The duration of a B.Sc. Aeronautical Science course can vary depending on the country’s education system. In most European and Asian countries, the course is usually three years, while in countries like the U.S. and Canada, it often takes four years. Factors like semester-based vs. annual-based systems and the inclusion of practical training or internships may further influence the course length. Some countries may require an additional licensing or certification year, extending the duration.