GETTING THERE
Getting to the Catacombs on the Appian Way
St Callixtus sits outside the centre — the buses that reach it, the tour-with-transport option, and the road itself.
See catacombs tours on GetYourGuide ↗Why it's out of the centre
One thing that surprises first-time visitors is that the catacombs aren't in central Rome at all — they're out on the Appian Way, beyond the old city walls. That's not an accident of modern geography but the whole reason they exist: Roman law required burials outside the walls, so the cemeteries line the ancient roads out of the city. Reaching St Callixtus therefore means a short trip out of the centre, which is worth planning for rather than being caught out by.
By bus
If you're travelling independently, two buses reach it. Bus 118, from the Colosseo or Circo Massimo, stops right at the 'Catacombe di San Callisto' gate. Bus 218, from San Giovanni, stops at Fosse Ardeatine, opposite the entrance. Either is a straightforward ride, though you'll then walk up the tree-lined drive to the site itself. Check current timetables, as service can be sparse, and remember the site's midday closing and Wednesday closure when timing your trip.
By tour with transport
The alternative, and the reason much of a tour's price exists, is to book a guided tour that includes round-trip transport from central Rome. This removes the navigation entirely, delivers you to the gate, and often folds in a walk on the Appian Way or a second catacomb. For visitors short on time, unsure of the buses, or wanting the guiding in a particular language, it's the simplest way to do the whole thing as a smooth half-day.
The Appian Way itself
However you get there, don't rush straight in and out — the Appian Way is a destination in its own right. The 'queen of roads,' Rome's great southern consular route, it's lined with ancient tombs and monuments and, in stretches, still paved with its original basalt stones. Many tours pair the catacombs with a walk along it, and even independently it's worth lingering: the road is the context that makes sense of the cemeteries dug beneath it.