| Rhondda to Mount Holly (North Carolina) | 3,855.78 mi (6,205.28 km) |
| Rhondda to Mount Juliet (Tennessee) | 4,038.73 mi (6,499.71 km) |
| Rhondda to Mount Kisco (New York) | 3,291.83 mi (5,297.68 km) |
| Rhondda to Mount Pleasant (Michigan) | 3,630.69 mi (5,843.03 km) |
| Rhondda to Mount Pleasant (South Carolina) | 3,923.03 mi (6,313.51 km) |
| Rhondda to Mount Pleasant (Texas) | 4,525.87 mi (7,283.68 km) |
| Rhondda to Mount Pleasant (Wisconsin) | 3,789.95 mi (6,099.34 km) |
| Rhondda to Mount Prospect (Illinois) | 3,821.33 mi (6,149.83 km) |
| Rhondda to Mount Sinai (New York) | 3,273.74 mi (5,268.57 km) |
| Rhondda to Mount Vernon (Illinois) | 4,034.05 mi (6,492.18 km) |
| Rhondda to Mount Vernon (New York) | 3,308.19 mi (5,324.01 km) |
| Rhondda to Mount Vernon (Ohio) | 3,682.42 mi (5,926.27 km) |
| Rhondda to Mount Vernon (Virginia) | 3,538.89 mi (5,695.29 km) |
| Rhondda to Mount Vernon (Washington) | 4,644.25 mi (7,474.20 km) |
| Rhondda to Mount Washington (Kentucky) | 3,913.18 mi (6,297.65 km) |
