| Watford to Benisa | 894.36 mi (1,439.34 km) |
| Watford to Berga | 668.53 mi (1,075.90 km) |
| Watford to Berja | 1,030.84 mi (1,658.98 km) |
| Watford to Bermeo | 579.20 mi (932.12 km) |
| Watford to Berriozar | 612.23 mi (985.29 km) |
| Watford to Betanzos | 683.34 mi (1,099.72 km) |
| Watford to Betera | 833.46 mi (1,341.33 km) |
| Watford to Bilbao | 592.05 mi (952.81 km) |
| Watford to Binefar | 678.25 mi (1,091.54 km) |
| Watford to Binisalem | 841.52 mi (1,354.30 km) |
| Watford to Blanes | 705.81 mi (1,135.89 km) |
| Watford to Boadilla del Monte | 794.65 mi (1,278.86 km) |
| Watford to Boiro | 738.34 mi (1,188.25 km) |
| Watford to Bolanos de Calatrava | 896.86 mi (1,443.36 km) |
| Watford to Bollullos de la Mitacion | 1,028.34 mi (1,654.95 km) |
