San Francisco (SFO) and Oakland (OAK) are serviced by all major airlines. They are each about an hour away by car from the town of Sonoma.
Santa Rosa Airport (STS) is the closest airport to the venue. It is a small regional airport served by Alaska Airlines, American Airlines, and Avelo Airlines. It is about 30 minutes by car from the the town of Sonoma.
We recommend getting a rental car, especially if you are planning an extended trip to enjoy all that the Wine Country has to offer.
If you prefer, Groome Transportation offers full-size luxury bus transportation from San Francisco and Oakland airports to the Petaluma Fairgrounds. Transit time is about 1 1/2 hours. You would need to take an Uber/Lyft from there to lodgings in Sonoma (15 miles). Their schedule is here:
The Marin Airporter offers full size luxury bus service to multiple stops in Marin County. Transit time to San Rafael and Novato is about 1 1/2 hours.. Their schedule is here: https://marinairporter.com/stops-schedules/complete-schedule/
Viansa Winery is about 15 minutes away from Sonoma Square, and 20-30 minutes from Novato and Petaluma lodgings. There is ample parking at the venue if you are driving.
If you prefer to take an Uber/Lyft please be aware that they should be easy to find on Sunday afternoon, but can be difficult to find late on a Sunday night. We strongly recommend that you pre-schedule your pickup from Viansa.