BY FERRY
You can approach Alonissos through a ferry or a high-speed ferry from Agios Konstantinos and Volos. There are every day routes from and to the island.
For more information call the agencies:
Athens 210 4187000, 3843220
Agios Konstantinos 22350 31614, 31989
Volos 24210 39787, 21051, 23400
Alonissos 24240 66000, 65198, 65320

Alonissos has no airport. It is serviced by that of Skiathos. You can reach Skiathos by plane and then take a ferry to Alonissos.
For more information:
AIRPORT OF SKIATHOS 24270 22376, 21885
AIRPORT ELEFTHERIOS VENIZELOS 210 3530000