| Rancho San Diego to Cordele (Georgia) | 1,927.63 mi (3,102.22 km) |
| Rancho San Diego to Corinth (Mississippi) | 1,631.36 mi (2,625.43 km) |
| Rancho San Diego to Corinth (Texas) | 1,149.52 mi (1,849.97 km) |
| Rancho San Diego to Cornelius (North Carolina) | 2,058.56 mi (3,312.93 km) |
| Rancho San Diego to Cornelius (Oregon) | 939.90 mi (1,512.62 km) |
| Rancho San Diego to Corning (New York) | 2,257.95 mi (3,633.82 km) |
| Rancho San Diego to Corona (California) | 84.59 mi (136.14 km) |
| Rancho San Diego to Coronado (California) | 15.53 mi (24.99 km) |
| Rancho San Diego to Corpus Christi (Texas) | 1,215.19 mi (1,955.67 km) |
| Rancho San Diego to Corsicana (Texas) | 1,191.96 mi (1,918.28 km) |
| Rancho San Diego to Cortland (New York) | 2,304.54 mi (3,708.79 km) |
| Rancho San Diego to Corvallis (Oregon) | 884.27 mi (1,423.10 km) |
| Rancho San Diego to Coshocton (Ohio) | 2,001.14 mi (3,220.52 km) |
| Rancho San Diego to Costa Mesa (California) | 84.88 mi (136.59 km) |
| Rancho San Diego to Coto de Caza (California) | 69.29 mi (111.51 km) |
