What airlines fly to Illinois?

Korean Air, Delta and United Airlines 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 38% 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.

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

Japan Airlines, American Airlines, and Delta are the most popular carriers operating from Seoul to Illinois

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

The number of flights available between Seoul and Illinois is 2 per day as of March 2026. 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?

14 flights are operational weekly from Seoul to Illinois as of March 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.

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 17h.

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 7 operators available for flights from Seoul to Illinois as of March 2026.

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.

$440 Cheap Flights from Seoul to Illinois in 2026

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Find the cheapest flights from Seoul to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:45 pm - 2:48 pm

ICN

ORD

35h 03m

1 stop

9:04 am - 5:30 pm

ORD

ICN

18h 26m

1 stop

$840Air Canada

Mon, Sep 14 - Thu, Sep 24

5:45 pm - 2:48 pm

ICN

ORD

35h 03m

1 stop

7:09 am - 5:30 pm

ORD

ICN

20h 21m

1 stop

$841Air Canada

Mon, Sep 14 - Thu, Sep 24

9:20 pm - 1:15 am

ICN

ORD

17h 55m

1 stop

6:10 pm - 5:00 am

ORD

ICN

20h 50m

1 stop

$849Asiana Airlines

Tue, Jun 2 - Tue, Jun 30

9:20 pm - 1:15 am

ICN

ORD

17h 55m

1 stop

5:57 pm - 5:00 am

ORD

ICN

21h 03m

1 stop

$854Asiana Airlines

Tue, Jun 9 - Tue, Sep 1

4:50 pm - 11:57 pm

ICN

MLI

21h 07m

2 stops

8:00 am - 4:20 am

MLI

ICN

30h 20m

2 stops

$1,013United Airlines

Thu, Apr 23 - Mon, Apr 27

11:30 am - 11:57 pm

ICN

MLI

26h 27m

2 stops

10:35 am - 4:20 am

MLI

ICN

27h 45m

2 stops

$1,032United Airlines

Thu, Apr 23 - Mon, Apr 27

7:40 pm - 11:21 pm

ICN

STL

17h 41m

1 stop

6:21 am - 4:50 pm

STL

ICN

20h 29m

2 stops

$1,070Korean Air

Mon, May 25 - Sun, May 31

7:20 pm - 12:30 am

ICN

STL

19h 10m

1 stop

8:53 am - 5:20 pm

STL

ICN

18h 27m

1 stop

$1,121Korean Air

Thu, May 7 - Thu, May 14

7:40 pm - 1:11 pm

ICN

MDW

31h 31m

1 stop

5:59 pm - 5:20 pm

MDW

ICN

33h 21m

2 stops

$1,133Delta

Mon, Sep 14 - Sat, Sep 26

7:40 pm - 1:11 pm

ICN

MDW

31h 31m

1 stop

6:45 pm - 5:20 pm

MDW

ICN

32h 35m

1 stop

$1,137Delta

Mon, Sep 14 - Sat, Sep 26

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets

Japan Airlines

Apr 22

GMP7:15 pmSeoul Gimpo Intl

29h 30m

1 stop

ORD10:45 amChicago O'Hare Intl

Sep 29

ORD2:10 pmChicago O'Hare Intl

37h 45m

1 stop

GMP5:55 pmSeoul Gimpo Intl

$1,209

Japan Airlines

May 15

GMP8:00 amSeoul Gimpo Intl

17h 00m

1 stop

ORD11:00 amChicago O'Hare Intl

Jun 5

ORD2:30 pmChicago O'Hare Intl

16h 45m

1 stop

GMP9:15 pmSeoul Gimpo Intl

$1,214

Japan Airlines

May 11

GMP8:00 amSeoul Gimpo Intl

26h 12m

2 stops

ORD8:12 pmChicago O'Hare Intl

May 17

ORD8:57 amChicago O'Hare Intl

35h 43m

2 stops

GMP10:40 amSeoul Gimpo Intl

$1,221

Air Canada flights from Seoul to Illinois

Our best Air Canada deals on Seoul to Illinois flight tickets

Air Canada

Sep 14

ICN5:45 pmIncheon Intl

35h 03m

1 stop

ORD2:48 pmChicago O'Hare Intl

Sep 24

ORD9:04 amChicago O'Hare Intl

18h 26m

1 stop

ICN5:30 pmIncheon Intl

$840

Air Canada

Sep 14

ICN5:45 pmIncheon Intl

35h 03m

1 stop

ORD2:48 pmChicago O'Hare Intl

Sep 24

ORD7:09 amChicago O'Hare Intl

20h 21m

1 stop

ICN5:30 pmIncheon Intl

$841

Air Canada

Sep 14

ICN5:45 pmIncheon Intl

35h 03m

1 stop

ORD2:48 pmChicago O'Hare Intl

Sep 17

ORD7:09 amChicago O'Hare Intl

20h 21m

1 stop

ICN5:30 pmIncheon Intl

$843

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 9/14

5:45 pm-2:48 pm

1 stop35h 03m

Chicago O'Hare Intl

Thu 9/24

9:04 am-5:30 pm

1 stop18h 26m

$840

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 9/14

5:45 pm-2:48 pm

1 stop35h 03m

Chicago O'Hare Intl

Thu 9/24

7:09 am-5:30 pm

1 stop20h 21m

$841

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 6/2

9:20 pm-1:15 am

1 stop17h 55m

Chicago O'Hare Intl

Tue 6/30

6:10 pm-5:00 am

1 stop20h 50m

$849

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 6/9

9:20 pm-1:15 am

1 stop17h 55m

Chicago O'Hare Intl

Tue 9/1

5:57 pm-5:00 am

1 stop21h 03m

$854

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Thu 4/23

4:50 pm-11:57 pm

2 stops21h 07m

Moline Quad-City

Mon 4/27

8:00 am-4:20 am

2 stops30h 20m

$1,013

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Thu 4/23

11:30 am-11:57 pm

