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Cheap flights from Seoul to Illinois from $393

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 2/18. 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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Find the cheapest flights from Seoul to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Air Canada Logo
5:45 pm - 2:45 pm
ICN
-
ORD
35h 00m
1 stop
Air Canada Logo
7:50 pm - 4:05 pm
ORD
-
ICN
30h 15m
1 stop
$657Air Canada
Thu, May 28 - Tue, Jun 2
Air Canada Logo
6:55 pm - 2:41 pm
ICN
-
ORD
34h 46m
1 stop
Air Canada Logo
8:00 am - 6:25 pm
ORD
-
ICN
19h 25m
1 stop
$662Air Canada
Thu, Feb 19 - Wed, Mar 4
Air Canada Logo
5:45 pm - 7:58 pm
ICN
-
ORD
16h 13m
1 stop
Air Canada Logo
3:40 pm - 4:05 pm
ORD
-
ICN
34h 25m
1 stop
$673Air Canada
Wed, Apr 29 - Tue, May 5
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m
1 stop
Multiple Airlines Logo
7:00 am - 5:15 am
STL
-
ICN
32h 15m
1 stop
$712Multiple Airlines
Mon, Apr 13 - Sun, Apr 19
Multiple Airlines Logo
9:00 pm - 11:59 pm
ICN
-
STL
16h 59m
1 stop
Multiple Airlines Logo
7:00 am - 5:15 am
STL
-
ICN
32h 15m
1 stop
$714Multiple Airlines
Mon, Apr 13 - Sun, Apr 19
ANA Logo
7:55 pm - 8:40 am
GMP
-
ORD
26h 45m
1 stop
ANA Logo
5:45 pm - 10:20 pm
ORD
-
GMP
38h 35m
1 stop
$1,047ANA
Wed, Jul 8 - Thu, Aug 27
ANA Logo
12:25 pm - 7:20 am
GMP
-
ORD
33h 55m
1 stop
ANA Logo
4:25 pm - 11:20 am
ORD
-
GMP
27h 55m
1 stop
$1,052ANA
Wed, Feb 11 - Wed, Feb 18
Delta Logo
7:30 pm - 9:06 am
ICN
-
MDW
28h 36m
1 stop
Delta Logo
1:49 pm - 3:30 pm
MDW
-
ICN
34h 41m
1 stop
$1,200Delta
Wed, Feb 11 - Wed, Feb 18
Delta Logo
7:30 pm - 8:50 am
ICN
-
MDW
27h 20m
1 stop
Delta Logo
7:20 pm - 5:20 pm
MDW
-
ICN
32h 00m
1 stop
$1,201Delta
Tue, Mar 10 - Tue, Mar 31
Japan Airlines Logo
7:20 pm - 11:59 pm
GMP
-
STL
42h 39m
2 stops
Japan Airlines Logo
7:12 am - 9:50 pm
STL
-
GMP
24h 38m
2 stops
$1,495Japan Airlines
Sat, Apr 11 - Tue, Apr 21

Hawaiian Airlines flights from Seoul to Illinois

Our best Hawaiian Airlines deals on Seoul to Illinois flight tickets
Hawaiian Airlines
Feb 19
ICN8:35 pmIncheon Intl
32h 36m
1 stop
ORD2:11 pmChicago O'Hare Intl
Mar 4
ORD7:00 amChicago O'Hare Intl
20h 35m
1 stop
ICN6:35 pmIncheon Intl
$789
Hawaiian Airlines
Feb 2
ICN8:35 pmIncheon Intl
35h 35m
1 stop
ORD5:10 pmChicago O'Hare Intl
Feb 13
ORD3:54 pmChicago O'Hare Intl
35h 41m
1 stop
ICN6:35 pmIncheon Intl
$811
Hawaiian Airlines
Mar 13
ICN8:35 pmIncheon Intl
17h 24m
1 stop
STL11:59 pmLambert-St Louis
Mar 20
STL4:20 pmLambert-St Louis
36h 15m
1 stop
ICN6:35 pmIncheon Intl
$1,143

