| Grefrath to Bougival | 252.57 mi (406.47 km) |
| Grefrath to Bouguenais | 459.44 mi (739.39 km) |
| Grefrath to Boulogne-Billancourt | 250.73 mi (403.51 km) |
| Grefrath to Boulogne-sur-Mer | 209.60 mi (337.32 km) |
| Grefrath to Bourg-de-Peage | 439.21 mi (706.84 km) |
| Grefrath to Bourg-en-Bresse | 358.08 mi (576.28 km) |
| Grefrath to Bourg-la-Reine | 251.12 mi (404.13 km) |
| Grefrath to Bourg-les-Valence | 446.40 mi (718.41 km) |
| Grefrath to Bourges | 343.40 mi (552.65 km) |
| Grefrath to Bourgoin-Jallieu | 400.29 mi (644.20 km) |
| Grefrath to Bressuire | 437.83 mi (704.63 km) |
| Grefrath to Brest | 522.94 mi (841.59 km) |
| Grefrath to Bretigny-sur-Orge | 259.91 mi (418.29 km) |
| Grefrath to Breuillet | 266.36 mi (428.67 km) |
| Grefrath to Briancon | 445.20 mi (716.48 km) |
