| Clausthal-Zellerfeld to Cologno al Serio | 430.85 mi (693.39 km) |
| Clausthal-Zellerfeld to Cologno Monzese | 436.32 mi (702.19 km) |
| Clausthal-Zellerfeld to Colorno | 474.79 mi (764.11 km) |
| Clausthal-Zellerfeld to Comacchio | 498.17 mi (801.72 km) |
| Clausthal-Zellerfeld to Comiso | 1,047.30 mi (1,685.46 km) |
| Clausthal-Zellerfeld to Como | 418.06 mi (672.80 km) |
| Clausthal-Zellerfeld to Concordia Sagittaria | 432.55 mi (696.13 km) |
| Clausthal-Zellerfeld to Concorezzo | 431.84 mi (694.97 km) |
| Clausthal-Zellerfeld to Conegliano | 418.48 mi (673.48 km) |
| Clausthal-Zellerfeld to Conselice | 508.25 mi (817.95 km) |
| Clausthal-Zellerfeld to Conselve | 459.41 mi (739.34 km) |
| Clausthal-Zellerfeld to Conversano | 814.76 mi (1,311.22 km) |
| Clausthal-Zellerfeld to Copertino | 877.73 mi (1,412.57 km) |
| Clausthal-Zellerfeld to Copparo | 481.99 mi (775.69 km) |
| Clausthal-Zellerfeld to Corato | 790.03 mi (1,271.44 km) |
