| Watford to Carterton | 51.65 mi (83.12 km) |
| Watford to Castle Bromwich | 83.26 mi (133.99 km) |
| Watford to Castleford | 147.97 mi (238.13 km) |
| Watford to Castleton | 153.12 mi (246.42 km) |
| Watford to Caterham | 29.21 mi (47.00 km) |
| Watford to Catford | 21.67 mi (34.88 km) |
| Watford to Caversham | 27.99 mi (45.05 km) |
| Watford to Chaddesden | 98.50 mi (158.52 km) |
| Watford to Chalfont Saint Peter | 7.63 mi (12.28 km) |
| Watford to Chandlers Ford | 62.87 mi (101.18 km) |
| Watford to Chapel en le Frith | 131.76 mi (212.05 km) |
| Watford to Chapeltown | 132.70 mi (213.55 km) |
| Watford to Chard | 123.28 mi (198.39 km) |
| Watford to Charlton Kings | 72.17 mi (116.15 km) |
| Watford to Chatham | 44.02 mi (70.85 km) |
