| Rancho San Diego to Collegno | 6,032.67 mi (9,708.64 km) |
| Rancho San Diego to Cologno al Serio | 6,077.96 mi (9,781.53 km) |
| Rancho San Diego to Cologno Monzese | 6,066.92 mi (9,763.77 km) |
| Rancho San Diego to Colorno | 6,133.55 mi (9,870.99 km) |
| Rancho San Diego to Comacchio | 6,203.95 mi (9,984.29 km) |
| Rancho San Diego to Comiso | 6,695.30 mi (10,775.04 km) |
| Rancho San Diego to Como | 6,046.34 mi (9,730.65 km) |
| Rancho San Diego to Concordia Sagittaria | 6,168.97 mi (9,928.01 km) |
| Rancho San Diego to Concorezzo | 6,065.71 mi (9,761.82 km) |
| Rancho San Diego to Conegliano | 6,145.39 mi (9,890.06 km) |
| Rancho San Diego to Conselice | 6,202.26 mi (9,981.58 km) |
| Rancho San Diego to Conselve | 6,165.95 mi (9,923.14 km) |
| Rancho San Diego to Conversano | 6,561.60 mi (10,559.87 km) |
| Rancho San Diego to Copertino | 6,629.69 mi (10,669.46 km) |
| Rancho San Diego to Copparo | 6,182.27 mi (9,949.40 km) |
