Travel agencies, by timely and correct application of technology in business, increase and improve their offer, and become more and more accessible to users. Quality connection between the user and the travel agency is of great importance, so everything that can ensure and improve the connection must be applied in business. Thesis deals with the design and development of a logical model of the information system for the travel agency Klara Tours d.o.o. from Medjugorje. Klara Tours d.o.o. is a privately owned company, founded in 2016, which deals with domestic and international travel organization and passenger transport. The mission, vision, functional and organizational structure of the travel agency were determined by the method of analysis of the content of documents. In accordance with the above, the business system processes were determined by the interview method, based on a process model was formed by applying a data flow diagram. The data model was created using the ER model or conceptual data model as a representation of interconnected data in the business system of a travel agency, and was translated into a relational data model, which shows a logical data model for a travel agency.