Crossair Ltd. Co. for Regional European Air Transport was a regional airline headquartered on the grounds of EuroAirport Basel=Mulhouse-Freiburg.
Founded as a private company, it changed to Crossair in 1978, before the beginning of scheduled services in 1979. It added charter services for major shareholder Swissair in 1995. In 2002, Swissair passed out of existence as most of its assets were taken over by Crossair which then changed names to Swiss International Airlines.
Source: Wikipedia