T’way Air is one of South Korea’s representative Low-Cost Carriers (LCC). Formerly known as Hansung Airlines, it currently operates domestic routes within Korea as well as expanding its overseas routes to Japan, China, Southeast Asia, Russia, Central Asia, Oceania, and other diverse destinations. Although there is currently no direct route from Jeju to Singapore, business class seats are selling well. Additionally, there are discounted domestic connecting flights to Jeju.