Crete is approximately 260 km long and 60 km wide.
Chania airport is much smaller and far less busy than Heraklion airport. The distance from Heraklion to Rethymno is 80 km and from Chania to Rethymno 45 km Crete flight schedules.
Ferry services from Athens (Piraeus port) to Rethymno Crete island
Visit www.Ferries.gr and search through all ferry schedules to/from Rethymno and the rest of the Crete island.
As in all of Crete, this area is very safe and you will be unlikely to feel or be in danger.