How does KAYAK find such low prices on flights from Illinois to Jeju City?

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 Illinois to Jeju City.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Jeju City?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Jeju City from 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 Illinois to Jeju City?

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 to Jeju City with an airline and back to Illinois with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Jeju City?

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 to Jeju City from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$660 CHEAP FLIGHTS from Illinois to Jeju City

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Flight Deals

Cheap Flights from Illinois to Jeju City

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Illinois to Jeju City

Tue, Feb 16 - Sat, Feb 20

2:10 pm - 6:40 amORD Chicago O'Hare Intl-CJU Jeju City

25h 30m1 stop Hong Kong Intl

7:45 am - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

19h 45m1 stop Hong Kong Intl

$1,263Cathay Pacific

Tue, Feb 16 - Sat, Feb 20

2:10 pm - 6:40 amORD Chicago O'Hare Intl-CJU Jeju City

25h 30m1 stop Hong Kong Intl

7:45 am - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

19h 45m1 stop Hong Kong Intl

$1,324Cathay Pacific

Tue, Feb 16 - Sat, Feb 20

2:10 pm - 6:40 amORD Chicago O'Hare Intl-CJU Jeju City

25h 30m1 stop Hong Kong Intl

7:45 am - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

19h 45m1 stop Hong Kong Intl

$1,419Cathay Pacific

Sun, Dec 13 - Sun, Dec 20

4:08 pm - 5:45 pmORD Chicago O'Hare Intl-CJU Jeju City

58h 37m2 stops Houston George Bush Intcntl Tokyo Narita

8:00 pm - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

31h 30m1 stop Hong Kong Intl

$2,072Multiple Airlines

Sun, Dec 13 - Sun, Dec 20

3:55 pm - 5:55 pmORD Chicago O'Hare Intl-CJU Jeju City

35h 00m3 stops Dublin Paris Charles de Gaulle Shanghai Pu Dong

12:10 pm - 7:02 amCJU Jeju City-ORD Chicago O'Hare Intl

33h 52m3 stops Nanjing Lukou Intl Xiamen Gaoqi Intl Los Angeles

$2,125Multiple Airlines

Mon, Dec 14 - Mon, Dec 21

6:47 pm - 8:05 pmORD Chicago O'Hare Intl-CJU Jeju City

34h 18m2 stops Seattle/Tacoma Intl Incheon Intl

7:45 am - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

19h 45m1 stop Hong Kong Intl

$2,174Multiple Airlines

Mon, Dec 14 - Mon, Dec 21

7:25 am - 9:55 amORD Chicago O'Hare Intl-CJU Jeju City

35h 30m3 stops Denver Intl San Francisco Incheon Intl

1:40 pm - 5:49 amCJU Jeju City-ORD Chicago O'Hare Intl

31h 09m3 stops Seoul Gimpo Intl San Francisco Las Vegas Harry Reid Intl

$2,261Multiple Airlines

Sun, Dec 13 - Sun, Dec 20

3:55 pm - 12:50 pmORD Chicago O'Hare Intl-CJU Jeju City

29h 55m3 stops Dublin Paris Charles de Gaulle Shanghai Pu Dong

8:00 pm - 2:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

33h 30m2 stops Hong Kong Intl Doha Hamad Intl

$2,312Multiple Airlines

Sun, Dec 13 - Sun, Dec 20

11:30 pm - 12:10 pmORD Chicago O'Hare Intl-CJU Jeju City

45h 40m2 stops Taipei City Taiwan Taoyuan Intl Busan Gimhae

9:05 pm - 7:35 pmCJU Jeju City-ORD Chicago O'Hare Intl

61h 30m2 stops Busan Gimhae Taipei City Taiwan Taoyuan Intl

$2,326Multiple Airlines

Sun, Nov 22 - Mon, Nov 30

2:10 pm - 6:40 amORD Chicago O'Hare Intl-CJU Jeju City

25h 30m1 stop Hong Kong Intl

7:45 am - 12:30 pmCJU Jeju City-ORD Chicago O'Hare Intl

19h 45m1 stop Hong Kong Intl

$2,373Cathay Pacific

Useful Info

Cheapest flight	$660

Flight from Chicago to Jeju City

How does KAYAK find such low prices on flights from Illinois to Jeju City?
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 Illinois to Jeju City.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Jeju City?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Jeju City from 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 Illinois to Jeju City?
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 to Jeju City with an airline and back to Illinois with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Jeju City?
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 to Jeju City from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.