| Southborough to Cividale del Friuli | 694.09 mi (1,117.04 km) |
| Southborough to Civita Castellana | 838.06 mi (1,348.73 km) |
| Southborough to Civitanova Marche | 830.90 mi (1,337.21 km) |
| Southborough to Civitavecchia | 829.52 mi (1,334.99 km) |
| Southborough to Civitella in Val di Chiana | 756.15 mi (1,216.90 km) |
| Southborough to Clusone | 573.07 mi (922.27 km) |
| Southborough to Coccaglio | 589.35 mi (948.46 km) |
| Southborough to Codigoro | 699.51 mi (1,125.75 km) |
| Southborough to Codogno | 600.06 mi (965.71 km) |
| Southborough to Codroipo | 681.94 mi (1,097.48 km) |
| Southborough to Cogoleto | 607.70 mi (978.01 km) |
| Southborough to Colle di Val d'Elsa | 738.08 mi (1,187.83 km) |
| Southborough to Colle Salvetti | 706.78 mi (1,137.45 km) |
| Southborough to Collecchio | 637.85 mi (1,026.52 km) |
| Southborough to Colleferro | 887.88 mi (1,428.91 km) |
