Models that can fly are moved during the movement phase exactly like other models except they have the option of taking to the air and flying rather than just walking or running. A flying model may take off, fly as far as it is able, and land again all in the same movement phase. Models do not normally end their movement in the air, they simply use their ability to fly to move further and to pass over obstacles or troops that may be in the way. It is possible to remain airborne however, and this is explained later.
Generally speaking, models that can fly can travel up to 24" through the air during their movement phase. If a model flies more slowly or more quickly this is noted in the Battle Bestiary. The model must move wholly in the air or wholly on land, it cannot mix the two in the same turn. A model may use this move to get itself into hand-to-hand combat if the player wishes, effectively charging its opponent from the air. Note that a flying charge is still only 24". The distance is not doubled as it is for a charge over land.
Flying models are moved without penalty for changing direction or any other reason. The model is simply moved as the player wishes up to the maximum distance allowed.