| Eau Claire to Oberkirch | 4,370.42 mi (7,033.51 km) |
| Eau Claire to Obernburg am Main | 4,351.66 mi (7,003.31 km) |
| Eau Claire to Obernkirchen | 4,247.63 mi (6,835.90 km) |
| Eau Claire to Oberschleissheim | 4,506.27 mi (7,252.14 km) |
| Eau Claire to Oberstdorf | 4,498.19 mi (7,239.13 km) |
| Eau Claire to Obertraubling | 4,495.02 mi (7,234.03 km) |
| Eau Claire to Obertshausen | 4,331.19 mi (6,970.38 km) |
| Eau Claire to Oberursel | 4,316.43 mi (6,946.63 km) |
| Eau Claire to Ochsenfurt | 4,392.08 mi (7,068.36 km) |
| Eau Claire to Ochsenhausen | 4,457.05 mi (7,172.93 km) |
| Eau Claire to Ochtrup | 4,184.96 mi (6,735.04 km) |
| Eau Claire to Odenthal | 4,230.75 mi (6,808.73 km) |
| Eau Claire to Oelde | 4,233.05 mi (6,812.43 km) |
| Eau Claire to Oelsnitz | 4,430.22 mi (7,129.75 km) |
| Eau Claire to Oer-Erkenschwick | 4,210.20 mi (6,775.67 km) |
