From Thalang Temple bus to Phuket airport, fly to Koh Samui airport, then taxi to Ko Samui. 2 h 36 min $128. From Ko Phuket taxi to Phuket, bus to Surat Thani, walk to Surat Thani, then bus and ferry to Koh Samui - Nathon. 6 h 12 min $37. From Lomprayah Bus Station bus and ferry to Koh Samui - Nathon. 6 h 45 min $39.