| Diamond Bar to Corato | 6,485.34 mi (10,437.15 km) |
| Diamond Bar to Corbetta | 6,016.95 mi (9,683.34 km) |
| Diamond Bar to Corciano | 6,247.63 mi (10,054.59 km) |
| Diamond Bar to Cordenons | 6,108.04 mi (9,829.94 km) |
| Diamond Bar to Cori | 6,347.68 mi (10,215.60 km) |
| Diamond Bar to Coriano | 6,213.07 mi (9,998.97 km) |
| Diamond Bar to Corigliano Calabro | 6,575.04 mi (10,581.50 km) |
| Diamond Bar to Corleone | 6,566.49 mi (10,567.74 km) |
| Diamond Bar to Cormano | 6,020.69 mi (9,689.36 km) |
| Diamond Bar to Cornaredo | 6,018.98 mi (9,686.62 km) |
| Diamond Bar to Cornate d'Adda | 6,025.10 mi (9,696.47 km) |
| Diamond Bar to Cornedo Vicentino | 6,086.16 mi (9,794.72 km) |
| Diamond Bar to Correggio | 6,112.96 mi (9,837.86 km) |
| Diamond Bar to Corridonia | 6,280.40 mi (10,107.33 km) |
| Diamond Bar to Corsico | 6,025.11 mi (9,696.48 km) |
