Ok, if anyone is wondering how fast Superman is: In Infinite Crisis, Superman flew from Earth to the Andromeda Galaxy about 1 hour.
2.5 million light years--> Light moves at 3*10^8 m/s --> In 7.8894*10^13 s (2.5 million years times 31,557,600 s/year) --> Distance of 2.36682*10^22 m--> 1 hour = 3,600 s --> Superman's speed = 6.5745*10^18 m/s = 2.1915*10^10 times the speed of light.