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$1,774+ Cheap flights from Cheongju (CJJ) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/17. Fares are subject to change and may not be available on all flights or dates of travel.
CJJ — ORD
May 3 — May 101
Sat 5/3
Sat 5/10
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 April 28, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Popular in

August

Cheapest in

February

Average price

$1,232
Provider with most accurate pricing for Seoul (SEL)-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seoul (SEL)-Chicago (CHI) flights.
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($307 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Cheongju to Illinois

One-way flights from Cheongju to Illinois
Search for one-way flight options from Cheongju to Illinois. Find affordable one-way fares based on user searches. Data last updated April 28, 2025.

This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/177:30 amCJJ - ORD
1 stop20h 55mCathay Pacific
Deal found 4/28$1,774

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 April 28, 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

Tue 6/17

7:30 am-2:25 pm

1 stop20h 55m

$1,774

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

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 April 28, 2025.
Cathay Pacific
7.5
Good
852 reviews

Comfort

7.6

Food

7.2

Boarding

7.9

Entertainment

7.7

Overall

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2025

BOS - HKG

It would have been nice to understand the dates of takeoff! We missed our flight and now have to pay an extra $454.00 Very stressful and not easy to check in or get information
Cathay Pacific
7.5
Good
852 reviews
Cathay Pacific
7.5
Good
852 reviews

Comfort

7.6

Food

7.2

Boarding

7.9

Entertainment

7.7

Overall

7.5

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Anonymous,Mar 2025

BOS - HKG

It would have been nice to understand the dates of takeoff! We missed our flight and now have to pay an extra $454.00 Very stressful and not easy to check in or get information

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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