| Diamond Bar to Cervignano del Friuli | 6,135.82 mi (9,874.64 km) |
| Diamond Bar to Cesa | 6,427.00 mi (10,343.25 km) |
| Diamond Bar to Cesano Maderno | 6,015.84 mi (9,681.55 km) |
| Diamond Bar to Cesena | 6,192.68 mi (9,966.16 km) |
| Diamond Bar to Cesenatico | 6,194.13 mi (9,968.49 km) |
| Diamond Bar to Cetraro | 6,562.51 mi (10,561.34 km) |
| Diamond Bar to Cherasco | 6,024.53 mi (9,695.54 km) |
| Diamond Bar to Chiampo | 6,087.61 mi (9,797.06 km) |
| Diamond Bar to Chiaravalle | 6,255.76 mi (10,067.67 km) |
| Diamond Bar to Chiari | 6,045.14 mi (9,728.72 km) |
| Diamond Bar to Chiavari | 6,089.94 mi (9,800.81 km) |
| Diamond Bar to Chieri | 6,004.50 mi (9,663.31 km) |
| Diamond Bar to Chieti | 6,349.63 mi (10,218.74 km) |
| Diamond Bar to Chioggia | 6,136.04 mi (9,875.00 km) |
| Diamond Bar to Chiusi | 6,243.15 mi (10,047.39 km) |
