| Formia to Chivasso | 395.68 mi (636.79 km) |
| Formia to Ciampino | 64.21 mi (103.33 km) |
| Formia to Cicciano | 52.02 mi (83.72 km) |
| Formia to Cingoli | 146.53 mi (235.81 km) |
| Formia to Cinisello Balsamo | 369.14 mi (594.08 km) |
| Formia to Cinisi | 215.94 mi (347.52 km) |
| Formia to Cirie | 408.27 mi (657.05 km) |
| Formia to Ciro Marina | 226.68 mi (364.81 km) |
| Formia to Cislago | 382.10 mi (614.92 km) |
| Formia to Cisterna di Latina | 46.58 mi (74.96 km) |
| Formia to Cisternino | 202.38 mi (325.71 km) |
| Formia to Citta di Castello | 167.01 mi (268.77 km) |
| Formia to Citta Sant'Angelo | 89.20 mi (143.55 km) |
| Formia to Cittadella | 316.48 mi (509.33 km) |
| Formia to Cittanova | 240.29 mi (386.71 km) |
