The superheroes of the comic books are known for flying. Yet upon reflection I find the list of those who fly is curiously short. I will try to compile a list here, and hope for some help to fill it out.
Superman. The premier of flight. We will include all Kryptonians such as Supergirl, Superman's dog Krypto, etc.
The Human Torch.
Green Lantern, with a magic ring. Or technological ring. See Arthur C. Clarke. Anyway.
A few simply have wings: The Angel of X-Men, and Hawkman, (and Hawkgirl, etc.) fly with wings.
I will get out of the way the pseudo-qualifiers:
Wonder Woman has an invisible airplane.
The Hulk "flies" by enormously strong leaps.
Iron Man has jets on his feet.
Thor "flies" by hurling his hammer, then catching the strap at the last second. Yes, it is sort of absurd.
The Atom is so small he is carried on wisps of air, or is subject to, and maneuvers around in, even subtler microscopic forces.
Dr. Strange seems to hover around lots. Usually in odd dimensions, but he can keep his feet off the ground. Using magic.
I am completely out of the loop on the more modern comix heroes. Sorry.
edit March 2016
I realize I quit reading comics in 1968, and have become more aware lately of my laughable incomplete survey.