Koh Yao Sun Smile sails three routes between nine ports in Thailand, mostly Koh Phi Phi, Chong Lard (Koh Yao Yai) and Bang Rong (Phuket). From Koh Phi Phi: Chong Lard (Koh Yao Yai), Koh Yao Noi, Ao Nang and Railay Beach. From Bang Rong (Phuket): Chong Lard (Koh Yao Yai) and Laem Sai (Koh Yao Noi). From Phuket: Koh Lanta, Ao Nang and Railay Beach.