| Merthyr Tudful to Beocin | 1,144.89 mi (1,842.53 km) |
| Merthyr Tudful to Blace | 1,281.94 mi (2,063.08 km) |
| Merthyr Tudful to Bogatic | 1,148.03 mi (1,847.58 km) |
| Merthyr Tudful to Bojnik | 1,310.83 mi (2,109.58 km) |
| Merthyr Tudful to Boljevac | 1,288.25 mi (2,073.23 km) |
| Merthyr Tudful to Bor | 1,282.83 mi (2,064.52 km) |
| Merthyr Tudful to Borca | 1,186.65 mi (1,909.73 km) |
| Merthyr Tudful to Bosilegrad | 1,362.72 mi (2,193.09 km) |
| Merthyr Tudful to Brus | 1,267.94 mi (2,040.56 km) |
| Merthyr Tudful to Bujanovac | 1,335.44 mi (2,149.18 km) |
| Merthyr Tudful to Cacak | 1,219.77 mi (1,963.04 km) |
| Merthyr Tudful to Cajetina | 1,199.59 mi (1,930.55 km) |
| Merthyr Tudful to Cicevac | 1,271.77 mi (2,046.71 km) |
| Merthyr Tudful to Coka | 1,136.66 mi (1,829.27 km) |
| Merthyr Tudful to Crna Trava | 1,342.89 mi (2,161.17 km) |
