| Southborough to Montevarchi | 745.49 mi (1,199.75 km) |
| Southborough to Monticello Conte Otto | 644.85 mi (1,037.79 km) |
| Southborough to Montichiari | 610.78 mi (982.95 km) |
| Southborough to Montignoso | 674.48 mi (1,085.47 km) |
| Southborough to Montopoli in Val d'Arno | 711.64 mi (1,145.28 km) |
| Southborough to Monza | 564.40 mi (908.32 km) |
| Southborough to Morbegno | 547.84 mi (881.66 km) |
| Southborough to Mori | 611.65 mi (984.35 km) |
| Southborough to Morlupo | 849.32 mi (1,366.84 km) |
| Southborough to Morrovalle | 824.80 mi (1,327.39 km) |
| Southborough to Mortara | 564.44 mi (908.37 km) |
| Southborough to Mosciano Sant'Angelo | 863.59 mi (1,389.81 km) |
| Southborough to Motta di Livenza | 675.34 mi (1,086.86 km) |
| Southborough to Motta Sant'Anastasia | 1,186.43 mi (1,909.37 km) |
| Southborough to Mottola | 1,081.22 mi (1,740.06 km) |
