| Cwmbran to Marysville (California) | 5,156.09 mi (8,297.92 km) |
| Cwmbran to Marysville (Ohio) | 3,739.77 mi (6,018.58 km) |
| Cwmbran to Marysville (Washington) | 4,667.75 mi (7,512.02 km) |
| Cwmbran to Maryville (Missouri) | 4,180.05 mi (6,727.15 km) |
| Cwmbran to Maryville (Tennessee) | 3,972.82 mi (6,393.64 km) |
| Cwmbran to Mason (Ohio) | 3,817.09 mi (6,143.02 km) |
| Cwmbran to Mason City (Iowa) | 3,983.91 mi (6,411.48 km) |
| Cwmbran to Massapequa (New York) | 3,319.51 mi (5,342.24 km) |
| Cwmbran to Massapequa Park (New York) | 3,318.05 mi (5,339.88 km) |
| Cwmbran to Massillon (Ohio) | 3,641.60 mi (5,860.59 km) |
| Cwmbran to Mastic (New York) | 3,287.80 mi (5,291.20 km) |
| Cwmbran to Mastic Beach (New York) | 3,289.18 mi (5,293.42 km) |
| Cwmbran to Matteson (Illinois) | 3,853.53 mi (6,201.65 km) |
| Cwmbran to Matthews (North Carolina) | 3,868.34 mi (6,225.49 km) |
| Cwmbran to Mattoon (Illinois) | 3,971.87 mi (6,392.10 km) |
