| Watford to Cortona | 816.31 mi (1,313.72 km) |
| Watford to Cosenza | 1,168.92 mi (1,881.19 km) |
| Watford to Cossato | 573.67 mi (923.23 km) |
| Watford to Costa Volpino | 623.92 mi (1,004.10 km) |
| Watford to Creazzo | 686.75 mi (1,105.21 km) |
| Watford to Crema | 632.67 mi (1,018.18 km) |
| Watford to Cremona | 656.07 mi (1,055.85 km) |
| Watford to Crevalcore | 714.50 mi (1,149.88 km) |
| Watford to Crispiano | 1,133.02 mi (1,823.42 km) |
| Watford to Crosia | 1,171.53 mi (1,885.39 km) |
| Watford to Crotone | 1,209.30 mi (1,946.17 km) |
| Watford to Cuneo | 621.53 mi (1,000.26 km) |
| Watford to Cuorgne | 567.60 mi (913.47 km) |
| Watford to Cusano Milanino | 606.91 mi (976.73 km) |
| Watford to Cutro | 1,207.58 mi (1,943.41 km) |
