| Rancho San Diego to Oberkirch | 5,877.15 mi (9,458.36 km) |
| Rancho San Diego to Obernburg am Main | 5,844.39 mi (9,405.64 km) |
| Rancho San Diego to Obernkirchen | 5,721.40 mi (9,207.71 km) |
| Rancho San Diego to Oberschleissheim | 5,999.53 mi (9,655.32 km) |
| Rancho San Diego to Oberstdorf | 6,003.17 mi (9,661.17 km) |
| Rancho San Diego to Obertraubling | 5,980.23 mi (9,624.26 km) |
| Rancho San Diego to Obertshausen | 5,823.60 mi (9,372.17 km) |
| Rancho San Diego to Oberursel | 5,808.94 mi (9,348.58 km) |
| Rancho San Diego to Ochsenfurt | 5,882.07 mi (9,466.27 km) |
| Rancho San Diego to Ochsenhausen | 5,958.95 mi (9,590.00 km) |
| Rancho San Diego to Ochtrup | 5,667.80 mi (9,121.45 km) |
| Rancho San Diego to Odenthal | 5,723.22 mi (9,210.63 km) |
| Rancho San Diego to Oelde | 5,714.71 mi (9,196.94 km) |
| Rancho San Diego to Oelsnitz | 5,904.42 mi (9,502.24 km) |
| Rancho San Diego to Oer-Erkenschwick | 5,697.32 mi (9,168.95 km) |