2 stops26h 27m

Moline Quad-City

Mon 4/27

10:35 am-4:20 am

2 stops27h 45m

$1,032

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 5/25

7:40 pm-11:21 pm

1 stop17h 41m

Lambert-St Louis

Sun 5/31

6:21 am-4:50 pm

2 stops20h 29m

$1,070

Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 5/7

7:20 pm-12:30 am

1 stop19h 10m

Lambert-St Louis

Thu 5/14

8:53 am-5:20 pm

1 stop18h 27m

$1,121

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 9/14

7:40 pm-1:11 pm

1 stop31h 31m

Chicago Midway

Sat 9/26

5:59 pm-5:20 pm

2 stops33h 21m

$1,133

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 9/14

7:40 pm-1:11 pm

1 stop31h 31m

Chicago Midway

Sat 9/26

6:45 pm-5:20 pm

1 stop32h 35m

$1,137

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 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 November. Flight prices, which tend to average around $594, 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 November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $742.

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

The cheapest day to depart from Seoul to Illinois is on a Sunday when prices can be found for as low as $1,334. Flights from Seoul to Illinois on a Friday will generally be more expensive and average around $1,622. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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 $1,205 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 $816 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?

No. A direct flight is the cheapest option for a flight between 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	$1,077
Fastest flight time	12h 50m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Illinois	98 airports

The best one-way flight to Illinois from Seoul in the past 72 hours is $1,077. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,260.

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

Direct flights go from Seoul to Illinois on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. The only airline offering direct flights is Korean Air.

There are 98 airports in Illinois. From Seoul there are direct flights to 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 7 operators available for flights from Seoul to Illinois as of March 2026.
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 90.81% of the total bookings. Other popular models include Airbus A380-800 with 3.24%, Boeing 787-9 Dreamliner with 2.70%, and Airbus A350-900 with 2.16%.

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
Alaska Airlines	PriceFrom $197	Free Cancellation	Rating 7.9 12,104 reviews	Search Alaska Airlines flights
Delta	PriceFrom $229	Free Cancellation	Rating 7.9 8,324 reviews	Search Delta flights
Asiana Airlines	PriceFrom $558	Free Cancellation	Rating 8.1 506 reviews	Search Asiana Airlines flights
United Airlines	PriceFrom $586	Free Cancellation	Rating 7.4 9,471 reviews	Search United Airlines flights
Air Canada	PriceFrom $635	Free Cancellation	Rating 7.1 10,837 reviews	Search Air Canada flights
Korean Air	PriceFrom $658	Free Cancellation	Rating 8.4 1,202 reviews	Search Korean Air 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.

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Flights to New Yorkfrom $66

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Flights to San Franciscofrom $77

Flights to Las Vegasfrom $41

Flights to Washington, D.C.from $59

Flights to Bostonfrom $65

Flights to Atlantafrom $53

Flights to Dallasfrom $62

Flights to Seattlefrom $104

Cheap flights from Seoul to Illinois from $440

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 8/25. 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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Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets

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How to get the cheapest flight ticket from Seoul to Illinois

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 Seoul to Illinois flight route?

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

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

Can stopping save me money on Seoul to Illinois flights?

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

What airlines fly to Illinois?

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

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

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

Best airlines flying from Seoul to Illinois

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

Why use momondo?

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

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