It’s hard to be 100% certain what the fastest plane in the world is, because the answer is probably a military secret, but it’s widely accepted that the answer is that the world’s fastest airplane was the Lockheed SR-71 also called the Blackbird which is rumoured to have reached a speed of 2,193.2 miles (3,529.6 km) per hour. Imagine that eh
The Lockheed SR-71 was a jet-powered, piloted plane that was used to fly reconnaissance missions for the United States Air Force from 1964 until 1998. It is said to have reached an altitude of 16.1 miles (25.9 km). Some people have speculated that the Blackbird’s true top speed and other capabilities have never been revealed because of course it’s a military plane.