| Clayton to Collegno | 733.23 mi (1,180.02 km) |
| Clayton to Cologno al Serio | 763.52 mi (1,228.77 km) |
| Clayton to Cologno Monzese | 754.12 mi (1,213.64 km) |
| Clayton to Colorno | 819.38 mi (1,318.66 km) |
| Clayton to Comacchio | 887.17 mi (1,427.76 km) |
| Clayton to Comiso | 1,402.30 mi (2,256.78 km) |
| Clayton to Como | 733.00 mi (1,179.65 km) |
| Clayton to Concordia Sagittaria | 854.29 mi (1,374.84 km) |
| Clayton to Concorezzo | 752.43 mi (1,210.92 km) |
| Clayton to Conegliano | 829.82 mi (1,335.47 km) |
| Clayton to Conselice | 886.00 mi (1,425.88 km) |
| Clayton to Conselve | 849.10 mi (1,366.50 km) |
| Clayton to Conversano | 1,244.92 mi (2,003.50 km) |
| Clayton to Copertino | 1,313.19 mi (2,113.38 km) |
| Clayton to Copparo | 865.55 mi (1,392.97 km) |
