I have found two answers.
1. horizontal speed of about 55mph, stoop speed of up to 270 mph
www.extremescience.com/fastinworld.htm
2. stoop speed of up to 242mph
wolf21m.blogspot.com/2008/01/peregrine-falcon-speed.html
Peregrine Falcon
The peregrine falcon can dive at more than 200 miles per hour
200 miles per hour
The fastest recorded speed of a Peregrine falcon is 389 kilometres per hour, which is equal to 242 miles per hour. This is not its cruising speed, but its diving speed, which is when it makes maximum use of its long wingspan, streamlined shape and powerful chest muscles.
Your peregrine thoughts have illumined my mind.The Peregrine Falcon (Falco peregrinus) is also known as the Duck Hawk, in America.The peregrine may reach a speed of 200 miles per hour, in a dive.
When diving to capture prey, the peregrine falcon can exceed speeds of 200 miles per hour (322 kilometres per hour).
The highest velocity of a bird is approximately 200 miles per hour. This speed is reached by the peregrine falcon when it dives for hunting purposes.
The peregrine falcon is renowned for being the fastest bird and one of the fastest animals on the planet, capable of reaching speeds of up to 240 kilometers per hour (about 149 miles per hour) during its characteristic hunting stoop (high-speed dive). In level flight, its speed is significantly lower, typically around 55 to 65 kilometers per hour (34 to 40 miles per hour). This incredible speed makes it an exceptional predator in the avian world.
200 miles per hour
The Peregrine falcon is renowned for its incredible speed, particularly during its hunting stoop (high-speed dive), where it can reach speeds of over 240 miles per hour (386 km/h). When flying horizontally, it can still achieve speeds of around 40 to 60 miles per hour (64 to 97 km/h). Therefore, in a minute, a Peregrine falcon can cover a significant distance, depending on its flight mode.
The fastest bird is the peregrine falcon, which can reach speeds of over 240 miles per hour (386 kilometers per hour) during its characteristic hunting stoop (high-speed dive). In level flight, the common swift is among the fastest, reaching speeds of around 69 miles per hour (111 kilometers per hour). The peregrine falcon's speed makes it not only the fastest bird but also the fastest animal on the planet.
The peregrine falcon is renowned for its incredible speed, especially during its hunting stoop (high-speed dive), where it can reach speeds of over 240 miles per hour (386 kilometers per hour). When translated to a per meter basis, this equates to approximately 107 meters per second during its dive. However, in level flight, they typically fly at speeds of around 40 to 55 miles per hour (64 to 89 kilometers per hour), or about 18 to 24 meters per second.