Among many studies focusing on the effect of learner and instructional variables on course outcomes, few studies have investigated the learners' study habits and the mediating mechanisms among the learner and instruction variables in their influence on course outcomes. This study examined differences in learner satisfaction and learning outcomes based on learner characteristics and study habits and the effects of instructional and learner variables on the course outcomes for an online course. Data analyses revealed the quality of online instructor, learning motivation, and learning involvement as significant variables influencing the course outcomes of the online learning program.