Rome Reginonal Trains- Getting around Rome for a one day visit

1, Train and walk
2. Sure. And you can buy an all day pass for the train and the buses.

From La Giustinlana, you can easily take the Regionale train to Rome Termini. It's a 36-minute train ride. Roma S. Pieto station is one of the stops coming in. The Pantheon is about 3.2km from the Rome Termini train station. Reportedly, its a 12Euro taxi ride between the two locations.

The Pantheon, Trevi and Spanish Steps are all very close to each other. St. Peter's is further away in one direction and the Colosseum in the opposite direction, so regional trains and/or metros to San Pietro and then a 20 or so minute walk up through Piazza Navona toward the Pantheon and Spanish Steps and Trevi is very doable. You can then get the metro from the Spanish Steps area or from near Piazza Barberini to the Colosseum. We've also walked that bit, but it can lend itself to a longer day.

The FM3 train from a La Giustiniana will run you into Roma San Pietro, Roma Trastevere, or Roma Ostiense - but it heads off to Roma Tiburtina and will not take you to Roma Termini. You could catch the metro, or another Regionale train from Ostiense if you want to get to Roma Termini using the train system. We used to live on the Cassia for about a year and to get downtown, we used the buses rather than the Regionale trains. We found the trains to be inconsistent and you could wait forever on a Sunday (even though parts of the day it's supposed to be every 30 minutes). The primary bus to downtown from the Cassia is the 201 bus. (You'll see the 223 out there but it's not "eventually" headed the way you want). To get to into town, you could ride the 201 bus until the route ends, at Piazza Mancini. Then walk out of the bus, turning left and following the crowd to the tram tracks. Here catch the #2 tram (your ticket is still good!). Ride this tram until it dead-ends. Get off and you'll see the city walls and the gates to enter Piazza di Popolo directly in front of you. From here, you can walk through the city walls and into the downtown area, catch the small electric buses (117 & 119) to the Colosseo and other sites - or get on the A-line metro at the adjacent Flaminio stop. To return, simply reverse directions... back to the Flaminio area by metro or bus. Jump on the #2 tram back to Piazza Mancini – and then back on the 201 bus, which starts its route here. At Mancini, a major bus hub, you can catch buses to the Vatican, Castel Sant'Angelo or Trastevere area (280 bus for example), or you could head to Roma Termini (910 bus)... or into town (#2 tram). There are many more buses, and many more options from Mancini!

Both train or bus are viable options from the Cassia Area. By train, if you're headed to Trastevere, then you'll probably have to ride the #8 tram in from the Trastevere train station. (the #3 bus has an interesting route from there!). At Roma Ostiense, there are unlimited options as it is the 3rd largest train station in Rome. The metro line B is there at Piramide - you have the LIDO train run to Ostia Antica, and many, many bus routes... including the 280 bus back to Mancini! At Roma San Pietro you're more limited as only the infamous 64 bus runs here. You'll have to walk to the St. Peter's or wait for a taxi. There is a taxi stand but rarely will you see a taxi there... you can call, or wait for someone headed to the station... take your chances on the 64 bus, or just walk it! The Regionale trains end about 23:15 at La Giustiniana so do check the schedules if you're having a late night. The 201 runs until midnight and then the Night Buses take over on the Cassia... A taxi ride to your section of the Cassia from downtown will be 25-35 euro depending on where you're starting from in the city.