| Portsmouth to Bougival | 196.58 mi (316.37 km) |
| Portsmouth to Bouguenais | 251.86 mi (405.32 km) |
| Portsmouth to Boulogne-Billancourt | 201.33 mi (324.01 km) |
| Portsmouth to Boulogne-sur-Mer | 118.20 mi (190.22 km) |
| Portsmouth to Bourg-de-Peage | 489.10 mi (787.13 km) |
| Portsmouth to Bourg-en-Bresse | 429.37 mi (691.00 km) |
| Portsmouth to Bourg-la-Reine | 206.43 mi (332.21 km) |
| Portsmouth to Bourg-les-Valence | 490.26 mi (788.99 km) |
| Portsmouth to Bourges | 301.75 mi (485.62 km) |
| Portsmouth to Bourgoin-Jallieu | 464.28 mi (747.19 km) |
| Portsmouth to Bressuire | 275.36 mi (443.14 km) |
| Portsmouth to Brest | 225.97 mi (363.66 km) |
| Portsmouth to Bretigny-sur-Orge | 214.37 mi (344.99 km) |
| Portsmouth to Breuillet | 212.48 mi (341.95 km) |
| Portsmouth to Briancon | 542.50 mi (873.07 km) |
