| Castricum to Mauldin (South Carolina) | 4,239.69 mi (6,823.12 km) |
| Castricum to Maumee (Ohio) | 3,960.08 mi (6,373.13 km) |
| Castricum to Maumelle (Arkansas) | 4,622.57 mi (7,439.30 km) |
| Castricum to Mayagüez (Puerto Rico) | 4,466.12 mi (7,187.53 km) |
| Castricum to Mayfield Heights (Ohio) | 3,879.54 mi (6,243.51 km) |
| Castricum to Mays Chapel (Maryland) | 3,792.47 mi (6,103.39 km) |
| Castricum to Maywood (California) | 5,540.99 mi (8,917.36 km) |
| Castricum to Maywood (Illinois) | 4,099.09 mi (6,596.85 km) |
| Castricum to McAlester (Oklahoma) | 4,742.81 mi (7,632.82 km) |
| Castricum to McAllen (Texas) | 5,304.07 mi (8,536.07 km) |
| Castricum to McCalla (Alabama) | 4,498.84 mi (7,240.18 km) |
| Castricum to McComb (Mississippi) | 4,738.35 mi (7,625.64 km) |
| Castricum to McDonough (Georgia) | 4,379.66 mi (7,048.39 km) |
| Castricum to McFarland (California) | 5,471.84 mi (8,806.07 km) |
| Castricum to McHenry (Illinois) | 4,092.91 mi (6,586.90 km) |
