Lufthansa AG, also known as Lufthansa, is the national airline of Germany. It is the largest airline in Europe in terms of passenger capacity and fleet size, and the fourth largest airline in the world in terms of passenger capacity. Lufthansa is the largest airline in Germany and the national airline of Germany. The parent company of Lufthansa AG is Lufthansa Group (Lufthansa). Swiss International Air Lines is also part of the Lufthansa Group.