$718 Cheap Korean Air flights San Francisco (SFO) to Jeju (CJU)

Landing cheap one-way Korean Air flights from SFO to CJU from $718 on Expedia is simple --- just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $995 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

To grab cheap flights from SFO to CJU with Korean Air, start your search about one month before your intended departure. You can save 17% when you lock in your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Want another tip? Booking on Sunday can lead to average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

Find Korean Air's earliest flights from SFO to CJU by using our "Morning" and "Early Morning" filters. Not only will you arrive sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

Depart from SFO to CJU with Korean Air and look forward to a range of perks including a 5-star airline rating. When booking through Expedia as a Korean Airlines Skypass and One Key™ member, you can also earn OneKeyCash™* to redeem on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.