| Merthyr Tudful to Bridgeton (Missouri) | 4,069.58 mi (6,549.36 km) |
| Merthyr Tudful to Bridgetown (Ohio) | 3,823.19 mi (6,152.83 km) |
| Merthyr Tudful to Bridgeview (Illinois) | 3,828.78 mi (6,161.83 km) |
| Merthyr Tudful to Brigham City (Utah) | 4,709.77 mi (7,579.65 km) |
| Merthyr Tudful to Brighton (Colorado) | 4,543.82 mi (7,312.57 km) |
| Merthyr Tudful to Bristol (Connecticut) | 3,238.43 mi (5,211.74 km) |
| Merthyr Tudful to Bristol (Tennessee) | 3,846.24 mi (6,189.92 km) |
| Merthyr Tudful to Bristol (Virginia) | 3,841.14 mi (6,181.72 km) |
| Merthyr Tudful to Broadlands (Virginia) | 3,541.49 mi (5,699.48 km) |
| Merthyr Tudful to Broadview Heights (Ohio) | 3,607.38 mi (5,805.51 km) |
| Merthyr Tudful to Brock Hall (Maryland) | 3,516.81 mi (5,659.76 km) |
| Merthyr Tudful to Brockton (Massachusetts) | 3,143.00 mi (5,058.16 km) |
| Merthyr Tudful to Broken Arrow (Oklahoma) | 4,410.45 mi (7,097.93 km) |
| Merthyr Tudful to Bronx (New York) | 3,311.59 mi (5,329.48 km) |
| Merthyr Tudful to Brook Park (Ohio) | 3,609.38 mi (5,808.74 km) |
