Koh Yao Yai island (big long island) is twice as big as its sister island, Koh Yao Noi, and is the largest island in Phang Nga Bay. Located just South of Koh Yao Noi by less than 3 kilometers, Koh Yao Yai is about 25 km. long, which is half as long as Phuket Island from north to south. This island is located northwest of Koh Phi Phi Islands and is only about 22 km. away.
If you’re going to Koh Yao Yai, there are package tours you can purchase. A ferry, speedboat and long tail boats all go from Phuket Island to Yao Yai Island. Speedboats leave from Rassada Pier and Ao Chalong Pier. To reach Rassada Pier by vehicle from Patong Beach, drive east on Highway 4029 over the mountain toward Phuket Town and then to Anuphas Phuket Karn Road down to Rassada Pier.