| Rancho San Diego to Romeoville (Illinois) | 1,690.59 mi (2,720.73 km) |
| Rancho San Diego to Romulus (Michigan) | 1,937.28 mi (3,117.75 km) |
| Rancho San Diego to Ronkonkoma (New York) | 2,459.76 mi (3,958.60 km) |
| Rancho San Diego to Roosevelt (New York) | 2,435.92 mi (3,920.23 km) |
| Rancho San Diego to Rosamond (California) | 163.26 mi (262.74 km) |
| Rancho San Diego to Rosaryville (Maryland) | 2,267.25 mi (3,648.78 km) |
| Rancho San Diego to Roscoe (Illinois) | 1,657.67 mi (2,667.76 km) |
| Rancho San Diego to Rose Hill (Virginia) | 2,252.03 mi (3,624.29 km) |
| Rancho San Diego to Roseburg (Oregon) | 802.53 mi (1,291.54 km) |
| Rancho San Diego to Rosedale (California) | 223.68 mi (359.99 km) |
| Rancho San Diego to Rosedale (Maryland) | 2,283.18 mi (3,674.42 km) |
| Rancho San Diego to Roselle (Illinois) | 1,696.37 mi (2,730.04 km) |
| Rancho San Diego to Roselle (New Jersey) | 2,400.51 mi (3,863.25 km) |
| Rancho San Diego to Roselle Park (New Jersey) | 2,400.15 mi (3,862.67 km) |
| Rancho San Diego to Rosemead (California) | 112.45 mi (180.96 km) |
