| Pontypridd to McKeesport (Pennsylvania) | 3,581.92 mi (5,764.54 km) |
| Pontypridd to McKinleyville (California) | 5,120.40 mi (8,240.49 km) |
| Pontypridd to McKinney (Texas) | 4,593.59 mi (7,392.66 km) |
| Pontypridd to McLean (Virginia) | 3,535.76 mi (5,690.26 km) |
| Pontypridd to McMinnville (Oregon) | 4,851.72 mi (7,808.09 km) |
| Pontypridd to McMinnville (Tennessee) | 4,037.03 mi (6,496.98 km) |
| Pontypridd to McNair (Virginia) | 3,544.35 mi (5,704.09 km) |
| Pontypridd to McPherson (Kansas) | 4,371.35 mi (7,035.01 km) |
| Pontypridd to Mead Valley (California) | 5,311.97 mi (8,548.80 km) |
| Pontypridd to Meadow Woods (Florida) | 4,209.41 mi (6,774.40 km) |
| Pontypridd to Meadowbrook (Virginia) | 3,615.23 mi (5,818.16 km) |
| Pontypridd to Meadville (Pennsylvania) | 3,536.77 mi (5,691.88 km) |
| Pontypridd to Mebane (North Carolina) | 3,751.41 mi (6,037.32 km) |
| Pontypridd to Mechanicsville (Virginia) | 3,601.47 mi (5,796.01 km) |
| Pontypridd to Medford (Massachusetts) | 3,136.67 mi (5,047.98 km) |
