"Non-propellant Propulsion for Space Flight" gives brief introductions of space environments, two major orbital transfer methods, various unique and breakthrough propulsive technologies, and presents two of my proposed propulsive ideas with fundamental physics and understandable explanations with mathematical formula at space travels. This book provides various unconventional propulsive technologies to readers with engineering and non-engineering backgrounds to open thoughts other than the traditional views for planetary travels in the solar system. This book would encourage readers with engineering and non-engineering backgrounds to have hope for advanced and unique propulsive technologies to travel other planets through introductions of breakthrough propulsive technologies, and inspire students at high schools to establish strong interests to pursue their degrees in the STEM (Science, Technology, Engineering and Mathematics) fields after enrolled into colleges and universities.