Ionian Seaways operates multiple daily ferries between Corfu Port, on the Greek island Corfu and the Port of Saranda. The fast (passenger-only) ferry takes around 30 minutes, while the slower car ferry takes around 1.5 hours.
The ticket office in Corfu is located opposite the domestic port terminal, on Eth. Antistaseos. Please note that the ferry to Saranda leaves from the international ferry terminal, which is a bit further down the road.