What airlines fly to Illinois?

Korean Air, Delta and Air Canada are the top three most popular airlines that fly to Illinois from Seoul according to our data. Korean Air is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 6 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

How long is the flight from Seoul to Illinois?

The flight from Seoul to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Incheon (a popular airport in Seoul) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 12h 50m on average. If you fly from Seoul (another popular airport in Seoul) to Chicago O'Hare Intl Airport, then the average flight time is 14h 35m.

What is the cheapest airline that flies from Seoul to Illinois?

Air Canada and WestJet are the most popular carriers operating from Seoul to Illinois

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

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

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

The number of flights available between Seoul and Illinois is 1 per day as of August 2025. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.

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

Prices for flights from Seoul to Illinois were last updated today.

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

There are 6 operators available for flights from Seoul to Illinois as of August 2025.

How old do you have to be to fly from Seoul to Illinois?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seoul to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$392 Cheap Flights from Seoul to Illinois in 2025

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Find the cheapest flights from Seoul to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

8:35 pm - 11:59 pmICN-ORD

17h 24m1 stop

10:05 am - 6:35 pmORD-ICN

18h 30m1 stop

$560Hawaiian Airlines

Find Deal

Sun, Oct 12 - Wed, Oct 22

5:45 pm - 9:14 pmICN-ORD

17h 29m1 stop

10:34 pm - 3:30 pmORD-ICN

26h 56m2 stops

$561American Airlines

Find Deal

Thu, Oct 16 - Tue, Oct 21

6:00 pm - 11:23 amICN-ORD

31h 23m1 stop

7:11 am - 4:15 pmORD-ICN

19h 04m1 stop

$598Air Canada

Find Deal

Fri, Sep 12 - Tue, Sep 16

6:00 pm - 9:48 amICN-ORD

29h 48m1 stop

7:11 am - 4:15 pmORD-ICN

19h 04m1 stop

$599Air Canada

Find Deal

Fri, Sep 12 - Tue, Sep 16

6:00 pm - 3:05 pmICN-MLI

36h 05m2 stops

8:50 am - 5:40 amMLI-ICN

29h 50m2 stops

$601United Airlines

Find Deal

Fri, Feb 6 - Tue, Feb 10

4:50 pm - 9:32 pmICN-ORD

18h 42m2 stops

12:50 pm - 4:20 amORD-ICN

25h 30m2 stops

$601United Airlines

Find Deal

Mon, Sep 15 - Tue, Sep 30

7:30 pm - 9:37 amICN-STL

28h 07m2 stops

7:40 pm - 4:30 pmSTL-ICN

29h 50m2 stops

$638Delta

Find Deal

Fri, Oct 31 - Sun, Nov 2

4:40 pm - 12:38 amICN-STL

21h 58m2 stops

6:00 am - 4:40 pmSTL-ICN

20h 40m2 stops

$708Delta

Find Deal

Mon, Sep 15 - Tue, Oct 14

6:40 pm - 11:07 pmICN-STL

18h 27m1 stop

5:00 am - 2:30 pmSTL-ICN

18h 30m1 stop

$710Korean Air

Find Deal

Fri, Oct 17 - Sun, Nov 2

7:30 pm - 11:02 pmICN-STL

18h 32m1 stop

6:30 am - 3:30 pmSTL-ICN

18h 00m1 stop

$758Korean Air

Find Deal

Sun, Dec 14 - Wed, Jan 7

British Airways flights from Seoul to Illinois

Our best British Airways deals on Seoul to Illinois flight tickets

British Airways

Sep 11

ICN5:25 pmIncheon Intl

27h 41m

2 stops

ORD7:06 amChicago O'Hare Intl

Sep 24

ORD6:00 amChicago O'Hare Intl

19h 30m

1 stop

ICN3:30 pmIncheon Intl

$573

Find similar

British Airways

Sep 11

ICN5:25 pmIncheon Intl

20h 27m

1 stop

ORD11:52 pmChicago O'Hare Intl

Sep 24

ORD8:25 amChicago O'Hare Intl

41h 05m

1 stop

ICN3:30 pmIncheon Intl

$576

Find similar

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets

Japan Airlines

Sep 11

GMP7:55 amSeoul Gimpo Intl

15h 10m

1 stop

ORD9:05 amChicago O'Hare Intl

Sep 23

ORD1:05 amChicago O'Hare Intl

30h 45m

1 stop

GMP9:50 pmSeoul Gimpo Intl

$830

Find similar

Japan Airlines

Sep 19

GMP7:55 amSeoul Gimpo Intl

15h 10m

1 stop

ORD9:05 amChicago O'Hare Intl

Sep 22

ORD1:05 amChicago O'Hare Intl

30h 45m

1 stop

GMP9:50 pmSeoul Gimpo Intl

$837

Find similar

Japan Airlines

Sep 11

GMP7:55 amSeoul Gimpo Intl

15h 10m

1 stop

ORD9:05 amChicago O'Hare Intl

Oct 1

ORD1:05 amChicago O'Hare Intl

30h 45m

1 stop

GMP9:50 pmSeoul Gimpo Intl

$845

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Sun 10/12

8:35 pm-11:59 pm

1 stop17h 24m

Chicago O'Hare Intl

Wed 10/22

10:05 am-6:35 pm

1 stop18h 30m

$560

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 10/16

5:45 pm-9:14 pm

1 stop17h 29m

Chicago O'Hare Intl

Tue 10/21

10:34 pm-3:30 pm

2 stops26h 56m

$561

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 9/12

6:00 pm-11:23 am

1 stop31h 23m

Chicago O'Hare Intl

Tue 9/16

7:11 am-4:15 pm

1 stop19h 04m

$598

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 9/12

6:00 pm-9:48 am

1 stop29h 48m

Chicago O'Hare Intl

Tue 9/16

7:11 am-4:15 pm

1 stop19h 04m

$599

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Fri 2/6

6:00 pm-3:05 pm

2 stops36h 05m

Moline Quad-City

Tue 2/10

8:50 am-5:40 am

2 stops29h 50m

$601

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 9/15

4:50 pm-9:32 pm

2 stops18h 42m

Chicago O'Hare Intl

Tue 9/30

12:50 pm-4:20 am

2 stops25h 30m

$601

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 10/31

7:30 pm-9:37 am

2 stops28h 07m

Lambert-St Louis

Sun 11/2

7:40 pm-4:30 pm

2 stops29h 50m

$638

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 9/15

4:40 pm-12:38 am

2 stops21h 58m

Lambert-St Louis

Tue 10/14

6:00 am-4:40 pm

2 stops20h 40m

$708

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Fri 10/17

6:40 pm-11:07 pm

1 stop18h 27m

Lambert-St Louis

Sun 11/2

5:00 am-2:30 pm

1 stop18h 30m

$710

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Sun 12/14

7:30 pm-11:02 pm

1 stop18h 32m

Lambert-St Louis

Wed 1/7

6:30 am-3:30 pm

1 stop18h 00m

$758

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Seoul to Illinois

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 Illinois?

The cheapest month to fly to Illinois from Seoul is in February. Flight prices, which tend to average around $868, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $868.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Seoul to Illinois is on a Monday when prices can be found for as low as $1,348. Flights from Seoul to Illinois on a Wednesday will generally be more expensive and average around $1,536. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Seoul to Illinois during this time can be as low as $1,098. Flights in the evening are often more expensive with an average ticket price of $1,995.

