| Grefrath to Blumberg | 260.81 mi (419.73 km) |
| Grefrath to Bobenheim-Roxheim | 150.18 mi (241.69 km) |
| Grefrath to Bobingen | 291.14 mi (468.54 km) |
| Grefrath to Boblingen | 218.24 mi (351.23 km) |
| Grefrath to Bocholt | 36.32 mi (58.46 km) |
| Grefrath to Bochum | 39.03 mi (62.81 km) |
| Grefrath to Bockenem | 168.99 mi (271.96 km) |
| Grefrath to Bockhorn | 159.14 mi (256.12 km) |
| Grefrath to Bogen | 326.75 mi (525.86 km) |
| Grefrath to Bohl-Iggelheim | 161.10 mi (259.26 km) |
| Grefrath to Bohmte | 110.36 mi (177.60 km) |
| Grefrath to Boizenburg | 231.85 mi (373.13 km) |
| Grefrath to Bonen | 63.68 mi (102.49 km) |
| Grefrath to Bonn | 53.14 mi (85.52 km) |
| Grefrath to Bopfingen | 246.83 mi (397.24 km) |
