| Cwmbran to Marshall (Minnesota) | 4,017.27 mi (6,465.17 km) |
| Cwmbran to Marshall (Missouri) | 4,176.33 mi (6,721.15 km) |
| Cwmbran to Marshall (Texas) | 4,547.44 mi (7,318.40 km) |
| Cwmbran to Marshalltown (Iowa) | 4,025.47 mi (6,478.37 km) |
| Cwmbran to Marshfield (Wisconsin) | 3,801.88 mi (6,118.54 km) |
| Cwmbran to Martha Lake (Washington) | 4,682.88 mi (7,536.36 km) |
| Cwmbran to Martin (Tennessee) | 4,140.75 mi (6,663.89 km) |
| Cwmbran to Martinez (California) | 5,238.16 mi (8,430.01 km) |
| Cwmbran to Martinez (Georgia) | 4,001.84 mi (6,440.35 km) |
| Cwmbran to Martinsburg (West Virginia) | 3,557.14 mi (5,724.67 km) |
| Cwmbran to Martinsville (Indiana) | 3,898.91 mi (6,274.70 km) |
| Cwmbran to Martinsville (New Jersey) | 3,367.72 mi (5,419.82 km) |
| Cwmbran to Martinsville (Virginia) | 3,760.43 mi (6,051.82 km) |
| Cwmbran to Maryland City (Maryland) | 3,524.94 mi (5,672.84 km) |
| Cwmbran to Maryland Heights (Missouri) | 4,090.23 mi (6,582.59 km) |
