| Southborough to Marsala | 1,097.80 mi (1,766.74 km) |
| Southborough to Marsciano | 802.60 mi (1,291.67 km) |
| Southborough to Martano | 1,148.28 mi (1,847.98 km) |
| Southborough to Martellago | 668.45 mi (1,075.76 km) |
| Southborough to Martina Franca | 1,088.42 mi (1,751.64 km) |
| Southborough to Martinengo | 581.75 mi (936.24 km) |
| Southborough to Martinsicuro | 858.04 mi (1,380.88 km) |
| Southborough to Mascali | 1,178.91 mi (1,897.26 km) |
| Southborough to Mascalucia | 1,185.02 mi (1,907.11 km) |
| Southborough to Masera di Padova | 668.06 mi (1,075.14 km) |
| Southborough to Maserada sul Piave | 665.55 mi (1,071.10 km) |
| Southborough to Massa | 672.54 mi (1,082.35 km) |
| Southborough to Massa Lombarda | 707.27 mi (1,138.25 km) |
| Southborough to Massafra | 1,086.72 mi (1,748.90 km) |
| Southborough to Massalubrense | 991.40 mi (1,595.50 km) |
