Hellenic Seaways operate their hydrofoils (Flying Dolphins) and Catamarans (Cats - bigger than dolphins) out of Piraeus and have a regular timetable throughout the year. You'll find their ticket offices around the port. Don't forget to ask the ticket office to point out where you dolphin will leave from. YOU CAN BOOK ONLINE and take your reservation number (it will be emailed to you) to the ticket office to collect your ticket on the day of travel - make sure you leave yourself enough time in high season in case there's a queue.
Click for online booking Hellenic Seaways
Select tickets to collect from Agent (this is the kiosk on the port)
Print the email confirmation so you have the reference number with your travel documents
Enter port at Gate E8
Collect the actual tickets at least 15 minutes (30 mins in high season) before sailing. (The barcode on the email confirmation only works if the girl collecting the tickets has the machine with her - often this is not the case so it is always less stressful to obtain the actual tickets before you try to board.)
BEWARE booking via online agents (other than the official Hellenic site) because you will pay a lot more in commission, the actual price from Hellenic is €28 per ticket but in 2018 prices as high as €43 have been reported!)
To avoid disappointment ALWAYS book your ticket in advance, even in low season (ideally 2.5 hours after your landing time, although I have managed to come through with just hand luggage and manage a taxi dash in 45 mins when the traffic is light). If you are delayed you can phone Hellenic Seaways up to 1 hour before your planned sailing time to change your tickets for a later one if you think you're not going to get there in time.
Ring +30 210 419 9000 in case of delays.
The port of Piraeus is large and sprawling. If you take a taxi from the airport, ask for Piraeus and make sure the driver knows you're heading for Hydra and then you'll get put down at gate E8 of the port.
The bus terminal (as of 2013) is NOT right outside the port gates so you need to speak to the driver and make sure he understands that you want to be put down for the flying dolphin to Hydra at Piraeus. The closest bus stop is between the two kiosks in from the the Piraeus Dymos bullding opposite Gate E8 (as shown in the photo). You will need to cross the main road which is very busy so please use the crossings at the lights.
Hellenic Seaways are one of the main carriers between the Greek islands and the mainland. They have a huge number of routes. Hydra is on the route that also includes Poros, Spetses, Porto Heli and Ermioni. What is included on the route depends on the time of day that the flying dolphin or cat leaves however Hydra is such a popular destination that it is included on most trips anyway.
Price range: Return trip from Piraeus to Hydra on flying cat approx. €54.00 (2015) per person.
Telephone: +(30) 210 419 9000 (Piraeus)
Hydreoniki Travel (Hellenic agent on Hydra) +(30 22980 54007
Visit www.hellenicseaways.com for bookings and more info.