Travel from Koh Tao to Don Sak Pier in Surat Thani by Seatran Discovery ferry in air-conditioned comfort. Make your own way to the meeting point at Seatran Discovery office at Mae Haad Pier on Koh Tao 30 minutes before scheduled departure. The bus drive two route , From Airport go to Surat thani City driving about half hour (20 km) and From Airport to Do Sak Pier driving about 1 hr. (100 km) Time ferry railing from Don sak pier to Ko samui : 06.00-19.00. So that U must Check time of your flight arrive to Surat thani airport, cause of if u arrive after 17.30 u will miss last ferry ... Book a Donsak Ferry. Donsak ferry port in Thailand is served by a number of ferry routes with crossings to Koh Phangan (Thong Sala Pier) & Koh Tao (Mae Haad Pier) available. With a selection of up to 28 Sailings Weekly, the port of Donsak connects Thailand with Koh Phangan Island & Koh Tao Island.