| Watford to Cognac | 411.75 mi (662.65 km) |
| Watford to Cogolin | 663.94 mi (1,068.51 km) |
| Watford to Colmar | 424.04 mi (682.42 km) |
| Watford to Colombes | 221.95 mi (357.20 km) |
| Watford to Colomiers | 561.37 mi (903.43 km) |
| Watford to Combs-la-Ville | 244.19 mi (392.99 km) |
| Watford to Comines | 159.73 mi (257.06 km) |
| Watford to Compiegne | 209.57 mi (337.27 km) |
| Watford to Concarneau | 304.75 mi (490.45 km) |
| Watford to Conde-sur-l'Escaut | 192.10 mi (309.16 km) |
| Watford to Conflans-Sainte-Honorine | 213.92 mi (344.27 km) |
| Watford to Corbas | 478.83 mi (770.60 km) |
| Watford to Corbeil-Essonnes | 245.70 mi (395.42 km) |
| Watford to Cormeilles-en-Parisis | 217.79 mi (350.50 km) |
| Watford to Cosne sur Loire | 328.83 mi (529.21 km) |
