| Os to Bougival | 796.08 mi (1,281.17 km) |
| Os to Bouguenais | 945.90 mi (1,522.28 km) |
| Os to Boulogne-Billancourt | 797.46 mi (1,283.39 km) |
| Os to Boulogne-sur-Mer | 673.32 mi (1,083.60 km) |
| Os to Bourg-de-Peage | 1,049.61 mi (1,689.19 km) |
| Os to Bourg-en-Bresse | 968.83 mi (1,559.18 km) |
| Os to Bourg-la-Reine | 800.80 mi (1,288.76 km) |
| Os to Bourg-les-Valence | 1,055.98 mi (1,699.43 km) |
| Os to Bourges | 916.52 mi (1,475.00 km) |
| Os to Bourgoin-Jallieu | 1,011.62 mi (1,628.04 km) |
| Os to Bressuire | 955.88 mi (1,538.34 km) |
| Os to Brest | 908.89 mi (1,462.71 km) |
| Os to Bretigny-sur-Orge | 812.37 mi (1,307.38 km) |
| Os to Breuillet | 816.31 mi (1,313.73 km) |
| Os to Briancon | 1,060.35 mi (1,706.47 km) |
