Kythnos is just 25 miles from Athens and so it is ideal even for one-day getaways! During the summer months, ferries from the ports of Lavrion and Piraeus take place daily. The ferry connections from Athens to Kythnos are as follows:
Lavrion – Kythnos: The port of Lavrion is the nearest port of Athens to Kythnos. The itinerary is operated many times weekly and the journey lasts from 1 hour 40 minutes to 2.5 hours.
Piraeus – Kythnos: The ferry connection is served several times a week and the duration of the trip is 3 hours.