There are two airports in case you would prefer to fly to visit the conference:
Bratislava Airport (BTS)
The main airport of the Slovak Republic is the most comfortable choice. With flights from and to countries all over Europe it can be a good choice for visitors of Bratislava. The airport is located in the eastern part of the capital city of Bratislava
For further information about public transport, taxis or other practical information, please visit the official site of Bratislava Airport.
Vienna-Schwechat Airport (VIE)
The Vienna-Schwechat Airport is located only 40 kilometres west of Bratislava. Buses to Bratislava depart from the Vienna-Schwechat Airport every 30 to 60 minutes. You can purchase your tickets and choose a particular bus line at https://flixbus.com (bus stop No 4) or http://www.eurolines.sk (bus stop No 4) or http://www.regiojet.sk (bus stop No 6). Usually, the final destination of the buses is the bus station Mlynské Nivy.
For moving around the capital, you have a variation of possible transportations to choose from. From public transport, which consists of trolleys, buses and trams, through taxi services, up to hiring a car or choosing to walk on foot. You can find useful information here.