Pisa is reachable from 2 airports: Pisa International Airport (PSA) and Firenze Airport (FLR). The first is 5-10 minutes away by PisaMover shuttle/bus/taxi or a 35 minute walk from the conference venue. The second one is about 1h by train. Trains from Florence to Pisa are very frequent, about one every 20 minutes.
The Pisa International Airport and the Firenze Airport are hubs for many low cost airlines and they are efficiently connected to many destinations in Europe: they have regular flights to Rome, Frankfurt, Munich, Amsterdam, London, Paris, Madrid, Barcelona, Istanbul, Doha, Moscow for intercontinental connections.
Pisa is also nicely connected via train (Firenze 1h, Roma/Milano 3h).
Some suggestions to book your travel:
List of recommended hotels
Here you can find some suggested hotels. A more complete list of accomodation structures is present on the Pisa municipality website: https://www.turismo.pisa.it/en/pisa-per-te/9
Visa
Information on visa requirements for visiting Italy are here and the local organisers will give support for difficult cases.