No Silverfish do not fly.
Silverfish can jump up to 2 feet vertically but they cannot fly.
Also Silverfish love vegetable matter and will eat paper, glue, cardboard, toothpaste, silk, cotton, pasta, mold, cereals etc.
Silverfish and Earwigs are in the same class of insecta and some types of earwigs can fly because some earwigs have wings.
But silverfish are different and do not have the wings that allow them to fly but they can an do jump up to 2 feet vertically.
Also Silverfish are immune to most bug poisons so it can be hard to kill the bugs with the bug poisons and are to get rid of the Silverfish.