| Pontypridd to Mauldin (South Carolina) | 3,937.77 mi (6,337.23 km) |
| Pontypridd to Maumee (Ohio) | 3,680.13 mi (5,922.59 km) |
| Pontypridd to Maumelle (Arkansas) | 4,342.86 mi (6,989.17 km) |
| Pontypridd to Mayagüez (Puerto Rico) | 4,121.26 mi (6,632.52 km) |
| Pontypridd to Mayfield Heights (Ohio) | 3,594.71 mi (5,785.12 km) |
| Pontypridd to Mays Chapel (Maryland) | 3,491.73 mi (5,619.40 km) |
| Pontypridd to Maywood (California) | 5,333.28 mi (8,583.08 km) |
| Pontypridd to Maywood (Illinois) | 3,829.46 mi (6,162.93 km) |
| Pontypridd to McAlester (Oklahoma) | 4,471.54 mi (7,196.25 km) |
| Pontypridd to McAllen (Texas) | 5,017.65 mi (8,075.12 km) |
| Pontypridd to McCalla (Alabama) | 4,203.07 mi (6,764.18 km) |
| Pontypridd to McComb (Mississippi) | 4,445.18 mi (7,153.82 km) |
| Pontypridd to McDonough (Georgia) | 4,078.23 mi (6,563.28 km) |
| Pontypridd to McFarland (California) | 5,272.35 mi (8,485.02 km) |
| Pontypridd to McHenry (Illinois) | 3,825.84 mi (6,157.09 km) |
