| Merthyr Tudful to Belvedere Park (Georgia) | 4,063.59 mi (6,539.72 km) |
| Merthyr Tudful to Belvidere (Illinois) | 3,845.86 mi (6,189.31 km) |
| Merthyr Tudful to Bemidji (Minnesota) | 3,827.91 mi (6,160.42 km) |
| Merthyr Tudful to Benbrook (Texas) | 4,645.97 mi (7,476.96 km) |
| Merthyr Tudful to Bend (Oregon) | 4,855.17 mi (7,813.65 km) |
| Merthyr Tudful to Benicia (California) | 5,219.79 mi (8,400.44 km) |
| Merthyr Tudful to Bensenville (Illinois) | 3,824.12 mi (6,154.32 km) |
| Merthyr Tudful to Bensville (Maryland) | 3,538.42 mi (5,694.53 km) |
| Merthyr Tudful to Benton (Arkansas) | 4,358.08 mi (7,013.65 km) |
| Merthyr Tudful to Bentonville (Arkansas) | 4,334.79 mi (6,976.16 km) |
| Merthyr Tudful to Berea (Kentucky) | 3,882.04 mi (6,247.54 km) |
| Merthyr Tudful to Berea (Ohio) | 3,612.57 mi (5,813.87 km) |
| Merthyr Tudful to Berea (South Carolina) | 3,935.60 mi (6,333.74 km) |
| Merthyr Tudful to Bergenfield (New Jersey) | 3,313.87 mi (5,333.16 km) |
| Merthyr Tudful to Berkeley (California) | 5,235.02 mi (8,424.95 km) |
