| Diamond Bar to Cernavoda | 6,614.56 mi (10,645.10 km) |
| Diamond Bar to Chitila | 6,555.68 mi (10,550.35 km) |
| Diamond Bar to Cisnadie | 6,438.91 mi (10,362.42 km) |
| Diamond Bar to Cluj-Napoca | 6,362.51 mi (10,239.48 km) |
| Diamond Bar to Codlea | 6,471.32 mi (10,414.58 km) |
| Diamond Bar to Comanesti | 6,450.89 mi (10,381.71 km) |
| Diamond Bar to Comarnic | 6,502.66 mi (10,465.03 km) |
| Diamond Bar to Constanta | 6,638.83 mi (10,684.16 km) |
| Diamond Bar to Corabia | 6,562.97 mi (10,562.08 km) |
| Diamond Bar to Costesti | 6,519.02 mi (10,491.35 km) |
| Diamond Bar to Covasna | 6,479.76 mi (10,428.17 km) |
| Diamond Bar to Craiova | 6,512.29 mi (10,480.53 km) |
| Diamond Bar to Cristuru Secuiesc | 6,425.92 mi (10,341.52 km) |
| Diamond Bar to Cugir | 6,411.59 mi (10,318.46 km) |
| Diamond Bar to Cumpana | 6,640.36 mi (10,686.62 km) |
