From Fira bus terminal to Oia, there are many buses to all scenic spots at the bus terminal every day. About every 20-30 minutes, there will be a bus from Fira to Oia. To get off Oia, you have to cross the crowded commercial street and walk for a while to get to the best place to watch the sunset at the top. The sunset time is very short and you have to go early. Fortunately, Oia town is in the whole process. It's also beautiful at sunset.