United Airlines offers roundtrip flights to California from select cities in the U.S. with prices starting at $142, as provided by ShermansTravel. (Click on "United.com" in the main paragraph to see this sale; all taxes are included.) That's the lowest current rate we could find for select routes by $11. This price is valid on flights departing from Los Angeles, CA, (LAX) to San Francisco, CA, (SFO) on June 24; prices vary depending on the departure cities and dates chosen. Book this travel deal by June 10 for travel through July 31. Other notable routes: