The cheapest times to fly from ORD to CJU are

  • February 12th to March 4th (except the week of February 19th)
  • June 11th to October 21st (except the weeks of July 9th, August 6th, and September 10th)
  • November 12th to January 28th (except the weeks of November 19th, December 17th, and December 24th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from ORD to CJU is late September. Prices can be as high as $10104 for Saturday flights during late October to early November, or as low as $1120 for Thursday flights around late September.


When to Fly to Jeju-si

Flying from Chicago, IL (ORD) to Jeju (CJU) will usually cost between $1246 to $5646 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $1840. Due to high demand the most expensive time to fly is late October to early November, with an average price of $5776. Planning your trip to low-cost times can easily save you $3936 on economy flights and even more on first-class flights. Generally, any price below $2986 can be considered a good price for a round-trip ORD to CJU flight.

See below for a graph of average weekly prices for the ORD to CJU route. All prices are for round-trip tickets in USD.

ORD to CJU Flight Prices

Compared to other flights, the ORD to CJU flight is more expensive than the average and costs more than the average flight leaving from Chicago. The average price per mile (for a direct flight) is $0.27, which is below average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to CJU, and Tuesday the cheapest day to fly back into ORD. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $1550 (40%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $2202. Return trip prices are from the CJU to ORD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from ORD to CJU can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 13 hour 11 minutes may not be realistic.


Flight Hacking ORD to CJU

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from ORD to CJU — but Champion Traveler does!

Hack #1: Beijing (ORD > PEK > CJU)

  • Price for both tickets: $1004
  • Average savings: $1983 (66.39%)

See ORD to PEK flights

Hack #2: Shanghai (ORD > PVG > CJU)

  • Price for both tickets: $1084
  • Average savings: $1902 (63.7%)

See ORD to PVG flights

Hack #3: Kuala Lumpur (ORD > KUL > CJU)

  • Price for both tickets: $1137
  • Average savings: $1849 (61.92%)

See ORD to KUL flights


Flight Questions Answered

Still have questions about flying from ORD to CJU? We’ve got answers.

Which airlines fly this route?

You can find 8 major airlines flying this route most often: Air China, Asiana, Cathay Pacific, China Eastern, China Southern, Delta, JAL, Korean Air, and potentially more during busy seasons.

How far away is it from Jeju International Airport to Chicago O’Hare International Airport?

The distance between the two airports is roughly 6782 miles or 10915 kilometers.

How long does it take to fly from ORD to CJU?

The real-world flight time for a nonstop ORD to CJU flight is about 13 hour 11 minutes.

How many flights go between Chicago, IL and Jeju?

It depends on the day of the week and the date, but a typical day might have around 20 available flights from ORD to CJU.


Airport Location Info


Departing Airport

Origination code ORD
Origination airport name Chicago O’Hare International Airport
City Chicago, IL
Country the United States
Latitude 42
Longitude -87.9

Return Airport

Destination code CJU
Destination airport name Jeju International Airport
City Jeju
Country South Korea
Latitude 33.5
Longitude 126.5


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.