A ferry takes passengers from Donsak pier in Surat Thani to Koh Samui, which has benefited from Bangkok Airways’ flight expansion.a Increased air services are pushing Koh Samui into a year-round tourist destination, says hospitality market researcher and consultant C9 Hotelworks Co. The flight expansion by Bangkok Airways and the emergence of Surat Thani as a secondary aviation gateway to the South have dramatically benefited tourism activities on the resort island of Samui.