Thai Smile Travel & Tour Koh Chang

Thai Smile Travel and Tour on Lonely Beach is one of the more established tour agencies on Koh Chang, with years of operation and relationships with the island's best boat captains and guides. Snorkeling day trips from 900 baht, private boat charters available. They run their own small fleet for some excursions, which gives them more quality control than agencies that just resell. The staff is knowledgeable about sea conditions and can advise on the best days for snorkeling (visibility varies significantly by season and tide).