| Watford to Cervignano del Friuli | 742.36 mi (1,194.71 km) |
| Watford to Cesa | 1,012.60 mi (1,629.63 km) |
| Watford to Cesano Maderno | 601.58 mi (968.15 km) |
| Watford to Cesena | 780.70 mi (1,256.41 km) |
| Watford to Cesenatico | 782.84 mi (1,259.86 km) |
| Watford to Cetraro | 1,148.20 mi (1,847.84 km) |
| Watford to Cherasco | 615.07 mi (989.86 km) |
| Watford to Chiampo | 678.83 mi (1,092.47 km) |
| Watford to Chiaravalle | 845.15 mi (1,360.13 km) |
| Watford to Chiari | 631.70 mi (1,016.62 km) |
| Watford to Chiavari | 676.71 mi (1,089.06 km) |
| Watford to Chieri | 593.41 mi (955.00 km) |
| Watford to Chieti | 937.12 mi (1,508.15 km) |
| Watford to Chioggia | 729.92 mi (1,174.69 km) |
| Watford to Chiusi | 828.76 mi (1,333.75 km) |
