| Grimstad to Collegno | 917.40 mi (1,476.41 km) |
| Grimstad to Cologno al Serio | 882.66 mi (1,420.51 km) |
| Grimstad to Cologno Monzese | 885.69 mi (1,425.37 km) |
| Grimstad to Colorno | 929.44 mi (1,495.79 km) |
| Grimstad to Comacchio | 954.68 mi (1,536.41 km) |
| Grimstad to Comiso | 1,502.74 mi (2,418.42 km) |
| Grimstad to Como | 866.00 mi (1,393.69 km) |
| Grimstad to Concordia Sagittaria | 886.94 mi (1,427.40 km) |
| Grimstad to Concorezzo | 881.55 mi (1,418.71 km) |
| Grimstad to Conegliano | 874.37 mi (1,407.16 km) |
| Grimstad to Conselice | 964.99 mi (1,553.01 km) |
| Grimstad to Conselve | 916.09 mi (1,474.30 km) |
| Grimstad to Conversano | 1,257.15 mi (2,023.18 km) |
| Grimstad to Copertino | 1,316.46 mi (2,118.64 km) |
| Grimstad to Copparo | 938.72 mi (1,510.72 km) |
