| Watertown Town to Bougival | 3,432.37 mi (5,523.86 km) |
| Watertown Town to Bouguenais | 3,313.43 mi (5,332.45 km) |
| Watertown Town to Boulogne-Billancourt | 3,437.42 mi (5,531.99 km) |
| Watertown Town to Boulogne-sur-Mer | 3,364.54 mi (5,414.71 km) |
| Watertown Town to Bourg-de-Peage | 3,665.32 mi (5,898.76 km) |
| Watertown Town to Bourg-en-Bresse | 3,638.04 mi (5,854.86 km) |
| Watertown Town to Bourg-la-Reine | 3,441.98 mi (5,539.34 km) |
| Watertown Town to Bourg-les-Valence | 3,661.28 mi (5,892.26 km) |
| Watertown Town to Bourges | 3,490.61 mi (5,617.60 km) |
| Watertown Town to Bourgoin-Jallieu | 3,658.49 mi (5,887.77 km) |
| Watertown Town to Bressuire | 3,371.64 mi (5,426.13 km) |
| Watertown Town to Brest | 3,159.68 mi (5,085.01 km) |
| Watertown Town to Bretigny-sur-Orge | 3,445.96 mi (5,545.74 km) |
| Watertown Town to Breuillet | 3,441.44 mi (5,538.47 km) |
| Watertown Town to Briancon | 3,739.02 mi (6,017.38 km) |
