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

Philippine Airlines, Japan Airlines, and Turkish Airlines are the most popular carriers operating from Seoul to Illinois

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

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

What airlines fly to Illinois?

Korean Air, United Airlines and Delta 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 41% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 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 16h 45m.

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 June 2026. 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 4 operators available for flights from Seoul to Illinois as of June 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.

$424 Cheap Flights from Seoul to Illinois in 2026

Discover deals from 900+ travel sites with momondo.

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.

1:00 pm - 6:17 am

ICN

ORD

31h 17m

1 stop

9:20 am - 4:30 am

ORD

ICN

29h 10m

2 stops

$1,145Multiple Airlines

Tue, Aug 25 - Mon, Aug 31

8:05 pm - 2:20 pm

ICN

ORD

32h 15m

1 stop

5:30 pm - 6:45 pm

ORD

ICN

35h 15m

1 stop

$1,148Multiple Airlines

Wed, Jul 8 - Thu, Aug 27

8:05 pm - 2:20 pm

ICN

ORD

32h 15m

1 stop

5:30 pm - 6:45 pm

ORD

ICN

35h 15m

1 stop

$1,150Multiple Airlines

Wed, Jul 8 - Thu, Aug 27

8:05 pm - 2:20 pm

ICN

ORD

32h 15m

1 stop

5:30 pm - 6:45 pm

ORD

ICN

35h 15m

1 stop

$1,156Multiple Airlines

Wed, Jul 8 - Thu, Aug 27

5:45 pm - 2:43 pm

ICN

ORD

34h 58m

1 stop

7:45 pm - 4:05 pm

ORD

ICN

30h 20m

1 stop

$1,201Air Canada

Mon, Oct 12 - Thu, Oct 22

6:35 pm - 8:10 am

ICN

STL

28h 35m

2 stops

4:48 pm - 4:25 pm

STL

ICN

32h 37m

2 stops

$1,250American Airlines

Thu, Nov 12 - Mon, Nov 16

6:35 pm - 8:27 am

ICN

STL

28h 52m

2 stops

5:17 am - 4:25 pm

STL

ICN

20h 08m

1 stop

$1,251American Airlines

Thu, Nov 12 - Mon, Nov 16

12:45 pm - 8:34 pm

ICN

STL

22h 49m

2 stops

2:56 pm - 5:40 am

STL

ICN

23h 44m

2 stops

$1,308United Airlines

Thu, Nov 12 - Mon, Nov 16

12:45 pm - 8:34 pm

ICN

STL

22h 49m

2 stops

2:56 pm - 5:40 am

STL

ICN

23h 44m

2 stops

$1,312United Airlines

Thu, Nov 12 - Mon, Nov 16

7:00 pm - 9:50 am

ICN

MDW

28h 50m

2 stops

7:13 pm - 5:20 pm

MDW

ICN

32h 07m

1 stop

$1,541Delta

Mon, Sep 14 - Sat, Sep 26

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Air Canada flights from Seoul to Illinois

