Background: Bimaxillary protrusion is stated as a condition in which the upper and lower incisors are proclined and protrusive, which results in increased lip procumbency. The airway, also known as the respiratory tract, is a vital anatomical structure responsible for airflow during ventilation. Materials & methods: A total of 20 patients with presence of Class I Bimaxillary Dentoalveolar Protrusion were enrolled. Complete demographic and clinical details of all the patients was obtained. All the subjects belonged to the age group of 18 to 28 years. Treatment planning was done. The treatment plan included the extraction of all first mandibular and maxillary premolars, followed by incisor retraction with fixed appliances and maximum anchorage. Landmarks were evaluated. All the results were assessed using SPSS software. Results: Mean age of the patients was 21.5 years. Majority proportion of patients were males. Mean pretreatment and posttreatment H-RGN was 37.23 mm and 37.56 mm respectively. Mean pretreatment and posttreatment C3-H was 35.96 mm and 35.99 mm respectively. Mean pretreatment and posttreatment H1-H was 3.45 mm and 5.18 mm respectively. Significant improvement was seen in the position of hyoid bone post-treatment. Mean pretreatment and posttreatment SPP-SPPW was 14.96 mm and 13.19 mm respectively. Also; while evaluating the airway-dimension post-treatment in comparison to pre-treatment value, significant results were obtained. Conclusion: The extraction of premolars accompanied by significant retraction in cases of bimaxillary protrusion may lead to a reduction in airway dimensions and a change in the vertical positioning of the hyoid bone.