| Caldicot to Mauldin (South Carolina) | 3,962.42 mi (6,376.89 km) |
| Caldicot to Maumee (Ohio) | 3,703.81 mi (5,960.70 km) |
| Caldicot to Maumelle (Arkansas) | 4,366.59 mi (7,027.34 km) |
| Caldicot to Mayagüez (Puerto Rico) | 4,146.29 mi (6,672.81 km) |
| Caldicot to Mayfield Heights (Ohio) | 3,618.61 mi (5,823.59 km) |
| Caldicot to Mays Chapel (Maryland) | 3,516.31 mi (5,658.95 km) |
| Caldicot to Maywood (California) | 5,353.34 mi (8,615.36 km) |
| Caldicot to Maywood (Illinois) | 3,852.66 mi (6,200.26 km) |
| Caldicot to McAlester (Oklahoma) | 4,494.87 mi (7,233.80 km) |
| Caldicot to McAllen (Texas) | 5,041.71 mi (8,113.85 km) |
| Caldicot to McCalla (Alabama) | 4,227.48 mi (6,803.47 km) |
| Caldicot to McComb (Mississippi) | 4,469.50 mi (7,192.96 km) |
| Caldicot to McDonough (Georgia) | 4,102.86 mi (6,602.92 km) |
| Caldicot to McFarland (California) | 5,291.93 mi (8,516.53 km) |
| Caldicot to McHenry (Illinois) | 3,848.91 mi (6,194.22 km) |
