 10,344 reviews	Search Air Canada flights
Finnair	PriceFrom $1,110	Free Cancellation	Rating 7.6 1,333 reviews	Search Finnair flights
Korean Air	PriceFrom $1,500	Free Cancellation	Rating 8.4 1,153 reviews	Search Korean Air flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to South Korea?

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

Can I find flights from Illinois to South Korea with flexible booking policies on momondo?

momondo does allow users to show only those flights to South Korea from Illinois which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Illinois to South Korea?

momondo helps you find the best flight between Illinois and South Korea by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Illinois to South Korea right now. Can momondo alert me if prices change?

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

An easier way to manage your South Korea 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.

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Popular cities in South Korea

Flights to Seoulfrom $560

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Flights to Gwangjufrom $3,408

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Cheap flights from Illinois to South Korea from $370

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to South Korea departing on 2/6. 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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Big names and deals

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Find the cheapest flights from Illinois to South Korea

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Air Canada flights from Illinois to South Korea

Our best Air Canada deals on Illinois to South Korea flight tickets

Alaska Airlines flights from Illinois to South Korea

Our best Alaska Airlines deals on Illinois to South Korea flight tickets

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How to get the cheapest flight ticket from Illinois to South Korea

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

What is the cheapest month to fly to South Korea?

If you aren’t able to travel to South Korea during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $1,043.

What is the cheapest day to depart on your flight to South Korea?

What is the cheapest time of day to depart on your flight to South Korea?

What is the cheapest Illinois to South Korea flight route?

Fly from Chicago O'Hare Intl to Incheon Intl for the best Illinois - South Korea flight prices

How far in advance should I book a flight to South Korea?

What cabin class options are available on Illinois to South Korea flights?

There are 4 cabin classes available to choose from on Illinois to South Korea flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to South Korea flights?

You could potentially save up to 20% on your flight if you consider stops on a Illinois to South Korea flight.

What is the cheapest airline that flies from Illinois to South Korea?

Hawaiian Airlines, Air Canada, and American Airlines are the most popular carriers operating from Illinois to South Korea

What airlines fly to South Korea?

How many flights depart from Illinois to South Korea on average per day?

1 flights are operational daily from Illinois to South Korea as of October 2025. The most popular departure time for this route is 12:00PM, with 100% of flights per day taking off in the afternoon.

How many flights depart from Illinois to South Korea on average per week?

12 flights are operational weekly from Illinois to South Korea as of October 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

How long is the flight from Illinois to South Korea?

Cheap Illinois to South Korea flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to South Korea

Best Price Found

Fastest flight time

Direct flights

Airports in South Korea

When did momondo last update prices for flights from Illinois to South Korea?

How many operators does momondo search for flights from Illinois to South Korea?

How old do you have to be to fly from Illinois to South Korea?

What documentation or ID do you need to fly to South Korea?

What is the most popular plane model from Illinois to South Korea?

Best airlines flying from Illinois to South Korea

Compare and see reviews for airlines that fly from Illinois to South Korea with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to South Korea?

Can I find flights from Illinois to South Korea with flexible booking policies on momondo?

How can momondo help me find flights from Illinois to South Korea?

I’m not ready to book a flight from Illinois to South Korea right now. Can momondo alert me if prices change?

An easier way to manage your South Korea 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 South Korea

Popular cities in South Korea

Popular flights according to clicks in the last 7 days on momondo