| Dorchester to McKeesport (Pennsylvania) | 3,639.82 mi (5,857.73 km) |
| Dorchester to McKinleyville (California) | 5,192.16 mi (8,355.97 km) |
| Dorchester to McKinney (Texas) | 4,654.91 mi (7,491.36 km) |
| Dorchester to McLean (Virginia) | 3,591.26 mi (5,779.58 km) |
| Dorchester to McMinnville (Oregon) | 4,923.84 mi (7,924.16 km) |
| Dorchester to McMinnville (Tennessee) | 4,094.57 mi (6,589.57 km) |
| Dorchester to McNair (Virginia) | 3,599.98 mi (5,793.60 km) |
| Dorchester to McPherson (Kansas) | 4,435.59 mi (7,138.40 km) |
| Dorchester to Mead Valley (California) | 5,381.08 mi (8,660.01 km) |
| Dorchester to Meadow Woods (Florida) | 4,259.21 mi (6,854.54 km) |
| Dorchester to Meadowbrook (Virginia) | 3,669.67 mi (5,905.76 km) |
| Dorchester to Meadville (Pennsylvania) | 3,595.79 mi (5,786.86 km) |
| Dorchester to Mebane (North Carolina) | 3,805.78 mi (6,124.81 km) |
| Dorchester to Mechanicsville (Virginia) | 3,656.00 mi (5,883.76 km) |
| Dorchester to Medford (Massachusetts) | 3,192.10 mi (5,137.19 km) |
