| California to Cividale del Friuli | 4,382.84 mi (7,053.50 km) |
| California to Civita Castellana | 4,466.85 mi (7,188.70 km) |
| California to Civitanova Marche | 4,490.48 mi (7,226.73 km) |
| California to Civitavecchia | 4,446.41 mi (7,155.80 km) |
| California to Civitella in Val di Chiana | 4,398.31 mi (7,078.40 km) |
| California to Clusone | 4,241.84 mi (6,826.58 km) |
| California to Coccaglio | 4,253.07 mi (6,844.66 km) |
| California to Codigoro | 4,368.69 mi (7,030.73 km) |
| California to Codogno | 4,253.92 mi (6,846.03 km) |
| California to Codroipo | 4,368.25 mi (7,030.02 km) |
| California to Cogoleto | 4,231.78 mi (6,810.39 km) |
| California to Colle di Val d'Elsa | 4,373.20 mi (7,037.98 km) |
| California to Colle Salvetti | 4,337.97 mi (6,981.29 km) |
| California to Collecchio | 4,289.15 mi (6,902.72 km) |
| California to Colleferro | 4,513.27 mi (7,263.40 km) |
