| Watford to Bois-Colombes | 222.69 mi (358.39 km) |
| Watford to Bois-d'Arcy | 224.44 mi (361.20 km) |
| Watford to Bois-Guillaume | 164.96 mi (265.47 km) |
| Watford to Boissy-Saint-Leger | 238.26 mi (383.44 km) |
| Watford to Bolbec | 148.85 mi (239.56 km) |
| Watford to Bollene | 562.04 mi (904.51 km) |
| Watford to Bondoufle | 243.45 mi (391.79 km) |
| Watford to Bondues | 164.83 mi (265.27 km) |
| Watford to Bondy | 228.72 mi (368.08 km) |
| Watford to Bonneuil-sur-Marne | 236.32 mi (380.33 km) |
| Watford to Bonneville | 493.38 mi (794.01 km) |
| Watford to Bordeaux | 470.95 mi (757.92 km) |
| Watford to Borgo | 778.82 mi (1,253.38 km) |
| Watford to Bouc-Bel-Air | 627.56 mi (1,009.96 km) |
| Watford to Boucau | 564.10 mi (907.84 km) |
