Students' loyalty enhances sustainability and survival rate of higher education institutions. Successful university managers and higher education thrive to improve service quality and to build loyalty among local and international students to sustain under the globalization. The aim of this research was to investigate the mediation effect of some key long-term relationship antecedent variables such as trust, satisfaction, and commitment between the perceived service quality and student loyalty latent variables. The relationship between the constructs in the instrument was tested through Partial Least squares (PLS) structural equations methodology using SmartPLS 3 program. The results of this research show that perceived service quality impacts loyalty specifically through commitment. Students' loyalty is significantly influenced by commitment. However, student satisfaction has no significant direct effects on loyalty. Student trust has a negative effect on student loyalty so the results indicate that commitment fully mediates the effects of perceived service quality on student loyalty. Hence, university managers revitalize and sustain students' loyalty if along with high quality services they also stimulate bonds and students identification with the university by reinforcing emotional force such as commitment.