| Portsmouth to Cognac | 354.78 mi (570.96 km) |
| Portsmouth to Cogolin | 632.55 mi (1,017.99 km) |
| Portsmouth to Colmar | 423.08 mi (680.88 km) |
| Portsmouth to Colombes | 197.53 mi (317.89 km) |
| Portsmouth to Colomiers | 509.69 mi (820.27 km) |
| Portsmouth to Combs-la-Ville | 219.73 mi (353.62 km) |
| Portsmouth to Comines | 178.89 mi (287.90 km) |
| Portsmouth to Compiegne | 198.10 mi (318.81 km) |
| Portsmouth to Concarneau | 239.22 mi (384.99 km) |
| Portsmouth to Conde-sur-l'Escaut | 206.47 mi (332.28 km) |
| Portsmouth to Conflans-Sainte-Honorine | 188.85 mi (303.93 km) |
| Portsmouth to Corbas | 449.10 mi (722.76 km) |
| Portsmouth to Corbeil-Essonnes | 219.88 mi (353.86 km) |
| Portsmouth to Cormeilles-en-Parisis | 193.49 mi (311.39 km) |
| Portsmouth to Cosne sur Loire | 296.51 mi (477.18 km) |
