| Diamond Bar to Crawfordsville (Indiana) | 1,746.49 mi (2,810.70 km) |
| Diamond Bar to Crest Hill (Illinois) | 1,694.52 mi (2,727.06 km) |
| Diamond Bar to Crestview (Florida) | 1,829.55 mi (2,944.38 km) |
| Diamond Bar to Crestwood (Illinois) | 1,714.29 mi (2,758.89 km) |
| Diamond Bar to Crestwood (Missouri) | 1,554.27 mi (2,501.36 km) |
| Diamond Bar to Creve Coeur (Missouri) | 1,551.21 mi (2,496.43 km) |
| Diamond Bar to Crofton (Maryland) | 2,291.03 mi (3,687.06 km) |
| Diamond Bar to Crossville (Tennessee) | 1,852.40 mi (2,981.15 km) |
| Diamond Bar to Crowley (Louisiana) | 1,507.65 mi (2,426.33 km) |
| Diamond Bar to Crowley (Texas) | 1,183.66 mi (1,904.91 km) |
| Diamond Bar to Crown Point (Indiana) | 1,732.37 mi (2,787.98 km) |
| Diamond Bar to Crystal (Minnesota) | 1,501.43 mi (2,416.31 km) |
| Diamond Bar to Crystal Lake (Illinois) | 1,690.40 mi (2,720.44 km) |
| Diamond Bar to Cudahy (California) | 21.17 mi (34.07 km) |
| Diamond Bar to Cudahy (Wisconsin) | 1,722.88 mi (2,772.71 km) |
