Superman is a fictional superhero that was created by Jerry Siegel and Joe Shuster and first appeared in Action Comics #1 in 1938. The character has become a pop culture icon and is known for his incredible superhuman abilities, including super strength, flight, and incredible speed.

Superman’s maximum speed has varied throughout the character’s history, and it can depend on a variety of factors, including the context of the story and the interpretation of the character by different writers and artists. In general, however, Superman is known for being one of the fastest characters in the DC Comics universe, and his speed has been described as being close to that of light.
In the comic book series, Superman has been shown to be capable of traveling at incredible speeds, which are often measured in multiples of the speed of sound or even the speed of light. For example, in the 1996 comic book series “Superman: The Man of Steel,” Superman was shown to be able to fly at speeds up to Mach 10, or ten times the speed of sound, which is roughly 7,660 miles per hour. In the 2011 comic book series “Superman: Earth One,” Superman was shown to be able to fly at speeds up to Mach 25, or twenty-five times the speed of sound, which is roughly 19,075 miles per hour.
However, some comic book stories have portrayed Superman as being even faster than this. In the 1985 comic book series “Crisis on Infinite Earths,” Superman was shown to be able to travel faster than the speed of light, which would make him capable of moving through time and space. This ability was later retconned in the comics, but it demonstrates the extent of Superman’s incredible speed.
Superman’s speed has also been portrayed in various media adaptations, such as television shows, movies, and video games. In the 1990s animated television series “Superman: The Animated Series,” Superman was shown to be able to fly at speeds up to Mach 20, or twenty times the speed of sound, which is roughly 15,320 miles per hour. In the 2013 video game “Injustice: Gods Among Us,” Superman was shown to be able to fly at speeds up to Mach 500, or five hundred times the speed of sound, which is roughly 383,000 miles per hour.
It is important to note, however, that Superman’s speed can vary depending on the context of the story and the interpretation of the character by different writers and artists. Additionally, Superman’s speed can be affected by various factors, such as his level of exertion, his proximity to the Earth’s atmosphere, and the presence of Kryptonite, which can weaken his superhuman abilities.
In conclusion, Superman’s maximum speed has varied throughout the character’s history and can depend on a variety of factors. In general, however, Superman is known for being one of the fastest characters in the DC Comics universe, with his speed being described as close to that of light. Superman has been portrayed as being able to fly at speeds up to Mach 10, Mach 25, and even faster than the speed of light in various comic book stories and media adaptations. While Superman’s speed can vary depending on the context of the story and the interpretation of the character, his incredible speed is one of the defining characteristics of the iconic superhero.