The aim of this study which takes the theoretical backgrounds from the sustainability literature is to investigate the structures which may have an effect on the sustainable usage of online learning environments with the students' perspectives and to contribute the literature about providing the sustainability of these environments' usage. A qualitative study is conducted for this purpose and the study is designed with phenomenological approach. The research data is acquired from the interview records of nine students whom take an online course of Hacettepe University, Faculty of Education. In order to access to the qualitative findings, a qualitative interview form was prepared and interviews were conducted with students in the specified time. Research findings revealed that the quality of information, impact of environment, environment variables and students' own internal structures are the categories which have an effect on the sustainability of online learning environments. Under these categories, codes such as information quality, usability, system quality, service quality, satisfaction, attitudes, interaction preferences, teacher requests, routing requirements and flexibility are reached. In line with the findings and conclusions of the research, suggestions were made for the study and practice.