| Clausthal-Zellerfeld to Busto Garolfo | 437.33 mi (703.82 km) |
| Clausthal-Zellerfeld to Cabras | 824.76 mi (1,327.32 km) |
| Clausthal-Zellerfeld to Cadelbosco di Sopra | 486.45 mi (782.87 km) |
| Clausthal-Zellerfeld to Cadoneghe | 445.08 mi (716.28 km) |
| Clausthal-Zellerfeld to Cagli | 580.36 mi (934.00 km) |
| Clausthal-Zellerfeld to Cagliari | 870.99 mi (1,401.72 km) |
| Clausthal-Zellerfeld to Cairo Montenotte | 520.41 mi (837.51 km) |
| Clausthal-Zellerfeld to Caivano | 773.15 mi (1,244.26 km) |
| Clausthal-Zellerfeld to Calcinaia | 561.31 mi (903.33 km) |
| Clausthal-Zellerfeld to Calcinato | 438.54 mi (705.77 km) |
| Clausthal-Zellerfeld to Calderara di Reno | 501.94 mi (807.80 km) |
| Clausthal-Zellerfeld to Caldogno | 431.95 mi (695.16 km) |
| Clausthal-Zellerfeld to Calenzano | 549.83 mi (884.86 km) |
| Clausthal-Zellerfeld to Calolziocorte | 416.92 mi (670.97 km) |
| Clausthal-Zellerfeld to Caltagirone | 1,026.89 mi (1,652.63 km) |
