Flyers suffer no movement penalties for changing direction, overflying scenery, or crossing obstacles. They may overfly other models, including enemy troops, without penalty. Flyers may not move, land in or take off from within a wood. If flyers wish to enter a wood, they must land outside it and walk inside using their ground movement in the next turn. Note that this applies to any terrain that both players consider would prohibit flying.
Flyers may not land on top of enemy formations - if they wish to attack an enemy they must engage in combat as described above.