| North Potomac to Bougival | 3,821.85 mi (6,150.67 km) |
| North Potomac to Bouguenais | 3,702.59 mi (5,958.74 km) |
| North Potomac to Boulogne-Billancourt | 3,826.90 mi (6,158.80 km) |
| North Potomac to Boulogne-sur-Mer | 3,753.59 mi (6,040.82 km) |
| North Potomac to Bourg-de-Peage | 4,054.44 mi (6,524.99 km) |
| North Potomac to Bourg-en-Bresse | 4,027.46 mi (6,481.58 km) |
| North Potomac to Bourg-la-Reine | 3,831.47 mi (6,166.15 km) |
| North Potomac to Bourg-les-Valence | 4,050.35 mi (6,518.41 km) |
| North Potomac to Bourges | 3,880.04 mi (6,244.31 km) |
| North Potomac to Bourgoin-Jallieu | 4,047.79 mi (6,514.29 km) |
| North Potomac to Bressuire | 3,760.79 mi (6,052.40 km) |
| North Potomac to Brest | 3,549.00 mi (5,711.57 km) |
| North Potomac to Bretigny-sur-Orge | 3,835.46 mi (6,172.58 km) |
| North Potomac to Breuillet | 3,830.95 mi (6,165.32 km) |
| North Potomac to Briancon | 4,128.27 mi (6,643.80 km) |
