| Watford to Borgosatollo | 645.95 mi (1,039.56 km) |
| Watford to Borgosesia | 568.88 mi (915.52 km) |
| Watford to Boscoreale | 1,031.54 mi (1,660.11 km) |
| Watford to Boscotrecase | 1,030.10 mi (1,657.79 km) |
| Watford to Botticino Sera | 642.93 mi (1,034.69 km) |
| Watford to Bovalino Marina | 1,230.14 mi (1,979.73 km) |
| Watford to Boves | 624.43 mi (1,004.92 km) |
| Watford to Boville Ernica | 950.89 mi (1,530.31 km) |
| Watford to Bovisio Masciago | 602.43 mi (969.52 km) |
| Watford to Bovolone | 687.78 mi (1,106.87 km) |
| Watford to Bra | 611.78 mi (984.56 km) |
| Watford to Bracciano | 885.68 mi (1,425.36 km) |
| Watford to Brandizzo | 584.86 mi (941.24 km) |
| Watford to Breganze | 682.07 mi (1,097.68 km) |
| Watford to Brembate | 616.51 mi (992.18 km) |
