| Welwyn Garden City to Bougival | 227.74 mi (366.52 km) |
| Welwyn Garden City to Bouguenais | 326.15 mi (524.90 km) |
| Welwyn Garden City to Boulogne-Billancourt | 231.63 mi (372.78 km) |
| Welwyn Garden City to Boulogne-sur-Mer | 108.04 mi (173.88 km) |
| Welwyn Garden City to Bourg-de-Peage | 525.50 mi (845.71 km) |
| Welwyn Garden City to Bourg-en-Bresse | 458.12 mi (737.27 km) |
| Welwyn Garden City to Bourg-la-Reine | 236.59 mi (380.75 km) |
| Welwyn Garden City to Bourg-les-Valence | 527.99 mi (849.72 km) |
| Welwyn Garden City to Bourges | 346.31 mi (557.33 km) |
| Welwyn Garden City to Bourgoin-Jallieu | 496.52 mi (799.07 km) |
| Welwyn Garden City to Bressuire | 343.39 mi (552.63 km) |
| Welwyn Garden City to Brest | 303.17 mi (487.91 km) |
| Welwyn Garden City to Bretigny-sur-Orge | 246.82 mi (397.22 km) |
| Welwyn Garden City to Breuillet | 247.07 mi (397.62 km) |
| Welwyn Garden City to Briancon | 570.64 mi (918.36 km) |
