| Portici to Cognac | 809.84 mi (1,303.31 km) |
| Portici to Cogolin | 434.44 mi (699.16 km) |
| Portici to Colmar | 608.09 mi (978.63 km) |
| Portici to Colombes | 812.98 mi (1,308.37 km) |
| Portici to Colomiers | 692.05 mi (1,113.74 km) |
| Portici to Combs-la-Ville | 791.07 mi (1,273.11 km) |
| Portici to Comines | 875.39 mi (1,408.81 km) |
| Portici to Compiegne | 815.56 mi (1,312.51 km) |
| Portici to Concarneau | 1,021.91 mi (1,644.60 km) |
| Portici to Conde-sur-l'Escaut | 842.25 mi (1,355.48 km) |
| Portici to Conflans-Sainte-Honorine | 821.70 mi (1,322.39 km) |
| Portici to Corbas | 580.68 mi (934.51 km) |
| Portici to Corbeil-Essonnes | 791.43 mi (1,273.68 km) |
| Portici to Cormeilles-en-Parisis | 816.96 mi (1,314.77 km) |
| Portici to Cosne sur Loire | 725.39 mi (1,167.40 km) |
