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$1,147+ 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 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
CJJ — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 September 11, 2025.

Round-trip from

$1,147
(Trip.com)

Popular in

January

Cheapest in

February

Average price

$1,581
From Cheongju to Illinois
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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 September 11, 2025.

This Trip.com deal was found by Cheapflights users on 9/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/268:45 amCJJ - ORD
2 stops35h 37mMultiple Airlines
Sun 11/28:00 amORD - CJJ
2 stops40h 00mMultiple Airlines
Deal found 9/11$1,147

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 September 11, 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

Sun 10/26

8:45 am-6:22 am

2 stops35h 37m

Chicago O'Hare Intl

Sun 11/2

8:00 am-3:00 pm

2 stops40h 00m

$1,147

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

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.

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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