From our friends at Tuscany Tourism www.turismo.intoscana.it

Pisa and Florence are getting closer: now you can travel from Pisa to Florence and back in only 49 minutes by train for the same price as always: Euro 5,80 (second class) or Euro 8,70 (first class). How is that possible if a normal trip normally lasts 1:30 hour?

There’s no high speed train, no Freccia Rossa, Freccia Argento or a new line. It’s more simple than that: if a normal Regional stops in several small stations, Regional Veloce don’t.
Timetable

Trains…

Departing from Florence: 7.00 am; 11:00am. 1.00pm; 3.00pm; 5.00pm; 7.00pm

Departing from Pisa: 9.11am; 11.11am; 1.11pm; 3.11pm; 5.11pm; 7.11pm