The most useful bus for visitors is 409, which connects the airport to the heart of Varna, stopping near the Tourist Information Centre, before heading onward to the resort at Golden Sands (Zlatni Pyasâtsi). This bus also passes the central bus station in Varna and stops outside Sveti Konstantin. It runs about every 15 minutes between 6am and 11pm. Bus 109 runs between the train station and Golden Sands. Buy tickets from the driver.
If you need a rental car, Hertz and Sixt have offices at the airport.