| Key Largo to Bougival | 4,602.38 mi (7,406.82 km) |
| Key Largo to Bouguenais | 4,454.24 mi (7,168.40 km) |
| Key Largo to Boulogne-Billancourt | 4,607.32 mi (7,414.77 km) |
| Key Largo to Boulogne-sur-Mer | 4,553.98 mi (7,328.92 km) |
| Key Largo to Bourg-de-Peage | 4,798.54 mi (7,722.50 km) |
| Key Largo to Bourg-en-Bresse | 4,785.60 mi (7,701.68 km) |
| Key Largo to Bourg-la-Reine | 4,611.43 mi (7,421.38 km) |
| Key Largo to Bourg-les-Valence | 4,792.91 mi (7,713.44 km) |
| Key Largo to Bourges | 4,640.54 mi (7,468.23 km) |
| Key Largo to Bourgoin-Jallieu | 4,798.94 mi (7,723.15 km) |
| Key Largo to Bressuire | 4,511.00 mi (7,259.75 km) |
| Key Largo to Brest | 4,309.72 mi (6,935.82 km) |
| Key Largo to Bretigny-sur-Orge | 4,613.48 mi (7,424.67 km) |
| Key Largo to Breuillet | 4,608.13 mi (7,416.07 km) |
| Key Largo to Briancon | 4,875.73 mi (7,846.72 km) |
