Favignana is a very beautiful place and to get there you must go through the port. It's pretty…read morequick and easy. When I visit my family in Marsala in the summer, we just take a quick drive to Trapani and take the ferry. It maybe takes 30mins at most to get there by boat, but if you choose to ferry your car it can as well it can take longer.
If you ever come to this part of Sicily you really should come here. You will not regret it.