What is the best trains to take from Zurich to Venice to Florence to Rome?

Question

We are going from Zurich to Venice to Florence to Rome. We want to take the least expensive and fastest train, but we want to travel 1st class. I am having difficulty on the Internet because I do not know which train service would be the best, and many of the times/prices are not yet available.

Answer 1

Check out the www.sbb.ch site