From Rijeka to Zadar there is several scheduled bus connection, some drive all year around some only during the summer season, to see timetable for a specific day, please fill in the date field about and press search. If you are planning to travel also in the opposite direction, you should consider buying a return ticket with the same bus company as this is cheaper then two single tickets. If you are travelling from the Rijeka airport, you will have to take the airport bus to the main bus station to catch the bus to Zadar.