Board Thread:Site Discussions/@comment-27368475-20151218170323/@comment-679780-20160528201732

But it takes roughly 1-3 minutes for Sonic to complete the average act of a Zone, pressuming canon Sonic speedruns.

The Flash could perhaps zip through zones in a second. He can make laps around the whole world in a few seconds. Sonic Unleashed shows Sonic is capable of world travel in a few seconds give or take flying by plane.