How long does it take to fly to Cheongju?

Flight times from Illinois to Cheongju vary, but if you’re flying out of Chicago and flying into Incheon Intl Airport (one of the most popular routes), then the duration is 16h 45m on average. Another popular route from Illinois to Cheongju is flying from Moline to Incheon Intl Airport, which will take roughly 25h 40m. Keep in mind that layovers or delays could extend your travel time.

When did momondo last update prices for flights from Illinois to Cheongju Airport?

Prices for flights from Illinois to Cheongju Airport are refreshed on a daily basis.

How old do you have to be to fly from Illinois to Cheongju Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Cheongju Airport.

What documentation or ID do you need to fly to Cheongju Airport?

The travel and health documents you'll need for your trip to Cheongju Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Cheongju Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$547 Cheap Flights from Illinois to Cheongju in 2025/26

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Find the cheapest flights from Illinois to Seoul

Round-trip

One-way

Cheap round-trip flights

10:20 am - 9:30 pmORD-CJJ

20h 10m1 stop

7:25 am - 11:42 pmCJJ-ORD

31h 17m3 stops

$1,505Multiple Airlines

Find Deal

Fri, Nov 7 - Fri, Nov 14

11:30 pm - 5:45 amORD-CJJ

39h 15m1 stop

9:05 am - 7:35 pmCJJ-ORD

25h 30m2 stops

$1,572Multiple Airlines

Find Deal

Fri, Nov 7 - Fri, Nov 14

10:20 am - 9:30 pmORD-CJJ

20h 10m1 stop

7:25 am - 1:40 pmCJJ-ORD

21h 15m1 stop

$1,745Multiple Airlines

Find Deal

Fri, Nov 7 - Fri, Nov 14

7:15 am - 9:30 pmORD-CJJ

23h 15m2 stops

9:45 am - 6:25 amCJJ-ORD

35h 40m3 stops

$1,835Multiple Airlines

Find Deal

Fri, Nov 7 - Fri, Nov 14

Fly from

Fly to

Route

Depart

Return

Price

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 11/7

10:20 am-9:30 pm

1 stop20h 10m

Cheongju

Fri 11/14

7:25 am-11:42 pm

3 stops31h 17m

$1,505

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 11/7

11:30 pm-5:45 am

1 stop39h 15m

Cheongju

Fri 11/14

9:05 am-7:35 pm

2 stops25h 30m

$1,572

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 11/7

10:20 am-9:30 pm

1 stop20h 10m

Cheongju

Fri 11/14

7:25 am-1:40 pm

1 stop21h 15m

$1,745

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 11/7

7:15 am-9:30 pm

2 stops23h 15m

Cheongju

Fri 11/14

9:45 am-6:25 am

3 stops35h 40m

$1,835

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 12/5

8:00 am-5:45 am

3 stops54h 45m

$547

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Sat 12/6

8:00 am-5:45 am

3 stops54h 45m

$602

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Sat 12/6

7:10 am-5:45 am

2 stops55h 35m

$774

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 12/5

7:10 am-5:45 am

2 stops55h 35m

$777

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Sat 12/6

11:30 pm-5:45 am

1 stop39h 15m

$996

ChicagoCheongju

ORD - CJJ

ORDCJJ

Chicago O'Hare Intl

Fri 12/5

11:30 pm-5:45 am

1 stop39h 15m

$997

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Illinois to Cheongju

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Airlines

Other information

What airlines fly to Cheongju?

Korean Air, Air Canada and Delta are the top three most popular airlines that fly to Cheongju from Illinois according to our data. Korean Air is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Cheongju. Keep in mind that there are 9 different airlines that fly to Cheongju on a routine basis, so you have a few additional options to choose from.

Cheap Illinois to Cheongju flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to Cheongju

Direct flights	None

There are no direct flights from Illinois to Cheongju. There are no popular flight routes from Illinois to Cheongju.

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When did momondo last update prices for flights from Illinois to Cheongju Airport?
Prices for flights from Illinois to Cheongju Airport are refreshed on a daily basis.
How old do you have to be to fly from Illinois to Cheongju Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Illinois to Cheongju Airport.
What documentation or ID do you need to fly to Cheongju Airport?
The travel and health documents you'll need for your trip to Cheongju Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Cheongju Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Cheongju?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Illinois to Cheongju for you.

Can I find flights from Illinois to Cheongju with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Cheongju flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Cheongju?

momondo provides multiple filters to help you find the best flight to Cheongju from Illinois. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Illinois to Cheongju right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Illinois to Cheongju flights. All you need is a valid email address and we will do the rest; it is that quick and easy.