| Portici to Bougival | 814.45 mi (1,310.72 km) |
| Portici to Bouguenais | 904.43 mi (1,455.54 km) |
| Portici to Boulogne-Billancourt | 809.55 mi (1,302.85 km) |
| Portici to Boulogne-sur-Mer | 916.50 mi (1,474.97 km) |
| Portici to Bourg-de-Peage | 552.53 mi (889.21 km) |
| Portici to Bourg-en-Bresse | 588.37 mi (946.89 km) |
| Portici to Bourg-la-Reine | 804.52 mi (1,294.75 km) |
| Portici to Bourg-les-Valence | 556.27 mi (895.23 km) |
| Portici to Bourges | 733.77 mi (1,180.89 km) |
| Portici to Bourgoin-Jallieu | 562.47 mi (905.20 km) |
| Portici to Bressuire | 846.19 mi (1,361.81 km) |
| Portici to Brest | 1,059.71 mi (1,705.44 km) |
| Portici to Bretigny-sur-Orge | 797.65 mi (1,283.69 km) |
| Portici to Breuillet | 800.60 mi (1,288.44 km) |
| Portici to Briancon | 480.95 mi (774.02 km) |
