| Merthyr Tudful to Barking | 148.92 mi (239.66 km) |
| Merthyr Tudful to Barnet | 136.28 mi (219.32 km) |
| Merthyr Tudful to Barnoldswick | 158.03 mi (254.33 km) |
| Merthyr Tudful to Barnsley | 148.33 mi (238.71 km) |
| Merthyr Tudful to Barnstaple | 54.43 mi (87.59 km) |
| Merthyr Tudful to Barrhead | 283.40 mi (456.08 km) |
| Merthyr Tudful to Barri | 23.81 mi (38.32 km) |
| Merthyr Tudful to Barrow in Furness | 163.72 mi (263.48 km) |
| Merthyr Tudful to Barton upon Humber | 181.61 mi (292.27 km) |
| Merthyr Tudful to Barton upon Irwell | 127.12 mi (204.59 km) |
| Merthyr Tudful to Barwell | 103.28 mi (166.22 km) |
| Merthyr Tudful to Basford | 126.36 mi (203.35 km) |
| Merthyr Tudful to Basildon | 166.14 mi (267.38 km) |
| Merthyr Tudful to Basingstoke | 103.85 mi (167.13 km) |
| Merthyr Tudful to Bath | 50.41 mi (81.12 km) |
