| Watford to Bougival | 222.90 mi (358.73 km) |
| Watford to Bouguenais | 314.22 mi (505.69 km) |
| Watford to Boulogne-Billancourt | 226.97 mi (365.27 km) |
| Watford to Boulogne-sur-Mer | 108.14 mi (174.03 km) |
| Watford to Bourg-de-Peage | 520.78 mi (838.12 km) |
| Watford to Bourg-en-Bresse | 454.62 mi (731.64 km) |
| Watford to Bourg-la-Reine | 231.98 mi (373.34 km) |
| Watford to Bourg-les-Valence | 523.04 mi (841.75 km) |
| Watford to Bourges | 339.80 mi (546.86 km) |
| Watford to Bourgoin-Jallieu | 492.49 mi (792.58 km) |
| Watford to Bressuire | 332.71 mi (535.45 km) |
| Watford to Brest | 289.60 mi (466.07 km) |
| Watford to Bretigny-sur-Orge | 241.91 mi (389.31 km) |
| Watford to Breuillet | 241.81 mi (389.15 km) |
| Watford to Briancon | 567.43 mi (913.19 km) |
