| Clarkston to Collegno | 4,694.73 mi (7,555.44 km) |
| Clarkston to Cologno al Serio | 4,771.09 mi (7,678.33 km) |
| Clarkston to Cologno Monzese | 4,754.70 mi (7,651.95 km) |
| Clarkston to Colorno | 4,821.41 mi (7,759.30 km) |
| Clarkston to Comacchio | 4,906.57 mi (7,896.37 km) |
| Clarkston to Comiso | 5,289.66 mi (8,512.89 km) |
| Clarkston to Como | 4,737.57 mi (7,624.38 km) |
| Clarkston to Concordia Sagittaria | 4,898.92 mi (7,884.05 km) |
| Clarkston to Concorezzo | 4,755.25 mi (7,652.83 km) |
| Clarkston to Conegliano | 4,871.64 mi (7,840.14 km) |
| Clarkston to Conselice | 4,897.69 mi (7,882.07 km) |
| Clarkston to Conselve | 4,875.17 mi (7,845.83 km) |
| Clarkston to Conversano | 5,253.69 mi (8,455.00 km) |
| Clarkston to Copertino | 5,321.14 mi (8,563.55 km) |
| Clarkston to Copparo | 4,884.86 mi (7,861.43 km) |
