| Clarkston to Cividale del Friuli | 4,912.06 mi (7,905.19 km) |
| Clarkston to Civita Castellana | 4,998.46 mi (8,044.25 km) |
| Clarkston to Civitanova Marche | 5,021.51 mi (8,081.34 km) |
| Clarkston to Civitavecchia | 4,978.13 mi (8,011.52 km) |
| Clarkston to Civitella in Val di Chiana | 4,929.65 mi (7,933.51 km) |
| Clarkston to Clusone | 4,772.23 mi (7,680.17 km) |
| Clarkston to Coccaglio | 4,783.67 mi (7,698.57 km) |
| Clarkston to Codigoro | 4,899.24 mi (7,884.56 km) |
| Clarkston to Codogno | 4,784.81 mi (7,700.41 km) |
| Clarkston to Codroipo | 4,897.74 mi (7,882.14 km) |
| Clarkston to Cogoleto | 4,763.20 mi (7,665.63 km) |
| Clarkston to Colle di Val d'Elsa | 4,904.63 mi (7,893.24 km) |
| Clarkston to Colle Salvetti | 4,869.42 mi (7,836.58 km) |
| Clarkston to Collecchio | 4,820.15 mi (7,757.29 km) |
| Clarkston to Colleferro | 5,044.95 mi (8,119.07 km) |
