Upvote:3
Cheapest there are the buses by Terravision and a couple of other bus companies. If you book in advance you can get a one-way for as cheap as 5,80β¬. It takes 55 minutes. Note that here you are not flexible with your departure time. Buying tickets at the booth is possible but at higher prices and may sell out, especially in summer. In the latter case, don't expect any service, just take the train:
The most convenient train is the Leonardo Express train which takes you direct to Roma Termini station, departing every 15 minutes (30 minutes sometimes) and taking 32 minutes. The cost is 14β¬ and a commission may be charged if you buy it at the booth. You have to convalidate it before entering the platform. This train is supposed to run even in case of railway strikes.
There is also cheaper regional trains to Roma Tiburtina station for 8β¬, every 30 minutes and taking 48 minutes. Both Termini and Tiburtina are connected to the metro network of Rome. You have to convalidate your ticket.
Upvote:5
According to Wikivoyage, the cheapest transport option is to use Terravision buses. The price is 5,80EUR
one-way or 9EUR
return. The trip takes 55 minutes.
There are also options available by public bus, but they cost the same if you need to get to the center of Rome.