| Watford to Bispham | 187.80 mi (302.24 km) |
| Watford to Blackburn | 168.93 mi (271.86 km) |
| Watford to Blackpool | 185.96 mi (299.27 km) |
| Watford to Blairgowrie | 361.24 mi (581.36 km) |
| Watford to Blandford Forum | 94.34 mi (151.83 km) |
| Watford to Blaydon | 234.99 mi (378.18 km) |
| Watford to Bletchley | 27.47 mi (44.22 km) |
| Watford to Bloxwich | 95.09 mi (153.03 km) |
| Watford to Blunsdon Saint Andrew | 59.88 mi (96.36 km) |
| Watford to Blyth | 244.20 mi (393.00 km) |
| Watford to Bo'ness | 328.53 mi (528.71 km) |
| Watford to Bodmin | 204.85 mi (329.67 km) |
| Watford to Bognor Regis | 61.50 mi (98.98 km) |
| Watford to Bolsover | 115.14 mi (185.31 km) |
| Watford to Bolton | 157.87 mi (254.07 km) |
