We will stay 3 days in Santorini and plan to go back to Athens on the 01/09. I would like to know if we need to book the ferries tickets before or we can buy its on the day of depart. We plan to take the morning ferry to Athens. There are some ferries on web but I'm quite confusing. I would hope your advices about a good booking website if we should book the tickets in prior.
Thanks for your help