I’d say fly 10 mph, might still be faster than running 100mph when going to point b.
You can fly high then glide down at a faster speed and any destination is a direct line.
10mph is pretty dang fast, especially since you can just go over buildings and obstacles. Slower than a bike in a straight line, but much faster otherwise when you don't need roads.
In most populated areas, you can get just about anywhere faster than any other mode of transportation.