| Southborough to Marysville (California) | 5,278.71 mi (8,495.26 km) |
| Southborough to Marysville (Ohio) | 3,883.48 mi (6,249.86 km) |
| Southborough to Marysville (Washington) | 4,781.99 mi (7,695.87 km) |
| Southborough to Maryville (Missouri) | 4,319.70 mi (6,951.89 km) |
| Southborough to Maryville (Tennessee) | 4,117.73 mi (6,626.85 km) |
| Southborough to Mason (Ohio) | 3,960.89 mi (6,374.44 km) |
| Southborough to Mason City (Iowa) | 4,122.56 mi (6,634.63 km) |
| Southborough to Massapequa (New York) | 3,464.87 mi (5,576.17 km) |
| Southborough to Massapequa Park (New York) | 3,463.40 mi (5,573.81 km) |
| Southborough to Massillon (Ohio) | 3,785.56 mi (6,092.27 km) |
| Southborough to Mastic (New York) | 3,433.19 mi (5,525.18 km) |
| Southborough to Mastic Beach (New York) | 3,434.58 mi (5,527.42 km) |
| Southborough to Matteson (Illinois) | 3,995.34 mi (6,429.88 km) |
| Southborough to Matthews (North Carolina) | 4,013.78 mi (6,459.56 km) |
| Southborough to Mattoon (Illinois) | 4,114.45 mi (6,621.57 km) |
