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Find cheap flights from Seoul Incheon Airport to Illinois from $400

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Incheon to Illinois departing on 5/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 5/25
Sat 6/1

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicago1 stop$950
Champaign
Champaign2 stops$2,432
St. Louis
St. Louis1 stop$1,154

Good to know

Low season

March

High season

December

Cheapest flight

$400
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 12% lower on average.
Flight from Incheon to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Incheon to Illinois?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Incheon to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Incheon to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Incheon is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Incheon to Illinois?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Illinois with an airline and back to Incheon with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Incheon to Illinois?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Illinois from Incheon up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Morning departure is around 59% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from Incheon to Illinois

 
Need help choosing which airline to fly with from Incheon to Illinois? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.5
Korean AirOverall score based on 1192 reviews
8.2food
8.3comfort
8.6boarding
8.8crew
8.2entertainment
Airline reviews

The flight crews were extremely professional helpful and courteous. Departure and arrival times were accurate. No delay. Thanks

10.0 ExcellentAnonymous, Apr 2024ICN - SGN
Read more about Korean Air reviews

The flight crews were extremely professional helpful and courteous. Departure and arrival times were accurate. No delay. Thanks

Not very comfortable seated in the back plane due to turbulence

Everything about Korean air is great, hands down! Will always prefer this airline from other carriers.

Ford not that great the seat not to big for leg room like other airline

Crew was ok, but some passengers were a bit rude. Again, all outlets were not working, only the really slow charging usb plug on the entertainment system. Entertainment system was also bugged, some features just crash, the touch screen wasn't working and when trying to watch a movie the onscreen display kept flashing off and on making it very difficult to watch.

New plane. Perfect gluten free meal Very flawless procedures from check-in to the landing. Taking off on time and landing even earlier and the luggages are already there after shortest arrival report.

It was ok. Not good and not a bad experience

not too bad but not too great either. Service on all airlines declined ever since covid. Your Delta Stewardess are not that friendly at all. :-(

I like your stewardess, they are nice. However, your food could have been better and wheres your dessert? You do not offer beer or scotch. I do not drink alcohol biut my husband can have one or two, he has to ask if he can have one. during dinner or lunch, it should be offerred. Also, you do not have the most famous drinks ginger ale

Not accommodating ground staff On board slow service Crew members not very friendly

Asian Vegitarian food was test less No Salt or pepper served Need to improve with Chef who can caters for Peaple from India I am sure Chef knows different varieties of food Indian People like

The flight attendant, where kind of rude, there where hiding for almost 3 hours, without doing rounds to see if people needed water or pickup the water cups, the toilets were full of water cups, because they never come back to pick them up.

Flew on an Airbus 350-900. Excellent aircraft properly cleaned and serviced. Flight crew was excellent plane departed and arrived on time. The A350 has excellent air circulation far better than the 777. I would recommend Asiana to anyone looking to fly in a clean comfortable environment. This is my second round trip flight from New York to Bangkok via Asiana and I will book Asiana again!

Amazing service and fabulous syaff. Loved the jumbo jet too, comfortable.

The entertainment screens are dated and needs to be changed to new screens. Then when we got home, I found out 2 of our luggage’s were damaged (huge) and some items stolen.

JetBlue's check-in was great, but there was an in-flight attendant who was very rude and unkind. I didn't realize that the bathrooms were already locked 30 mins prior to landing and needed to use the restroom. Instead of politely asking me to return, she rudely told me, 'NO, bathrooms are locked! Go back to your seat!' The JetBlue flight was more than an hour delay, which made me almost miss my connecting flight with Asiana. I understand the reasoning, but the action they took to get a hold of maintenance was time consuming. It took them more than 30 mins to get a hold of maintenance and for maintenance to get started. The Asiana flight and crew were wonderful, in general. They waited for us who were delayed from the previous flight before they took off and were very kind to take my checked baggage's info. Seats were a little uncomfortable for such long flight, but service and flight attendants were great! However, my 3 checked baggages are missing! They're lost somewhere in the transition. I'm writing this review 3 days after my arrival to the Philippines, and my 3 checked baggages, where my wedding dress is, are all still missing! I and the CEB airport crew have sent multiple emails to both JetBlue and Asiana, and neither has responded to any of our emails. Although, I was able to get in contact with JetBlue's Interline Department who confirmed that the bags were turned over to Asiana without confirmation details.

Airfare was ok . Food not good , seat ok but not comfortable. Lay over too long , crew was ok Overall just ok

The crew was amazing and really nice. The OS on the entertainment system could use an update, though. It felt old and outdated but had anything you'd need to keep busy. I usually never use it anyways, but that did stand out.

