| Merthyr Tudful to Brownhills | 87.44 mi (140.72 km) |
| Merthyr Tudful to Broxbourne | 143.57 mi (231.05 km) |
| Merthyr Tudful to Broxburn | 289.59 mi (466.06 km) |
| Merthyr Tudful to Bryn | 125.04 mi (201.23 km) |
| Merthyr Tudful to Buckhurst Hill | 146.42 mi (235.65 km) |
| Merthyr Tudful to Buckie | 410.26 mi (660.25 km) |
| Merthyr Tudful to Buckingham | 103.52 mi (166.60 km) |
| Merthyr Tudful to Buckley | 99.50 mi (160.12 km) |
| Merthyr Tudful to Bucksburn | 378.53 mi (609.19 km) |
| Merthyr Tudful to Bude | 81.01 mi (130.37 km) |
| Merthyr Tudful to Bulwell | 126.56 mi (203.67 km) |
| Merthyr Tudful to Burbage | 101.72 mi (163.71 km) |
| Merthyr Tudful to Burgess Hill | 150.54 mi (242.28 km) |
| Merthyr Tudful to Burnham | 117.38 mi (188.90 km) |
| Merthyr Tudful to Burnham-on-Sea | 38.64 mi (62.18 km) |
