| Welwyn Garden City to Cognac | 422.23 mi (679.52 km) |
| Welwyn Garden City to Cogolin | 668.40 mi (1,075.69 km) |
| Welwyn Garden City to Colmar | 422.59 mi (680.09 km) |
| Welwyn Garden City to Colombes | 226.43 mi (364.40 km) |
| Welwyn Garden City to Colomiers | 570.45 mi (918.05 km) |
| Welwyn Garden City to Combs-la-Ville | 248.47 mi (399.87 km) |
| Welwyn Garden City to Comines | 156.03 mi (251.10 km) |
| Welwyn Garden City to Compiegne | 211.60 mi (340.53 km) |
| Welwyn Garden City to Concarneau | 318.22 mi (512.13 km) |
| Welwyn Garden City to Conde-sur-l'Escaut | 188.94 mi (304.07 km) |
| Welwyn Garden City to Conflans-Sainte-Honorine | 218.60 mi (351.81 km) |
| Welwyn Garden City to Corbas | 483.21 mi (777.65 km) |
| Welwyn Garden City to Corbeil-Essonnes | 250.24 mi (402.73 km) |
| Welwyn Garden City to Cormeilles-en-Parisis | 222.28 mi (357.73 km) |
| Welwyn Garden City to Cosne sur Loire | 334.20 mi (537.84 km) |
