It could sound "strange", but Andros is the only Aegean island not connected to the port of Piraeus, the biggest port of Greece!
The reason: the port of Rafina is much more closer to Andros (name of the port: Gavrio), than the Piraeus one!
For information on Andros: www.andros.gr
Enjoy your holidays!
There are 3 or 4 daily boats from Rafina port in Attika in the summer. Unfortunatelly not so many off season. The boat reaches Andros after 2 hours arriving at Gavrio port. Usually the boat serves Mykonos and Tinos too so in high season you find it already full on your way back to Athens.
You can rent a car to explore the island although there are some local buses that connect Gavrio port with Mpatsi, Hora, Korthi etc
You can visit some other islands of Cyclades from here. Tinos island is just 2 miles away so you can go there for a daytrip.
The good thing is the local boat services, everyday in summer and less frequently in the rest of the year. Leaving Rafina port (east Athens) between 17:00 and 19:15, it is the best way to avoid crowded conditions, which is not the case in daytime services that also serve Tinos and Mykonos islands.
We all wish there were local services also in the morning, e.g. a boat leaving Andros around 6:30 or 7:00 and then from Rafina at 9:30 or 10:00. Would be good for everyone: Weekend commuters wishing to stay one more night at their vacation home, or travellers who hate waking up at 5:30 to get a boat to the islands.
Then we can dream on, about a service less susceptible to the winds, perhaps even a bit quicker. But I don't think a Bridge is to be built anytime soon...
Donkeys are really not so fast, but they can transfer a lot of things, they are always useful. What's more, you can go everywhere with them (if you don't have a 4X4 -I am a fan of them!- or a motorcycle), as Andros has still many "wild" roads...
By such big ships -the departure is at the port of Rafina, 35 km NE of Athens- you arrive in Andros in less than 2 hours (one hour by a fast "flying dolphin").
The arrival is in Gavrio, a village with nothing special, but it is a good starting point to discover the wild northern Andros. Gavrio was an ancient port, near it you can admire the circular (20 m tall!) tower of Agios Petros.