In recent years flying drones also known as Unmannered Aerial Vehicles proved to be very useful in our daily activities. Their applications range from defence industry to filmmaking, videography and health care as well as environment inspection and protection. For this to be possible they must be able to navigate safely from start to their goal positions, and this is made possible by employing path planning algorithms to generate safe trajectories of the journey. This thesis focuses on evaluating the difference between existing classical path planning algorithms and their strength and weakness depending on their application situation. This thesis also implements the conversion of generated paths into executable trajectories for a UAV navigation.