| Rhondda to Mill Creek East (Washington) | 4,673.50 mi (7,521.28 km) |
| Rhondda to Mill Valley (California) | 5,246.01 mi (8,442.64 km) |
| Rhondda to Millbrae (California) | 5,259.45 mi (8,464.27 km) |
| Rhondda to Millbrook (Alabama) | 4,211.93 mi (6,778.45 km) |
| Rhondda to Millcreek (Utah) | 4,750.59 mi (7,645.33 km) |
| Rhondda to Milledgeville (Georgia) | 4,054.29 mi (6,524.76 km) |
| Rhondda to Miller Place (New York) | 3,272.43 mi (5,266.47 km) |
| Rhondda to Millington (Tennessee) | 4,216.37 mi (6,785.58 km) |
| Rhondda to Millville (New Jersey) | 3,424.49 mi (5,511.18 km) |
| Rhondda to Milpitas (California) | 5,253.25 mi (8,454.29 km) |
| Rhondda to Milton (Georgia) | 4,048.06 mi (6,514.73 km) |
| Rhondda to Milwaukee (Wisconsin) | 3,777.15 mi (6,078.73 km) |
| Rhondda to Milwaukie (Oregon) | 4,819.76 mi (7,756.66 km) |
| Rhondda to Minden (Louisiana) | 4,485.77 mi (7,219.15 km) |
| Rhondda to Mineola (New York) | 3,307.45 mi (5,322.83 km) |
