Santa Barbara has it’s own (small) airport that services: Alaska, American, Delta, United and Southwest airlines. The most flight options will be found flying into Los Angeles Airport (LAX).
Flying into LAX has a lot more options for flight times and is located approximately 1 hour and 45 minutes south of Santa Barbara. If you are not planning on renting a car, Santa Barbara Airbus is a service that picks you up from your terminal and transports you up to Santa Barbara. (Alanna can speak from experience and loves using the Airbus for transportation!) Below is a link with all information regarding the shuttle: