| Clausthal-Zellerfeld to Civita Castellana | 664.15 mi (1,068.84 km) |
| Clausthal-Zellerfeld to Civitanova Marche | 608.45 mi (979.20 km) |
| Clausthal-Zellerfeld to Civitavecchia | 674.06 mi (1,084.80 km) |
| Clausthal-Zellerfeld to Civitella in Val di Chiana | 583.11 mi (938.42 km) |
| Clausthal-Zellerfeld to Clusone | 409.52 mi (659.06 km) |
| Clausthal-Zellerfeld to Coccaglio | 431.57 mi (694.54 km) |
| Clausthal-Zellerfeld to Codigoro | 488.56 mi (786.26 km) |
| Clausthal-Zellerfeld to Codogno | 460.03 mi (740.34 km) |
| Clausthal-Zellerfeld to Codroipo | 421.09 mi (677.68 km) |
| Clausthal-Zellerfeld to Cogoleto | 518.23 mi (834.01 km) |
| Clausthal-Zellerfeld to Colle di Val d'Elsa | 581.91 mi (936.49 km) |
| Clausthal-Zellerfeld to Colle Salvetti | 566.95 mi (912.42 km) |
| Clausthal-Zellerfeld to Collecchio | 487.48 mi (784.53 km) |
| Clausthal-Zellerfeld to Colleferro | 707.23 mi (1,138.18 km) |
| Clausthal-Zellerfeld to Collegno | 481.68 mi (775.18 km) |
