Quickest 1h 28min
There are 2 ferry companies operating from Ios to Heraklion, 3 flights from Ios to Heraklion. The cheapest ferry costs $58 and is 3h 45min.
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There are 2 ways to travel from Ios to Heraklion. 4 ferries and 3 flights are possible between the two areas. The ferry operated by Hellenic Seaways running from Paros to Heraklion is the cheapest. The ferry operated by Sea Jets running from Thira (Santorini) to Heraklion is the fastest. The ferry operated by Hellenic Seaways running from Ios to Heraklion is the most convenient.
It's important to check each mode when booking your ticket so that you can find the best method for you. The cost of each type varies differently, so be sure to use Faretrotter to keep an eye out!