| Diamond Bar to Clemson (South Carolina) | 1,987.36 mi (3,198.35 km) |
| Diamond Bar to Clermont (Florida) | 2,153.64 mi (3,465.94 km) |
| Diamond Bar to Cleveland (Mississippi) | 1,549.48 mi (2,493.65 km) |
| Diamond Bar to Cleveland (Ohio) | 2,024.97 mi (3,258.87 km) |
| Diamond Bar to Cleveland (Tennessee) | 1,867.13 mi (3,004.86 km) |
| Diamond Bar to Cleveland Heights (Ohio) | 2,031.13 mi (3,268.79 km) |
| Diamond Bar to Cliffside Park (New Jersey) | 2,425.21 mi (3,903.01 km) |
| Diamond Bar to Clifton (Colorado) | 626.20 mi (1,007.77 km) |
| Diamond Bar to Clifton (New Jersey) | 2,416.21 mi (3,888.51 km) |
| Diamond Bar to Clinton (Iowa) | 1,589.34 mi (2,557.80 km) |
| Diamond Bar to Clinton (Maryland) | 2,280.33 mi (3,669.83 km) |
| Diamond Bar to Clinton (Mississippi) | 1,588.25 mi (2,556.04 km) |
| Diamond Bar to Clinton (Utah) | 584.96 mi (941.40 km) |
| Diamond Bar to Clive (Iowa) | 1,406.87 mi (2,264.13 km) |
| Diamond Bar to Cloquet (Minnesota) | 1,585.83 mi (2,552.15 km) |
