| Bargoed to Mauldin (South Carolina) | 3,940.30 mi (6,341.30 km) |
| Bargoed to Maumee (Ohio) | 3,681.77 mi (5,925.24 km) |
| Bargoed to Maumelle (Arkansas) | 4,344.54 mi (6,991.87 km) |
| Bargoed to Mayagüez (Puerto Rico) | 4,126.52 mi (6,641.00 km) |
| Bargoed to Mayfield Heights (Ohio) | 3,596.53 mi (5,788.06 km) |
| Bargoed to Mays Chapel (Maryland) | 3,494.18 mi (5,623.34 km) |
| Bargoed to Maywood (California) | 5,332.78 mi (8,582.28 km) |
| Bargoed to Maywood (Illinois) | 3,830.75 mi (6,165.00 km) |
| Bargoed to McAlester (Oklahoma) | 4,472.92 mi (7,198.47 km) |
| Bargoed to McAllen (Texas) | 5,019.61 mi (8,078.28 km) |
| Bargoed to McCalla (Alabama) | 4,205.35 mi (6,767.86 km) |
| Bargoed to McComb (Mississippi) | 4,447.37 mi (7,157.35 km) |
| Bargoed to McDonough (Georgia) | 4,080.74 mi (6,567.32 km) |
| Bargoed to McFarland (California) | 5,271.63 mi (8,483.86 km) |
| Bargoed to McHenry (Illinois) | 3,827.03 mi (6,159.02 km) |
