| Merthyr Tudful to Belvedere Marittimo | 1,243.98 mi (2,001.99 km) |
| Merthyr Tudful to Benevento | 1,128.11 mi (1,815.52 km) |
| Merthyr Tudful to Bergamo | 725.20 mi (1,167.10 km) |
| Merthyr Tudful to Bernalda | 1,232.55 mi (1,983.59 km) |
| Merthyr Tudful to Bertinoro | 886.17 mi (1,426.15 km) |
| Merthyr Tudful to Besana in Brianza | 710.73 mi (1,143.81 km) |
| Merthyr Tudful to Besozzo | 681.46 mi (1,096.70 km) |
| Merthyr Tudful to Biancavilla | 1,315.96 mi (2,117.83 km) |
| Merthyr Tudful to Biassono | 713.12 mi (1,147.66 km) |
| Merthyr Tudful to Bibbiano | 801.21 mi (1,289.42 km) |
| Merthyr Tudful to Bibbiena | 895.68 mi (1,441.46 km) |
| Merthyr Tudful to Biella | 673.18 mi (1,083.38 km) |
| Merthyr Tudful to Bisceglie | 1,185.42 mi (1,907.76 km) |
| Merthyr Tudful to Bisignano | 1,263.85 mi (2,033.97 km) |
| Merthyr Tudful to Bitetto | 1,204.67 mi (1,938.73 km) |
