$99 Cheap Korean Air flights Ulsan (USN) to Jeju (CJU)

Finding cheap one-way Korean Air flights from USN to CJU from $99 on Expedia is simple — just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $196 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.

Start searching one to three months before your departure to score cheaper fares on Korean Air flights from Ulsan Airport (USN) to Jeju Intl. Airport (CJU). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic trips.*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.

Setting off from USN at 4:00PM UTC+9, the first Korean Air flight to CJU lands at 5:05PM UTC+9. Flying earlier in the day means you're less likely to experience delays.* Don't like early starts? The last Korean Air flight from USN to CJU departs at 4:00PM UTC+9 and touches down at 5:05PM UTC+9.*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 USN to CJU with Korean Air and look forward to a host of benefits 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.