Jeju International Airport (CJU/RKPC) is the primary airport serving Jeju Island, South Korea's largest island and a major tourist destination. Located on the northwestern edge of Jeju City, it handles both domestic and international flights, consistently ranking among the busiest airports in South Korea. The airport serves as a key hub for domestic routes, particularly the Seoul–Jeju corridor, which is one of the world's busiest air routes by passenger volume. Low-cost carriers have a strong presence alongside full-service airlines, driven by high leisure travel demand to the island. Jeju Island's popularity as a holiday destination for South Koreans and international visitors alike ensures that the airport operates near or at capacity, prompting long-term discussions about expanding or supplementing its facilities.