| Southborough to Castrovillari | 1,095.46 mi (1,762.98 km) |
| Southborough to Catania | 1,190.09 mi (1,915.27 km) |
| Southborough to Catanzaro | 1,158.38 mi (1,864.24 km) |
| Southborough to Cattolica | 762.98 mi (1,227.90 km) |
| Southborough to Cava de' Tirreni | 998.28 mi (1,606.58 km) |
| Southborough to Cavallino | 1,138.79 mi (1,832.70 km) |
| Southborough to Cavarzere | 684.12 mi (1,100.99 km) |
| Southborough to Cave | 880.70 mi (1,417.35 km) |
| Southborough to Cavriago | 650.94 mi (1,047.59 km) |
| Southborough to Cavriglia | 743.26 mi (1,196.17 km) |
| Southborough to Cazzago San Martino | 590.10 mi (949.67 km) |
| Southborough to Ceccano | 907.07 mi (1,459.79 km) |
| Southborough to Cecina | 723.17 mi (1,163.83 km) |
| Southborough to Cefalu | 1,127.54 mi (1,814.60 km) |
| Southborough to Ceglie Messapico | 1,096.89 mi (1,765.27 km) |
