German International Air Lines, also known as Lufthansa, is a major German airline based in Cologne, Germany. It is one of the largest airlines in Europe and a founding member of the Star Alliance, the world's largest airline alliance. Lufthansa operates a large fleet of aircraft, serving both domestic and international destinations. The airline offers a range of services and classes, including Economy, Premium Economy, Business, and First Class. Lufthansa is known for its extensive route network, quality service, and modern fleet.