| Diamond Bar to Cehegin | 5,985.58 mi (9,632.86 km) |
| Diamond Bar to Cervello | 5,977.05 mi (9,619.14 km) |
| Diamond Bar to Cervera | 5,938.46 mi (9,557.02 km) |
| Diamond Bar to Ceuti | 6,007.53 mi (9,668.19 km) |
| Diamond Bar to Cheste | 5,966.00 mi (9,601.36 km) |
| Diamond Bar to Chiclana de la Frontera | 5,878.91 mi (9,461.20 km) |
| Diamond Bar to Chipiona | 5,852.90 mi (9,419.33 km) |
| Diamond Bar to Chiva | 5,965.00 mi (9,599.74 km) |
| Diamond Bar to Churriana de la Vega | 5,952.28 mi (9,579.26 km) |
| Diamond Bar to Ciempozuelos | 5,818.21 mi (9,363.50 km) |
| Diamond Bar to Cieza | 5,994.20 mi (9,646.73 km) |
| Diamond Bar to Cisterniga | 5,710.76 mi (9,190.58 km) |
| Diamond Bar to Ciudad de Melilla | 6,066.41 mi (9,762.94 km) |
| Diamond Bar to Ciudad Real | 5,858.87 mi (9,428.94 km) |
| Diamond Bar to Ciudad-Rodrigo | 5,680.54 mi (9,141.94 km) |
