| Portchester to Bougival | 199.32 mi (320.77 km) |
| Portchester to Bouguenais | 254.21 mi (409.11 km) |
| Portchester to Boulogne-Billancourt | 204.06 mi (328.40 km) |
| Portchester to Boulogne-sur-Mer | 119.72 mi (192.67 km) |
| Portchester to Bourg-de-Peage | 491.95 mi (791.72 km) |
| Portchester to Bourg-en-Bresse | 432.16 mi (695.49 km) |
| Portchester to Bourg-la-Reine | 209.16 mi (336.61 km) |
| Portchester to Bourg-les-Valence | 493.12 mi (793.60 km) |
| Portchester to Bourges | 304.63 mi (490.26 km) |
| Portchester to Bourgoin-Jallieu | 467.10 mi (751.73 km) |
| Portchester to Bressuire | 278.00 mi (447.39 km) |
| Portchester to Brest | 226.80 mi (365.00 km) |
| Portchester to Bretigny-sur-Orge | 217.13 mi (349.44 km) |
| Portchester to Breuillet | 215.27 mi (346.44 km) |
| Portchester to Briancon | 545.29 mi (877.56 km) |
