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Cheap flights from Seoul to Illinois from $367

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 2/17. 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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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.
Hawaiian Airlines Logo
8:35 pm - 11:50 pm
ICN
-
ORD
18h 15m1 stop
Hawaiian Airlines Logo
8:00 am - 6:35 pm
ORD
-
ICN
19h 35m1 stop
$543Hawaiian Airlines
Fri, Jan 30 - Fri, Feb 6
Hawaiian Airlines Logo
8:35 pm - 2:38 pm
ICN
-
ORD
33h 03m1 stop
Hawaiian Airlines Logo
6:06 pm - 6:35 pm
ORD
-
ICN
33h 29m1 stop
$555Hawaiian Airlines
Fri, Jan 30 - Fri, Feb 6
Multiple Airlines Logo
8:35 pm - 11:50 pm
ICN
-
ORD
18h 15m1 stop
Multiple Airlines Logo
8:00 am - 6:35 pm
ORD
-
ICN
19h 35m1 stop
$560Multiple Airlines
Fri, Jan 30 - Fri, Feb 6
American Airlines Logo
7:15 pm - 7:30 am
ICN
-
ORD
27h 15m2 stops
American Airlines Logo
8:55 pm - 4:45 pm
ORD
-
ICN
28h 50m1 stop
$564American Airlines
Tue, Feb 3 - Tue, Feb 10
American Airlines Logo
5:25 pm - 7:10 am
ICN
-
ORD
27h 45m2 stops
American Airlines Logo
5:00 am - 3:30 pm
ORD
-
ICN
20h 30m1 stop
$566American Airlines
Thu, Apr 9 - Fri, Apr 24
Multiple Airlines Logo
8:35 pm - 2:38 pm
ICN
-
ORD
33h 03m1 stop
Multiple Airlines Logo
3:35 pm - 6:35 pm
ORD
-
ICN
36h 00m1 stop
$575Multiple Airlines
Mon, Feb 2 - Sat, Feb 7
United Airlines Logo
6:00 pm - 4:54 pm
ICN
-
MLI
37h 54m2 stops
United Airlines Logo
8:46 am - 4:15 pm
MLI
-
ICN
64h 29m2 stops
$606United Airlines
Tue, Feb 3 - Sat, Feb 7
United Airlines Logo
12:45 pm - 10:00 pm
ICN
-
STL
24h 15m2 stops
United Airlines Logo
11:20 am - 5:40 am
STL
-
ICN
27h 20m2 stops
$661United Airlines
Thu, Jan 29 - Thu, Feb 5
Delta Logo
7:30 pm - 1:09 pm
ICN
-
MDW
32h 39m1 stop
Delta Logo
5:00 pm - 3:30 pm
MDW
-
ICN
31h 30m1 stop
$1,175Delta
Thu, Jan 29 - Sat, Jan 31
Delta Logo
7:40 pm - 8:50 am
ICN
-
MDW
27h 10m1 stop
Delta Logo
9:20 am - 5:20 pm
MDW
-
ICN
18h 00m1 stop
$1,179Delta
Fri, Apr 10 - Thu, Apr 23

American Airlines flights from Seoul to Illinois

Our best American Airlines deals on Seoul to Illinois flight tickets
American Airlines
Apr 21
ICN5:25 pmIncheon Intl
30h 02m
1 stop
ORD9:27 amChicago O'Hare Intl
Apr 23
ORD5:00 amChicago O'Hare Intl
20h 30m
1 stop
ICN3:30 pmIncheon Intl
$564
Find similar
American Airlines
Apr 21
ICN5:25 pmIncheon Intl
30h 02m
1 stop
ORD9:27 amChicago O'Hare Intl
Apr 23
ORD6:00 amChicago O'Hare Intl
19h 30m
1 stop
ICN3:30 pmIncheon Intl
$565
Find similar
American Airlines
Apr 9
ICN5:25 pmIncheon Intl
20h 25m
1 stop
ORD11:50 pmChicago O'Hare Intl
Apr 19
ORD8:25 pmChicago O'Hare Intl
29h 05m
2 stops
ICN3:30 pmIncheon Intl
$566
Find similar

