Another possibility is taking a bus. Currently, there are two companies that offer this service: Airport Bus Express by Autostradale and Sky Bus Lines Caronna.
Both companies stop in Florence's Piazzale Montelungo (a few hundred metres away from Santa Maria Novella train station) and the journey takes around 1 hour, traffic permitting.
Here are some useful links:
Just so you know, Sky Bus Lines Caronna will also take you from the airport of Pisa to the airport of Florence via Montecatini, Pistoia and Prato.
There's also the possibility of getting a taxi: from Pisa Airport to the center of Florence you will spend approximately €170,00 (there are no standard fares in this case, drivers are obliged by law to switch the meter on at the start of every trip). For further information contact the Taxi service by at (+ 39 050 541600) or visit the Cotapi website.
If you are planning to rent a car check out the complete list of the Car Rental companies you can find at Pisa Airport. Usually the rent-a-car offices are open from 8:00 am to 9:30 pm in the autumn and winter months (october-march) and from 7:00 am to 10:30 pm during spring and summer (april-september).
The original version of this article was written by Kinzica Sorrenti.