Firenze Airport (Peretola)
The smaller of the two airports. Closer to the city at 5km but only takes internal Italian flights and a small number of European ones. Connections to the city are only by taxi or bus- Vola in Bus, every half hour 6am-11pm.
Pisa Airport (Galileo Gallilei)
A bigger domestic and international airport located on the coast, takes all the European budget airlines. City connections are by train (approx 1hr to Florence) , taxi or bus.