| Merthyr Tudful to Beverly Hills (Florida) | 4,225.53 mi (6,800.34 km) |
| Merthyr Tudful to Beverly Hills (Michigan) | 3,616.05 mi (5,819.47 km) |
| Merthyr Tudful to Bexley (Ohio) | 3,718.22 mi (5,983.90 km) |
| Merthyr Tudful to Biddeford (Maine) | 3,063.28 mi (4,929.87 km) |
| Merthyr Tudful to Big Bear City (California) | 5,264.56 mi (8,472.49 km) |
| Merthyr Tudful to Big Lake (Minnesota) | 3,885.52 mi (6,253.14 km) |
| Merthyr Tudful to Big Spring (Texas) | 4,823.65 mi (7,762.91 km) |
| Merthyr Tudful to Billings (Montana) | 4,371.36 mi (7,035.03 km) |
| Merthyr Tudful to Biloxi (Mississippi) | 4,418.92 mi (7,111.56 km) |
| Merthyr Tudful to Binghamton (New York) | 3,341.77 mi (5,378.05 km) |
| Merthyr Tudful to Birmingham (Alabama) | 4,178.08 mi (6,723.96 km) |
| Merthyr Tudful to Birmingham (Michigan) | 3,614.05 mi (5,816.25 km) |
| Merthyr Tudful to Bismarck (North Dakota) | 4,062.64 mi (6,538.19 km) |
| Merthyr Tudful to Bithlo (Florida) | 4,186.44 mi (6,737.42 km) |
| Merthyr Tudful to Bixby (Oklahoma) | 4,418.82 mi (7,111.41 km) |
