| Watford to Carpentras | 582.18 mi (936.93 km) |
| Watford to Carquefou | 305.11 mi (491.02 km) |
| Watford to Carqueiranne | 663.78 mi (1,068.24 km) |
| Watford to Carrieres-sous-Poissy | 215.68 mi (347.10 km) |
| Watford to Carrieres-sur-Seine | 223.57 mi (359.80 km) |
| Watford to Carros | 648.13 mi (1,043.07 km) |
| Watford to Carvin | 166.24 mi (267.54 km) |
| Watford to Castanet-Tolosan | 569.21 mi (916.05 km) |
| Watford to Castelginest | 556.57 mi (895.71 km) |
| Watford to Castelnau-le-Lez | 588.74 mi (947.49 km) |
| Watford to Castelnaudary | 586.29 mi (943.55 km) |
| Watford to Castelsarrasin | 530.71 mi (854.09 km) |
| Watford to Castres | 569.92 mi (917.19 km) |
| Watford to Caudebec-les-Elbeuf | 175.47 mi (282.39 km) |
| Watford to Caudry | 196.72 mi (316.59 km) |
