| Rancho San Diego to Rockville (Maryland) | 2,248.95 mi (3,619.33 km) |
| Rancho San Diego to Rockville Centre (New York) | 2,433.08 mi (3,915.66 km) |
| Rancho San Diego to Rockwall (Texas) | 1,187.20 mi (1,910.61 km) |
| Rancho San Diego to Rocky Mount (North Carolina) | 2,227.01 mi (3,584.03 km) |
| Rancho San Diego to Rocky Point (New York) | 2,469.39 mi (3,974.11 km) |
| Rancho San Diego to Rocky River (Ohio) | 2,007.98 mi (3,231.53 km) |
| Rancho San Diego to Roessleville (New York) | 2,425.76 mi (3,903.89 km) |
| Rancho San Diego to Rogers (Arkansas) | 1,315.60 mi (2,117.26 km) |
| Rancho San Diego to Rogers (Minnesota) | 1,510.59 mi (2,431.06 km) |
| Rancho San Diego to Rohnert Park (California) | 504.12 mi (811.30 km) |
| Rancho San Diego to Rolla (Missouri) | 1,457.37 mi (2,345.41 km) |
| Rancho San Diego to Rolling Meadows (Illinois) | 1,700.84 mi (2,737.24 km) |
| Rancho San Diego to Roma (Texas) | 1,160.17 mi (1,867.12 km) |
| Rancho San Diego to Rome (Georgia) | 1,823.62 mi (2,934.83 km) |
| Rancho San Diego to Rome (New York) | 2,342.00 mi (3,769.09 km) |
