| Watford to Bitonto | 1,087.25 mi (1,749.77 km) |
| Watford to Bitritto | 1,095.92 mi (1,763.71 km) |
| Watford to Bollate | 604.74 mi (973.23 km) |
| Watford to Bologna | 732.20 mi (1,178.35 km) |
| Watford to Bolzano | 638.96 mi (1,028.31 km) |
| Watford to Bomporto | 709.72 mi (1,142.18 km) |
| Watford to Bonate di Sopra | 612.93 mi (986.41 km) |
| Watford to Bondeno | 715.42 mi (1,151.35 km) |
| Watford to Bordighera | 659.63 mi (1,061.57 km) |
| Watford to Borgaro Torinese | 580.85 mi (934.78 km) |
| Watford to Borgo a Buggiano | 743.69 mi (1,196.86 km) |
| Watford to Borgo San Dalmazzo | 622.63 mi (1,002.03 km) |
| Watford to Borgo San Lorenzo | 761.29 mi (1,225.18 km) |
| Watford to Borgomanero | 576.08 mi (927.11 km) |
| Watford to Borgoricco | 704.94 mi (1,134.50 km) |
