| Southborough to Mendota Heights (Minnesota) | 4,038.57 mi (6,499.44 km) |
| Southborough to Menifee (California) | 5,455.50 mi (8,779.78 km) |
| Southborough to Menlo Park (California) | 5,393.49 mi (8,679.98 km) |
| Southborough to Menomonee Falls (Wisconsin) | 3,933.99 mi (6,331.14 km) |
| Southborough to Menomonie (Wisconsin) | 3,993.73 mi (6,427.29 km) |
| Southborough to Mentor (Ohio) | 3,737.61 mi (6,015.10 km) |
| Southborough to Mequon (Wisconsin) | 3,924.79 mi (6,316.34 km) |
| Southborough to Merced (California) | 5,352.21 mi (8,613.55 km) |
| Southborough to Mercedes (Texas) | 5,163.87 mi (8,310.44 km) |
| Southborough to Mercer Island (Washington) | 4,813.32 mi (7,746.30 km) |
| Southborough to Mercerville (New Jersey) | 3,533.63 mi (5,686.84 km) |
| Southborough to Meriden (Connecticut) | 3,400.17 mi (5,472.05 km) |
| Southborough to Meridian (Idaho) | 4,872.39 mi (7,841.35 km) |
| Southborough to Meridian (Mississippi) | 4,472.61 mi (7,197.97 km) |
| Southborough to Merriam (Kansas) | 4,378.31 mi (7,046.21 km) |
