HOW TO REACH SANTORINI
Santorini can be reached from most international airports via Athens with Aegean airways and Ryanair. The flying time from ATHENS INTERNATIONAL AIRPORT to Santorini is approximately 40 minutes.Nearly all international scheduled flights arriving in Athens allow adequate time for making the connecting flight to Santorini.
CHARTER FLIGHTS: From May till October many charter airlines fly directly to Santorini airport from many European cities. During the same period Santorini is also connected with flights to and from Thessaloniki and Herakleion.
By ferry boat
Another way to reach the island is by a regular ferry boat service from the port of Piraeus and almost all the Cycladic islands (during summer). The boat trip takes approximately 5 – 9 hours depending on the ferry and the ports of call.
Daily high speed boats are also available only during the summer period leaving from the port of Piraeus (the trip lasts about 4 – 5 hours) and from numerous other Cycladic islands and Crete.
More on how to reach Santorini: http://www.visit-santorini.com/site/how_to_go.htm