Option in Koh Samui, ThailandAs the second most popular Thai island, Koh Samui is easy to get to via land, boat, or air. There are numerous boats from Surat Thani province on the Thai mainland as well as from neighboring islands Koh Phangan and Koh Tao. The Koh Samui international airport is served primarily by Bangkok airways, which flies to and from Koh Samui and seven domestic and international destinations.