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Yes normally they should be available. And it's better to book in adavance to assure a trip but not necessary
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Hi, That's a perfect time to visit Greece. When it comes to book ferry rides It's good for researching ferry timetables, costs, and schedules. Most ferries do not sell out. But for peace of mind, book tickets 2 to 3 months in advance. For more info check this link- https://santorinidave.com/greek-ferries Hope this helps!
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Better to book in advance...yes they are available
You can google for ferries between the destinations on www.travel.google.com
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