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Cheap flights from Illinois to Seoul from $335

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 3/3. 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
0 bags

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Find the cheapest flights from Illinois to Seoul

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:00 am - 3:50 pm
STL
-
ICN
18h 50m1 stop
Delta Logo
7:40 pm - 9:38 pm
ICN
-
STL
16h 58m1 stop
$746Delta
mar., ene. 27 - mar., feb. 3
Delta Logo
6:10 am - 4:30 pm
STL
-
ICN
19h 20m2 stops
Delta Logo
7:40 pm - 9:38 pm
ICN
-
STL
16h 58m1 stop
$750Delta
mar., ene. 27 - mar., feb. 3
Multiple Airlines Logo
2:50 pm - 6:35 pm
STL
-
ICN
36h 45m1 stop
Multiple Airlines Logo
8:35 pm - 2:23 pm
ICN
-
STL
32h 48m1 stop
$758Multiple Airlines
mié., ene. 14 - sáb., feb. 14
United Airlines Logo
5:25 pm - 5:40 am
STL
-
ICN
21h 15m1 stop
United Airlines Logo
12:45 pm - 4:44 pm
ICN
-
STL
18h 59m1 stop
$846United Airlines
dom., feb. 15 - jue., feb. 19
Cathay Pacific Logo
2:35 pm - 12:45 pm
ORD
-
ICN
31h 10m1 stop
Cathay Pacific Logo
7:35 pm - 12:55 pm
ICN
-
ORD
32h 20m1 stop
$846Cathay Pacific
mié., ene. 28 - mié., feb. 4
United Airlines Logo
5:25 pm - 5:40 am
STL
-
ICN
21h 15m1 stop
United Airlines Logo
12:45 pm - 10:59 pm
ICN
-
STL
25h 14m2 stops
$850United Airlines
dom., feb. 15 - jue., feb. 19
Cathay Pacific Logo
2:35 pm - 1:55 pm
ORD
-
ICN
32h 20m1 stop
Cathay Pacific Logo
7:35 pm - 12:55 pm
ICN
-
ORD
32h 20m1 stop
$856Cathay Pacific
lun., ene. 19 - lun., feb. 2
Turkish Airlines Logo
8:20 pm - 9:05 am
ORD
-
ICN
21h 45m1 stop
Turkish Airlines Logo
12:10 am - 10:05 am
ICN
-
ORD
24h 55m1 stop
$874Turkish Airlines
sáb., feb. 14 - mié., feb. 18
Turkish Airlines Logo
8:20 pm - 6:20 pm
ORD
-
ICN
31h 00m1 stop
Turkish Airlines Logo
10:45 am - 6:25 pm
ICN
-
ORD
46h 40m1 stop
$901Turkish Airlines
dom., feb. 15 - vie., feb. 27
Multiple Airlines Logo
6:17 pm - 5:40 am
ORD
-
ICN
21h 23m1 stop
Multiple Airlines Logo
9:20 pm - 5:50 pm
ICN
-
ORD
34h 30m2 stops
$915Multiple Airlines
mié., mar. 11 - mar., mar. 17

Turkish Airlines flights from Illinois to Incheon Intl Airport

Our best Turkish Airlines deals on Illinois to Incheon Intl Airport flight tickets
Turkish Airlines
Feb 14
ORD8:20 pmChicago O'Hare Intl
21h 45m
1 stop
ICN9:05 amIncheon Intl
Feb 18
ICN12:10 amIncheon Intl
24h 55m
1 stop
ORD10:05 amChicago O'Hare Intl
$874
Find similar
Turkish Airlines
Feb 15
ORD8:20 pmChicago O'Hare Intl
31h 00m
1 stop
ICN6:20 pmIncheon Intl
Feb 27
ICN10:45 amIncheon Intl
46h 40m
1 stop
ORD6:25 pmChicago O'Hare Intl
$901
Find similar
Turkish Airlines
Feb 15
ORD8:20 pmChicago O'Hare Intl
31h 00m
1 stop
ICN6:20 pmIncheon Intl
Feb 26
ICN12:10 amIncheon Intl
33h 15m
1 stop
ORD6:25 pmChicago O'Hare Intl
$938
Find similar

