Kamari beach is about 15 minutes bus ride from Fira and 30 minutes from Oia, give or take. It’s very easy to get there by bus, but no taxis are ever around. So you kind of have to take the bus, but that’s no problem. They run frequently and are big buses. Kamari beach is only a few minutes walk and there’s a mini mart downstairs from the Airbnb. I recommend staying here. It’s worth the money. If I weren’t staying in Fira, I’d stay here again.