| Havre de Grace to Mauldin (South Carolina) | 473.62 mi (762.22 km) |
| Havre de Grace to Maumee (Ohio) | 419.99 mi (675.91 km) |
| Havre de Grace to Maumelle (Arkansas) | 951.49 mi (1,531.28 km) |
| Havre de Grace to Mayagüez (Puerto Rico) | 1,569.63 mi (2,526.07 km) |
| Havre de Grace to Mayfield Heights (Ohio) | 311.56 mi (501.40 km) |
| Havre de Grace to Mays Chapel (Maryland) | 29.69 mi (47.78 km) |
| Havre de Grace to Maywood (California) | 2,338.59 mi (3,763.59 km) |
| Havre de Grace to Maywood (Illinois) | 634.49 mi (1,021.12 km) |
| Havre de Grace to McAlester (Oklahoma) | 1,124.92 mi (1,810.38 km) |
| Havre de Grace to McAllen (Texas) | 1,572.70 mi (2,531.02 km) |
| Havre de Grace to McCalla (Alabama) | 743.73 mi (1,196.92 km) |
| Havre de Grace to McComb (Mississippi) | 989.45 mi (1,592.37 km) |
| Havre de Grace to McDonough (Georgia) | 613.79 mi (987.80 km) |
| Havre de Grace to McFarland (California) | 2,352.95 mi (3,786.70 km) |
| Havre de Grace to McHenry (Illinois) | 663.52 mi (1,067.83 km) |
