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Cheap flights from Seoul to Illinois from $433

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 11/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Seoul to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:30 am - 4:55 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
24h 25m1 stop Manila Ninoy Aquino Intl
Multiple Airlines Logo
8:00 am - 7:10 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
44h 10m2 stops Seattle/Tacoma Intl Manila Ninoy Aquino Intl
$741Multiple Airlines
Wed, Nov 11 - Thu, Dec 3
Multiple Airlines Logo
8:30 pm - 4:55 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
35h 25m1 stop Manila Ninoy Aquino Intl
Multiple Airlines Logo
8:00 am - 7:10 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
44h 10m2 stops Seattle/Tacoma Intl Manila Ninoy Aquino Intl
$741Multiple Airlines
Tue, Nov 10 - Thu, Dec 3
Air Canada Logo
6:55 pm - 2:37 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
34h 42m1 stop Vancouver Intl
Air Canada Logo
3:30 pm - 5:10 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
34h 40m1 stop Vancouver Intl
$929Air Canada
Sat, Dec 19 - Thu, Dec 31
Air Canada Logo
6:55 pm - 2:37 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
34h 42m1 stop Vancouver Intl
Air Canada Logo
3:30 pm - 5:10 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
34h 40m1 stop Vancouver Intl
$934Air Canada
Fri, Nov 6 - Sun, Nov 15
United Airlines Logo
5:15 pm - 11:40 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
20h 25m2 stops Newark Washington, D.C. Dulles Intl
United Airlines Logo
3:56 pm - 4:20 amORD  Chicago O'Hare Intl-ICN Incheon Intl
22h 24m2 stops Denver Intl San Francisco
$1,268United Airlines
Mon, Sep 7 - Mon, Sep 21
United Airlines Logo
5:15 pm - 11:40 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
20h 25m2 stops Newark Washington, D.C. Dulles Intl
United Airlines Logo
5:00 am - 3:00 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
20h 00m2 stops Denver Intl San Francisco
$1,268United Airlines
Wed, Sep 9 - Wed, Sep 23
Alaska Airlines Logo
7:35 pm - 1:22 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
31h 47m2 stops Seattle/Tacoma Intl San Diego
Alaska Airlines Logo
2:18 pm - 5:30 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
37h 12m2 stops San Diego Seattle/Tacoma Intl
$1,284Alaska Airlines
Mon, Sep 14 - Tue, Sep 22
Alaska Airlines Logo
7:35 pm - 1:22 pmICN  Incheon Intl-ORD Chicago O'Hare Intl
31h 47m2 stops Seattle/Tacoma Intl San Diego
Alaska Airlines Logo
7:20 am - 5:30 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
44h 10m2 stops San Diego Seattle/Tacoma Intl
$1,284Alaska Airlines
Fri, Sep 11 - Tue, Sep 22
Delta Logo
10:40 am - 9:30 amICN  Incheon Intl-ORD Chicago O'Hare Intl
12h 50mnonstop
Delta Logo
5:20 pm - 3:50 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
31h 30m1 stop Minneapolis St Paul
$1,315Delta
Wed, Oct 14 - Mon, Jan 4
Delta Logo
7:40 pm - 8:30 amICN  Incheon Intl-ORD Chicago O'Hare Intl
26h 50m1 stop Minneapolis St Paul
Delta Logo
12:10 pm - 4:50 pmORD  Chicago O'Hare Intl-ICN Incheon Intl
14h 40mnonstop
$1,315Delta
Thu, Sep 17 - Thu, Sep 24

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Air Canada flights from Seoul to Illinois

Our best Air Canada deals on Seoul to Illinois flight tickets
Air Canada
Dec 19
ICN6:55 pmIncheon Intl
34h 42m
1 stop
ORD2:37 pmChicago O'Hare Intl
Dec 31
ORD3:30 pmChicago O'Hare Intl
34h 40m
1 stop
ICN5:10 pmIncheon Intl
$929
Air Canada
Nov 6
ICN6:55 pmIncheon Intl
34h 42m
1 stop
ORD2:37 pmChicago O'Hare Intl
Nov 15
ORD3:30 pmChicago O'Hare Intl
34h 40m
1 stop
ICN5:10 pmIncheon Intl
$934
Air Canada
Dec 19
ICN6:55 pmIncheon Intl
34h 42m
1 stop
ORD2:37 pmChicago O'Hare Intl
Dec 31
ORD9:22 pmChicago O'Hare Intl
28h 48m
2 stops
ICN5:10 pmIncheon Intl
$936

