| Piacenza to Mauldin (South Carolina) | 4,660.54 mi (7,500.42 km) |
| Piacenza to Maumee (Ohio) | 4,421.04 mi (7,114.97 km) |
| Piacenza to Maumelle (Arkansas) | 5,082.93 mi (8,180.19 km) |
| Piacenza to Mayagüez (Puerto Rico) | 4,701.56 mi (7,566.43 km) |
| Piacenza to Mayfield Heights (Ohio) | 4,332.97 mi (6,973.25 km) |
| Piacenza to Mays Chapel (Maryland) | 4,217.16 mi (6,786.87 km) |
| Piacenza to Maywood (California) | 6,076.26 mi (9,778.79 km) |
| Piacenza to Maywood (Illinois) | 4,574.63 mi (7,362.16 km) |
| Piacenza to McAlester (Oklahoma) | 5,215.47 mi (8,393.48 km) |
| Piacenza to McAllen (Texas) | 5,752.33 mi (9,257.48 km) |
| Piacenza to McCalla (Alabama) | 4,931.50 mi (7,936.49 km) |
| Piacenza to McComb (Mississippi) | 5,175.44 mi (8,329.07 km) |
| Piacenza to McDonough (Georgia) | 4,801.14 mi (7,726.68 km) |
| Piacenza to McFarland (California) | 6,012.19 mi (9,675.69 km) |
| Piacenza to McHenry (Illinois) | 4,571.82 mi (7,357.64 km) |
