Iran’s Tehran Flight Information Region remains only partially open in October 2026, with the western sector largely closed to overflights and very few international carriers operating due to persistent military tensions. A brief near-five-hour closure occurred in early October amid U.S.–Iran friction and anti-government protests, after which authorities reopened the airspace to permitted flights. Multiple regulators, including EASA through mid-November, France, Germany, and the FAA through late 2027, continue advising against operations because of risks from air-defense misidentification and regional strikes. U.S. sanctions imposed in September further reduced commercial activity by prompting foreign airports and carriers to suspend routes. These security and regulatory factors shape trader assessments of whether a qualifying general closure will occur by specific resolution dates.