| Rhondda to Marietta (Georgia) | 4,066.20 mi (6,543.92 km) |
| Rhondda to Marietta (Ohio) | 3,684.35 mi (5,929.39 km) |
| Rhondda to Marina (California) | 5,293.07 mi (8,518.37 km) |
| Rhondda to Marinette (Wisconsin) | 3,674.40 mi (5,913.38 km) |
| Rhondda to Marion (Arkansas) | 4,235.03 mi (6,815.63 km) |
| Rhondda to Marion (Illinois) | 4,062.59 mi (6,538.11 km) |
| Rhondda to Marion (Indiana) | 3,801.57 mi (6,118.04 km) |
| Rhondda to Marion (Iowa) | 3,961.53 mi (6,375.47 km) |
| Rhondda to Marion (Ohio) | 3,698.82 mi (5,952.67 km) |
| Rhondda to Marion Oaks (Florida) | 4,210.53 mi (6,776.20 km) |
| Rhondda to Markham (Illinois) | 3,832.96 mi (6,168.55 km) |
| Rhondda to Marlborough (Massachusetts) | 3,154.34 mi (5,076.43 km) |
| Rhondda to Marlton (New Jersey) | 3,397.00 mi (5,466.94 km) |
| Rhondda to Marquette (Michigan) | 3,602.59 mi (5,797.81 km) |
| Rhondda to Marrero (Louisiana) | 4,495.38 mi (7,234.61 km) |
