| Welwyn Garden City to Carpentras | 587.55 mi (945.56 km) |
| Welwyn Garden City to Carquefou | 316.95 mi (510.08 km) |
| Welwyn Garden City to Carqueiranne | 668.73 mi (1,076.22 km) |
| Welwyn Garden City to Carrieres-sous-Poissy | 220.60 mi (355.02 km) |
| Welwyn Garden City to Carrieres-sur-Seine | 227.99 mi (366.91 km) |
| Welwyn Garden City to Carros | 651.69 mi (1,048.79 km) |
| Welwyn Garden City to Carvin | 163.95 mi (263.85 km) |
| Welwyn Garden City to Castanet-Tolosan | 578.16 mi (930.46 km) |
| Welwyn Garden City to Castelginest | 565.55 mi (910.17 km) |
| Welwyn Garden City to Castelnau-le-Lez | 595.43 mi (958.25 km) |
| Welwyn Garden City to Castelnaudary | 594.88 mi (957.37 km) |
| Welwyn Garden City to Castelsarrasin | 539.93 mi (868.94 km) |
| Welwyn Garden City to Castres | 578.17 mi (930.48 km) |
| Welwyn Garden City to Caudebec-les-Elbeuf | 182.45 mi (293.62 km) |
| Welwyn Garden City to Caudry | 195.15 mi (314.07 km) |