Japan Airlines flights from Seoul to Illinois

Our best Japan Airlines deals on Seoul to Illinois flight tickets
Japan Airlines
Apr 1
GMP7:55 amSeoul Gimpo Intl
19h 51m
2 stops
STL1:46 pmLambert-St Louis
Apr 5
STL6:38 amLambert-St Louis
49h 12m
2 stops
GMP9:50 pmSeoul Gimpo Intl
$1,262
Find similar
Japan Airlines
Jun 6
GMP7:55 amSeoul Gimpo Intl
15h 20m
1 stop
ORD9:15 amChicago O'Hare Intl
Jun 18
ORD1:30 amChicago O'Hare Intl
26h 30m
1 stop
GMP6:00 pmSeoul Gimpo Intl
$1,431
Find similar
Japan Airlines
Apr 1
GMP7:55 amSeoul Gimpo Intl
15h 10m
1 stop
ORD9:05 amChicago O'Hare Intl
Apr 4
ORD1:05 amChicago O'Hare Intl
30h 45m
1 stop
GMP9:50 pmSeoul Gimpo Intl
$1,492
Find similar

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 December 17, 2025.
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

Fri 1/30

8:35 pm-11:50 pm

1 stop18h 15m

Chicago O'Hare Intl

Fri 2/6

8:00 am-6:35 pm

1 stop19h 35m

$543

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 1/30

8:35 pm-2:38 pm

1 stop33h 03m

Chicago O'Hare Intl

Fri 2/6

6:06 pm-6:35 pm

1 stop33h 29m

$555

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Fri 1/30

8:35 pm-11:50 pm

1 stop18h 15m

Chicago O'Hare Intl

Fri 2/6

8:00 am-6:35 pm

1 stop19h 35m

$560

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Tue 2/3

7:15 pm-7:30 am

2 stops27h 15m

Chicago O'Hare Intl

Tue 2/10

8:55 pm-4:45 pm

1 stop28h 50m

$564

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Thu 4/9

5:25 pm-7:10 am

2 stops27h 45m

Chicago O'Hare Intl

Fri 4/24

5:00 am-3:30 pm

1 stop20h 30m

$566

IncheonChicago

ICN - ORD

ICNORD

Incheon Intl

Mon 2/2

8:35 pm-2:38 pm

1 stop33h 03m

Chicago O'Hare Intl

Sat 2/7

3:35 pm-6:35 pm

1 stop36h 00m

$575

IncheonMoline

ICN - MLI

ICNMLI

Incheon Intl

Tue 2/3

6:00 pm-4:54 pm

2 stops37h 54m

Moline Quad-City

Sat 2/7

8:46 am-4:15 pm

2 stops64h 29m

$606

IncheonSt. Louis

ICN - STL

ICNSTL

Incheon Intl

Thu 1/29

12:45 pm-10:00 pm

2 stops24h 15m

Lambert-St Louis

Thu 2/5

11:20 am-5:40 am

2 stops27h 20m

$661

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Thu 1/29

7:30 pm-1:09 pm

1 stop32h 39m

Chicago Midway

Sat 1/31

5:00 pm-3:30 pm

1 stop31h 30m

$1,175

IncheonChicago

ICN - MDW

ICNMDW

Incheon Intl

Fri 4/10

7:40 pm-8:50 am

1 stop27h 10m

Chicago Midway

Thu 4/23

9:20 am-5:20 pm

1 stop18h 00m

$1,179

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 $598, 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 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 $1,220 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?

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

$1,123

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 $1,123. The best round-trip flight deal from Seoul to Illinois found on momondo in the last 72 hours is $1,320.
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

  • 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
11,469 reviews
Search Alaska Airlines flights
DeltaPriceFrom $229Free CancellationRating
7.9
8,008 reviews
Search Delta flights
Asiana AirlinesPriceFrom $558Free CancellationRating
8.2
493 reviews
Search Asiana Airlines flights
United AirlinesPriceFrom $586Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights
Korean AirPriceFrom $687Free CancellationRating
8.4
1,186 reviews
Search Korean Air flights
Air CanadaPriceFrom $730Free CancellationRating
7.1
10,531 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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