Information about the port of Santorini
Boats from/to Piraeus, Paros, Naxos and Ios run every day. There are boats to Kythnos, Tinos, Folegandros, daily. There are connections to Heraklion, Anafi, Skiathos, Sikinos, Mykonos, Thessaloniki, Syros, Serifos and Kimolos.
Information about the port of Rhodes
Various ferries of all sizes depart daily to connect Rhodes with the rest of the Dodecanese islands, Crete, Cyclades and of course Piraeus.