| Merthyr Tudful to Bay City (Texas) | 4,777.06 mi (7,687.94 km) |
| Merthyr Tudful to Bay Point (California) | 5,216.22 mi (8,394.70 km) |
| Merthyr Tudful to Bay Shore (New York) | 3,291.39 mi (5,296.98 km) |
| Merthyr Tudful to Bay Village (Ohio) | 3,610.14 mi (5,809.95 km) |
| Merthyr Tudful to Bayamón (Puerto Rico) | 4,070.59 mi (6,550.98 km) |
| Merthyr Tudful to Bayonet Point (Florida) | 4,264.68 mi (6,863.34 km) |
| Merthyr Tudful to Bayonne (New Jersey) | 3,329.69 mi (5,358.61 km) |
| Merthyr Tudful to Bayou Blue (Louisiana) | 4,530.08 mi (7,290.45 km) |
| Merthyr Tudful to Bayou Cane (Louisiana) | 4,533.74 mi (7,296.35 km) |
| Merthyr Tudful to Bayshore Gardens (Florida) | 4,304.92 mi (6,928.09 km) |
| Merthyr Tudful to Baytown (Texas) | 4,697.32 mi (7,559.61 km) |
| Merthyr Tudful to Beach Park (Illinois) | 3,799.46 mi (6,114.63 km) |
| Merthyr Tudful to Beachwood (New Jersey) | 3,365.08 mi (5,415.57 km) |
| Merthyr Tudful to Beachwood (Ohio) | 3,593.50 mi (5,783.17 km) |
| Merthyr Tudful to Beacon (New York) | 3,287.90 mi (5,291.36 km) |
