There are frequent boats between Piraeus and Hydra. You can opt for either a slow car ferry around 3 hours or a fast catamaran 1.5 hours. As of 2007, the cheapest fast option is Euroseas (http://www.euroseas.gr/), which has one daily departure at 9:30 AM return at 6 PM and sells return tickets for €34. Hellenic Seaways has more frequent sailings up to half a dozen daily, but also charges more at around €42. Due to the popularity of Hydra, it's possible for some of the Hellenic Seaways boats, which are small, to sell out during peak periods, especially the ones at the most convenient hours. Tickets for all boats may be bought from agencies at the harbor.
