Introduction: Normal airway is one of the important factors for the normal growth of the craniofacial structure. The form and function of the pharynx have been an interest to orthodontic research. Cephalometry enables analysis of dental, skeletal and soft tissue anomalies; it also helps to assess the airway morphology. Method: This retrospective study includes lateral cephalogram of 300 healthy individuals in which 150 males and 150 females with class I malocclusion from South India and patients above the age of 20 years were taken for the study. Results: The mean upper and lower airway values for male patients were 13.61mm and 11.31mm and for female patients, it was 13.5 mm and 11.50 mm. Conclusion: The study concludes that there is a difference between upper and lower airway width among Caucasians and South Indian populations with Class I skeletal patterns. The study also suggests that there is no difference between upper and lower airway width among male and female South Indian populations.