Instead of using the cosmic treadmill as his uncle Barry, Wally can use his speed to travel through time. In Flash #150, he traveled back to the events of "Crisis on Infinite Earths" and battled the Anti-Monitor, speed-blitzing him to death. He also outran death to the edge of the universe and beyond, where death didn't even exist and continued to run to get Linda back. There was a comic titled The Human Race in which Wally ran faster than instant teleportation, Reaching Trans-Time Velocity. Flash vol 2 #177 had Wally outrun the gravitational pull of a black hole. Using Jessie Quick's speed formula combined with his speed steal, Wally can temporally accelerate to the point where he escapes linear time, essentially allowing him to function like the chronokenetic Zoom.