Sustainable development is an important topic in today's organizations, especially in the tourism sector. In this paper, a comparative analysis method was used to compare the sustainable development communication strategy of Valamar and Hyatt. The scope of activity of both hotels was explored, the effort towards sustainability and socially responsible business was analyzed and the way in which both companies communicate with their public was compared across all selected channels. All existing programs and initiatives of Valamar and Hyatt towards the betterment of the society and communities in which they operate were elaborated, covering the economic, social and environmental aspects of sustainable development. It was concluded that through all three aspects, effort was visible and that both companies pay a lot of attention to important issues and problems, care for their employees, guests and vulnerable groups in the society, turn to renewable energy sources and work to reduce their environmental impact. Both Valamar and Hyatt are good examples of hotels that care about local communities and the environment, they should continue their efforts, be prepared for new challenges in the area and further work on their strategies of communication with their target audiences.