| Rancho Santa Margarita to Clemson (South Carolina) | 1,980.29 mi (3,186.97 km) |
| Rancho Santa Margarita to Clermont (Florida) | 2,141.22 mi (3,445.97 km) |
| Rancho Santa Margarita to Cleveland (Mississippi) | 1,540.39 mi (2,479.02 km) |
| Rancho Santa Margarita to Cleveland (Ohio) | 2,024.79 mi (3,258.58 km) |
| Rancho Santa Margarita to Cleveland (Tennessee) | 1,860.35 mi (2,993.94 km) |
| Rancho Santa Margarita to Cleveland Heights (Ohio) | 2,030.98 mi (3,268.55 km) |
| Rancho Santa Margarita to Cliffside Park (New Jersey) | 2,424.41 mi (3,901.71 km) |
| Rancho Santa Margarita to Clifton (Colorado) | 631.97 mi (1,017.06 km) |
| Rancho Santa Margarita to Clifton (New Jersey) | 2,415.43 mi (3,887.26 km) |
| Rancho Santa Margarita to Clinton (Iowa) | 1,590.48 mi (2,559.63 km) |
| Rancho Santa Margarita to Clinton (Maryland) | 2,277.58 mi (3,665.41 km) |
| Rancho Santa Margarita to Clinton (Mississippi) | 1,577.58 mi (2,538.86 km) |
| Rancho Santa Margarita to Clinton (Utah) | 600.81 mi (966.90 km) |
| Rancho Santa Margarita to Clive (Iowa) | 1,408.51 mi (2,266.77 km) |
| Rancho Santa Margarita to Cloquet (Minnesota) | 1,593.38 mi (2,564.29 km) |
