Kimolos is the small, slow-paced island just off the north-east tip of Milos, and Sifnos is its better-known neighbour to the north, famous for pottery, walking paths and some of the best food in the Cyclades. The two are linked by a short crossing that many travellers use to string together a western Cyclades trip without doubling back through Piraeus.
The route is served by a mix of boats. Year-round conventional ferries from Blue Star Ferries and Fast Ferries call on a few days each week, Aegean Sea Lines adds sailings in the cooler months, and in summer Seajets and Magic Sea Ferries put on quicker, pricier boats. That mix is why the fares on this page range from a few euros to well over thirty.
Because Kimolos has only a handful of departures on most days, the timetable should shape your plan rather than the other way round. Pick your Sifnos arrival day first, then check which boat runs that day. In high summer you usually have a choice; in winter the conventional ferries may be the only option, and not every day has one.
On Sifnos you land at Kamares, the island's main harbour, with the capital Apollonia a short drive inland. From there, onward boats run to Serifos, Milos, Paros and back to Piraeus, so Sifnos makes a good pivot point for the rest of your island hopping. Our older page listed this crossing at about 2 hours; Ferryhopper's current figures are much shorter, and we now follow them.