What is the cheapest Seoul to Illinois flight route?

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

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Seoul when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $1,314 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Seoul for as low as $1,051 on momondo.

What cabin class options are available on Seoul to Illinois flights?

There are 4 cabin classes available to choose from on Seoul to Illinois 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 Seoul to Illinois flights?

You could potentially save up to 30% on your flight if you consider stops on a Seoul to Illinois flight.

Cheap Seoul to Illinois flight deals and tips

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

Best Price Found	$1,112
Fastest flight time	12h 50m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Seoul in the past 72 hours is $1,112. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,288.

The fastest flight from Seoul to Illinois takes 12h 50m

Direct flights go from Seoul to Illinois every day.

There is 1 airport near Illinois: Chicago O'Hare Intl (ORD)

Search flight deals

When did momondo last update prices for flights from Seoul to Illinois?
Prices for flights from Seoul to Illinois were last updated today.
How many operators does momondo search for flights from Seoul to Illinois?
There are 6 operators available for flights from Seoul to Illinois as of August 2025.
How old do you have to be to fly from Seoul to Illinois?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seoul to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seoul to Illinois?
Based on momondo bookings for flights between Seoul and Illinois, the leading plane model is Boeing 777-300ER, making up 87.71% of the total bookings. Other popular models include Airbus A350-900 with 4.29%, Airbus A380-800 with 3.71%, and Boeing 787-9 Dreamliner with 3.14%.

Best airlines flying from Seoul to Illinois

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $229	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights
Asiana Airlines	PriceFrom $558	Free Cancellation	Rating 8.2 475 reviews	Search Asiana Airlines flights
Air Canada	PriceFrom $730	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
American Airlines	PriceFrom $763	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Korean Air	PriceFrom $857	Free Cancellation	Rating 8.4 1,131 reviews	Search Korean Air flights
United Airlines	PriceFrom $959	Free Cancellation	Rating 7.4 8,930 reviews	Search United Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seoul to Illinois for you.

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

All flight searches from Seoul to Illinois on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seoul to Illinois?

Once all potential Seoul to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes. momondo can track prices for Seoul to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Illinois 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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Find better results for your trip to Illinois

Popular cities in Illinois

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Cheap flights from Seoul to Illinois from $392

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seoul to Illinois departing on 1/13. 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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Filter for what you want

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Find the cheapest flights from Seoul to Illinois

Cheap round-trip flights

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Cheap last minute flights

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British Airways flights from Seoul to Illinois

Our best British Airways deals on Seoul to Illinois flight tickets

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets

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Use the filters below to find and compare flights from Seoul to Illinois that are best for you.

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How to get the cheapest flight ticket from Seoul to Illinois

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 Illinois?

What is the cheapest day to depart on your flight to Illinois?

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Seoul to Illinois during this time can be as low as $1,098. Flights in the evening are often more expensive with an average ticket price of $1,995.

What is the cheapest Seoul to Illinois flight route?

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

How far in advance should I book a flight to Illinois?

What cabin class options are available on Seoul to Illinois flights?

There are 4 cabin classes available to choose from on Seoul to Illinois 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 Seoul to Illinois flights?

You could potentially save up to 30% on your flight if you consider stops on a Seoul to Illinois flight.

What is the cheapest airline that flies from Seoul to Illinois?

Air Canada and WestJet are the most popular carriers operating from Seoul to Illinois

What airlines fly to Illinois?

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

The number of flights available between Seoul and Illinois is 1 per day as of August 2025. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.

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

12 flights are operational weekly from Seoul to Illinois as of August 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 Seoul to Illinois?

Cheap Seoul to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

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

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

How old do you have to be to fly from Seoul to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Seoul to Illinois?

Best airlines flying from Seoul to Illinois

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

Why use momondo?

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

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

How can momondo help me find flights from Seoul to Illinois?

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

An easier way to manage your Illinois 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 Illinois

Popular cities in Illinois

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