| Rancho San Diego to Cividale del Friuli | 6,169.39 mi (9,928.68 km) |
| Rancho San Diego to Civita Castellana | 6,337.34 mi (10,198.96 km) |
| Rancho San Diego to Civitanova Marche | 6,327.55 mi (10,183.20 km) |
| Rancho San Diego to Civitavecchia | 6,327.19 mi (10,182.63 km) |
| Rancho San Diego to Civitella in Val di Chiana | 6,255.80 mi (10,067.73 km) |
| Rancho San Diego to Clusone | 6,070.78 mi (9,769.98 km) |
| Rancho San Diego to Coccaglio | 6,088.05 mi (9,797.77 km) |
| Rancho San Diego to Codigoro | 6,194.84 mi (9,969.63 km) |
| Rancho San Diego to Codogno | 6,099.69 mi (9,816.51 km) |
| Rancho San Diego to Codroipo | 6,162.66 mi (9,917.84 km) |
| Rancho San Diego to Cogoleto | 6,103.44 mi (9,822.53 km) |
| Rancho San Diego to Colle di Val d'Elsa | 6,237.35 mi (10,038.05 km) |
| Rancho San Diego to Colle Salvetti | 6,205.37 mi (9,986.57 km) |
| Rancho San Diego to Collecchio | 6,137.48 mi (9,877.33 km) |
| Rancho San Diego to Colleferro | 6,387.14 mi (10,279.11 km) |
