| Portage to Oberkirch | 4,272.82 mi (6,876.45 km) |
| Portage to Obernburg am Main | 4,263.69 mi (6,861.75 km) |
| Portage to Obernkirchen | 4,172.85 mi (6,715.56 km) |
| Portage to Oberschleissheim | 4,416.20 mi (7,107.18 km) |
| Portage to Oberstdorf | 4,400.42 mi (7,081.79 km) |
| Portage to Obertraubling | 4,410.19 mi (7,097.52 km) |
| Portage to Obertshausen | 4,243.69 mi (6,829.55 km) |
| Portage to Oberursel | 4,229.03 mi (6,805.97 km) |
| Portage to Ochsenfurt | 4,305.42 mi (6,928.91 km) |
| Portage to Ochsenhausen | 4,361.83 mi (7,019.68 km) |
| Portage to Ochtrup | 4,105.36 mi (6,606.93 km) |
| Portage to Odenthal | 4,144.38 mi (6,669.74 km) |
| Portage to Oelde | 4,153.58 mi (6,684.55 km) |
| Portage to Oelsnitz | 4,352.93 mi (7,005.36 km) |
| Portage to Oer-Erkenschwick | 4,127.56 mi (6,642.66 km) |
