| Simi Valley to Oberkirch | 5,846.33 mi (9,408.76 km) |
| Simi Valley to Obernburg am Main | 5,810.05 mi (9,350.37 km) |
| Simi Valley to Obernkirchen | 5,682.99 mi (9,145.89 km) |
| Simi Valley to Oberschleissheim | 5,964.81 mi (9,599.43 km) |
| Simi Valley to Oberstdorf | 5,971.48 mi (9,610.17 km) |
| Simi Valley to Obertraubling | 5,943.59 mi (9,565.28 km) |
| Simi Valley to Obertshausen | 5,789.24 mi (9,316.89 km) |
| Simi Valley to Oberursel | 5,774.66 mi (9,293.42 km) |
| Simi Valley to Ochsenfurt | 5,846.92 mi (9,409.70 km) |
| Simi Valley to Ochsenhausen | 5,926.58 mi (9,537.91 km) |
| Simi Valley to Ochtrup | 5,631.68 mi (9,063.31 km) |
| Simi Valley to Odenthal | 5,689.22 mi (9,155.91 km) |
| Simi Valley to Oelde | 5,678.14 mi (9,138.09 km) |
| Simi Valley to Oelsnitz | 5,865.45 mi (9,439.53 km) |
| Simi Valley to Oer-Erkenschwick | 5,662.11 mi (9,112.28 km) |