Our best Air Canada deals on Seoul to Illinois flight tickets

Air Canada

Oct 12

ICN5:45 pmIncheon Intl

34h 58m

1 stop

ORD2:43 pmChicago O'Hare Intl

Oct 22

ORD7:45 pmChicago O'Hare Intl

30h 20m

1 stop

ICN4:05 pmIncheon Intl

$1,201

Air Canada

Sep 14

ICN5:45 pmIncheon Intl

34h 58m

1 stop

ORD2:43 pmChicago O'Hare Intl

Sep 28

ORD7:45 pmChicago O'Hare Intl

30h 20m

1 stop

ICN4:05 pmIncheon Intl

$1,203

Air Canada

Nov 19

ICN6:55 pmIncheon Intl

27h 55m

2 stops

ORD7:50 amChicago O'Hare Intl

Apr 15

ORD3:40 pmChicago O'Hare Intl

34h 25m

1 stop

ICN4:05 pmIncheon Intl

$1,204

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets

Japan Airlines

Jul 3

GMP8:00 amSeoul Gimpo Intl

30h 07m

2 stops

ORD12:07 amChicago O'Hare Intl

Jul 24

ORD9:00 amChicago O'Hare Intl

22h 15m

2 stops

GMP9:15 pmSeoul Gimpo Intl

$1,315

Japan Airlines

Jul 3

GMP8:00 amSeoul Gimpo Intl

30h 07m

2 stops

ORD12:07 amChicago O'Hare Intl

Jul 24

ORD9:00 amChicago O'Hare Intl

22h 15m

2 stops

GMP9:15 pmSeoul Gimpo Intl

$1,328

Japan Airlines

Jul 3

GMP8:00 amSeoul Gimpo Intl

30h 07m

2 stops

ORD12:07 amChicago O'Hare Intl

Jul 24

ORD9:00 amChicago O'Hare Intl

22h 15m

2 stops

GMP9:15 pmSeoul Gimpo Intl

$1,333

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 8/25

1:00 pm-6:17 am

1 stop31h 17m

Chicago O'Hare Intl

Mon 8/31

9:20 am-4:30 am

2 stops29h 10m

$1,145

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 7/8

8:05 pm-2:20 pm

1 stop32h 15m

Chicago O'Hare Intl

Thu 8/27

5:30 pm-6:45 pm

1 stop35h 15m

$1,148

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 7/8

8:05 pm-2:20 pm

1 stop32h 15m

Chicago O'Hare Intl

Thu 8/27

5:30 pm-6:45 pm

1 stop35h 15m

$1,150

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 7/8

8:05 pm-2:20 pm

1 stop32h 15m

Chicago O'Hare Intl

Thu 8/27

5:30 pm-6:45 pm

1 stop35h 15m

$1,156

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 10/12

5:45 pm-2:43 pm

1 stop34h 58m

Chicago O'Hare Intl

Thu 10/22

7:45 pm-4:05 pm

1 stop30h 20m

$1,201

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/12

6:35 pm-8:10 am

2 stops28h 35m

Lambert-St Louis

Mon 11/16

4:48 pm-4:25 pm

2 stops32h 37m

$1,250

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/12

6:35 pm-8:27 am

2 stops28h 52m

Lambert-St Louis

Mon 11/16

5:17 am-4:25 pm

1 stop20h 08m

$1,251

Quickest round-trip

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/12

12:45 pm-8:34 pm

2 stops22h 49m

Lambert-St Louis

Mon 11/16

2:56 pm-5:40 am

2 stops23h 44m

$1,308

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 11/12

12:45 pm-8:34 pm

2 stops22h 49m

Lambert-St Louis

Mon 11/16

2:56 pm-5:40 am

2 stops23h 44m

$1,312

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Mon 9/14

7:00 pm-9:50 am

2 stops28h 50m

Chicago Midway

Sat 9/26

7:13 pm-5:20 pm

1 stop32h 07m

$1,541

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 August. Flight prices, which tend to average around $117, 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 August, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $225.

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

The cheapest day to depart from Seoul to Illinois is on a Wednesday when prices can be found for as low as $1,317. Flights from Seoul to Illinois on a Tuesday will generally be more expensive and average around $1,660. 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 from Seoul 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 $1,259 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 $896 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

Fastest flight time	12h 50m
Direct flights	Every day
Airports in Illinois	98 airports

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

Direct flights go from Seoul to Illinois every day.

There are 98 airports in Illinois. From Seoul there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying from Seoul to Illinois

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 4 operators available for flights from Seoul to Illinois as of June 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 91.63% of the total bookings. Other popular models include Airbus A380-800 with 2.96%, Boeing 787-9 Dreamliner with 2.46%, and Airbus A350-900 with 1.97%.

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 $269	Free Cancellation	Rating 7.8 8,426 reviews	Search Delta flights
Alaska Airlines	PriceFrom $567	Free Cancellation	Rating 7.9 12,562 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $586	Free Cancellation	Rating 7.4 9,873 reviews	Search United Airlines flights
Korean Air	PriceFrom $1,153	Free Cancellation	Rating 8.4 1,218 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 $62

Flights to Los Angelesfrom $56

Flights to Orlandofrom $63

Flights to Miamifrom $78

Flights to Chicagofrom $74

Flights to San Franciscofrom $50

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $57

Flights to Bostonfrom $54

Flights to Atlantafrom $58

Flights to Fort Lauderdalefrom $59

Flights to Dallasfrom $72

Cheap flights from Seoul to Illinois from $424

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 11/9. 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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Air Canada flights from Seoul to Illinois

Our best Air Canada 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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See travel insights to Illinois from

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 from Seoul 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

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying 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?

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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