What is the weakest air force in the world? There is no easy way to answer that question, as many countries lack air forces entirely or have only a limited number of civilian-type aircraft in service. Still, this article will discuss some air forces and why they are weak. While Iran, North Korea, and Cuba may have aging museum air forces (relics of once-powerful air forces), they are neither the smallest nor the weakest in the world. At the other end, the most powerful air force is generally considered the US Air Force, followed by the US Navy/Marine Corps air arms.