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 50% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

13 flights are operational weekly from Seoul to Illinois as of October 2025. The most popular departure day for this route is Mon, with 15% of flights per week taking off on this day.

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

Air Canada, EVA Air, and Cathay Pacific 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 1 per day as of October 2025. The most frequent departure time is 10:00AM, with 100% of daily flights leaving at noon.

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 15h 10m.

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 October 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.

$380 Cheap Flights from Seoul to Illinois in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:15 pm - 5:56 amICN-ORD

25h 41m2 stops

10:00 pm - 4:45 pmORD-ICN

27h 45m2 stops

$559American Airlines

Find Deal

mar., nov. 25 - mar., dic. 2

7:15 pm - 9:24 pmICN-ORD

17h 09m1 stop

8:47 pm - 4:45 pmORD-ICN

28h 58m2 stops

$561American Airlines

Find Deal

mié., dic. 10 - lun., dic. 15

8:35 pm - 5:10 pmICN-ORD

35h 35m1 stop

6:50 pm - 6:35 pmORD-ICN

32h 45m1 stop

$567Hawaiian Airlines

Find Deal

sáb., feb. 7 - sáb., feb. 21

8:35 pm - 6:29 amICN-ORD

24h 54m1 stop

8:00 am - 6:35 pmORD-ICN

19h 35m1 stop

$578Hawaiian Airlines

Find Deal

jue., dic. 25 - mié., feb. 11

7:30 pm - 8:55 amICN-STL

28h 25m1 stop

6:00 am - 4:30 pmSTL-ICN

19h 30m2 stops

$618Delta

Find Deal

jue., nov. 20 - mié., dic. 3

8:05 pm - 2:48 pmICN-STL

33h 43m2 stops

7:00 am - 4:20 pmSTL-ICN

18h 20m1 stop

$687Delta

Find Deal

jue., feb. 12 - lun., feb. 16

6:55 pm - 9:54 pmICN-STL

41h 59m2 stops

9:00 am - 5:10 pmSTL-ICN

41h 10m2 stops

$1,217Air Canada

Find Deal

lun., nov. 17 - vie., nov. 21

6:55 pm - 9:54 pmICN-STL

41h 59m2 stops

9:00 am - 5:10 pmSTL-ICN

41h 10m2 stops

$1,379Air Canada

Find Deal

dom., nov. 16 - vie., nov. 21

9:35 am - 12:34 pmICN-MDW

17h 59m1 stop

6:00 am - 3:50 pmMDW-ICN

18h 50m1 stop

$1,818Korean Air

Find Deal

vie., dic. 5 - jue., dic. 11

9:35 am - 12:34 pmICN-MDW

17h 59m1 stop

5:39 pm - 5:45 amMDW-ICN

21h 06m1 stop

$1,878Korean Air

Find Deal

mar., dic. 9 - mar., dic. 16

American Airlines flights from Seoul to Illinois

Our best American Airlines deals on Seoul to Illinois flight tickets

American Airlines

Nov 25

ICN7:15 pmIncheon Intl

25h 41m

2 stops

ORD5:56 amChicago O'Hare Intl

Dec 2

ORD10:00 pmChicago O'Hare Intl

27h 45m

2 stops

ICN4:45 pmIncheon Intl

$559

Find similar

American Airlines

Dec 10

ICN7:15 pmIncheon Intl

17h 09m

1 stop

ORD9:24 pmChicago O'Hare Intl

Dec 15

ORD8:47 pmChicago O'Hare Intl

28h 58m

2 stops

ICN4:45 pmIncheon Intl

$561

Find similar

American Airlines

Nov 7

ICN7:15 pmIncheon Intl

28h 29m

1 stop

ORD8:44 amChicago O'Hare Intl

Nov 12

ORD8:45 pmChicago O'Hare Intl

29h 00m

2 stops

ICN4:45 pmIncheon Intl

$563

Find similar

Hawaiian Airlines flights from Seoul to Illinois

Our best Hawaiian Airlines deals on Seoul to Illinois flight tickets

Hawaiian Airlines

Feb 7

ICN8:35 pmIncheon Intl

35h 35m

1 stop

ORD5:10 pmChicago O'Hare Intl

Feb 21

ORD6:50 pmChicago O'Hare Intl

32h 45m

1 stop

ICN6:35 pmIncheon Intl

$567

Find similar

Hawaiian Airlines

Dec 25

ICN8:35 pmIncheon Intl

24h 54m

1 stop

ORD6:29 amChicago O'Hare Intl

Feb 11

ORD8:00 amChicago O'Hare Intl

19h 35m

1 stop

ICN6:35 pmIncheon Intl

$578

Find similar

Hawaiian Airlines

Feb 1

ICN8:35 pmIncheon Intl

18h 20m

1 stop

ORD11:55 pmChicago O'Hare Intl

Feb 14

ORD6:50 pmChicago O'Hare Intl

32h 45m

1 stop

ICN6:35 pmIncheon Intl

$699

Find similar

Fly from

Fly to

Route

Depart

Return

Price

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mar. 11/25

7:15 pm-5:56 am

2 stops25h 41m

Chicago O'Hare Intl

mar. 12/2

10:00 pm-4:45 pm

2 stops27h 45m

$559

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