2 things that really tanked our experience with this trip with Asiana Airline (which used to be among my favorite airlines): 1) The "random" security screening at the boarding gate is crazily thorough (which is completely redundant to the security screening before we went through the security checkpoint before getting into the gate area), and the water was acquired inside of the gate area (from a lounge operated by the Inchon airport). We were asked to take out *EVERY* single items from the carry-on luggage and open up every comtainers / bags / packages to inspect. To add to it, there were two inspection workers there (one seemed to be a trainee and the other seemed to be a trainer), and the trainer worker held a very unfriendly / arrogant attitude towards us. As the youngest member (a minor) of my family was being "screened", the rest of my family wanted to make sure that no inappropriate actions would happen to her. That trainer worker yelled at us and attempted to use rude body language (waving her hands) and facial expression to ask us to stay away. 2) The luggage handling at the destination was really *REALLY* bad. Among my 25+ years of travel experiences, I'm going to have to say that this was the worst luggage experience where we didn't lose our luggage. Our flight was scheduled to land 12:45pm, and landed around 1pm. 15mins delay in landing is absolutely normal. Deplane process took a bit longer than usual flight (we waited for around 20mins, after arriving at the gate, before people were able to actually leave the plane). However, the luggage took another *2 HOURS* to arrive at the baggage claim carousel. This is insane. What's worse is, due to the delay in luggage, the flurry of passengers from our flight collided with 3 other incoming flights. The US border / custom line was like the longest Disneyland attraction line winding through the entire arrival hall and around all the baggage claim carousels (like at least a thousand people). I've never seen anything like that at SeaTec airport (US border control), period. The luggage claim experience really tanked our trust and overall impression for Asiana Airline's Seattle airport ground operational effectiveness and efficiency. This has to change in order for them to remain relevant / in-business with increased competitions from Korean Air and other Asia-based airlines.

The seats (legroom) are tight and chairs cushion is stiff (not comfortable). The crew was courteous, professional and friendly. There was no food / snack for this flight (very short flight, but still would be nice to provide some snack for the enjoyment).

Excellent meal served with real utensils, cardboard served hot meals instead of plastic utensils and plastic covers. Quick service, friendly and accommodating stewards.

They made me check my carry on even though there was room We un boarded in a strange way but overall it was good

When boarding, after business class should be premium economy, but economy class already lined-up at the gate blocking premium economy to board. Singapore airline crew should done a better job to organize this chaos :( Thank you.

It seems paying premium economy does not make difference with economy. No priority boarding, not worthy paying extra$$$ for premium economy.

The premium economy seats were not that great. It could have been more premium than economy seats.

They were able to assist my elderly father and myself after not being able to check in to scoot. The counter service was phenomenal. They did what they could to get us on the next plane so we could catch our Connecting flight. Scoot closed early on us so we ended up missing our flight.

They are great with every aspect of customer service. Helped my elderly father and aided him with using the restroom.

Transfer within the same terminal and lots of facilities at the airport.

Even though it was a very full flight, the service was still excellent, the plane did not feel too cramped and cabin crew made a sincere effort to help passengers find overhead space for stowing luggage.

The stewardess was very helpful all the way. My seat had an issue with headphones and after the replaced and gave me a new pair and noticed it was the seat I got a new chair to sit and a great ride back home

At the boarding gate, Jeju airline accepted "carry on" bags for checking in for free due to the "limited cabin space". This is because most passengers were carrying multiple bags that exceed the size and weight limit for carry on items. Rather than inspecting carry-on bags at the counter and requiring excess bags to be checked in for a fee, they allowed freeloading at the boarding gate to to the detriment of those who paid the fee for checked bags. This is totally unfair.

As posred earlier the crew was very accommodating & professional. Thank You Allen

All though you can not help it the kids was loud and unruly, The crew was very accommodating and professional. Thank You Allen.

No priority counter check in for families with young children.

The flight was delayed from GUM to ICN, there was no notification on how delayed the flight would be. Although we received notice, there was no specified time given. The flight was also very uncomfortable.

Cons: "Sold me a ticket then cancelled 15 minutes later due to not having updated information from the airline on bookings."

ok flight, but charged for everything. water, food, baggage. no free water available, I had to plead to give me water to take medicine.

Need to consider about zero entertainment services and lack of flight information!

I can't board the 2nd flight due to the last 1st flight. In the 1st flight check-in, I can't board due to the stupid problem of K-ETA visa. The booking system and the flight company should inform the customer a few days earlier. This is the worse experience in my life. I won't use KAYAK and the airline anymore. My friends were also surprised about this stupid situation. I won't use KAYAK and T'way anymore.

I can't board the flight due to the K-ETA problem. You should inform the customer clearly a few days before the flight. I can't cancel/change the flight now. This is the worst experience in my life. I also never hear about this kind of bad experience. I won't use the booking system and the flight company anymore.

