Osijek is well-connected with regular routes running to most Croatian cities and also has daily services to Bosnia, Serbia and Germany. To see if there are services to your destination, check out the domestic and international schedule just inside the station or visit their web site that has all necessary info in English. It is also important to note that if you're buying a return ticket, you must make both the outgoing and return trip with the same operator, so make sure there's a return trip at the time you would like to head back to Osijek. The bus station can be reached by taking tram number 2 from the main square. The ticket office inside the station hall is open 05:00 - 21:00.