SFO is the closest large international airport. You could probably catch a connection to santa rosa but wither way you're driving a few hours.
Sonoma county airport, rent a car or Uber
Sfo then rent a car and drive
There is a bus service also. Takes a little longer but much more affordable.
SFO/OAK them rental car. Santa rosa is closee but much pricier to fly into. Then rent a car. You're looking at 2+ hour drive from santa rosa.
Thanks! Your answer is awaiting moderation.