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Cheap flights from Illinois to Seoul from $330

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Seoul departing on 10/26. 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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Cheap round-trip flights

Cathay Pacific Logo
4:00 pm - 9:10 pmORD-ICN
39h 10m1 stop
Cathay Pacific Logo
8:05 pm - 2:25 pmICN-ORD
32h 20m1 stop
$730Cathay Pacific
Find Deal
mié., oct. 1 - mar., oct. 14
Cathay Pacific Logo
4:00 pm - 7:05 pmORD-ICN
37h 05m1 stop
Cathay Pacific Logo
1:40 pm - 2:25 pmICN-ORD
38h 45m1 stop
$737Cathay Pacific
Find Deal
mié., oct. 1 - mar., oct. 14
Multiple Airlines Logo
5:30 pm - 6:45 pmORD-ICN
35h 15m1 stop
Multiple Airlines Logo
9:25 pm - 10:57 pmICN-ORD
39h 32m2 stops
$778Multiple Airlines
Find Deal
mar., sep. 30 - mié., oct. 29
Multiple Airlines Logo
6:50 am - 3:45 pmORD-ICN
42h 55m2 stops
Multiple Airlines Logo
8:45 pm - 1:35 pmICN-ORD
30h 50m1 stop
$801Multiple Airlines
Find Deal
jue., oct. 16 - sáb., oct. 25
American Airlines Logo
8:03 pm - 3:30 pmSTL-ICN
29h 27m2 stops
American Airlines Logo
5:45 pm - 8:51 amICN-STL
29h 06m1 stop
$828American Airlines
Find Deal
dom., sep. 21 - lun., oct. 6
American Airlines Logo
3:59 pm - 3:30 pmSTL-ICN
33h 31m1 stop
American Airlines Logo
5:55 pm - 9:20 amICN-STL
29h 25m1 stop
$844American Airlines
Find Deal
sáb., sep. 27 - dom., oct. 26
Air Canada Logo
9:15 am - 5:30 pmSTL-ICN
18h 15m1 stop
Air Canada Logo
7:05 pm - 3:18 pmICN-STL
34h 13m1 stop
$848Air Canada
Find Deal
dom., sep. 21 - lun., oct. 6
Delta Logo
6:50 am - 3:20 pmSTL-ICN
18h 30m1 stop
Delta Logo
7:40 pm - 12:24 amICN-STL
19h 44m1 stop
$856Delta
Find Deal
vie., oct. 24 - dom., nov. 2
Delta Logo
6:00 am - 4:30 pmSTL-ICN
20h 30m2 stops
Delta Logo
7:40 pm - 12:24 amICN-STL
19h 44m1 stop
$861Delta
Find Deal
vie., oct. 24 - dom., nov. 2
Air Canada Logo
9:15 am - 5:30 pmSTL-ICN
18h 15m1 stop
Air Canada Logo
7:05 pm - 3:24 pmICN-STL
34h 19m1 stop
$1,089Air Canada
Find Deal
lun., oct. 6 - sáb., abr. 4

Cathay Pacific flights from Illinois to Incheon Intl Airport

Our best Cathay Pacific deals on Illinois to Incheon Intl Airport flight tickets
Cathay Pacific
Oct 1
ORD4:00 pmChicago O'Hare Intl
39h 10m
1 stop
ICN9:10 pmIncheon Intl
Oct 14
ICN8:05 pmIncheon Intl
32h 20m
1 stop
ORD2:25 pmChicago O'Hare Intl
$730
Find similar
Cathay Pacific
Oct 1
ORD4:00 pmChicago O'Hare Intl
37h 05m
1 stop
ICN7:05 pmIncheon Intl
Oct 14
ICN1:40 pmIncheon Intl
38h 45m
1 stop
ORD2:25 pmChicago O'Hare Intl
$737
Find similar
Cathay Pacific
Oct 1
ORD4:00 pmChicago O'Hare Intl
32h 05m
1 stop
ICN2:05 pmIncheon Intl
Oct 14
ICN1:40 pmIncheon Intl
38h 45m
1 stop
ORD2:25 pmChicago O'Hare Intl
$738
Find similar

Delta flights from Illinois to Incheon Intl Airport

Our best Delta deals on Illinois to Incheon Intl Airport flight tickets
Delta
Oct 24
STL6:50 amLambert-St Louis
18h 30m
1 stop
ICN3:20 pmIncheon Intl
Nov 2
ICN7:40 pmIncheon Intl
19h 44m
1 stop
STL12:24 amLambert-St Louis
$856
Find similar
Delta
Oct 24
STL6:00 amLambert-St Louis
20h 30m
2 stops
ICN4:30 pmIncheon Intl
Nov 2
ICN7:40 pmIncheon Intl
19h 44m
1 stop
STL12:24 amLambert-St Louis
$861
Find similar
Delta
Oct 2
STL6:00 amLambert-St Louis
20h 30m
2 stops
ICN4:30 pmIncheon Intl
Oct 13
ICN6:40 pmIncheon Intl
18h 27m
1 stop
STL11:07 pmLambert-St Louis
$866
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momondo Fare Finder

 
Customize your flight search to find flights from Illinois to Incheon Intl Airport 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 septiembre 17, 2025.
Use the filters below to find and compare flights from Illinois to Incheon Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

mié. 10/1

4:00 pm-9:10 pm

1 stop39h 10m

Incheon Intl

mar. 10/14

8:05 pm-2:25 pm

1 stop32h 20m

$730

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

mié. 10/1

4:00 pm-7:05 pm

1 stop37h 05m

Incheon Intl

mar. 10/14

1:40 pm-2:25 pm

1 stop38h 45m

$737

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

mar. 9/30

5:30 pm-6:45 pm

1 stop35h 15m

Incheon Intl

mié. 10/29

9:25 pm-10:57 pm

2 stops39h 32m

$778

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

jue. 10/16

6:50 am-3:45 pm

2 stops42h 55m

Incheon Intl

sáb. 10/25

8:45 pm-1:35 pm

1 stop30h 50m

$801

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 9/21

8:03 pm-3:30 pm

2 stops29h 27m

Incheon Intl

lun. 10/6

5:45 pm-8:51 am

1 stop29h 06m

$828

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

sáb. 9/27

3:59 pm-3:30 pm

1 stop33h 31m

Incheon Intl

dom. 10/26

5:55 pm-9:20 am

1 stop29h 25m

$844

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 9/21

9:15 am-5:30 pm

1 stop18h 15m

Incheon Intl

lun. 10/6

7:05 pm-3:18 pm

1 stop34h 13m

$848

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

vie. 10/24

6:50 am-3:20 pm

1 stop18h 30m

Incheon Intl

dom. 11/2

7:40 pm-12:24 am

1 stop19h 44m

$856

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

vie. 10/24

6:00 am-4:30 pm

2 stops20h 30m

Incheon Intl

dom. 11/2

7:40 pm-12:24 am

1 stop19h 44m

$861

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

lun. 10/6

9:15 am-5:30 pm

1 stop18h 15m

Incheon Intl

sáb. 4/4

7:05 pm-3:24 pm

1 stop34h 19m

$1,089

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Illinois to Incheon Intl Airport

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 Incheon Intl Airport?

The cheapest month to fly to Incheon Intl Airport from Illinois is in August. Flight prices, which tend to average around $760, are often lower during this time because this is during the off-season. If you are unable to visit Incheon Intl Airport during the month of August, then departing from Illinois during the month October is also very affordable. Most momondo users find prices during this month for around $1,080.

What is the cheapest day to depart on your flight to Incheon Intl Airport?

The cheapest day to depart from Illinois to Incheon Intl Airport is on a Tuesday when prices can be found for as low as $1,054. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,348. These prices are subject to change though, so be sure to set up a Price Alert for flights to Incheon Intl Airport.

What is the cheapest time of day to depart on your flight to Incheon Intl Airport?

At noon is the cheapest time of day to fly from Illinois to Incheon Intl Airport when you can find flight prices for as low as $920. Flying to Incheon Intl Airport at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $1,466 on average. Flights to Incheon Intl Airport from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Incheon Intl flight route?

Fly from Chicago O'Hare Intl to Incheon Intl for the best Illinois - Incheon Intl flight prices

How far in advance should I book a flight to Incheon Intl Airport?

You are more likely to see cheaper flights to Incheon Intl Airport from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Incheon Intl Airport for around $1,472 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Incheon Intl Airport from Illinois for as low as $1,382 on momondo.

What cabin class options are available on Illinois to Incheon Intl flights?

There are 4 cabin classes available to choose from on Illinois to Incheon Intl 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 Illinois to Incheon Intl Airport flights?

You could potentially save up to 18% on your flight if you consider stops on a Illinois to Incheon Intl Airport flight.

Cheap Illinois to Incheon Intl Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Incheon Intl Airport

Best Price Found

$504

Fastest flight time

14h 40m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Illinois in the past 72 hours is $504. The best round-trip flight deal from Illinois to Incheon Intl Airport found on momondo in the last 72 hours is $847.
The fastest flight from Illinois to Incheon Intl Airport takes 14h 40m
Direct flights go from Illinois to Incheon Intl Airport every day.
Search flight deals

  • When did momondo last update prices for flights from Illinois to Incheon Intl Airport?

    Prices for flights from Illinois to Incheon Intl Airport were last updated today.

  • How many operators does momondo search for flights from Illinois to Incheon Intl Airport?

  • How old do you have to be to fly from Illinois to Incheon Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Illinois to Incheon Intl Airport.

  • What documentation or ID do you need to fly to Incheon Intl Airport?

    The travel and health documents required for your trip to Incheon Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Incheon Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Illinois to Incheon Intl Airport?

Best airlines flying from Illinois to Incheon Intl Airport

Compare and see reviews for airlines that fly from Illinois to Incheon Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $297Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
DeltaPriceFrom $297Free CancellationRating
7.9
7,961 reviews
Search Delta flights
Cathay PacificPriceFrom $639Free CancellationRating
7.6
998 reviews
Search Cathay Pacific flights
Turkish AirlinesPriceFrom $848Free CancellationRating
7.3
3,965 reviews
Search Turkish Airlines flights
Air CanadaPriceFrom $901Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
American AirlinesPriceFrom $926Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
EVA AirPriceFrom $1,085Free CancellationRating
8.4
1,237 reviews
Search EVA Air flights
FinnairPriceFrom $1,110Free CancellationRating
7.6
1,324 reviews
Search Finnair flights
Korean AirPriceFrom $1,493Free CancellationRating
8.4
1,140 reviews
Search Korean Air flights

Traveling to a place near Seoul?

Book flights to Seoul if you plan to visit one of these locations
Suwon
Daejeon
Seongnam
Anyang

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Seoul?

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 Illinois to Seoul for you.

Can I find flights from Illinois to Seoul with flexible booking policies on momondo?

Yes. All flights to Seoul from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to Seoul?

Once all potential Illinois to Seoul 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 Illinois to Seoul right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to Seoul now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seoul and let you know when they change.

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