| San Diego to Oberkirch | 5,879.55 mi (9,462.23 km) |
| San Diego to Obernburg am Main | 5,846.49 mi (9,409.01 km) |
| San Diego to Obernkirchen | 5,723.13 mi (9,210.50 km) |
| San Diego to Oberschleissheim | 6,001.60 mi (9,658.64 km) |
| San Diego to Oberstdorf | 6,005.50 mi (9,664.92 km) |
| San Diego to Obertraubling | 5,982.13 mi (9,627.31 km) |
| San Diego to Obertshausen | 5,825.69 mi (9,375.54 km) |
| San Diego to Oberursel | 5,811.03 mi (9,351.96 km) |
| San Diego to Ochsenfurt | 5,884.09 mi (9,469.53 km) |
| San Diego to Ochsenhausen | 5,961.22 mi (9,593.66 km) |
| San Diego to Ochtrup | 5,669.73 mi (9,124.55 km) |
| San Diego to Odenthal | 5,725.33 mi (9,214.03 km) |
| San Diego to Oelde | 5,716.61 mi (9,199.99 km) |
| San Diego to Oelsnitz | 5,906.11 mi (9,504.97 km) |
| San Diego to Oer-Erkenschwick | 5,699.33 mi (9,172.19 km) |
