To be honest, Flash would destroy superman or any Justice league member 1v1. The DC writers lowered his powers in the Justice League comics, because he is too powerful in his own comics. Way more powerful than superman ever was.
Nonsense. The only thing Flash has on Superman to do any damage is his Infinite Mass Punch, which is only capable of knocking out Superman for a brief period. Flash doesn't have the psychical strength to harm Superman.
You're kidding me right? You ever heard of speed force? Flash is a million times faster than superman, he can turn him in to a statue, than throw him into the speed force where superman is trapped for eternity. Superman is so slow he wouldn't be able to touch Flash, as the Flash can surpass the laws of physics. Wonderwoman even stated in one of her comic issues that Wally west, and Barry can punch harder than superman. Please go on Comicvine.com where we have these debates. It's been proven in that website that Superman stands no chance against flash. There's scans on that website that would refute my claim. If you continue to prolong your belief than you are just in denial, and I can't do anything about that. Seriously there are over 50 DC characters that can beat Superman. Heck, half of Flashes rouge gallery can beat Superman.