Considering the Andronikos Hotel in Mykonos?
A VT member wrote the following comment about visiting Mykonos:
To/From Santorini by krissyM
You can travel around the island by "flying cat". From 10 April to 31 October 2009 the ferries leave Santorini daily (except for every second Wednesday) at 11:50 am and arrive in Mykonos at 14:25.
Ticket prices are 57 and 38 euro for buisness and economy class respectively for a one-way journey.