Milos and Syros are both islands people fall for, but they sit in different parts of the Cyclades: Milos in the volcanic south-west, with its coloured cliffs and lunar coves, and Syros in the centre, with the grand neoclassical capital of Ermoupoli. Travellers link them when they want to combine Milos's beaches with a few days of town life on Syros, or when Syros is the jumping-off point for Tinos, Mykonos or the flight back from its airport.
The catch is that we can find no quick, frequent direct service. In our Ferryhopper timetable sample for 15 August 2026, the single sailing from Milos to Syros was the Artemis of Hellenic Seaways, which set off at 07:30 and did not arrive until 17:25. A trip of almost ten hours like this is a long island-hopping run that calls at other ports on the way, not a straight crossing. It is cheap, from €12.50, and a relaxed way to see several islands from the deck, but it takes the whole day.
Our own older route data paints a different picture, listing Blue Star Ferries and Seajets with a fastest time of about 2 hours and fares from €20. We have not been able to match that to any dated timetable, and it does not fit the sailing we sampled, so please treat it with caution and check the booking page for your date.
For many people the better plan is to change boats. Milos has ferries to Paros, Naxos and Athens (Piraeus), and all three have connections on to Syros. Depending on the day, that can get you there sooner than the direct boat and gives you more departure times to choose from.