| Southborough to Benavente | 949.89 mi (1,528.69 km) |
| Southborough to Bombarral | 939.17 mi (1,511.44 km) |
| Southborough to Bougado | 797.71 mi (1,283.79 km) |
| Southborough to Braga | 781.33 mi (1,257.42 km) |
| Southborough to Braganca | 726.74 mi (1,169.57 km) |
| Southborough to Cabeceiras de Basto | 772.46 mi (1,243.16 km) |
| Southborough to Cacem | 973.72 mi (1,567.05 km) |
| Southborough to Cadaval | 940.04 mi (1,512.86 km) |
| Southborough to Caldas da Rainha | 930.07 mi (1,496.81 km) |
| Southborough to Calheta | 1,548.58 mi (2,492.20 km) |
| Southborough to Camara de Lobos | 1,545.06 mi (2,486.54 km) |
| Southborough to Canico | 1,544.71 mi (2,485.97 km) |
| Southborough to Cantanhede | 859.19 mi (1,382.73 km) |
| Southborough to Carregal do Sal | 840.07 mi (1,351.97 km) |
| Southborough to Cartaxo | 938.01 mi (1,509.58 km) |
