| Monrovia to Oberkirch | 5,829.11 mi (9,381.04 km) |
| Monrovia to Obernburg am Main | 5,793.81 mi (9,324.23 km) |
| Monrovia to Obernkirchen | 5,667.89 mi (9,121.59 km) |
| Monrovia to Oberschleissheim | 5,948.69 mi (9,573.50 km) |
| Monrovia to Oberstdorf | 5,954.51 mi (9,582.86 km) |
| Monrovia to Obertraubling | 5,928.02 mi (9,540.22 km) |
| Monrovia to Obertshausen | 5,773.00 mi (9,290.75 km) |
| Monrovia to Oberursel | 5,758.39 mi (9,267.24 km) |
| Monrovia to Ochsenfurt | 5,830.91 mi (9,383.94 km) |
| Monrovia to Ochsenhausen | 5,909.80 mi (9,510.90 km) |
| Monrovia to Ochtrup | 5,615.91 mi (9,037.94 km) |
| Monrovia to Odenthal | 5,672.86 mi (9,129.59 km) |
| Monrovia to Oelde | 5,662.51 mi (9,112.94 km) |
| Monrovia to Oelsnitz | 5,850.53 mi (9,415.53 km) |
| Monrovia to Oer-Erkenschwick | 5,646.09 mi (9,086.50 km) |
