The high-speed train crosses the Apennines in 37 minutes flat. Tickets start at โฌ9.90. Bologna's porticos, tortellini, and mortadella are now basically a lunch break from Florence.
Frecciarossa and Italo depart Firenze SMN for Bologna Centrale constantly. Book 2 weeks ahead for โฌ9.90.
Goes over the mountains the old way via Prato and Vernio. Beautiful scenery through chestnut forests.
Frecciarossa. 37 minutes, from โฌ9.90. No reason to take anything else.