| Rhondda to Monroe (Washington) | 4,666.66 mi (7,510.27 km) |
| Rhondda to Monroe (Wisconsin) | 3,861.85 mi (6,215.05 km) |
| Rhondda to Monroeville (Pennsylvania) | 3,571.44 mi (5,747.67 km) |
| Rhondda to Monrovia (California) | 5,313.75 mi (8,551.65 km) |
| Rhondda to Monsey (New York) | 3,309.34 mi (5,325.87 km) |
| Rhondda to Montclair (California) | 5,309.24 mi (8,544.40 km) |
| Rhondda to Montclair (Virginia) | 3,553.19 mi (5,718.31 km) |
| Rhondda to Montebello (California) | 5,326.10 mi (8,571.53 km) |
| Rhondda to Monterey (California) | 5,301.02 mi (8,531.16 km) |
| Rhondda to Monterey Park (California) | 5,324.90 mi (8,569.59 km) |
| Rhondda to Montgomery (Alabama) | 4,215.12 mi (6,783.57 km) |
| Rhondda to Montgomery (Illinois) | 3,853.31 mi (6,201.30 km) |
| Rhondda to Montgomery (Ohio) | 3,808.87 mi (6,129.78 km) |
| Rhondda to Montgomery Village (Maryland) | 3,521.99 mi (5,668.10 km) |
| Rhondda to Montgomeryville (Pennsylvania) | 3,394.71 mi (5,463.26 km) |
