The story
The airline started in December 1980 with a route between San Diego and South Lake Tahoe, California, operating Convair 440 aircraft, which were chosen partly to meet noise restrictions standards at Lake Tahoe Airport. The flights were stopped on Jan 21 1981, and resumed later in June when the FAA certified its only remaining operating aircraft.
A planned expansion was halted with the PATCO strike in the United States. Because of the shortage of air traffic controllers in the United States, airlines were not given the authority to add new routes. The new airline was short-lived without the chance to expand. It ceased operations after less than nine months of service in 1981.
From Wikipedia’s article on Cal Sierra Airlines, shared under CC BY-SA 4.0.3