| Watford to Coudekerque-Branche | 127.93 mi (205.88 km) |
| Watford to Coueron | 312.46 mi (502.86 km) |
| Watford to Coulommiers | 249.20 mi (401.05 km) |
| Watford to Courbevoic | 223.51 mi (359.70 km) |
| Watford to Courcouronnes | 243.91 mi (392.53 km) |
| Watford to Cournon-d'Auvergne | 440.03 mi (708.16 km) |
| Watford to Courrieres | 167.06 mi (268.85 km) |
| Watford to Coutras | 457.16 mi (735.73 km) |
| Watford to Couzeix | 406.13 mi (653.61 km) |
| Watford to Cran-Gevrier | 495.05 mi (796.70 km) |
| Watford to Craponne | 470.06 mi (756.50 km) |
| Watford to Creil | 208.44 mi (335.45 km) |
| Watford to Crepy-en-Valois | 220.95 mi (355.59 km) |
| Watford to Crest | 539.39 mi (868.06 km) |
| Watford to Creteil | 234.74 mi (377.78 km) |
