| Southborough to Cernavoda | 1,363.56 mi (2,194.44 km) |
| Southborough to Chitila | 1,270.15 mi (2,044.11 km) |
| Southborough to Cisnadie | 1,151.69 mi (1,853.46 km) |
| Southborough to Cluj-Napoca | 1,095.21 mi (1,762.57 km) |
| Southborough to Codlea | 1,207.54 mi (1,943.34 km) |
| Southborough to Comanesti | 1,228.51 mi (1,977.09 km) |
| Southborough to Comarnic | 1,230.15 mi (1,979.73 km) |
| Southborough to Constanta | 1,395.17 mi (2,245.31 km) |
| Southborough to Corabia | 1,234.35 mi (1,986.50 km) |
| Southborough to Costesti | 1,217.73 mi (1,959.75 km) |
| Southborough to Covasna | 1,234.59 mi (1,986.88 km) |
| Southborough to Craiova | 1,184.85 mi (1,906.83 km) |
| Southborough to Cristuru Secuiesc | 1,171.63 mi (1,885.56 km) |
| Southborough to Cugir | 1,113.89 mi (1,792.64 km) |
| Southborough to Cumpana | 1,393.74 mi (2,243.00 km) |
