$427 Find Cheap Flights from Seoul Incheon Airport to Illinois

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 Intl to Illinois departing on 3/19. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Illinois, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Incheon to Illinois, as well as popular online travel agencies
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Best Illinois Flight Deals from Incheon Intl

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

Chicago
Chicago1 stop$659
Champaign
Champaign2 stops$1,851
St. Louis
St. Louis2 stops$840

Good to know

Low season

February

High season

July

Cheapest flight

$427
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 34% increase in price.
Flight from Seoul Incheon Airport to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Seoul Incheon Airport 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 Seoul Incheon Airport to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seoul Incheon Airport to Illinois 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 Seoul Incheon Airport 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 from Seoul Incheon Airport to Illinois with an airline and back with another airline.

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

  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be July, August and September. The cheapest month to fly from Incheon is February.
  • Morning departure is around 39% 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 Intl to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Incheon to Illinois. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Incheon Intl 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.
8.4
Korean AirOverall score based on 1039 reviews
8.2Entertainment
8.1Food
8.7Crew
8.5Boarding
8.2Comfort
Airline reviews

I loved everything, I was just a little confused on my bag allowance. When I checked in it said I was allowed 2 check in bags, but when I got there they said I was only allowed 1 so I had to pay an additional 200 dollars! Other then that everything was great! I would love to use your Airlines again when I fly out to Manila again in late May, however I want to be able to have 2 bags included this time lol 😆

10.0 ExcellentDaniel, Feb 2025ICN - DFW
Read more Korean Air reviews

I loved everything, I was just a little confused on my bag allowance. When I checked in it said I was allowed 2 check in bags, but when I got there they said I was only allowed 1 so I had to pay an additional 200 dollars! Other then that everything was great! I would love to use your Airlines again when I fly out to Manila again in late May, however I want to be able to have 2 bags included this time lol 😆

Need to have space for Cary on when traveler boarding any zone

everything was fine, would have liked better food but it was warm, great choices for movies

the water for tea could have been hot, entertainment was awful, lots of old movies and TV shows

The carry on baggage was collected before boarding without further information where the passengers can collect them . When the flight arrived at Tan son Nhat airport, it was very complicate to find the luggage

I like it when the plane have waited for passengers like us who are trying to catch the plane. Detroit was my mom's port of entry we spent too much time looking for our luggages at baggage claim which no problem. But then the problem occur after the immigration when the homeland security agents forgot to give us our passports which it took so long to find them and I was very anxious because we might not be able to catch our flights but luckily the plane to knoxville still sitting there and waiting for us. Praise the Lord for everything.

I took several flights that day, this was the only flight that was absolutely freezing!! It was so cold.

They changed aircrafts and they moved my seats that were already prepaid. I did not get the seats I paid for, so I got expensive seats that I didn't want

The flight was at least 3 hours late with not much of an explanation other than connecting flight was late

Good. Obviously there is a slightly condescending attitude of all American workers towards their customers but other than that all good.

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Lower number on this flight so spaced out passengers. Able to enjoy more room to relax during flight. It was lovely.

Everything was ok!! Just bags came up a little be late.

Tasty snacks. On-time departure and early arrival. Luggage arrived quickly at the carrousel. The only negative was a man behind us that was heavily inebriated. He was served 3 double drinks during the flight. There was no telling how much he had before the flight. He was so out of it that he spilled a drink and broke the heavy liquor glass on the floor. I don't believe he should have been served so much alcohol on a two-hour flight.

Kind staff. Snacks are small but that’s the new normal.

The young man who was our flight attendant in first class was lazy and did not do his job well at all. Never offered drinks upon boarding - actually I take that back... said "are you okay with water" as if I do not want to get you anything else, only passed the snacks around once, got my drink order wrong and then never offered a second round of drinks. He was the worst I have ever seen on Delta and we fly a lot.

