| San Diego to Cividale del Friuli | 6,171.55 mi (9,932.16 km) |
| San Diego to Civita Castellana | 6,340.16 mi (10,203.50 km) |
| San Diego to Civitanova Marche | 6,330.06 mi (10,187.25 km) |
| San Diego to Civitavecchia | 6,330.11 mi (10,187.32 km) |
| San Diego to Civitella in Val di Chiana | 6,258.54 mi (10,072.15 km) |
| San Diego to Clusone | 6,073.37 mi (9,774.15 km) |
| San Diego to Coccaglio | 6,090.69 mi (9,802.01 km) |
| San Diego to Codigoro | 6,197.33 mi (9,973.64 km) |
| San Diego to Codogno | 6,102.42 mi (9,820.89 km) |
| San Diego to Codroipo | 6,164.89 mi (9,921.44 km) |
| San Diego to Cogoleto | 6,106.39 mi (9,827.29 km) |
| San Diego to Colle di Val d'Elsa | 6,240.16 mi (10,042.57 km) |
| San Diego to Colle Salvetti | 6,208.23 mi (9,991.17 km) |
| San Diego to Collecchio | 6,140.21 mi (9,881.71 km) |
| San Diego to Colleferro | 6,389.96 mi (10,283.65 km) |