mié. 12/10

7:15 pm-9:24 pm

1 stop17h 09m

Chicago O'Hare Intl

lun. 12/15

8:47 pm-4:45 pm

2 stops28h 58m

$561

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

sáb. 2/7

8:35 pm-5:10 pm

1 stop35h 35m

Chicago O'Hare Intl

sáb. 2/21

6:50 pm-6:35 pm

1 stop32h 45m

$567

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

jue. 12/25

8:35 pm-6:29 am

1 stop24h 54m

Chicago O'Hare Intl

mié. 2/11

8:00 am-6:35 pm

1 stop19h 35m

$578

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 11/20

7:30 pm-8:55 am

1 stop28h 25m

Lambert-St Louis

mié. 12/3

6:00 am-4:30 pm

2 stops19h 30m

$618

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

jue. 2/12

8:05 pm-2:48 pm

2 stops33h 43m

Lambert-St Louis

lun. 2/16

7:00 am-4:20 pm

1 stop18h 20m

$687

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

lun. 11/17

6:55 pm-9:54 pm

2 stops41h 59m

Lambert-St Louis

vie. 11/21

9:00 am-5:10 pm

2 stops41h 10m

$1,217

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

dom. 11/16

6:55 pm-9:54 pm

2 stops41h 59m

Lambert-St Louis

vie. 11/21

9:00 am-5:10 pm

2 stops41h 10m

$1,379

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

vie. 12/5

9:35 am-12:34 pm

1 stop17h 59m

Chicago Midway

jue. 12/11

6:00 am-3:50 pm

1 stop18h 50m

$1,818

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

mar. 12/9

9:35 am-12:34 pm

1 stop17h 59m

Chicago Midway

mar. 12/16

5:39 pm-5:45 am

1 stop21h 06m

$1,878

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 $829, 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 October is also cheap. Prices for this month can be found on momondo for an average of $894.

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 Friday will generally be more expensive and average around $1,542. 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 $1,283 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 $804 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	$3,248
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 $3,248. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,216.

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 October 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 86.67% of the total bookings. Other popular models include Airbus A380-800 with 5.45%, Airbus A350-900 with 3.64%, and Boeing 787-9 Dreamliner with 3.03%.

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 7,994 reviews	Search Delta flights
Asiana Airlines	PriceFrom $558	Free Cancellation	Rating 8.2 483 reviews	Search Asiana Airlines flights
Air Canada	PriceFrom $730	Free Cancellation	Rating 7.1 10,370 reviews	Search Air Canada flights
Korean Air	PriceFrom $787	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 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 Washington, D.C.from $40

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Flights to Seattlefrom $45

Cheap flights from Seoul to Illinois from $380

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 11/1. 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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American Airlines flights from Seoul to Illinois

Our best American Airlines deals on Seoul to Illinois flight tickets

Hawaiian Airlines flights from Seoul to Illinois

Our best Hawaiian Airlines deals on Seoul to Illinois flight tickets

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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?

No. A direct flight is the cheapest option for a flight between Seoul to Illinois.

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

Air Canada, EVA Air, and Cathay Pacific 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 October 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?

13 flights are operational weekly from Seoul to Illinois as of October 2025. The most popular departure day for this route is Mon, with 15% 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