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 Serifos
Passenger routes connect Serifos to Piraeus and Lavrio while there are frequent connections to other Cycladic islands.