| Diamond Bar to Cibolo (Texas) | 1,189.43 mi (1,914.19 km) |
| Diamond Bar to Cicero (Illinois) | 1,715.28 mi (2,760.47 km) |
| Diamond Bar to Cimarron Hills (Colorado) | 801.76 mi (1,290.30 km) |
| Diamond Bar to Cincinnati (Ohio) | 1,871.35 mi (3,011.64 km) |
| Diamond Bar to Cinco Ranch (Texas) | 1,324.38 mi (2,131.39 km) |
| Diamond Bar to Circleville (Ohio) | 1,955.56 mi (3,147.17 km) |
| Diamond Bar to Citrus (California) | 9.09 mi (14.63 km) |
| Diamond Bar to Citrus Heights (California) | 377.53 mi (607.58 km) |
| Diamond Bar to Citrus Park (Florida) | 2,116.11 mi (3,405.55 km) |
| Diamond Bar to Claiborne (Louisiana) | 1,479.54 mi (2,381.08 km) |
| Diamond Bar to Claremont (California) | 10.48 mi (16.87 km) |
| Diamond Bar to Claremont (New Hampshire) | 2,503.85 mi (4,029.56 km) |
| Diamond Bar to Claremore (Oklahoma) | 1,261.77 mi (2,030.63 km) |
| Diamond Bar to Clarksburg (Maryland) | 2,258.68 mi (3,635.00 km) |
| Diamond Bar to Clarksburg (West Virginia) | 2,095.11 mi (3,371.75 km) |
