| Merthyr Tudful to Boppard | 487.87 mi (785.15 km) |
| Merthyr Tudful to Borgentreich | 540.76 mi (870.28 km) |
| Merthyr Tudful to Borgholzhausen | 497.70 mi (800.98 km) |
| Merthyr Tudful to Borken | 437.53 mi (704.14 km) |
| Merthyr Tudful to Borna | 684.00 mi (1,100.79 km) |
| Merthyr Tudful to Bornheim | 453.74 mi (730.22 km) |
| Merthyr Tudful to Bosel | 485.37 mi (781.12 km) |
| Merthyr Tudful to Bottrop | 441.64 mi (710.75 km) |
| Merthyr Tudful to Bovenden | 569.28 mi (916.17 km) |
| Merthyr Tudful to Brackenheim | 577.07 mi (928.71 km) |
| Merthyr Tudful to Brake | 509.79 mi (820.43 km) |
| Merthyr Tudful to Brakel | 536.89 mi (864.04 km) |
| Merthyr Tudful to Bramsche | 484.14 mi (779.15 km) |
| Merthyr Tudful to Brand | 418.10 mi (672.87 km) |
| Merthyr Tudful to Brand-Erbisdorf | 722.27 mi (1,162.39 km) |
