| Southborough to Cocentaina | 858.46 mi (1,381.56 km) |
| Southborough to Coin | 1,031.40 mi (1,659.88 km) |
| Southborough to Colindres | 563.73 mi (907.23 km) |
| Southborough to Collado-Villalba | 755.45 mi (1,215.77 km) |
| Southborough to Colmenar Viejo | 750.68 mi (1,208.10 km) |
| Southborough to Colmenarejo | 760.41 mi (1,223.77 km) |
| Southborough to Conil de la Frontera | 1,075.74 mi (1,731.23 km) |
| Southborough to Consuegra | 829.54 mi (1,335.02 km) |
| Southborough to Corbera de Llobregat | 677.81 mi (1,090.82 km) |
| Southborough to Cordoba | 949.73 mi (1,528.44 km) |
| Southborough to Coria del Rio | 1,007.54 mi (1,621.48 km) |
| Southborough to Crevillente | 893.61 mi (1,438.13 km) |
| Southborough to Cuarte de Huerva | 664.04 mi (1,068.67 km) |
| Southborough to Cubellas | 690.72 mi (1,111.61 km) |
| Southborough to Cuellar | 708.48 mi (1,140.19 km) |
