| Southborough to Los Llanos de Aridane | 1,818.06 mi (2,925.89 km) |
| Southborough to Los Palacios y Villafranca | 1,013.70 mi (1,631.40 km) |
| Southborough to Luanco | 593.11 mi (954.52 km) |
| Southborough to Lucena | 978.77 mi (1,575.17 km) |
| Southborough to Lugo | 671.26 mi (1,080.30 km) |
| Southborough to Lumbreras | 944.89 mi (1,520.65 km) |
| Southborough to Madrid | 766.20 mi (1,233.07 km) |
| Southborough to Madridejos | 828.43 mi (1,333.23 km) |
| Southborough to Mahon | 802.09 mi (1,290.85 km) |
| Southborough to Mairena del Alcor | 997.32 mi (1,605.03 km) |
| Southborough to Mairena del Aljarafe | 1,004.47 mi (1,616.54 km) |
| Southborough to Majadahonda | 764.49 mi (1,230.32 km) |
| Southborough to Malaga | 1,024.06 mi (1,648.07 km) |
| Southborough to Malgrat de Mar | 667.78 mi (1,074.69 km) |
| Southborough to Manacor | 813.25 mi (1,308.80 km) |
