| Rancho San Diego to Oakleaf Plantation (Florida) | 2,066.11 mi (3,325.08 km) |
| Rancho San Diego to Oakley (California) | 450.38 mi (724.82 km) |
| Rancho San Diego to Oakton (Virginia) | 2,241.43 mi (3,607.23 km) |
| Rancho San Diego to Oakville (Missouri) | 1,539.08 mi (2,476.90 km) |
| Rancho San Diego to Oatfield (Oregon) | 924.87 mi (1,488.44 km) |
| Rancho San Diego to Ocala (Florida) | 2,065.40 mi (3,323.94 km) |
| Rancho San Diego to Ocean Acres (New Jersey) | 2,400.99 mi (3,864.01 km) |
| Rancho San Diego to Ocean City (New Jersey) | 2,385.19 mi (3,838.59 km) |
| Rancho San Diego to Ocean Pines (Maryland) | 2,359.06 mi (3,796.54 km) |
| Rancho San Diego to Ocean Pointe (Hawaii) | 2,632.27 mi (4,236.23 km) |
| Rancho San Diego to Ocean Springs (Mississippi) | 1,658.99 mi (2,669.88 km) |
| Rancho San Diego to Oceanside (California) | 39.08 mi (62.90 km) |
| Rancho San Diego to Oceanside (New York) | 2,433.22 mi (3,915.89 km) |
| Rancho San Diego to Ocoee (Florida) | 2,112.90 mi (3,400.38 km) |
| Rancho San Diego to Oconomowoc (Wisconsin) | 1,694.86 mi (2,727.61 km) |
