XL Airways Germany was a charter airline, operating charter and ad-hoc lease services, mostly out of Frankfurt Airport.
The airline was founded as Star XL German Airlines in 2006. In October of the same year, the Avion leisure business was bought out and re-organized as XL Leisure Group, resulting in the airline changing its name to XL Airways Germany. In 2008 XL Leisure Group filed for administration due to rising fuel prices. Operations of the German and French airline subsidiaries were not affected, however. The company filed for bankruptcy in December 2012.
Source: Wikipedia