| Watford to Busto Arsizio | 592.97 mi (954.29 km) |
| Watford to Busto Garolfo | 597.40 mi (961.42 km) |
| Watford to Cabras | 915.46 mi (1,473.29 km) |
| Watford to Cadelbosco di Sopra | 693.49 mi (1,116.06 km) |
| Watford to Cadoneghe | 706.79 mi (1,137.47 km) |
| Watford to Cagli | 824.18 mi (1,326.39 km) |
| Watford to Cagliari | 972.62 mi (1,565.29 km) |
| Watford to Cairo Montenotte | 640.56 mi (1,030.88 km) |
| Watford to Caivano | 1,015.67 mi (1,634.56 km) |
| Watford to Calcinaia | 750.67 mi (1,208.09 km) |
| Watford to Calcinato | 652.81 mi (1,050.60 km) |
| Watford to Calderara di Reno | 725.96 mi (1,168.33 km) |
| Watford to Caldogno | 684.05 mi (1,100.88 km) |
| Watford to Calenzano | 758.54 mi (1,220.75 km) |
| Watford to Calolziocorte | 602.66 mi (969.89 km) |
