Why can Superman fly?

because Clark ken't!

According to DC comics, when he was created in 1937, Superman, Kal-El, was born on Krypton, a large planet with a red sun. When he landed on Earth as a baby, the Earth's lower gravity combined with our yellow sun's radioactivity gave him his super powers, including the ability to fly.

its called blue screen i think. They put a man aka superman on a stage set where the background is completly blue. The camera takes the shot , then they super impose that background of the sky on everything thats in that blue background. It gives the impression hes flying. Then again i bet you still believe in santa

Because he's superman and superman is a superhero and superhero's have super powers and and one of superman's super powers is flying... Do u get it??

The mechanism by which he flies is unknown, but some suggestions have been a field of energy allowing unconscious manipulation of gravity or defract/reflect of gravity due to unidentified Kryptonian organs affected by a yellow sun, or psionic manipulation of a personal anti-gravitational aura, which is also caused by his Kryptonian cells and a yellow sun.

MOM Mind Over Matter

Now ask why Neo from the matrix can fly and you might get an interesting answer :)

Well he isn't human, and he utilizes two sciences known as cat aerodynamics and butterology, since buttered bread always lands buttered side down, and cats always land on their feet, what he has done is tied a piece of bread, buttered side up, onto a cats back and put it where the stomach is in humans. By changing the angle and distance of the bread and cat, he can direct himself in flight.

Because of flying he called as Superman

otherwise he call as Walkman

Cause he is superman.

because Aladin gave him a magic cape that was made from the magic carpet. It allows him to levitate.

Eats a LOT of baked beans