| Cwmbran to Mountain Brook (Alabama) | 4,194.20 mi (6,749.92 km) |
| Cwmbran to Mountain Home (Arkansas) | 4,280.34 mi (6,888.54 km) |
| Cwmbran to Mountain Home (Idaho) | 4,753.55 mi (7,650.09 km) |
| Cwmbran to Mountain House (California) | 5,233.92 mi (8,423.18 km) |
| Cwmbran to Mountain Park (Georgia) | 4,070.06 mi (6,550.13 km) |
| Cwmbran to Mountain Top (Pennsylvania) | 3,399.24 mi (5,470.55 km) |
| Cwmbran to Mountain View (California) | 5,271.34 mi (8,483.40 km) |
| Cwmbran to Mountlake Terrace (Washington) | 4,688.04 mi (7,544.67 km) |
| Cwmbran to Mukilteo (Washington) | 4,681.34 mi (7,533.88 km) |
| Cwmbran to Muncie (Indiana) | 3,821.78 mi (6,150.57 km) |
| Cwmbran to Mundelein (Illinois) | 3,828.89 mi (6,162.00 km) |
| Cwmbran to Munhall (Pennsylvania) | 3,593.69 mi (5,783.49 km) |
| Cwmbran to Munster (Indiana) | 3,842.42 mi (6,183.78 km) |
| Cwmbran to Murfreesboro (Tennessee) | 4,066.58 mi (6,544.53 km) |
| Cwmbran to Murphy (Texas) | 4,611.79 mi (7,421.97 km) |
