| Caldicot to McKeesport (Pennsylvania) | 3,606.13 mi (5,803.50 km) |
| Caldicot to McKinleyville (California) | 5,138.07 mi (8,268.93 km) |
| Caldicot to McKinney (Texas) | 4,617.04 mi (7,430.41 km) |
| Caldicot to McLean (Virginia) | 3,560.35 mi (5,729.84 km) |
| Caldicot to McMinnville (Oregon) | 4,868.76 mi (7,835.51 km) |
| Caldicot to McMinnville (Tennessee) | 4,061.30 mi (6,536.03 km) |
| Caldicot to McNair (Virginia) | 3,568.93 mi (5,743.64 km) |
| Caldicot to McPherson (Kansas) | 4,393.95 mi (7,071.38 km) |
| Caldicot to Mead Valley (California) | 5,332.23 mi (8,581.39 km) |
| Caldicot to Meadow Woods (Florida) | 4,234.59 mi (6,814.91 km) |
| Caldicot to Meadowbrook (Virginia) | 3,639.97 mi (5,857.96 km) |
| Caldicot to Meadville (Pennsylvania) | 3,560.77 mi (5,730.51 km) |
| Caldicot to Mebane (North Carolina) | 3,776.15 mi (6,077.13 km) |
| Caldicot to Mechanicsville (Virginia) | 3,626.20 mi (5,835.80 km) |
| Caldicot to Medford (Massachusetts) | 3,161.28 mi (5,087.58 km) |
