In the Warhammer game, flight is represented by a "long swoop' or 'glide' of up to 24". The flyer starts off on the ground, takes off, flies to where it wishes to go, and then lands.
Flyers therefore begin and end their movement on the ground. The exception to this is 'flying high', as explained later. Flyers do not benefit from the extra move distance conferred on ground moving models by charging or marching. They cannot march, and they charge at their normal speed as explained below.