The crew was very kind and always smiling. The seats were great and I was very comfortable during the flight. The only thing I didn't like was that the lavatories got really dirty at some point during the flight. Other than that my experience was great

Very modern plane. Good seat spacing. Meals were good. Screens had tons of movies and worked

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

lots of delays the crew were unclear about where to pick up my carry-on, which they took from me to check in on the plane.

They needed people to check a bag, they did check my bag and I had to wait 10 minutes after the flight to get it it wasn’t too bad

Did not even get on board. Was told I needed an esta agreement. Was not aware of this when I booked the fare and not told about them

Everything was on time, we arrived early, everything worked well.

The only thing is if Wi-Fi is available after you land and taxi to the gate. It takes forever to get to the gate, and having the Wi-Fi continue would be great to bide the time at least 5 minutes before you arrive at the entrance. That is my only comment; otherwise, everything was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

Seating was horrible. Small seats. Access to flight information and extras very iser unfriendly. Kept losing internet after paying for it. Staff in madison was as unprofessional and unhelpful.

Delayed due to no crew. On a major holiday travel day.

Other than being delayed 5.5 hours and having to get a hotel because I missed my connecting flight, it was an okay flight. No in-flight Wi-Fi or entertainment.

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight from Buffalo to Chicago was on an older and smaller plane. Seating was tight. Looking closely at the interior of the aircraft there were definitely signs of aging and wear.

The flight encountered a delay exceeding 4 hours. The food voucher issued was valued at $12, insufficient to cover our meal expenses. Consequently, I was unable to take my medication, leading to a drop in blood sugar levels and exacerbating my anxiety.

Airplane was cold. Flight attendants were rude. Phone charger did not work. No food available.

My flight was cancelled and I was left to figure out where to find a hotel, something to eat and how to get a new flight at 11:30pm. Wasted a day. Thanks, Air Canada!

flight was delayed 6 hours for weather, then cancelled because of the crash in toronto, but none of the links to cancel or rebook my flights are working

They kept changing the gate (6 times in 30 minutes) and then left us on the plane for 4 hours before departure. Likely was the storm, which is understandable, but the lack of communication and the e constant running between gates at opposite ends of the airport really threw me and my friend for a loop.

Legitimately everything about this flight was awful, was also so delayed I never want to use air Canada again

Terrible all around. Flight was late and airplane was very uncomfortable. The crew were unhelpful and hid in the back. Did zero work. No entertainment.

Because I am quite tall a bit more leg room would have been more comfortable. Out of three seats I had the middle one, unfortunately.

I like the free beer and wine but not the delays to the departure time.

Never again flying economy on Rouge!!! Literally like sardines!!! Will try to change to better seats 3 seat arrangement only so so if traveling with family. Who wants to squished to stranger!!😖 Can’t say enough bad about this!!!

I booked and paid extra for exit door seats also pre paid for my luggage air Canada changed plains and I never got what I paid for and they made me pay for luggage again they also did this to my wife. They are the most unorganized company I have ever dealt with. I am sure I will never see the extra money I paid for the seats or the recharge for the luggage. They are subsidized by the taxpayers and don’t give a dam just a horrible way to do business

Overall the experience was excellent. Plane was clean but more importantly quiet. Recently, I’ve noticed that Airbus planes seem quieter than their Boeing counterparts. I definitely prefer flying in an Airbus plane.

