Orthognathic surgery is a well-established surgical intervention designed to correct skeletal and dentofacial deformities that cannot be adequately managed by orthodontic treatment alone. The procedure aims to improve functional occlusion, facial aesthetics, airway function, speech, mastication, and psychosocial well-being. Advances in surgical techniques, digital planning, three-dimensional imaging, and fixation systems have significantly enhanced treatment outcomes and patient satisfaction. This review evaluates the clinical outcomes of orthognathic surgery by examining functional, aesthetic, psychological, airway, and quality-of-life improvements. The article also discusses complications, long-term stability, technological innovations, and future directions in orthognathic surgery. Current evidence demonstrates that orthognathic surgery offers substantial benefits for appropriately selected patients, resulting in improved oral function, facial harmony, and overall quality of life.