| Onalaska to Oberkirch | 4,404.04 mi (7,087.62 km) |
| Onalaska to Obernburg am Main | 4,386.88 mi (7,060.00 km) |
| Onalaska to Obernkirchen | 4,284.93 mi (6,895.92 km) |
| Onalaska to Oberschleissheim | 4,541.24 mi (7,308.42 km) |
| Onalaska to Oberstdorf | 4,531.86 mi (7,293.33 km) |
| Onalaska to Obertraubling | 4,530.84 mi (7,291.69 km) |
| Onalaska to Obertshausen | 4,366.48 mi (7,027.17 km) |
| Onalaska to Oberursel | 4,351.73 mi (7,003.43 km) |
| Onalaska to Ochsenfurt | 4,427.54 mi (7,125.44 km) |
| Onalaska to Ochsenhausen | 4,491.13 mi (7,227.78 km) |
| Onalaska to Ochtrup | 4,221.44 mi (6,793.75 km) |
| Onalaska to Odenthal | 4,266.16 mi (6,865.71 km) |
| Onalaska to Oelde | 4,269.58 mi (6,871.23 km) |
| Onalaska to Oelsnitz | 4,467.23 mi (7,189.31 km) |
| Onalaska to Oer-Erkenschwick | 4,246.21 mi (6,833.61 km) |
