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$2,325+ Cheap flights from Cheongju (CJJ) to Illinois

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
CJJ — ORD
abr 7 — abr 141
seg 4/7
seg 4/14
1 adult, Economy
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Cheap flight deals from Cheongju to Illinois

Keep the following information in mind while searching for Cheongju to Illinois flight deals. Data was last updated abril 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$2,325
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$1,223
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Seoul (SEL)-Chicago (CHI) flights.
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From Cheongju to Illinois
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Highest demand for flights based on searches. 22% potential increase in price ($352 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($54 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Cheongju to Illinois

Cheapest flights from Cheongju to Illinois
Explore the most affordable flight options available from Cheongju to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 2, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 6/2310:05 amCJJ - ORD
2 stops42h 20mMultiple Airlines
qui 6/264:00 pmORD - CJJ
1 stop24h 45mMultiple Airlines
Deal found 4/1$2,325
This Mytrip deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 6/235:20 pmCJJ - ORD
2 stops30h 20mKorean Air
qui 6/2612:30 pmORD - CJJ
2 stops30h 00mKorean Air
Deal found 4/1$2,400

Cheapflights Fare Finder

Customize your flight search to find flights from Cheongju 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, Cheapflights users made 2,558,603 searches. Data last updated abril 2, 2025.
Use the filters below to find and compare flights from Cheongju to Illinois that are best for you.

Fly from

Cheongju

Fly to

Illinois

Route

Depart

Return

Price

CheongjuChicago

CJJ - ORD

CJJORD

Cheongju

seg 6/23

10:05 am-2:25 pm

2 stops42h 20m

Chicago O'Hare Intl

qui 6/26

4:00 pm-6:45 am

1 stop24h 45m

$2,325

CheongjuChicago

CJJ - ORD

CJJORD

Cheongju

seg 6/23

5:20 pm-9:40 am

2 stops30h 20m

Chicago O'Hare Intl

qui 6/26

12:30 pm-8:30 am

2 stops30h 00m

$2,400

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Best time to book a flight from Cheongju to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Cheongju with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Cheongju to Illinois

What is the cheapest month to book a flight from Cheongju to Illinois?

Currently, August is the cheapest month in which you can book a flight from Cheongju to Illinois (average of $245). Flying from Cheongju to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated abril 2, 2025.
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.
Korean Air
8.4
Very good
1,051 reviews
Korean Air
8.4
Very good
1,051 reviews

Overall

8.4

Crew

8.7

Food

8.1

Comfort

8.3

Boarding

8.5

Entertainment

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Feb 2025

ATL - SBN

Regional jets are small and uncomfortable. When flying in or out of South Bend airport, that's usually what I'm on. It's the price one pays for the great convenience of using a small airport (cheap parking, no lines). The CRJ900 has engines attached to the fuselage near the rear of the plane. So, very loud in the back of the plane, and I happened to have the far back corner that also had no window. Oh well, a short flight and pleasant neighbor and cheerful attendant.

Related info for your journey

Find useful and relevant information for your journey from Cheongju to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Cheongju to Illinois?

    Most people fly from Cheongju (CJJ) if they book a flight from Cheongju to Illinois. Cheongju is conveniently located just 5.5 mi from Cheongju’s city center.

  • Can I find deals for flights from Cheongju to Illinois that include hotel bookings?

    Yes. In addition to deals on Cheongju to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Cheongju to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cheongju to Illinois.

  • Can I find deals for business class flights from Cheongju to Illinois?

    Yes. Cheapflights offers flight deals from Cheongju to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cheongju to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Cheongju to Illinois (average of $245). Flying from Cheongju to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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