Theoretically he should be able to do this. The problem might be landing since he’s not invulnerable or super strong. But then again, we’re talking comic book logic. The speeds at which he travels should have already ripped him apart if he doesn’t have some sort of protection.

I’m not a Flash expert by any means. Does the Speed Force protect him? I know in the Young Justice cartoon Wally wore pads with his costume because he didn’t have as good control as Barry, so I’m guessing it doesn’t fully protect him.