A few times a week there is a bus from Lausanne to Vukovar, the bus first travels to Zurich, where passenger from various cities in Switzerland are collected on one bus which then continues towards Zagreb. In the table below you can see departure time, operational days and ticket prices. If the travel days should not match your itinerary you have option to first take bus or train to Zurich and then catch the more frequent bus to Zagreb from there one, departure times you can see here. The bus travel time from Lausanne to Vukovar is about 23 hours.