| Morro Bay to Oberkirch | 5,844.04 mi (9,405.08 km) |
| Morro Bay to Obernburg am Main | 5,804.36 mi (9,341.22 km) |
| Morro Bay to Obernkirchen | 5,673.46 mi (9,130.54 km) |
| Morro Bay to Oberschleissheim | 5,958.54 mi (9,589.34 km) |
| Morro Bay to Oberstdorf | 5,968.18 mi (9,604.85 km) |
| Morro Bay to Obertraubling | 5,935.46 mi (9,552.20 km) |
| Morro Bay to Obertshausen | 5,783.57 mi (9,307.75 km) |
| Morro Bay to Oberursel | 5,769.07 mi (9,284.43 km) |
| Morro Bay to Ochsenfurt | 5,840.39 mi (9,399.19 km) |
| Morro Bay to Ochsenhausen | 5,922.67 mi (9,531.61 km) |
| Morro Bay to Ochtrup | 5,624.46 mi (9,051.69 km) |
| Morro Bay to Odenthal | 5,684.02 mi (9,147.55 km) |
| Morro Bay to Oelde | 5,670.43 mi (9,125.68 km) |
| Morro Bay to Oelsnitz | 5,855.13 mi (9,422.92 km) |
| Morro Bay to Oer-Erkenschwick | 5,655.75 mi (9,102.05 km) |
