The very centre of Krakow is walkable but if you need to move around the city, Krakow has a good network of trams and buses.
A single adult 20-minute ticket is 4 zł/PLN (ca. 0,9 Euro).
A single adult 60-minute ticket is 6 zł/PLN.
A single adult 90-minute ticket is 8 zł/PLN.
Tickets are available in ticket machines located at most tram/bus stops and on most trams/buses; credit cards are accepted (but not in all trams).
You can also use an app to buy your ticket, e.g. Skycash, mPay or other.
You may want to take a tram to travel between the two conference venues, see CONFERENCE VENUES at the conference website for more information.