Getting to Croatia by Bus Contus Auto Trans Trieste to Pula From the UK: National Express has a daily bus from London to Zagreb (33hours). From Italy The main points of departure are Trieste and Venice. SAF links Venice with Pula and Trieste with Pula, Opatija (Abbazia), Rijeka (Fiume) and Dubrovnik SAITA links Trieste with Opatija and Rijeka daily. From Slovenia Daily buses from Ljubljana, Koper and Portoroz to Rovinj and Porec