Santorini to Naxos with Blue Star Ferries
Blue star ferries run what amounts to the bus service between the islands....economical, frequent , very popular, a utility service with upgrade options. For short hops or when time is not as important as money choose Blue Star over the faster services.
Santorini to Piraeus with Blue Star Ferries
We wanted to experience everything Santorini had to offer and someone suggested to take the ferry. So we booked it and choose to get a room. It is expensive to take this option and it depends on if you want privacy and to sleep on the boat. Unless you book a room you will be in airplane type seating with noise and lights and a lot of people. The food on board was limited and expensive, but was hot and tasted good. If I were to go again I would not take the ferry, I would fly back to Athens because it is shorter and cheaper.
Piraeus to Naxos with Blue Star Ferries
We had 2 and 7 years old children with us and they managed the 5 hours journey.