If Barry Allen runs practically at the speed of light, he effectively has the relative mass of a white dwarf star. If he puts all that energy into an attack, he produces an Infinite Mass Punch; a form of attack that can knock someone like Superman across continents -- it can certainly wound him, if not kill him.

Can The Flash beat Superman?

The Infinite Mass Punch uses the Flash's extreme velocity, barraging the opponents with punches so potent they could disintegrate on impact. And here's the thing – only one of those punches was able to knock Superman out. The Flash claims he is fast enough to do a billion of those in a second.

Is the flash more powerful than Superman?

The Flash is actually one of the most powerful heroes in DC, capable of doing things Superman has never even dreamed of. For over 60 years of comics, Superman has been considered the most powerful DC superhero, demonstrating great feats of strength and being able to take on any threat that comes his way.