| Formia to Collegno | 402.40 mi (647.60 km) |
| Formia to Cologno al Serio | 357.08 mi (574.67 km) |
| Formia to Cologno Monzese | 366.14 mi (589.25 km) |
| Formia to Colorno | 301.25 mi (484.82 km) |
| Formia to Comacchio | 248.02 mi (399.16 km) |
| Formia to Comiso | 302.87 mi (487.43 km) |
| Formia to Como | 387.21 mi (623.16 km) |
| Formia to Concordia Sagittaria | 313.28 mi (504.17 km) |
| Formia to Concorezzo | 367.78 mi (591.89 km) |
| Formia to Conegliano | 325.96 mi (524.59 km) |
| Formia to Conselice | 242.00 mi (389.47 km) |
| Formia to Conselve | 287.85 mi (463.25 km) |
| Formia to Conversano | 183.35 mi (295.07 km) |
| Formia to Copertino | 242.03 mi (389.51 km) |
| Formia to Copparo | 266.66 mi (429.15 km) |
