| South Portland to Bougival | 3,346.73 mi (5,386.05 km) |
| South Portland to Bouguenais | 3,230.74 mi (5,199.37 km) |
| South Portland to Boulogne-Billancourt | 3,351.79 mi (5,394.18 km) |
| South Portland to Boulogne-sur-Mer | 3,277.18 mi (5,274.12 km) |
| South Portland to Bourg-de-Peage | 3,582.70 mi (5,765.79 km) |
| South Portland to Bourg-en-Bresse | 3,554.16 mi (5,719.86 km) |
| South Portland to Bourg-la-Reine | 3,356.39 mi (5,401.59 km) |
| South Portland to Bourg-les-Valence | 3,578.81 mi (5,759.53 km) |
| South Portland to Bourges | 3,406.75 mi (5,482.64 km) |
| South Portland to Bourgoin-Jallieu | 3,575.22 mi (5,753.76 km) |
| South Portland to Bressuire | 3,288.97 mi (5,293.09 km) |
| South Portland to Brest | 3,076.41 mi (4,951.00 km) |
| South Portland to Bretigny-sur-Orge | 3,360.54 mi (5,408.27 km) |
| South Portland to Breuillet | 3,356.11 mi (5,401.13 km) |
| South Portland to Briancon | 3,655.96 mi (5,883.70 km) |
