This study explored the attitudes of hotel managers in Phuket, Thailand, in an attempt to identify whether their attitudes influence their utilization of environmental sustainability practices. Due to the increasing number of visitors to Phuket, Thailand, the consumption of natural resources has increased in the region, causing serious environmental problems. A sustainable way forward is needed for the tourism industry in the region in order to maintain quality of service while reducing environmental damage. The data analyzed in this study came from self-administered questionnaires that surveyed hotel managers in Phuket, Thailand, with a sample of 243 respondents. Research results revealed three dimensions of hotel manager attitude toward environmental sustainability practices, including operational management, social obligation, and sustainability strategy and policy. Furthermore, three constraints on the implementation of environmental management practices were identified: lack of support, perceived difficulty, and lack of demand. The attitudes of hotel managers regarding specific factors and barriers are also presented in this study. The results of this study show that hotel managers overall possess positive attitudes toward environmental sustainability practices. Finally, the findings reveal that hotel managers’ attitudes toward sustainability practices depend on their social demographics, the type of hotel they operate, their degree of ownership of the hotel, whether or not their hotel was affected by the 2004 tsunami, and the year their hotel was built. The results of this study suggest that it is necessary for hotel managers to understand the importance of environmental sustainability practices because this understanding can help motivate them in implementing sustainability practices in their hotels. Furthermore, it can guide hotel managers when deciding which environmental policies are suitable for their iv hotels. Lastly, the study demonstrated that in order for hotels to become more sustainable, support is needed from government or hotel associations to provide education and training for the hotel managers.