Learning management system (LMS) helps higher learning institutions to manage their instructional resources and complement their traditional way of teaching. Although LMS survives via students' and instructors' use, its adoption is initiated by the students' satisfaction. Thus, the objectives of this study are to examine the level of LMS satisfaction among university students in a blended learning program and to investigate the factors that may impact their satisfaction. A quantitative research approach via a questionnaire was used in the study. The subjects consisted of undergraduate students in a public university in Yemen. A total of 174 participants were surveyed using a questionnaire. Descriptive statistics and multiple linear regression were employed. The results show that the participants have a high level of satisfaction of LMS usage in a blended learning environment. Also the findings indicated that Instructor Attitude, Classmates Attitude, Course Quality, Management Support, and System Quality are significant predictors to students' satisfaction of LMS. Therefore, this study has identified these significant factors in planning, designing and implementing a blended learning to promote and improve students' learning satisfaction.