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.

$1,228 CHEAP FLIGHTS from Illinois to Jeju City

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Cheap Flights from Illinois to Jeju City

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

Round-trip

Recent round-trip flight deals from Illinois to Jeju City

Thu, Oct 8 - Fri, Oct 23

4:15 pm - 6:30 amORD Chicago O'Hare Intl-CJU Jeju City

24h 15m1 stop Hong Kong Intl

7:30 am - 1:55 pmCJU Jeju City-ORD Chicago O'Hare Intl

20h 25m1 stop Hong Kong Intl

$1,228Cathay Pacific

Thu, Oct 8 - Fri, Oct 23

4:15 pm - 6:30 amORD Chicago O'Hare Intl-CJU Jeju City

24h 15m1 stop Hong Kong Intl

7:30 am - 1:55 pmCJU Jeju City-ORD Chicago O'Hare Intl

20h 25m1 stop Hong Kong Intl

$1,229Cathay Pacific

Sun, Oct 18 - Thu, Oct 22

4:15 pm - 6:30 amORD Chicago O'Hare Intl-CJU Jeju City

24h 15m1 stop Hong Kong Intl

7:30 am - 1:55 pmCJU Jeju City-ORD Chicago O'Hare Intl

20h 25m1 stop Hong Kong Intl

$1,263Cathay Pacific

Wed, Oct 7 - Fri, Oct 23

12:30 am - 8:00 amORD Chicago O'Hare Intl-CJU Jeju City

41h 30m2 stops Taipei City Taiwan Taoyuan Intl Busan Gimhae

6:20 pm - 8:45 pmCJU Jeju City-ORD Chicago O'Hare Intl

40h 25m2 stops Busan Gimhae Taipei City Taiwan Taoyuan Intl

$1,355Multiple Airlines

Thu, Oct 15 - Fri, Oct 23

12:30 am - 8:00 amORD Chicago O'Hare Intl-CJU Jeju City

41h 30m2 stops Taipei City Taiwan Taoyuan Intl Busan Gimhae

9:05 pm - 8:45 pmCJU Jeju City-ORD Chicago O'Hare Intl

37h 40m2 stops Busan Gimhae Taipei City Taiwan Taoyuan Intl

$1,488Multiple Airlines

Tue, Feb 16 - Sat, Feb 20