This week I flew in the smallest commercial plane so far: the Embraer 120 is a turbo propeller plane and seats about 25-30 people. It was operated by United Airlines. It is noisy but very stable, unlike the smallest Cesna I flew while in Argentina.
I flew from San Jose to Santa Barbara. The airport of Santa Barbara at Goleta is the cutest airport I've seen. It is a colonial style building. Looking from the outside, you would never know this is airport. You actually get the feeling you landed somewhere in Mexico.