| Rancho Santa Margarita to Cividale del Friuli | 6,138.94 mi (9,879.67 km) |
| Rancho Santa Margarita to Civita Castellana | 6,310.33 mi (10,155.49 km) |
| Rancho Santa Margarita to Civitanova Marche | 6,298.93 mi (10,137.15 km) |
| Rancho Santa Margarita to Civitavecchia | 6,300.73 mi (10,140.04 km) |
| Rancho Santa Margarita to Civitella in Val di Chiana | 6,228.39 mi (10,023.63 km) |
| Rancho Santa Margarita to Clusone | 6,042.59 mi (9,724.61 km) |
| Rancho Santa Margarita to Coccaglio | 6,060.09 mi (9,752.78 km) |
| Rancho Santa Margarita to Codigoro | 6,166.12 mi (9,923.41 km) |
| Rancho Santa Margarita to Codogno | 6,072.21 mi (9,772.28 km) |
| Rancho Santa Margarita to Codroipo | 6,132.59 mi (9,869.44 km) |
| Rancho Santa Margarita to Cogoleto | 6,077.20 mi (9,780.31 km) |
| Rancho Santa Margarita to Colle di Val d'Elsa | 6,210.33 mi (9,994.56 km) |
| Rancho Santa Margarita to Colle Salvetti | 6,178.61 mi (9,943.50 km) |
| Rancho Santa Margarita to Collecchio | 6,110.01 mi (9,833.11 km) |
| Rancho Santa Margarita to Colleferro | 6,360.15 mi (10,235.67 km) |
