The cheapest times to fly from SJC to CJU are

  • January 1st to April 29th (except the week of April 9th)
  • August 13th to August 26th
  • September 17th to September 30th
  • October 29th to December 9th

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 SJC to CJU is early March. Prices can be as high as $5704 for Thursday flights during late July, or as low as $1121 for Tuesday flights around early March.


When to Fly to Jeju-si

Flying from San Jose, CA (SJC) to Jeju (CJU) will usually cost between $1163 to $3323 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early March with an average ticket price of $1404. Due to high demand the most expensive time to fly is late July, with an average price of $2580. Planning your trip to low-cost times can easily save you $1176 on economy flights and even more on first-class flights. Generally, any price below $1743 can be considered a good price for a round-trip SJC to CJU flight.

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

SJC to CJU Flight Prices

Compared to other flights, the SJC to CJU flight is more expensive than the average and costs slightly more than the average flight leaving from San Jose. The average price per mile (for a direct flight) is $0.18, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Thursdays are the most expensive days to fly to Jeju-si, and Sundays are the most expensive days to return to San Jose. Selecting flights on the least expensive days could save you up to $767 (28%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1560. Return trip prices are from the CJU to SJC 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 SJC 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 11 hour 31 minutes may not be realistic.


Flight Hacking SJC 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 SJC to CJU — but Champion Traveler does!

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

  • Price for both tickets: $959
  • Average savings: $785 (45.01%)

See SJC to PEK flights

Hack #2: Hong Kong (SJC > HKG > CJU)

  • Price for both tickets: $1012
  • Average savings: $732 (41.97%)

See SJC to HKG flights

Hack #3: Shanghai (SJC > PVG > CJU)

  • Price for both tickets: $1021
  • Average savings: $722 (41.42%)

See SJC to PVG flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 10 major airlines flying this route most often: Air Canada, Alaska, American, ANA, Asiana, Cathay Pacific, China Southern, Delta, JAL, Korean Air, and potentially more during busy seasons.

How far away is it from Jeju International Airport to Norman Y. Mineta San Jose International Airport?

The distance between the two airports is roughly 5855 miles or 9423 kilometers.

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

The real-world flight time for a nonstop SJC to CJU flight is about 11 hour 31 minutes.

How many flights go between San Jose, CA and Jeju?

It depends on the day of the week and the date, but a typical day might have around 21 available flights from SJC to CJU.


Airport Location Info


Departing Airport

Origination code SJC
Origination airport name Norman Y. Mineta San Jose International Airport
City San Jose, CA
Country the United States
Latitude 37.4
Longitude -121.9

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.