| Catonsville to Bougival | 3,793.77 mi (6,105.49 km) |
| Catonsville to Bouguenais | 3,674.17 mi (5,913.01 km) |
| Catonsville to Boulogne-Billancourt | 3,798.82 mi (6,113.61 km) |
| Catonsville to Boulogne-sur-Mer | 3,725.78 mi (5,996.06 km) |
| Catonsville to Bourg-de-Peage | 4,026.01 mi (6,479.24 km) |
| Catonsville to Bourg-en-Bresse | 3,999.16 mi (6,436.03 km) |
| Catonsville to Bourg-la-Reine | 3,803.39 mi (6,120.96 km) |
| Catonsville to Bourg-les-Valence | 4,021.90 mi (6,472.63 km) |
| Catonsville to Bourges | 3,851.74 mi (6,198.77 km) |
| Catonsville to Bourgoin-Jallieu | 4,019.43 mi (6,468.64 km) |
| Catonsville to Bressuire | 3,732.37 mi (6,006.66 km) |
| Catonsville to Brest | 3,520.65 mi (5,665.94 km) |
| Catonsville to Bretigny-sur-Orge | 3,807.36 mi (6,127.35 km) |
| Catonsville to Breuillet | 3,802.83 mi (6,120.07 km) |
| Catonsville to Briancon | 4,099.88 mi (6,598.12 km) |
