| Formia to Campos del Puerto | 571.86 mi (920.33 km) |
| Formia to Canals | 766.20 mi (1,233.09 km) |
| Formia to Candelaria | 1,907.30 mi (3,069.50 km) |
| Formia to Canet de Mar | 571.66 mi (919.99 km) |
| Formia to Cangas | 1,153.04 mi (1,855.64 km) |
| Formia to Cangas de Narcea | 1,037.15 mi (1,669.13 km) |
| Formia to Canovellas | 587.18 mi (944.97 km) |
| Formia to Canteras | 820.83 mi (1,320.99 km) |
| Formia to Cantillana | 1,065.08 mi (1,714.08 km) |
| Formia to Capdepera | 545.65 mi (878.14 km) |
| Formia to Carballo | 1,145.15 mi (1,842.94 km) |
| Formia to Carcagente | 756.09 mi (1,216.81 km) |
| Formia to Cardedeu | 583.11 mi (938.43 km) |
| Formia to Carlet | 757.89 mi (1,219.71 km) |
| Formia to Carmona | 1,058.80 mi (1,703.98 km) |
