| Morro Bay to Oerlinghausen | 5,677.37 mi (9,136.85 km) |
| Morro Bay to Oestrich-Winkel | 5,763.63 mi (9,275.67 km) |
| Morro Bay to Offenburg | 5,843.21 mi (9,403.73 km) |
| Morro Bay to Oftersheim | 5,813.81 mi (9,356.42 km) |
| Morro Bay to Ohrdruf | 5,794.42 mi (9,325.22 km) |
| Morro Bay to Ohringen | 5,848.91 mi (9,412.91 km) |
| Morro Bay to Olbernhau | 5,871.59 mi (9,449.41 km) |
| Morro Bay to Olching | 5,954.34 mi (9,582.58 km) |
| Morro Bay to Oldenburg | 5,602.60 mi (9,016.52 km) |
| Morro Bay to Oldenburg in Holstein | 5,609.06 mi (9,026.92 km) |
| Morro Bay to Olfen | 5,655.51 mi (9,101.66 km) |
| Morro Bay to Olpe | 5,705.00 mi (9,181.31 km) |
| Morro Bay to Olsberg | 5,705.27 mi (9,181.75 km) |
| Morro Bay to Oranienburg | 5,752.53 mi (9,257.80 km) |
| Morro Bay to Ortenberg | 5,774.25 mi (9,292.76 km) |
