| Watford to Brownhills | 94.58 mi (152.20 km) |
| Watford to Broxbourne | 17.30 mi (27.84 km) |
| Watford to Broxburn | 321.11 mi (516.78 km) |
| Watford to Bryn | 158.88 mi (255.69 km) |
| Watford to Buckhurst Hill | 18.58 mi (29.90 km) |
| Watford to Buckie | 428.41 mi (689.46 km) |
| Watford to Buckingham | 34.46 mi (55.45 km) |
| Watford to Buckley | 154.39 mi (248.46 km) |
| Watford to Bucksburn | 388.15 mi (624.66 km) |
| Watford to Bude | 188.29 mi (303.03 km) |
| Watford to Bulwell | 98.96 mi (159.26 km) |
| Watford to Burbage | 72.60 mi (116.84 km) |
| Watford to Burgess Hill | 49.85 mi (80.22 km) |
| Watford to Burnham | 13.85 mi (22.29 km) |
| Watford to Burnham-on-Sea | 115.52 mi (185.91 km) |
