| Clausthal-Zellerfeld to Catania | 1,015.07 mi (1,633.60 km) |
| Clausthal-Zellerfeld to Catanzaro | 941.23 mi (1,514.76 km) |
| Clausthal-Zellerfeld to Cattolica | 552.77 mi (889.60 km) |
| Clausthal-Zellerfeld to Cava de' Tirreni | 794.74 mi (1,279.00 km) |
| Clausthal-Zellerfeld to Cavallino | 877.55 mi (1,412.28 km) |
| Clausthal-Zellerfeld to Cavarzere | 467.57 mi (752.48 km) |
| Clausthal-Zellerfeld to Cave | 700.85 mi (1,127.91 km) |
| Clausthal-Zellerfeld to Cavriago | 490.99 mi (790.17 km) |
| Clausthal-Zellerfeld to Cavriglia | 575.13 mi (925.58 km) |
| Clausthal-Zellerfeld to Cazzago San Martino | 430.22 mi (692.37 km) |
| Clausthal-Zellerfeld to Ceccano | 721.36 mi (1,160.92 km) |
| Clausthal-Zellerfeld to Cecina | 586.54 mi (943.95 km) |
| Clausthal-Zellerfeld to Cefalu | 968.10 mi (1,558.01 km) |
| Clausthal-Zellerfeld to Ceglie Messapico | 842.40 mi (1,355.71 km) |
| Clausthal-Zellerfeld to Celano | 688.29 mi (1,107.70 km) |
