Willson TJ, Grady C, Braxton E, Weitzel E. Air travel with known pneumocephalus following outpatient sinus surgery. Aviat Space Environ Med 2014; 85:75–7. Background: Intracranial air is a common finding after many neurosurgical procedures and trauma to the head. In patients requiring transport via air to reach a destination there is risk of expansion of the intracranial air and development of neurological complications. Though relatively uncommon after functional endoscopic sinus surgery (FESS), pneumocephalus may be encountered. Case Report: We describe one of our patients in whom intracranial air was introduced during FESS. Following the procedure she required commercial air transportation from our center to her home. A 45-min commercial flight to the destination was safely completed without the patient experiencing any neurological sequellae. Discussion: This case highlights the controversy surrounding air travel with pneumocephalus and provides an example of safe commercial air travel after diagnosis of post-FESS pneumocephalus.