Originally Posted by
unusualtravelblog
This depends of course how much you value your time. Cyclades are not too far from Piraeus by boat, especially if you take a Catamaran. Some people enjoy a ferry ride, especially if it is not high season, thus not crowded, I can enjoy sitting on a ferry if it is not too long. But, if you have to go to islands such as Rhodos, Crete, why bother taking the boat, except if you are planning to island hop? Then most people will indeed pay for a flight I assume.
I still feel sick when I think of a boat trip I took as a kid with my father from Athens to Rhodos. The boat took 24 hours to arrive in Rhodos. Built in 1974, I still remember the name of this "horror" boat: Rodanthi.
Santorini is 8+ hours by Blue Star or 4+ by catamaran. That is still much slower than the plane.