| Watford to Belvedere Marittimo | 1,139.10 mi (1,833.21 km) |
| Watford to Benevento | 1,021.64 mi (1,644.17 km) |
| Watford to Bergamo | 615.83 mi (991.08 km) |
| Watford to Bernalda | 1,123.54 mi (1,808.16 km) |
| Watford to Bertinoro | 776.33 mi (1,249.39 km) |
| Watford to Besana in Brianza | 602.63 mi (969.84 km) |
| Watford to Besozzo | 574.79 mi (925.03 km) |
| Watford to Biancavilla | 1,219.19 mi (1,962.09 km) |
| Watford to Biassono | 605.43 mi (974.35 km) |
| Watford to Bibbiano | 694.17 mi (1,117.16 km) |
| Watford to Bibbiena | 788.55 mi (1,269.05 km) |
| Watford to Biella | 570.58 mi (918.26 km) |
| Watford to Bisceglie | 1,074.57 mi (1,729.35 km) |
| Watford to Bisignano | 1,158.19 mi (1,863.93 km) |
| Watford to Bitetto | 1,093.86 mi (1,760.39 km) |
