If you plan to come by air, the Karol Wojtyla airport is the Bari airport, very well connected with the two main International Italian airports (Rome and Milan). It hosts many international flights, too, including those operated by low cost companies.
For people travelling by train, Bari is well connected by train with many Italian and foreign cities, including by Eurostar fast trains. The main railway station is in the heart of the city. From there, the Congress venue is reachable by a local train.
Bari is very well connected with good and fast toll highways with the most important cities, e.g. Naples (around 250 km), Rome (around 450 km) or Milan (around 800km).
Transportation from/to the airport to/from the venue will be arranged according to the scheduled arrivals. The venue is around 30 km far from the airport, and the trip takes around 30 minutes.
Car rental is also possible at the airport.
Bari city centre (a very nice place) can be easily reached by bus or by train.