| Rancho Santa Margarita to Collegno | 6,006.54 mi (9,666.59 km) |
| Rancho Santa Margarita to Cologno al Serio | 6,050.15 mi (9,736.78 km) |
| Rancho Santa Margarita to Cologno Monzese | 6,039.41 mi (9,719.49 km) |
| Rancho Santa Margarita to Colorno | 6,105.83 mi (9,826.38 km) |
| Rancho Santa Margarita to Comacchio | 6,175.29 mi (9,938.17 km) |
| Rancho Santa Margarita to Comiso | 6,670.74 mi (10,735.52 km) |
| Rancho Santa Margarita to Como | 6,018.73 mi (9,686.20 km) |
| Rancho Santa Margarita to Concordia Sagittaria | 6,139.12 mi (9,879.96 km) |
| Rancho Santa Margarita to Concorezzo | 6,038.12 mi (9,717.42 km) |
| Rancho Santa Margarita to Conegliano | 6,115.79 mi (9,842.41 km) |
| Rancho Santa Margarita to Conselice | 6,173.96 mi (9,936.03 km) |
| Rancho Santa Margarita to Conselve | 6,137.09 mi (9,876.70 km) |
| Rancho Santa Margarita to Conversano | 6,532.37 mi (10,512.83 km) |
| Rancho Santa Margarita to Copertino | 6,600.28 mi (10,622.13 km) |
| Rancho Santa Margarita to Copparo | 6,153.68 mi (9,903.39 km) |
