From Cytherea to Malta

Visual designer and writer Michael DeLuca from Massachusetts blogs here. The story he is working on takes place on a desert isle in the Mediterranean with features as follows:

..Alonso's ship was bound from Tunis to Naples, en route from a failed attempt to marry off Ferdinand. So likely the isle is located either in the Tyrrhenian Sea or in the Strait of Sicily...which would be a hell of a long way for Polyphemus to float, since his island is somewhere west of Cytherea, in the Ionian Isles on the west coast of Greece. But we've got Poseidon intervening here, as well as Setebos. If it took Odysseus 10 years to get from Troy to Ithaca, it can take Polyphemus three days to get from Cytherea to Malta.