| Pontneddfechan to Mauldin (South Carolina) | 3,924.74 mi (6,316.27 km) |
| Pontneddfechan to Maumee (Ohio) | 3,666.30 mi (5,900.34 km) |
| Pontneddfechan to Maumelle (Arkansas) | 4,329.06 mi (6,966.96 km) |
| Pontneddfechan to Mayagüez (Puerto Rico) | 4,112.54 mi (6,618.50 km) |
| Pontneddfechan to Mayfield Heights (Ohio) | 3,581.02 mi (5,763.10 km) |
| Pontneddfechan to Mays Chapel (Maryland) | 3,478.63 mi (5,598.31 km) |
| Pontneddfechan to Maywood (California) | 5,318.41 mi (8,559.16 km) |
| Pontneddfechan to Maywood (Illinois) | 3,815.38 mi (6,140.26 km) |
| Pontneddfechan to McAlester (Oklahoma) | 4,457.52 mi (7,173.69 km) |
| Pontneddfechan to McAllen (Texas) | 5,004.08 mi (8,053.29 km) |
| Pontneddfechan to McCalla (Alabama) | 4,189.80 mi (6,742.83 km) |
| Pontneddfechan to McComb (Mississippi) | 4,431.82 mi (7,132.32 km) |
| Pontneddfechan to McDonough (Georgia) | 4,065.19 mi (6,542.29 km) |
| Pontneddfechan to McFarland (California) | 5,257.44 mi (8,461.04 km) |
| Pontneddfechan to McHenry (Illinois) | 3,811.69 mi (6,134.32 km) |
