| Wauwatosa to Oberkirch | 4,325.79 mi (6,961.69 km) |
| Wauwatosa to Obernburg am Main | 4,312.95 mi (6,941.02 km) |
| Wauwatosa to Obernkirchen | 4,216.92 mi (6,786.48 km) |
| Wauwatosa to Oberschleissheim | 4,466.43 mi (7,188.02 km) |
| Wauwatosa to Oberstdorf | 4,453.59 mi (7,167.36 km) |
| Wauwatosa to Obertraubling | 4,458.40 mi (7,175.09 km) |
| Wauwatosa to Obertshausen | 4,292.75 mi (6,908.51 km) |
| Wauwatosa to Oberursel | 4,278.04 mi (6,884.83 km) |
| Wauwatosa to Ochsenfurt | 4,354.22 mi (7,007.44 km) |
| Wauwatosa to Ochsenhausen | 4,413.98 mi (7,103.62 km) |
| Wauwatosa to Ochtrup | 4,151.21 mi (6,680.73 km) |
| Wauwatosa to Odenthal | 4,192.89 mi (6,747.81 km) |
| Wauwatosa to Oelde | 4,199.44 mi (6,758.35 km) |
| Wauwatosa to Oelsnitz | 4,398.17 mi (7,078.16 km) |
| Wauwatosa to Oer-Erkenschwick | 4,174.61 mi (6,718.39 km) |
