| Dorchester to Mauldin (South Carolina) | 3,992.84 mi (6,425.86 km) |
| Dorchester to Maumee (Ohio) | 3,740.60 mi (6,019.91 km) |
| Dorchester to Maumelle (Arkansas) | 4,403.10 mi (7,086.11 km) |
| Dorchester to Mayagüez (Puerto Rico) | 4,151.17 mi (6,680.67 km) |
| Dorchester to Mayfield Heights (Ohio) | 3,654.20 mi (5,880.87 km) |
| Dorchester to Mays Chapel (Maryland) | 3,547.35 mi (5,708.91 km) |
| Dorchester to Maywood (California) | 5,402.66 mi (8,694.74 km) |
| Dorchester to Maywood (Illinois) | 3,891.82 mi (6,263.27 km) |
| Dorchester to McAlester (Oklahoma) | 4,533.34 mi (7,295.70 km) |
| Dorchester to McAllen (Texas) | 5,076.20 mi (8,169.36 km) |
| Dorchester to McCalla (Alabama) | 4,259.69 mi (6,855.31 km) |
| Dorchester to McComb (Mississippi) | 4,502.35 mi (7,245.84 km) |
| Dorchester to McDonough (Georgia) | 4,133.37 mi (6,652.02 km) |
| Dorchester to McFarland (California) | 5,342.36 mi (8,597.70 km) |
| Dorchester to McHenry (Illinois) | 3,888.63 mi (6,258.15 km) |