ANA flights from Seoul to Illinois

Our best ANA deals on Seoul to Illinois flight tickets
ANA
Jul 8
GMP7:55 pmSeoul Gimpo Intl
26h 45m
1 stop
ORD8:40 amChicago O'Hare Intl
Aug 27
ORD5:45 pmChicago O'Hare Intl
38h 35m
1 stop
GMP10:20 pmSeoul Gimpo Intl
$1,047
ANA
Feb 11
GMP12:25 pmSeoul Gimpo Intl
33h 55m
1 stop
ORD7:20 amChicago O'Hare Intl
Feb 18
ORD4:25 pmChicago O'Hare Intl
27h 55m
1 stop
GMP11:20 amSeoul Gimpo Intl
$1,052
ANA
Feb 10
GMP7:45 amSeoul Gimpo Intl
21h 05m
1 stop
ORD1:50 pmChicago O'Hare Intl
Feb 17
ORD4:25 pmChicago O'Hare Intl
27h 55m
1 stop
GMP11:20 amSeoul Gimpo Intl
$1,057

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 January 29, 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

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 5/28

5:45 pm-2:45 pm

1 stop35h 00m

Chicago O'Hare Intl

Tue 6/2

7:50 pm-4:05 pm

1 stop30h 15m

$657

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 2/19

6:55 pm-2:41 pm

1 stop34h 46m

Chicago O'Hare Intl

Wed 3/4

8:00 am-6:25 pm

1 stop19h 25m

$662

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Wed 4/29

5:45 pm-7:58 pm

1 stop16h 13m

Chicago O'Hare Intl

Tue 5/5

3:40 pm-4:05 pm

1 stop34h 25m

$673

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

Sun 4/19

7:00 am-5:15 am

1 stop32h 15m

$712

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Mon 4/13

9:00 pm-11:59 pm

1 stop16h 59m

Lambert-St Louis

Sun 4/19

7:00 am-5:15 am

1 stop32h 15m

$714

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Wed 7/8

7:55 pm-8:40 am

1 stop26h 45m

Chicago O'Hare Intl

Thu 8/27

5:45 pm-10:20 pm

1 stop38h 35m

$1,047

SeoulChicago

GMP - ORD

GMPORD

Seoul Gimpo Intl

Wed 2/11

12:25 pm-7:20 am

1 stop33h 55m

Chicago O'Hare Intl

Wed 2/18

4:25 pm-11:20 am

1 stop27h 55m

$1,052

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Wed 2/11

7:30 pm-9:06 am

1 stop28h 36m

Chicago Midway

Wed 2/18

1:49 pm-3:30 pm

1 stop34h 41m

$1,200

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Tue 3/10

7:30 pm-8:50 am

1 stop27h 20m

Chicago Midway

Tue 3/31

7:20 pm-5:20 pm

1 stop32h 00m

$1,201

SeoulSt. Louis

GMP - STL

GMPSTL

Seoul Gimpo Intl

Sat 4/11

7:20 pm-11:59 pm

2 stops42h 39m

Lambert-St Louis

Tue 4/21

7:12 am-9:50 pm

2 stops24h 38m

$1,495

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 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 Monday when prices can be found for as low as $1,356. 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 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 $1,189 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 $815 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 3% 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

$1,146

Fastest flight time

13h 00m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Seoul in the past 72 hours is $1,146. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,389.
The fastest flight from Seoul to Illinois takes 13h 00m
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

  • 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 $197Free CancellationRating
8.0
11,805 reviews
Search Alaska Airlines flights
DeltaPriceFrom $229Free CancellationRating
7.9
8,125 reviews
Search Delta flights
Asiana AirlinesPriceFrom $558Free CancellationRating
8.1
501 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
9,214 reviews
Search United Airlines flights
Korean AirPriceFrom $687Free CancellationRating
8.4
1,188 reviews
Search Korean Air flights
Air CanadaPriceFrom $730Free CancellationRating
7.1
10,666 reviews
Search Air Canada 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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