| Diamond Bar to Cloverleaf (Texas) | 1,356.81 mi (2,183.57 km) |
| Diamond Bar to Cloverly (Maryland) | 2,273.47 mi (3,658.80 km) |
| Diamond Bar to Clovis (California) | 221.90 mi (357.12 km) |
| Diamond Bar to Clovis (New Mexico) | 835.33 mi (1,344.33 km) |
| Diamond Bar to Clute (Texas) | 1,361.41 mi (2,190.99 km) |
| Diamond Bar to Coachella (California) | 98.35 mi (158.28 km) |
| Diamond Bar to Coalinga (California) | 205.01 mi (329.93 km) |
| Diamond Bar to Coamo (Puerto Rico) | 3,340.34 mi (5,375.75 km) |
| Diamond Bar to Coatesville (Pennsylvania) | 2,332.28 mi (3,753.45 km) |
| Diamond Bar to Cockeysville (Maryland) | 2,291.49 mi (3,687.79 km) |
| Diamond Bar to Cocoa (Florida) | 2,211.71 mi (3,559.40 km) |
| Diamond Bar to Cocoa Beach (Florida) | 2,220.87 mi (3,574.15 km) |
| Diamond Bar to Coconut Creek (Florida) | 2,297.37 mi (3,697.26 km) |
| Diamond Bar to Coeur d'Alene (Idaho) | 948.39 mi (1,526.29 km) |
| Diamond Bar to Cohoes (New York) | 2,435.15 mi (3,918.99 km) |
