Ios can be reached best from Santorini, Naxos, Mykonos, Heraklion – Crete island or directly from Piraeus. Ferry boats and Highspeed catamaran services run daily from Piraeus and the other islands. From May 2008, flights are operated to Mykonos, Santorini and Crete with daily boat connections to Ios.
If you plan on traveling to several different islands, it is wise to book all your ferries at once for a possible discount. However, always keep in mind that pickup and arrival times are subject to change at anytime.