Thank you for the suggestions, monahos, david4455.

It will be my first time to Greece. I am so excited about the stay on the island. ; ) But, I am a little bit nervous about not being able to find frequent ferry services between Athens and Santorini and to reserve in advance. Wouldn't want to miss the cruise ship ......

I looked up the price flying from Athens to Santorini. It costs about $150Euro, the cheapest. It is more expensive than I expected. Does any one know how I can buy discount plane ticket from Athens to Santorini?