Fly Speed
Source Player Core pg. 412
As long as you have a fly Speed, you can use the Fly and Arrest a Fall actions. You can also attempt to Maneuver in Flight if you're trained in the Acrobatics skill.
Wind conditions can affect how you use the Fly action. In general, moving against the wind uses the same rules as moving through difficult terrain (or greater difficult terrain, if you're also flying upward), and moving with the wind allows you to move 10 feet for every 5 feet of movement you spend (not cumulative with moving straight downward). For more information on spending movement, see Tactical Movement.
Upward and downward movement are both relative to the gravity in your area; if you're in zero gravity, moving up or down is no different from moving horizontally.
Wind conditions can affect how you use the Fly action. In general, moving against the wind uses the same rules as moving through difficult terrain (or greater difficult terrain, if you're also flying upward), and moving with the wind allows you to move 10 feet for every 5 feet of movement you spend (not cumulative with moving straight downward). For more information on spending movement, see Tactical Movement.
Upward and downward movement are both relative to the gravity in your area; if you're in zero gravity, moving up or down is no different from moving horizontally.