Got my itenary sorted but have a question on ferries

Have my first ferry ticket for Piraeus --Ios so my question

How many days before leaving Ios and the other islands should I book onward ticket in mid May

Example arrive Ios 12th May and need to get ferry to Santorini 16th May

Any advise appreciated

Any time after your arrival on Ios, no rush. Apart from a few key holiday dates I have never booked a ferry in advance, just turned up & bought a ticket about an hour or so before the ferry departs I can understand you wanting to be reassured you have the booking, so up 24 hours before would make you feel more comfortable rather than doing it my way Just locate the nearest place to buy them & do it at your convenience.

Thanks and there is a agent at Far Out camping on Mylopotas

Hello Coolmover,
you can always check online and buy at your convenience. yiassas1 is right, apart from a few key holiday dates you wan't have a problem booking just before the ferry departs.

Great and thanks ---very pleasing advise

Only have 3 to buy
Ios --Santorini

Santorini--Naxos

Naxos back to Piraeus