| Southborough to Melzo | 573.37 mi (922.74 km) |
| Southborough to Mendicino | 1,125.25 mi (1,810.91 km) |
| Southborough to Menfi | 1,123.53 mi (1,808.14 km) |
| Southborough to Mentana | 860.81 mi (1,385.35 km) |
| Southborough to Merano | 583.02 mi (938.28 km) |
| Southborough to Merate | 564.02 mi (907.71 km) |
| Southborough to Mercato San Severino | 996.00 mi (1,602.91 km) |
| Southborough to Mercogliano | 987.73 mi (1,589.60 km) |
| Southborough to Mesagne | 1,111.81 mi (1,789.29 km) |
| Southborough to Messina | 1,164.34 mi (1,873.83 km) |
| Southborough to Mestre | 673.93 mi (1,084.58 km) |
| Southborough to Mestrino | 658.34 mi (1,059.50 km) |
| Southborough to Milan | 567.49 mi (913.29 km) |
| Southborough to Milazzo | 1,153.24 mi (1,855.96 km) |
| Southborough to Minerbio | 687.08 mi (1,105.75 km) |
