| Diamond Bar to Cadillac (Michigan) | 1,860.38 mi (2,993.99 km) |
| Diamond Bar to Caguas (Puerto Rico) | 3,353.54 mi (5,397.01 km) |
| Diamond Bar to Cahokia (Illinois) | 1,565.04 mi (2,518.69 km) |
| Diamond Bar to Calabasas (California) | 49.74 mi (80.04 km) |
| Diamond Bar to Caldwell (Idaho) | 669.36 mi (1,077.24 km) |
| Diamond Bar to Caledonia (Wisconsin) | 1,720.36 mi (2,768.65 km) |
| Diamond Bar to Calera (Alabama) | 1,783.06 mi (2,869.55 km) |
| Diamond Bar to Calexico (California) | 161.87 mi (260.51 km) |
| Diamond Bar to Calhoun (Georgia) | 1,869.76 mi (3,009.09 km) |
| Diamond Bar to California (Maryland) | 2,305.25 mi (3,709.94 km) |
| Diamond Bar to California City (California) | 80.11 mi (128.93 km) |
| Diamond Bar to Callaway (Florida) | 1,899.71 mi (3,057.30 km) |
| Diamond Bar to Calumet City (Illinois) | 1,723.67 mi (2,773.97 km) |
| Diamond Bar to Calverton (Maryland) | 2,276.42 mi (3,663.55 km) |
| Diamond Bar to Camano (Washington) | 1,009.27 mi (1,624.27 km) |