Pros: "We received great assistance at the check-in counter and were helped out even though we arrived late. The ground crew was actually great."
Cons: "We only got water. Felt like a bus ride. Minimum comfort but fair for the price."

Book cheap flights from Incheon to Illinois

Recent round-trip flight deals

9/10Tue
1 stopAir Canada
34h 26mICN-ORD
9/24Tue
1 stopAir Canada
30h 23mORD-ICN
$950
10/2Wed
1 stopAmerican Airlines
17h 35mICN-ORD
10/7Mon
1 stopAmerican Airlines
19h 56mORD-ICN
$980
5/15Wed
2 stopsUnited Airlines
21h 37mICN-ORD
5/22Wed
2 stopsUnited Airlines
27h 23mORD-ICN
$1,085
6/4Tue
1 stopUnited Airlines
23h 34mICN-ORD
7/16Tue
1 stopUnited Airlines
21h 00mORD-ICN
$1,091
9/5Thu
1 stopKorean Air
15h 49mICN-STL
9/11Wed
1 stopKorean Air
18h 50mSTL-ICN
$1,227
9/10Tue
nonstopKorean Air
12h 50mICN-ORD
9/24Tue
nonstopKorean Air
14h 30mORD-ICN
$1,246
5/9Thu
1 stopAsiana Airlines
37h 45mICN-ORD
5/23Thu
1 stopAsiana Airlines
20h 25mORD-ICN
$1,250
5/14Tue
1 stopAsiana Airlines
18h 10mICN-ORD
5/21Tue
1 stopAsiana Airlines
19h 55mORD-ICN
$1,251
8/26Mon
2 stopsSingapore Airlines
45h 15mICN-ORD
9/6Fri
2 stopsSingapore Airlines
32h 10mORD-ICN
$1,261
8/26Mon
2 stopsSingapore Airlines
42h 55mICN-ORD
9/6Fri
2 stopsSingapore Airlines
32h 10mORD-ICN
$1,263

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Recent one-way flight deals

5/21Tue
2 stops
36h 55mICN-ORD
$400
5/16Thu
2 stops
42h 37mICN-ORD
$409
9/20Fri
1 stopAir Canada
34h 26mICN-ORD
$764
10/1Tue
2 stopsAir Canada
27h 56mICN-ORD
$794
10/14Mon
2 stopsSingapore Airlines
44h 25mICN-ORD
$806
8/27Tue
2 stopsSingapore Airlines
42h 55mICN-ORD
$809
8/23Fri
1 stopAsiana Airlines
19h 45mICN-ORD
$908
7/4Thu
1 stopAsiana Airlines
19h 45mICN-ORD
$911
8/8Thu
1 stopKorean Air
15h 49mICN-STL
$1,237
7/10Wed
1 stopKorean Air
16h 09mICN-MDW
$1,318

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Last minute flights from Incheon to Illinois

Last minute flight, train and bus deals

4/30Tue
multi-stop
53h 13mICN-ORD
5/2Thu
multi-stop
37h 20mORD-ICN
$1,178
4/30Tue
multi-stop
53h 13mICN-ORD
5/3Fri
multi-stop
20h 45mORD-ICN
$1,189
4/29Mon
multi-stopEVA Air
23h 00mICN-ORD
7/28Sun
multi-stopEVA Air
20h 30mORD-ICN
$1,258
4/28Sun
multi-stopEVA Air
39h 15mICN-ORD
7/27Sat
multi-stopEVA Air
28h 15mORD-ICN
$1,418
4/29Mon
multi-stopAsiana Airlines
36h 12mICN-ORD
7/29Mon
multi-stopAsiana Airlines
20h 20mORD-ICN
$1,443
4/29Mon
multi-stopAsiana Airlines
36h 12mICN-ORD
5/8Wed
multi-stopAsiana Airlines
20h 25mORD-ICN
$1,444
4/26Fri
multi-stopKorean Air
16h 18mICN-ORD
4/29Mon
nonstopKorean Air
14h 30mORD-ICN
$1,529
4/29Mon
multi-stopKorean Air
18h 38mICN-ORD
7/29Mon
nonstopKorean Air
14h 20mORD-ICN
$1,531
4/28Sun
multi-stopUnited Airlines
16h 32mICN-ORD
5/8Wed
multi-stopUnited Airlines
20h 00mORD-ICN
$1,564
4/28Sun
multi-stopUnited Airlines
17h 11mICN-ORD
5/10Fri
multi-stopUnited Airlines
27h 15mORD-ICN
$1,610

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Incheon - Illinois Flights

Departure:

Seoul Incheon Airport (ICN)South Korea

Return flight deals:

Illinois - Seoul Incheon Airport

Cabin classes:

$4,834
$1,354