EVA Air flights from Seoul to Illinois

Our best EVA Air deals on Seoul to Illinois flight tickets
EVA Air
Sep 23
GMP8:20 pmSeoul Gimpo Intl
38h 25m
1 stop
ORD8:45 pmChicago O'Hare Intl
Oct 11
ORD12:30 amChicago O'Hare Intl
27h 40m
1 stop
GMP6:10 pmSeoul Gimpo Intl
$1,308
EVA Air
Nov 6
GMP1:50 pmSeoul Gimpo Intl
20h 45m
1 stop
ORD7:35 pmChicago O'Hare Intl
Nov 15
ORD11:30 pmChicago O'Hare Intl
27h 30m
1 stop
GMP6:00 pmSeoul Gimpo Intl
$1,331
EVA Air
Aug 21
ICN12:00 pmIncheon Intl
23h 10m
1 stop
ORD9:10 pmChicago O'Hare Intl
Sep 15
ORD12:30 amChicago O'Hare Intl
28h 15m
1 stop
ICN6:45 pmIncheon Intl
$1,439

momondo Fare Finder

 
Customize your flight search to find flights from Seoul to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 12, 2026.
Use the filters below to find and compare flights from Seoul to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Wed 11/11

7:30 am-4:55 pm

1 stop24h 25m

Chicago O'Hare Intl

Thu 12/3

8:00 am-7:10 pm

2 stops44h 10m

$741

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Tue 11/10

8:30 pm-4:55 pm

1 stop35h 25m

Chicago O'Hare Intl

Thu 12/3

8:00 am-7:10 pm

2 stops44h 10m

$741

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Sat 12/19

6:55 pm-2:37 pm

1 stop34h 42m

Chicago O'Hare Intl

Thu 12/31

3:30 pm-5:10 pm

1 stop34h 40m

$929

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Fri 11/6

6:55 pm-2:37 pm

1 stop34h 42m

Chicago O'Hare Intl

Sun 11/15

3:30 pm-5:10 pm

1 stop34h 40m

$934

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Mon 9/7

5:15 pm-11:40 pm

2 stops20h 25m

Chicago O'Hare Intl

Mon 9/21

3:56 pm-4:20 am

2 stops22h 24m

$1,268
Quickest round-trip

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Wed 9/9

5:15 pm-11:40 pm

2 stops20h 25m

Chicago O'Hare Intl

Wed 9/23

5:00 am-3:00 pm

2 stops20h 00m

$1,268

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Mon 9/14

7:35 pm-1:22 pm

2 stops31h 47m

Chicago O'Hare Intl

Tue 9/22

2:18 pm-5:30 pm

2 stops37h 12m

$1,284

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Fri 9/11

7:35 pm-1:22 pm

2 stops31h 47m

Chicago O'Hare Intl

Tue 9/22

7:20 am-5:30 pm

2 stops44h 10m

$1,284

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Wed 10/14

10:40 am-9:30 am

Nonstop12h 50m

Chicago O'Hare Intl

Mon 1/4

5:20 pm-3:50 pm

1 stop31h 30m

$1,315

IncheonChicago

ICN Incheon Intl - ORD Chicago O'Hare Intl

ICNORD

Incheon Intl

Thu 9/17

7:40 pm-8:30 am

1 stop26h 50m

Chicago O'Hare Intl

Thu 9/24

12:10 pm-4:50 pm

Nonstop14h 40m

$1,315

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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?

The cheapest month to fly to Illinois from Seoul is in December. Flight prices, which tend to average around $726, 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 December, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $760.

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 Thursday will generally be more expensive and average around $1,680. 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 $1,275 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 2 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 9% 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

$1,357

Fastest flight time

12h 50m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Seoul in the past 72 hours is $1,357. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,485.
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?

  • 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?

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 AirlinesPriceFrom $567Free CancellationRating
7.9
12,797 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
10,111 reviews
Search United Airlines flights
Air CanadaPriceFrom $707Free CancellationRating
7.1
11,464 reviews
Search Air Canada flights
DeltaPriceFrom $1,028Free CancellationRating
7.8
8,505 reviews
Search Delta flights
Korean AirPriceFrom $1,153Free CancellationRating
8.4
1,221 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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