In today's game it came up that combat start so I cast shield and flew towards combat. In the next round I wanted to cast enlarge person which is 1 round, however I was already flying. Clearly I wasn't able to spend an action to move if I was going to still cast the spell, but under the fly skill there is no mention as to the action cost of hover. Since all other movement options clearly require movement and are thus part of an action with movement.
Also, in case it matters, I was not under the effect of a fly spell, but magical insect wings which acts like part of my body.
Best Answer
No, it doesnt.
The Fly skill page says it requires no action, the check should be taken as part of another action or reaction to a situation:
You will notice that a hover check is required when you ignore the minimum movement required to remain flying, which includes not moving (or hovering):
Note that monsters have a specific feat on the bestiary to allow them to hover without making skill checks. This means that even creatures with a natural (or magical) fly speed still need to make Fly checks, even to make a full-round attack or take a 5-foot step while flying.