Delta flights from Illinois to Incheon Intl Airport

Our best Delta deals on Illinois to Incheon Intl Airport flight tickets
Delta
Jan 27
STL6:00 amLambert-St Louis
18h 50m
1 stop
ICN3:50 pmIncheon Intl
Feb 3
ICN7:40 pmIncheon Intl
16h 58m
1 stop
STL9:38 pmLambert-St Louis
$746
Find similar
Delta
Jan 27
STL5:04 pmLambert-St Louis
31h 26m
2 stops
ICN3:30 pmIncheon Intl
Feb 3
ICN9:35 amIncheon Intl
21h 32m
2 stops
STL4:07 pmLambert-St Louis
$750
Find similar
Delta
Jan 12
STL3:45 pmLambert-St Louis
33h 05m
1 stop
ICN3:50 pmIncheon Intl
Feb 11
ICN7:25 pmIncheon Intl
19h 12m
1 stop
STL11:37 pmLambert-St Louis
$851
Find similar

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 diciembre 15, 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

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mar. 1/27

6:00 am-3:50 pm

1 stop18h 50m

Incheon Intl

mar. 2/3

7:40 pm-9:38 pm

1 stop16h 58m

$746

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mar. 1/27

6:10 am-4:30 pm

2 stops19h 20m

Incheon Intl

mar. 2/3

7:40 pm-9:38 pm

1 stop16h 58m

$750

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

mié. 1/14

2:50 pm-6:35 pm

1 stop36h 45m

Incheon Intl

sáb. 2/14

8:35 pm-2:23 pm

1 stop32h 48m

$758

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 2/15

5:25 pm-5:40 am

1 stop21h 15m

Incheon Intl

jue. 2/19

12:45 pm-4:44 pm

1 stop18h 59m

$846

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

mié. 1/28

2:35 pm-12:45 pm

1 stop31h 10m

Incheon Intl

mié. 2/4

7:35 pm-12:55 pm

1 stop32h 20m

$846

St. LouisIncheon

STL - ICN

STLICN

Lambert-St Louis

dom. 2/15

5:25 pm-5:40 am

1 stop21h 15m

Incheon Intl

jue. 2/19

12:45 pm-10:59 pm

2 stops25h 14m

$850

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

lun. 1/19

2:35 pm-1:55 pm

1 stop32h 20m

Incheon Intl

lun. 2/2

7:35 pm-12:55 pm

1 stop32h 20m

$856

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

sáb. 2/14

8:20 pm-9:05 am

1 stop21h 45m

Incheon Intl

mié. 2/18

12:10 am-10:05 am

1 stop24h 55m

$874

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

dom. 2/15

8:20 pm-6:20 pm

1 stop31h 00m

Incheon Intl

vie. 2/27

10:45 am-6:25 pm

1 stop46h 40m

$901

ChicagoIncheon

ORD - ICN

ORDICN

Chicago O'Hare Intl

mié. 3/11

6:17 pm-5:40 am

1 stop21h 23m

Incheon Intl

mar. 3/17

9:20 pm-5:50 pm

2 stops34h 30m

$915

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 Seoul from

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 January is also very affordable. Most momondo users find prices during this month for around $1,126.

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 $982. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $1,281. 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 $1,541 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 $1,311 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 2% 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

$583

Fastest flight time

14h 20m

Direct flights

Every day
The best one-way flight to Incheon Intl Airport from Illinois in the past 72 hours is $583. The best round-trip flight deal from Illinois to Incheon Intl Airport found on momondo in the last 72 hours is $793.
The fastest flight from Illinois to Incheon Intl Airport takes 14h 20m
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
DeltaPriceFrom $194Free CancellationRating
7.9
8,008 reviews
Search Delta flights
United AirlinesPriceFrom $287Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Cathay PacificPriceFrom $639Free CancellationRating
7.6
1,095 reviews
Search Cathay Pacific flights
Turkish AirlinesPriceFrom $849Free CancellationRating
7.3
4,100 reviews
Search Turkish Airlines flights
American AirlinesPriceFrom $926Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
EVA AirPriceFrom $1,003Free CancellationRating
8.5
1,297 reviews
Search EVA Air flights
Air CanadaPriceFrom $1,095Free CancellationRating
7.1
10,526 reviews
Search Air Canada flights
FinnairPriceFrom $1,110Free CancellationRating
7.6
1,337 reviews
Search Finnair flights
Korean AirPriceFrom $1,503Free CancellationRating
8.4
1,186 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
Seongnam
Daejeon
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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