| Southborough to Cassina de' Pecchi | 570.86 mi (918.71 km) |
| Southborough to Cassino | 926.93 mi (1,491.75 km) |
| Southborough to Castagneto Carducci | 733.93 mi (1,181.14 km) |
| Southborough to Castano Primo | 549.41 mi (884.19 km) |
| Southborough to Castel Bolognese | 713.24 mi (1,147.85 km) |
| Southborough to Castel Gandolfo | 875.52 mi (1,409.02 km) |
| Southborough to Castel Goffredo | 619.37 mi (996.78 km) |
| Southborough to Castel Maggiore | 685.94 mi (1,103.92 km) |
| Southborough to Castel Mella | 598.34 mi (962.94 km) |
| Southborough to Castel San Giorgio | 993.80 mi (1,599.37 km) |
| Southborough to Castel San Giovanni | 596.76 mi (960.39 km) |
| Southborough to Castel San Pietro Terme | 701.64 mi (1,129.19 km) |
| Southborough to Castel Volturno | 953.86 mi (1,535.09 km) |
| Southborough to Castelbuono | 1,135.80 mi (1,827.90 km) |
| Southborough to Casteldaccia | 1,112.76 mi (1,790.81 km) |
