Select a method of transportation from Athens or nearby Piraeus. Olympic Airways provides flights every day from Athens to the Santorini airport. If you choose to go by boat, ferries run from the port city of Piraeus to Santorini twice a day. Buses meet the ferries to transport you to your destination on Santorini.
Research accommodation options on the island from a reliable source like a travel agent or a reputable travel guidebook. Look into apartments and villas with efficiency kitchens. Some areas are very quiet, suitable for a honeymoon with sunset views and easy access to the beach, while other are more exciting and draw crowds.
Book your accommodations a couple of months in advance, especially if you plan to stay at the height of the season. In the summer months of July and August, the island is very crowded. Print out the confirmation for your hotel reservation if you book online.
Check out restaurants in advance, and make some restaurant reservations from home if you are honeymooning in peak season.
Take along a list of attractions you may want to visit. Even on a honeymoon, it's fun to have an adventure like climbing to the ruins of ancient Thira where you will discover the city high on a precipice surrounded by the sea.
Look into some nearby hot spots for late night entertainment. Some locations like Fira offer all night discos and nightclubs. For a quieter, more romantic nighttime experience, seek out sophisticated restaurants with scenic water views.
Rent mountain bikes to explore the island.