Book cheap flights from Incheon to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights from Incheon to Illinois found on KAYAK in the last 72 hours.
4/24Thu
1 stopUnited Airlines
38h 06mICN-ORD
4/26Sat
2 stopsUnited Airlines
41h 35mORD-ICN
$659
3/4Tue
2 stopsUnited Airlines
34h 00mICN-ORD
3/5Wed
1 stopUnited Airlines
28h 05mORD-ICN
$735
3/5Wed
1 stopAmerican Airlines
20h 06mICN-ORD
3/12Wed
1 stopAmerican Airlines
20h 55mORD-ICN
$840
3/5Wed
2 stopsAmerican Airlines
20h 02mICN-ORD
3/12Wed
1 stopAmerican Airlines
20h 55mORD-ICN
$845
4/15Tue
1 stopAir Canada
32h 46mICN-ORD
4/23Wed
1 stopAir Canada
34h 20mORD-ICN
$868
5/30Fri
1 stopAir Canada
25h 53mICN-ORD
6/2Mon
1 stopAir Canada
34h 30mORD-ICN
$869
3/18Tue
1 stopDelta
28h 15mICN-MDW
3/27Thu
1 stopDelta
17h 05mMDW-ICN
$1,214
3/18Tue
1 stopDelta
32h 45mICN-MDW
3/27Thu
1 stopDelta
17h 05mMDW-ICN
$1,215
3/12Wed
1 stopKorean Air
17h 01mICN-MDW
4/7Mon
1 stopKorean Air
16h 55mMDW-ICN
$1,318
3/10Mon
1 stopKorean Air
17h 01mICN-MDW
3/31Mon
1 stopKorean Air
17h 00mMDW-ICN
$1,333

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Incheon to Illinois found on KAYAK in the last 72 hours.
3/19Wed
2 stops
19h 49mICN-ORD
$427
3/10Mon
2 stops
24h 19mICN-ORD
$429
3/12Wed
1 stopAmerican Airlines
20h 28mICN-ORD
$469
4/18Fri
2 stopsUnited Airlines
37h 33mICN-STL
$512
5/14Wed
1 stopAmerican Airlines
20h 32mICN-ORD
$560
4/10Thu
3 stopsUnited Airlines
35h 52mICN-STL
$604
3/21Fri
1 stopDelta
29h 17mICN-MDW
$1,076
2/25Tue
1 stopKorean Air
18h 30mICN-MDW
$1,136
3/21Fri
1 stopKorean Air
17h 01mICN-MDW
$1,137
7/28Mon
1 stopDelta
27h 56mICN-MDW
$1,438

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Last minute flights from Incheon Intl to Illinois

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Incheon to Illinois that are departing in the next 10 days.
2/25Tue
multi-stopUnited Airlines
17h 03mICN-ORD
2/26Wed
multi-stopUnited Airlines
38h 20mORD-ICN
$582
2/24Mon
multi-stopUnited Airlines
41h 03mICN-ORD
2/26Wed
multi-stopUnited Airlines
29h 20mORD-ICN
$583
2/24Mon
multi-stopAmerican Airlines
29h 39mICN-ORD
3/23Sun
multi-stopAmerican Airlines
29h 30mORD-ICN
$1,022
2/25Tue
multi-stopAir Canada
38h 40mICN-ORD
3/27Thu
multi-stopAir Canada
33h 45mORD-ICN
$1,033
2/25Tue
multi-stopAir Canada
36h 56mICN-ORD
3/24Mon
multi-stopAir Canada
28h 55mORD-ICN
$1,040
2/24Mon
multi-stopAmerican Airlines
20h 04mICN-ORD
3/24Mon
multi-stopAmerican Airlines
33h 51mORD-ICN
$1,098
2/21Fri
nonstopKorean Air
13h 00mICN-ORD
2/25Tue
nonstopKorean Air
14h 50mORD-ICN
$1,296
2/21Fri
nonstopKorean Air
13h 00mICN-ORD
2/26Wed
nonstopKorean Air
14h 50mORD-ICN
$1,301
2/24Mon
multi-stopDelta
18h 51mICN-ORD
3/25Tue
nonstopDelta
14h 50mORD-ICN
$1,353
2/24Mon
nonstopDelta
13h 00mICN-ORD
3/28Fri
nonstopDelta
14h 50mORD-ICN
$1,969

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Everything you need to know for your flight from Incheon Intl to Illinois

Information on your arrival and departure airports

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