| Formia to Cervello | 604.44 mi (972.76 km) |
| Formia to Cervera | 639.24 mi (1,028.76 km) |
| Formia to Ceuti | 820.69 mi (1,320.78 km) |
| Formia to Cheste | 761.93 mi (1,226.21 km) |
| Formia to Chiclana de la Frontera | 1,112.40 mi (1,790.24 km) |
| Formia to Chipiona | 1,118.33 mi (1,799.78 km) |
| Formia to Chiva | 763.90 mi (1,229.38 km) |
| Formia to Churriana de la Vega | 965.27 mi (1,553.45 km) |
| Formia to Ciempozuelos | 904.37 mi (1,455.45 km) |
| Formia to Cieza | 824.44 mi (1,326.80 km) |
| Formia to Cisterniga | 946.37 mi (1,523.03 km) |
| Formia to Ciudad de Melilla | 986.88 mi (1,588.23 km) |
| Formia to Ciudad Real | 937.98 mi (1,509.53 km) |
| Formia to Ciudad-Rodrigo | 1,050.78 mi (1,691.07 km) |
| Formia to Cocentaina | 763.16 mi (1,228.19 km) |
